Canon PC920 Service Manual Download

Page: 229 / 393

CHAPTER 8 ADF

8-23

Drive System

Drive Unit

1) Remove the lower cover.

(See “B. External Covers.”)

2) Remove the screw [1] and the bushing [2];

then, remove the pickup roller cover [3].

3) Remove the E-ring [4], and remove the

bearing [5].

Figure 8-210

Figure 8-211

[1]

[2]

[3]

[4]

[5]

Summary of Contents for PC920

Page 1: ...0 F13 8491 TYA00001 PC880 F13 8291 TZA00001 PC890 F13 8242 UAA00001 PC920 F13 8431 TVB00001 F13 8441 PUD00001 PUE00001 F13 8461 PUH00001 PC921 F13 8432 TVC00001 PC940 F13 8436 TVD00001 PC941 F13 8437 TVE00001 PC950 F13 8231 TVF00001 F13 8241 PUF00001 PUG00001 PC960 F13 8434 TVG00001 PC980 F13 8232 TVH00001 PC981 F13 8233 TVJ00001 ...

Page 2: ... OTHER PRINTED MATTER ANY QUESTIONS REGARDING INFORMATION CONTAINED HEREIN SHOULD BE DIRECTED TO THE COPIER SERVICE DEPARTMENT OF THE SALES COMPANY THIS DOCUMENTATION IS INTENDED FOR ALL SALES AREAS AND MAY CONTAIN INFOR MATION NOT APPLICABLE TO CERTAIN AREAS COPYRIGHT 1999 CANON INC Printed in Japan Imprimé au Japon Use of this manual should be strictly su pervised to avoid disclosure of confiden...

Page 3: ...he timing at which pickup feeding related mechanisms are operated and shows how they may be disassembled assembled and adjusted Chapter 6 Fixing System discusses the principles of operation used for the machine s fixing system It also explains the timing at which fixing related mechanisms are operated and shows how they may be disassembled assembled and adjusted Chapter 7 Externals Auxiliary Mecha...

Page 4: ... 1 is used to indicate that the voltage level of a given signal is High while 0 is used to indicate Low The voltage value however differs from circuit to circuit In practically all cases the internal mechanisms of a microprocessor cannot be checked in the field Therefore the operations of the microprocessors used in the machines are not discussed they are explained in terms of from sensors to the ...

Page 5: ...1E 2R2E 2R2E 3R1E 3R1E 3R1E 3R1E ADF as standard Cassette 250 sheets 250 sheets 250 sheets Universal Universal Universal Universal Universal Universal Universal Universal Universal 500 sheets Universal 500 sheets 500 sheets Copying speed cpm at Direct 12 12 12 10 10 10 10 10 13 13 12 12 13 10 13 13 The notation indicates that the item in question is available This service manual covers the models ...

Page 7: ... MAINTENANCE BY THE USER 1 17 VI IMAGE FORMATION 1 20 A Outline 1 20 I BASIC OPERATIONS 2 1 A Functional Construction 2 1 B Outline of Electrical Circuitry 2 2 C Basic Sequence of Operations 2 3 D Controlling the Main Motor M1 2 5 E Inputs to and Outputs from the DC Controller 2 7 I OPERATIONS 3 1 A Outline 3 1 B Varying the Reproduction Ratio 3 2 C Lens Drive System 3 3 D Scanner Drive System 3 4...

Page 8: ...Originals 4 16 G Controlling the Side Blanking Mechanism 4 21 II DISASSEMBLY ASSEMBLY 4 22 A Cartridge 4 23 B Transfer Charging Assembly 4 25 C Blank Exposure 4 26 I PICKUP FEEDING SYSTEM 5 1 A Outline 5 1 B Controlling the Pickup Roller 5 3 C Controlling the Movement of Paper 5 9 D Detecting Jams 5 12 II DISASSEMBLY ASSEMBLY 5 18 A Pickup Assembly 5 19 B Multifeeder Assembly 5 28 C Single feeder ...

Page 9: ... 1 B Basic Construction 8 2 C Basic Operations 8 4 D Detecting an Original 8 6 E Pickup Operation 8 8 F Delivery 8 12 G Controlling the Pickup Motor 8 14 H Controlling the Belt Motor 8 15 I Detecting Original Jams 8 16 J Power Supply 8 17 II DISASSEMBLY ASSEMBLY 8 18 A Removing the ADF 8 19 B External Covers 8 21 C Drive System 8 23 D Feeding System 8 26 E Electrical System 8 33 I SELECTING A SITE...

Page 10: ...er Jam 11 75 B Faulty Feeding 11 78 VI ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS 11 79 A Sensors and Solenoids 11 79 B Switches 11 80 C Lamp Heater Motor Etc 11 81 D PCBs 11 82 E ADF 11 83 F Variable Resistors VR and Check Pins by PCB 11 84 VII SELF DIAGNOSIS 11 86 A GENERAL TIMING CHART A 1 B SIGNALS AND ABBREVIATIONS A 3 C GENERAL CIRCUIT DIAGRAM A 5 D DC CONTROLLER CIRCUIT DIAGRAM A 7 E ADF...

Page 11: ...ications of the machine instructions on how to operate the machine and an outline of copying process I FEATURES 1 1 II SPECIFICATIONS 1 2 A Copier 1 2 B ADF 1 8 III NAMES OF PARTS 1 10 A External View 1 10 B Cross Section 1 13 IV USING THE MACHINE 1 15 A Control Panel 1 15 V ROUTINE MAINTENANCE BY THE USER 1 17 VI IMAGE FORMATION 1 20 A Outline 1 20 ...

Page 12: ......

Page 13: ...g speedy copying work immedi ately after power on 4 Various Paper Sizes The paper may be between A4 LGL and A5 STMT Using the universal cassette In manual feed mode paper may be as large as A4 LGL or as small as a business card 5 All in One Cartridge for Simple Maintenance The photosensitive drum toner case charging roller developing assembly and cleaning as sembly are constructed as a single enti...

Page 14: ...Body Copyboard Source of light Lens Photosensitive medium Table 1 201 2 Mechanisms Descriptions Indirect static reproduction Roller direct charging Slit moving light source Auto or manual Dry toner projection Cassette 1 pc Single feeder single feeder type Multifeeder multifeeder type Curvature separation static eliminator Flat heater Blade Center reference copyboard Item Reproduction Charging Expo...

Page 15: ...4 A4R LTRR 3 colored paper business card 200 g m2 or less label sheet 2 A4R LTRR recycled paper 64 to 80 g m2 A4R B5R eco pa per 80 g m2 A4R postcard 3 Double Sided Overlay Copying 5 Plain paper 64 to 128 g m2 colored paper business card 200 g m2 or less recycled paper 64 to 80 g m2 A4R B5R eco paper 80 g m2 A4R postcard 3 With claws Universal cassette 250 sheets of 80 g m2 paper A4 LGL to A5 STMT...

Page 16: ...1 Applies only to models with a zoom function 2 Applies only to single pickup if the multifeeder is used 3 Applies only to vertical feeding 4 Upon delivery be sure to remove each from the copy tray 5 Be sure to remove any curling before feeding for a second time 6 If stopped because paper ran out during copying operation 1 hr ...

Page 17: ... 01 ppm or less average 0 02 ppm or less max Copyboard Type 484 9 448 2 297 5 mm 1 329 0 mm 2 19 1 in 17 6 in 11 7 in 1 13 0 in 2 ADF Type 484 9 448 2 358 3 mm 1 389 8 mm 2 19 1 in 17 6 in 14 1 in 1 15 3 in 2 Copyboard Type Single feeder type 19 3 kg 1 42 5 lb 1 20 9 kg 2 46 0 lb 2 Multifeeder type 19 5 kg 1 42 9 lb 1 21 1 kg 2 46 4 lb 2 ADF Type Single feeder type 23 8 kg 1 52 4 lb 1 25 2 kg 2 55...

Page 18: ... AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 1 6 5 Default Ratios Table 1 205 2R2E Inch AB configuration 1 1 000 1 0 707 1 0816 1 1 154 1 1 414 Item Direct Reduce I Reduce II Reduce III Reduce IV Enlarge I Enlarge II 3R1E Inch configuration 1 1 000 1 0 707 1 0 786 1 0 860 1 1 414 ...

Page 19: ...3 9 13 9 10 9 12 9 12 9 12 9 12 9 12 9 12 9 10 9 10 9 10 9 10 9 10 9 10 9 10 9 10 m 9 10 9 9 10 9 10 9 10 9 10 9 9 Copy size LTRR LGL STMTR MIN LGL LTRR MARJIN MAX A4R B5R A5R A4R A5R B5R A5R B5R A4R A5R A4R A4R B5R A5R A4R A5R B5R A5R B5R A4R A5R A4R LTRR LGL STMTR MIN LGL LTRR MARJIN MAX Reproduction ratio Direct Reduce I 70 7 Reduce II 78 6 Reduce IV 86 0 Enlarge II 141 4 Direct Reduce I 70 7 R...

Page 20: ... sided copy Yes in feeding direction No Yes 446 mm sec IPC Width 474 mm 18 7 in 659 mm 25 9 in with the tray open Depth 394 mm 15 5 in Height 74 mm 2 9 in 216 mm 8 5 in with the tray open 5 kg 11 lb approx 24 VDC and 5 VDC from the host 40 W or less Temperature same as the host Humidity same as the host Item Original pickup Original orientation Original position Original separation Original type S...

Page 21: ...AU JAPON 1 9 1 The following may not be used as an original Sheet with a staple clip or glue Sheet with a cut hole or tear Sheet with holes for binding Sheet with a carbon back Sheet with a cut and paste piece Sheet with curling bending or wrinkling The specifications are subject to change for product improvement ...

Page 22: ...y tray 2 Power cord connector 3 Open close lever 1 Copyboard cover 2 Static eliminator cleaner 3 Manual feed tray 4 Right door 5 Cassette 6 Copyboard glass 4 Static eliminator 5 Copy density correction switch 6 Delivery guide plate 1 6 5 2 3 4 5 3 6 2 1 4 III NAMES OF PARTS A External View 1 Copyboard Type Figure 1 301 Figure 1 302 ...

Page 23: ...IMPRIME AU JAPON 1 11 1 ADF 2 Manual feed tray 3 Right door 1 Static eliminator cleaner 2 Delivery guide plate 3 Copy tray 4 Power cord connector 4 Cassette 5 Copyboard glass 5 4 2 3 1 5 Open close lever 6 Static eliminator 7 Copy density correction switch 7 6 5 2 4 3 1 2 ADF Type Figure 1 303 Figure 1 304 ...

Page 24: ...NERAL DESCRIPTION COPYRIGHT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 1 12 1 4 3 2 3 ADF Figure 1 305 1 Original tray 2 Original delivery tray 3 Slide guide 4 Auxiliary tray ...

Page 25: ...1 Cartridge 12 No 4 mirror 13 No 5 mirror 14 Multifeeder tray 15 Vertical path roller 16 Multifeeder pickup roller 17 Cassette pickup roller 18 Registration roller 19 Developing cylinder 20 Photosensitive drum 21 Transfer roller 22 Feed belt 23 Cassette 24 Fixing upper unit 25 Fixing lower roller 26 Cleaning roller 27 Delivery roller 28 Copy tray 29 Single feeder pickup roller 1 28 27 26 25 24 23 ...

Page 26: ...RIME AU JAPON 1 14 1 Delivery roller 2 Copy tray 3 Pickup roller 2 4 Pickup roller 1 5 Copyboard tray 6 Auxiliary tray 7 Guide plate 8 Separation pad 9 Registration roller 10 Feed belt drive roller 11 Feed belt 12 Feed belt roller 13 Feed belt link slave roller 6 5 4 3 2 1 13 12 11 9 8 7 10 2 ADF Figure 1 307 ...

Page 27: ...umber of copies or reproduction ratio The symbol turns on when indicating a ratio Stops copying or returns copy ing mode to standard mode Starts copying Turns on and off the power No 1 2 3 4 5 6 7 8 9 Remarks 100 max continuous copying Standard Mode Ratio 100 Count 1 Paper source cassette Copy density auto mode Name Copy density adjusting lever Copy density mode indicator Default ratio indicator P...

Page 28: ...r selection key 1 Default ratio key Copy density mode selection key Sets the number of copies or a zoom ratio Turns on when zoom mode is selected Selects deselects zoom mode Selects the cassette manual feed tray Selects a default reproduction ratio Selects copying density mode May be between 70 and 141 in 1 incre ments Table 1 401 1 Applies only to a multifeeder model 2 Applies only to a model equ...

Page 29: ...ing in Feeder Cleaning Mode 1 Turn on the machine and hold down the Copy Density Mode Selection key for 4 sec or more The count ratio indicator will indicate U6 Figure 1 501 2 Place about 10 sheets of blank copy paper A4 LTR on the original tray of the ADF 3 Press the Copy Start key Copy paper will be fed from the original tray The indicator flashes U6 while the feeder is being cleaned 4 Press the...

Page 30: ... AU JAPON 1 18 b 2 Cleaning by Hand 1 Wipe the feed belt with a moist cloth water or mild detergent solution in the direction of the arrow in the figure then dry wipe it Figure 1 502 2 If Jams Occur Frequently a Static Eliminator 1 Remove the static eliminator cleaner from the machine Figure 1 503 Copyboard type ...

Page 31: ...E AU JAPON 1 19 Figure 1 504 ADF type 2 Pull the open close lever to open the machine 3 Using the static eliminator cleaner clean the static eliminator Brush out the paper lint or the like from the groove of the static eliminator Figure 1 505 4 Close the machine as soon as you have finished cleaning Work briskly ...

Page 32: ...0 Scanning lamp Copyboard glass Fixed focal point lens Side blanking lamp front rear Developing blade Developing cylinder Primary charging roller Cleaning blade Transfer charging roller Static eliminator Fixing assembly Photosensitive drum VI IMAGE FORMATION A Outline The construction of the machine is as follows Figure 1 601 ...

Page 33: ...e DC Step 2 Image exposure Step 3 Development AC negative DC Step 4 Transfer negative DC Step 5 Separation curvature separation static eliminator positive DC Step 6 Fixing Step 7 Drum cleaning Figure 1 602 Delivery Flow of copy paper Rotation of the photosensitive drum 4 Transfer Static latent image formation block 2 Image exposure 3 Development 7 Drum cleaning Registration 6 Fixing 5 Separation 1...

Page 34: ......

Page 35: ...functions of each operation relationships between electrical and mechanical systems and timing at which each associated part is turned on Process speed 96 mm sec I BASIC OPERATIONS 2 1 A Functional Construction 2 1 B Outline of Electrical Circuitry 2 2 C Basic Sequence of Operations 2 3 D Controlling the Main Motor M1 2 5 E Inputs to and Outputs from the DC Controller 2 7 ...

Page 36: ......

Page 37: ...m exposure system im age formation system and control system Figure 2 101 Control system Control panel Control circuit Original illuminating block Copyboard Exposure system Image formation system Primary charging roller Drum cleaning block Developing assembly Photosensitive drum Manual feed block Pickup feeding system Pickup control block Transfer separation Feeding Fixing assembly delivery assemb...

Page 38: ...act PCB High voltage circuit block 5V 24V Main motor driver PCB Solenoid Side blanking lamp Scanner lens drive motor Scanner cooling fan Power switch Main motor Sensor switch ADF load Control panel Thermistor AE sensor PCB Scanner home position detection Lens home position detection Pre registration roller paper detection Delivery paper detection Vertical path roller paper detection Single feeder ...

Page 39: ...ontinuous Cassette I Scanner home position detection II Lens home position detection Figure 2 103 Copy Start key Power switch ON ON STBY INTR AER SCFW Forward SCFW SCRV LSTR STBY Main motor M1 Scanning lamp LA1 Primary AC bias Transfer bias Static eliminator bias Fixing heater H1 Primary DC bias Developing AC bias 0 3sec approx Developing DC bias Scanner SCRV Reverse I II I ...

Page 40: ...e varies according to the selected copy size and reproduction ratio The forward speed varies according to the selected reproduction ratio While the scanner is moving in reverse The reverse speed is about 3 3 as fast as the forward speed used in Direct From when SCRV ends to when the main motor stops Description Waits until the Copy Start key is pressed Removes residual charges from the photosensit...

Page 41: ...urrent Hall IC output MMCLK Clock pulse generator Main motor M1 Main motor drive PCB J205 4 3 2 1 24V J901 1 2 3 4 J103 6 J203 3 J104 1 J204 7 24V GND MMD MLOCK Item Power supply Drive signal Moving drive parts Control Error detection Description 24 VDC from the composite power supply Signal MMD from the DC controller PCB Photosensitive drum primary charging roller developing assembly transfer cha...

Page 42: ...have fluctuations the MLOCK signal goes 1 Related Error Code E010 While the main motor drive signal is generated the rotation of the main motor deviates from a specific number for 1 sec or more a Turning On Off the Main Motor When the main motor drive signal MMD from the DC controller circuit goes 1 the main motor driver turns on to rotate the main motor M1 b Rotating the Main Motor at a Constant ...

Page 43: ...n PS3 has detected paper 0 The light blocking plate is at PS3 1 When PS4 has detected paper 1 The light blocking plate is at PS4 1 When Q751 has detected paper 1 The light blocking plate is at PS751 0 When the surface temperature of the fixing heater increases the voltage decreases analog signal When the temperature of the scanner increases the voltage decreases analog signal Scanner home position...

Page 44: ...increases J107 4 3 2 1 24V The variation in the resistance of the fixing heater is corrected in three levels based on combinations of 2 bit signals The keys and the LEDs are wired in a matrix in the control panel PCB and the DC controller turns on or flashes the LEDs and reads key inputs AE AEREF J111 J301 DC controller PCB DIG1 HEAT0 DIG1 HEAT1 J102 2 3 4 5 J62 AE sensor PCB Control panel PCB J60...

Page 45: ...ch Transformer Line filter 220 240V model only M2 Scanner lens drive motor M1 Main motor Main motor driver PCB NF1 LF1 J207 1 2 J104 2 FU1 Fixing heater H1 J434 J16 Fixing heater activation circuit J910 3 1 J103 6 J104 1 Scanning lamp LA1 Scanning lamp activation circuit FU2 Thermal fuse 1 Thermal fuse 2 HEAT_TRG Communication with the composite power supply MMD MLOCK See p 3 7 When 0 the fixing h...

Page 46: ...enoid SL4 SL3 SL2 SL1 24V 24V 24V 24V PUSLD RGSLD LNSLD MFSLD When 0 the pickup clutch solenoid turns on When 0 the registration clutch solenoid turns on When 0 the lens solenoid turns on When 0 the multifeeder pickup solenoid turns on J106 1 2 Side blanking lamp front Side blanking lamp rear SB_LP 24V When 0 the blanking lamp turns on DC controller PCB J51 J51 J54 J52 J53 J55 Cassette pickup sole...

Page 47: ...PRINTED IN JAPAN IMPRIME AU JAPON 2 11 5 Inputs to and Outputs from the ADF Figure 2 109 Composite power supply PCB 24V 5V 5V 24V J114 1 2 REQ 3 4 ACK 5 6 TXD 7 8 8 7 6 5 4 3 2 1 RXD DC controller PCB See Chapter 8 To the ADF 4 3 2 1 To the ADF J60 J105 6 5 4 3 2 1 J202 1 2 3 4 5 6 J24 ...

Page 48: ......

Page 49: ...ve unit It also explains the timing at which these drive units are operated and shows how they may be disassembled assmbled and adjusted I OPERATIONS 3 1 A Outline 3 1 B Varying the Reproduction Ratio 3 2 C Lens Drive System 3 3 D Scanner Drive System 3 4 II EXPOSURE SYSTEM 3 9 A Controlling the Scanning Lamp 3 9 III DISASSEMBLY ASSEMBLY 3 12 A Scanner Drive Assembly 3 13 B Lens Drive Assembly 3 3...

Page 50: ......

Page 51: ...g the optical length Sub scanning direction by varying the speed of the No 1 mirror mount Scanner lens drive motor M2 Fixed focal point lens unit Mobile No 4 5 mirror unit Scanner lens drive motor M2 Scanner thermistor TH2 By a fuse blows in response to overheating of the scanning lamp to cut power to the lamp Thermal fuse FU1 blows at 128 C Table 3 101 Figure 3 101 Photosensitive drum Fixed focal...

Page 52: ...reproduction ratio in the drum axial direction main scanning direction is varied by the lens drive system and that in the drum peripheral direction sub scanning direction is changed by the scanner drive system In the lens drive system the positions of the fixed focal point lens and the No 4 5 mirror are changed to vary the reproduction ratio In the scanner system the relative speed of the No 1 mir...

Page 53: ...anner is moving C Lens Drive System 1 Outline The lens drive system is driven by the scanner lens drive motor M2 When the lens solenoid SL3 turns on the switching gear is pushed in the direction of In this condition when the scanner lens drive motor rotates in reverse direction the lens unit will move in the direction of reduction by the work of the gear and the lens cable At the same time the No ...

Page 54: ...ection of rotation changes to move the scanner forward or in reverse When moving the scanner forward the speed of rotation of the motor varies according to the selected reproduction ratio on a continuous basis when moving the scanner in reverse on the other hand its speed remains the same regardless of the selected reproduction ratio in normal copying 312mm sec about 3 3 as fast as when moving the...

Page 55: ... II SCRV I Reverse Pre registration roller paper sensor Q751 I Scanner home position detection II Lens home position detection 2 Relationship between Scanner Sensor and Signal 3 Basic Sequence of Operations scanner The microprocessor on the DC controller PCB controls the forward movement distance of the scanner with reference to the falling edge of the scanner home position signal The forward move...

Page 56: ...05 mm forward from the home position 4 Controlling the Copying Speed The machine uses a halogen lamp for scanning and the heat of the lamp increases the tempera ture of the copyboard To prevent possible overheating of the copyboard glass the temperature of the scanner is monitored by a thermistor TH2 if its reading reaches 37 5 C or higher the copying speed is reduced to 6 cpm If this mechanism tu...

Page 57: ...C controller PCB A A B B SC COM SC COM J110 SC A SC A SC B SC B M2 Motor driver circuit 24VU R399 Microprocessor 5 Controlling the Scanner Lens Drive Motor a Outline The scanner lens drive motor M2 is a 4 phase stepping motor The timing at which the drive power SC COM and pulses SC A SCA SC B SC B are generated is controlled to turn on off the scanner lens drive motor M2 or to switch the direction...

Page 58: ...A through B generated by the microprocessor Q101 Any of these pulse signals is generated when the motor is in operation while no pulse signal is generated when the motor is at rest The current switching signals from 1 to 3 generated by the microprocessor Q101 are used to control the current flowing to the motor so that it varies according to the state of the scanner and the lens c Detecting Overcu...

Page 59: ...nal LAMP_DETECT Composite power supply PCB 9 4 2 7 HIC001 Phase control circuit Arcing circuit Scanning lamp LA1 Thermal fuse FU1 Activation detection circuit Rectifying circuit Microprocessor Rectifying circuit II EXPOSURE SYSTEM A Controlling the Scanning Lamp 1 Outline Figure 3 201 shows the circuit used to control the scanning lamp and has the following func tions Turning on off the scanning l...

Page 60: ...ol the scanning lamp According to the scanner lamp active voltage signal the mi croprocessor Q900 on the composite power supply PCB controls the intensity adjustment signal PWM_1KHz and the lamp activation signal LAMP_ON to turn on off the scanning lamp LA1 When LAMP_ON is 0 The phase control circuit turns on The arcing circuit turns on The scanning lamp turns on When LAMP_ON is 1 The phase contro...

Page 61: ...the power switch will be turned off after indicating an error code for 2 sec t msec ON OFF 1kHz 1 msec Pulse duty t 100 PWM_1KHz signal 1k 1 b Controlling the Intensity of the Scanning Lamp The intensity of the lamp is controlled by the scanning lamp active voltage signal sent by the DC controller PCB in serial The microprocessor Q900 on the composite power supply PCB sends the intensity adjust me...

Page 62: ...2 Unless otherwise instructed assemble the parts by reversing the steps used to disassemble it 3 Identify the screws by type length diameter and location 4 Use the washers where necessary The screws used to mount the grounding wire and Varistors come with a washer to ensure electrical continuity 5 As necessary cut the harness band 6 As a rule do not operate the machine with any of its part removed...

Page 63: ... 1 2 3 A Scanner Drive Assembly 1 Removing the Scanner Lens Drive Motor 1 Remove the front lower cover See Chapter 7 III A 2 Removing the Front Lower Cover 2 Remove the copyboard glass See Chapter 7 III C 1 Removing the Copyboard Glass 3 Remove the four screws 1 and detach the lens cover 2 4 Disconnect the connector J110 3 from the DC controller PCB ...

Page 64: ...UG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 14 Figure 3 303 Figure 3 304 4 4 5 5 Open the machine s top unit farther and hold it in position using the handle about 30 mm in diameter of a screwdriver 6 Remove the machine s two fixing screws 4 from the scanner lens drive motor 5 ...

Page 65: ...s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 15 Figure 3 305 6 7 5 Lift 7 Free the top unit by removing the screw driver and close the top unit 8 Remove the E ring 6 then lift the cable drive pulley 7 slightly and detach the scanner lens drive motor 5 ...

Page 66: ...E SYSTEM COPYRIGHT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 16 Figure 3 306 Wind 1 5 times black cable Wind 7 5 times silver colored cable 2 Outline of the Scanner Drive Cable ...

Page 67: ...er Drive Cable a Before Starting the Work Prepare the following Mirror positioning tool Cable clip Adhesive tape 1 Set the mirror positioning tool as shown 2 Prepare about five strips of adhesive tape each one about 20 50 mm 3 Remove the copyboard glass See Chapter 7 III C 1 Removing the Copyboard Glass 4 Disconnect the connectors J101 J131 1 from the DC controller PCB ...

Page 68: ...G 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 18 Figure 3 309 Figure 3 310 2 2 4 2 2 3 3 5 4 5 5 If the machine is equipped with an ADF free the hook 2 and disconnect the two relay connectors 3 from the left upper stay 4 6 Remove the three screws 5 and detach the left upper stay 4 ...

Page 69: ...CHAPTER 3 EXPOSURE SYSTEM COPYRIGHT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 19 Figure 3 311 6 6 7 7 Remove the four screws 6 and detach the lens cover 7 ...

Page 70: ...AN IMPRIME AU JAPON 3 20 Figure 3 313 Figure 3 312 2 Shorter end Longer end 1 Face with a marking 1 3 Top View 3 b Routing the Reversing Cable 1 Wind the reversing cables silver colored 2 on the cable drive pulley 1 7 5 times with the longer end on top then secure it in position with a cable clip 3 ...

Page 71: ... JAPAN IMPRIME AU JAPON 3 21 Figure 3 314 Figure 3 315 5 Hook front 1 4 7 6 2 Put the cable drive pulley 1 into the shaft 4 and secure it in position with an E ring 5 When putting the cable drive pulley into the shaft be sure that the hook is at the front 3 Hook the shorter end 6 on the pulley 7 ...

Page 72: ...t 8 and the No 2 3 mirror mount 9 then hook it on the left rear pulley 10 and the pulley 11 of the No 2 3 mirror mount 5 After fitting the shorter end 6 on the cable hook 12 secure its end with adhe sive tape 13 Be sure that the secured end of the cable is found where the hole in the left side plate and the tip of the cable matches 6 Lead the longer end 14 along the cable drive pulley and hook it ...

Page 73: ...end 14 under the No 1 mirror mount 8 and the No 2 3 mirror mount 9 then hook it on the pulley 16 on the left front side and the pulley 17 of the No 2 3 mirror mount 8 Hook the longer end 14 on the cable hook 18 then secure its end to the left side with adhesive tape 19 Be sure that the secured end of the cable is found where the hole in the left side plate and the tip of the cable matches ...

Page 74: ...ger end forwarding cable black 2 on the top hook of the cable drive pulley 1 and wind it 1 5 times Then secure the shorter end 3 as shown with adhesive tape 4 2 Lead the longer end 5 along the cable drive pulley 1 as shown and hook it on the pulley 6 on the right front side 3 Lead the longer end 5 under the No 1 mirror mount 7 then hook it on the pul ley 8 of the No 2 3 mirror mount and lead it be...

Page 75: ... 325 5 10 11 3 7 9 3 12 4 Hook the end of the longer end 5 on the hole 10 on the right side 5 Free the shorter end 3 and hook it on the pulley 11 on the right rear side 6 Lead the shorter end 3 under the No 1 mirror mount 7 and hook it on the pul ley 12 of the No 2 3 mirror mount as shown then lead it between the No 1 mirror mount 7 and the scanning lamp 9 ...

Page 76: ...AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 26 Figure 3 327 Figure 3 328 3 13 14 3 15 5 7 Hook the end of the shorter end 3 on the hole 13 on the right side 8 Free the shorter end 3 and the longer end 5 reversing cable and connect both with a spring 14 then fit the stopper 15 ...

Page 77: ...CHAPTER 3 EXPOSURE SYSTEM COPYRIGHT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 27 Figure 3 329 1 16 9 Detach the pulley clip 16 from the cable drive pulley 1 ...

Page 78: ...800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 28 Figure 3 330 rear Figure 3 331 front 1 2 1 2 d Positioning the No 1 Mirror Mount 1 Fix the rear and the front of the No 1 mir ror mount 1 temporarily to the metal fix ing 2 of the forwarding cable ...

Page 79: ...ON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 29 Figure 3 332 rear Figure 3 333 front 4 3 3 3 3 2 Turn the cable drive pulley 4 so that the three shafts 3 of the mirror positioning tool for rear and front is as shown ...

Page 80: ... CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 30 Figure 3 334 rear Figure 3 335 front 1 1 3 While keeping the condition of step 2 tighten the positioning screw on the rear and front of the No 1 mirror mount 1 ...

Page 81: ...ve Assembly 1 Removing the Lens Cable 1 Turn on the power when the lens has moved to the Direct position disconnect the power plug 2 Remove the copyboard glass See Chapter 7 III C 1 Removing the Copyboard Glass 3 Remove the main drive assembly See Chapter 7 III D 2 Removing the Main Drive Assembly 4 Remove the four screws 1 and detach the lens cover 2 ...

Page 82: ...PRIME AU JAPON 3 32 Figure 3 337 Figure 3 338 3 Marking 4 5 6 5 Mark the position of the lens cable fixing plate 3 and the lens mount 4 with a scriber Caution When routing the lens cable be sure to refer to the marking made with a scriber 6 Disengage the lever 5 of the No 4 5 mir ror mount and the gear 6 ...

Page 83: ...APAN IMPRIME AU JAPON 3 33 Figure 3 341 Figure 3 339 Figure 3 340 7 8 6 9 10 7 Remove the screw 7 and detach the cam gear 6 and the cable retainer 8 8 Holding the middle of the No 1 mirror mount 9 move it to the center of the machine Caution Do not hold the reflecting plate 9 Remove the spring 10 ...

Page 84: ...00s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 34 Figure 3 342 Figure 3 343 11 12 13 12 10 Remove the screw 11 and detach the lens cable fixing plate 12 11 Free the lens cable 13 from the lens cable fixing plate 12 then detach the lens cable from the machine ...

Page 85: ...nt disen gaged from the cam gear 2 so that the lever will not come into contact when the cam gear rotates 2 While keeping the condition in step 1 turn on the power when the No 1 mirror mount and the lens stopped moving turn off the power The lens will move to the Direct posi tion 3 Check to make sure that the tip of the le ver 1 of the No 4 5 mirror mount and the marking 3 on the top face of the c...

Page 86: ...NTED IN JAPAN IMPRIME AU JAPON 3 36 Figure 3 346 4 2 1 4 If the tip of the lever 1 and the marking on the cam gear 2 do not match remove the fixing screw 4 of the cam gear 2 and detach the cam gear then mount the cam gear once again so that the marking on it and the tip of the lever match ...

Page 87: ... 1 Removing the Scanning Lamp 1 Disconnect the power plug 2 Remove the copyboard glass See Chapter 7 III C 1 Removing the Copyboard Glass 3 Holding the middle of the No 1 mirror mount 1 move the No 1 mirror mount 1 to the right by about 5 cm Cauiton Do not hold the reflecting plate 4 Free the harness 3 from the guide 2 then remove the screw 4 and detach the reflecting plate 5 ...

Page 88: ...ure 3 349 7 6 5 While pushing the electrode mount 6 found at the rear of the machine in the di rection of the arrow detach the scanning lamp 7 Caution 1 Do not start the work if the scanning lamp is hot 2 Do not leave fingerprints on the sur face of the scanning lamp 3 If the surface of the scanning lamp is soiled dry wipe it ...

Page 89: ...n reverse front 2 Points to Note When Mounting the Lamp When mounting the scanning lamp be sure that the logo mark or the name of the manufacturer is toward the front Further be sure that the protrusion near the middle of the lamp is as shown Caution Do not touch the lamp portion If you have replaced the scanning lamp be sure to perform intensity adjustment p 11 42 and AE adjustment p 11 43 ...

Page 90: ... plate 3 Removing the Thermal Fuse 1 Disconnect the power plug 2 Remove the copyboard glass See Chapter 7 III C 1 Removing the Copyboard Glass 3 Remove the two screws 1 and detach the thermal fuse 2 4 Points to Note When Mounting the Fuse When mounting the thermal fuse be sure that the thermal fuse is oriented as shown Make sure that the fuse is in contact with the reflecting plate ...

Page 91: ...UG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 41 5 Removing the Thermistor Unit 1 Remove the top cover See Chapter 7 III A 1 Removing the Top Cover 2 Disconnect the connector J131 1 from the DC controller PCB remove the screw 2 and detach the thermistor unit 3 Figure 3 353 1 2 3 ...

Page 92: ......

Page 93: ...ow they may be disassembled assembled and adjusted I IMAGE FORMATION SYSTEM 4 1 A Outline 4 1 B Timing Chart for the Image Formation System 4 3 C Controlling the Primary Charging Roller Bias 4 4 D Controlling the Transfer Roller Bias 4 8 E Controlling the Developing Separation Static Eliminator Bias 4 11 F Measuring the Density of Originals 4 16 G Controlling the Side Blanking Mechanism 4 21 II DI...

Page 94: ......

Page 95: ...C constant current control on off control DC constant voltage control on off control DC voltage level control DC constant voltage control on off control DC constant current control ATVC cleaning bias Voltage level control Polarity switching DC constant voltage control on off control AC constant voltage control on off control DC voltage level control Developing DC bias control Side blanking lamp Ta...

Page 96: ...4 2 Figure 4 101 Side blanking lamp Copyboard glass Scanning lamp AE sensor Developing cylinder Transfer roller High voltage circuit block Lamp regulator block Q900 Microprocessor Q101 Microprocessor DC controller PCB Composite power supply PCB Drum cartridge Photo sensitive drum Lens Primary charging roller Static eliminator ...

Page 97: ...V 400V 0 5sec approx LSTR STBY Main motor M1 Scanning lamp LA1 Primary AC bias Transfer bias Transfer cleaning bias Transfer reference bias ATVC Static eliminator bias Pre registration roller paper sensor Q751 Primary DC bias Developing AC bias Developing DC bias Scanner SCRV 500V 0 6sec approx 0 6sec approx B Timing Chart for the Image Formation System Basic Sequence of Operations Direct 2 copies...

Page 98: ...ns Turning on and off the DC AC bias Controlling the DC bias to a specific voltage Controlling the AC bias to a specific voltage Switching the level of the DC bias Both DC bias and AC bias are applied to the primary charging roller so as to ensure that the surface potential of the photosensitive drum will be uniform The level of the DC bias is switched between when forming copy images and when not...

Page 99: ... J203 5 PDC_PWM DC bias control signal PDC_S DC voltage monitor signal PAC_S AC component current monitor signal PAC_OUT AC bias output signal Amplifier Voltage separation circuit Photosensitive drum Primary charging roller T508 Microprocessor Q900 Microprocessor Q101 DC controller PCB Composite power supply PCB Serial communication High voltage transformer for primary charging ...

Page 100: ...ain a specific level When a DC AC bias is generated the microprocessor Q900 on the composite power supply PCB detects the DC voltage monitor signal PDC_S and the AC component current monitor signal PAC_S compares their levels against the reference levels and varies the DC bias control signal PDC_PWM and the AC bias output signal PAC_OUT according to the differences so as to ensure that they remain...

Page 101: ...tween the copy image area 625 V and the non copy image area 400 V The level of the DC bias is switched by the DC bias ON signal serial signal generated by the DC controller PCB The microprocessor Q900 on the composite power supply PCB varies the DC bias control signal PDC_PWM to switch the level of the DC bias See Table 4 102 Reference The machine applies a DC bias over a non copy image area betwe...

Page 102: ...nsformer control signal CLK32K Transfer overcurrent detection signal HV_LIMIT 24V T302 Transfer high voltage transformer Serial communi cation Q101 Q900 Microprocessor Microprocessor DC controller PCB Composite power supply PCB Transfer bias detection circuit Transfer bias control circuit T_FEEDBACK D Controlling the Transfer Roller Bias 1 Outline The circuit shown in Figure 4 105 is used to contr...

Page 103: ...rmer control signal CLK32K transfer DC bias ON signal T_FW_ON and transfer DC bias control signal T_FW_DRV thereby applying the transfer bias to the transfer charging roller Table 4 103 Relationship between Transfer Bias Output and Signals b Controlling the Transfer Bias to a Specific Voltage The transfer bias applied to the transfer charging roller is controlled to a specific level by the micropr...

Page 104: ...ransfer charging roller makes a single rotation the microprocessor Q900 checks the transfer current detection signal four times and determines the level of the transfer bias to apply using the average of the readings d Switching the Polarity of the Transfer Bias cleaning bias The machine uses a direct charging method allowing toner to move from the photosensitive drum to the transfer roller as whe...

Page 105: ... on and off the developing DC bias Turning on and off the AC bias turning on and off the static eliminator bias Controlling the voltage level of the developing DC bias Both AC bias and DC bias are applied to the developing cylinder while copies are being made When the photosensitive drum rotates and yet developing is not under way about 500 VDC is applied to the developing cylinder regardless of t...

Page 106: ...ircuit Developing DC bias detection circuit DC bias control signal BIAS_PWM DC bias monitor signal BIAS_S AC bias oscillation signal ACBIAS Microprocessor Q900 Microprocessor Q101 Composite power supply PCB Serial communication AE sensor PCB Control panel DC controller PCB Density correction switch SW101 J103 3 J203 6 2 7 DV_DC_ON DV_AC_ON AE signal Copy density setting signal Copy density correct...

Page 107: ...cessor Q900 on the com posite power supply PCB sends the DC bias control signal BIAS_PWM thereby applying a DC bias to the developing cylinder Table 4 104 Relationship between Developing DC Bias and Signals 3 Turning On and Off the AC Bias The AC bias is turned on and off by the developing AC bias ON signal DV_AC_ON gener ated by the DC controller PCB The DC controller PCB sends the developing AC ...

Page 108: ...ettings to change the DC component of the developing bias so as to control the copy density Setting of the density adjusting lever in manual adjustment mode Output of the AE sensor in automatic control mode Setting of copy mode toner save mode photo mode Setting of the density correction switch SW101 The density correction switch SW101 mounted on the DC controller PCB may be set to any of three le...

Page 109: ...onent V AE Mode F1 F5 F9 1 6 5 0 100 200 300 400 500 Developing bias DC component V Manual Density Mode 3 5 9 Copy density adjusting lever 1 6 5 0 100 200 300 400 500 Developing bias DC component V Position of SW101 Right Center Left Manual Density Mode 3 5 9 Copy density adjusting lever Test sheet Newspaper Original density 0 100 200 300 400 500 Developing bias DC component V Position of SW101 Ri...

Page 110: ...erial communi cation AE sensor DC controller PCB Composite power supply PCB Microprocessor Microprocessor F Measuring the Density of Originals 1 Outline The machine is equipped with an auto density adjustment AE mechanism designed to control the DC component of the developing bias The AE mechanism enables production of copies free of fogging as long as the original is more or less uniform in densi...

Page 111: ...hen measuring the density of an original the scanner turns on the scanning lamp and moves to a point 115 mm from the home position At this time the AE sensor reads the level of light reflected by the area shown in Figure 4 112 and sends the AE signal AE to the DC controller PCB In response the DC controller PCB sends the developing DCON signal serial communica tion to the composite power supply PC...

Page 112: ...in a newspaper showing more or less even print Do not use one with many photos or large headings Obtain five sheets of white sheets of paper Check to make sure that the intensity of the scanning lamp has been adjusted when you have replaced the scanning lamp Set the density correction switch SW101 to the middle setting If the machine is not equipped with a density correction switch set the density...

Page 113: ...paper on the copyboard and close the copyboard cover 6 Turn VR102 so that the reading in the indicator is from A3 to Ad Figure 4 118 VR103 VR102 2 While keeping the condition in step 1 turn on the power switch The scanning lamp will turn on an the main motor M1 will rotate 3 Stop shorting JP103 and JP104 4 Turn VR103 on the DC controller PCB fully clockwise ...

Page 114: ...step 5 and make adjustments once again 10 Make a copy and check to make sure that it is free of fogging and the density of its characters is good If it is foggy or the characters are too light go back to step 1 and start over If no change is noted after re adjustment use the density correcting switch SW101 Figure 4 120 VR103 SW101 Lighter Darker 7 Remove the newspaper from the copyboard in its pla...

Page 115: ...educe mode A Position of the side blanking lamp in Direct and Reduce mode B Position of the side blanking lamp in Reduce mode B A G Controlling the Side Blanking Mechanism 1 Outline The machine is equipped with a side blanking lamp at the front and the rear used to prevent adhesion of excess toner when making reduced copies 2 Operations To blank out the non image area in reduce mode the side blank...

Page 116: ...ty 2 Unless otherwise instructed assemble the parts by reversing the steps used to disassemble it 3 Identify the screws by type length diameter and location 4 Use the washers where necessary The screws used to mount the grounding wire and Varis tors come with a washer to ensure electrical continuity 5 As necessary cut the harnessband 6 As a rule do not operate the machine with any of its part remo...

Page 117: ...ridge is fit into the machine and the machine s top unit is closed b Light Blocking Shutter When the cartridge is removed from the machine light makes its way through the opening used to expose images As in the case of the drum cover shutter the light blocking shutter is provided to protect the photosensitive drum from light Cleaning blade Drum cover shutter Developing cylinder Light blocking shut...

Page 118: ...e direction in which it rotates when making copies Otherwise the leaf spring used to apply a developing bias to the develop ing cylinder will develop poor contact 2 If you must clean it use a flannel cloth Do not use paper lint free or otherwise 3 If exposed to light for an appreciable time the images will be affected Be sure to work briskly Reference If the photosensitive drum is exposed to light...

Page 119: ...AU JAPON 4 25 Figure 4 202 1 2 2 3 B Transfer Charging Assembly 1 Removing the Transfer Charging Roller 1 Open the machine s top unit 2 Remove the screw 1 3 While freeing the claw 2 of the bushing detach the transfer charging roller 3 Caution Do not touch the surface of the roller Be sure the surface is free of dirt ...

Page 120: ...er and select a default ratio of 141 Press the Copy Start key When the lens has moved to the farthest left turn off the power Disconnect the power plug 2 Remove the front lower cover See Chapter 7 III A 2 Removing the Front Lower Cover 3 Remove the cartridge 4 Remove the DC controller PCB See Chapter 7 III E 1 Removing the DC controller PCB 5 Remove the composite power supply PCB See Chapter 7 III...

Page 121: ...chine s top unit farther and hold it in place using the handle of a screwdriver about 30 mm in diameter 8 Remove the four screws 3 and discon nect the connector 4 then detach the blanking exposure unit 5 Caution When mounting the blanking exposure unit check to make sure that the blank ing exposure unit PCBs are at the ex treme ends and that the lens is positioned at the farthest left 141 position...

Page 122: ......

Page 123: ...d mechanical units and in relation to their timing of operation It also shows how these units may be disassembled assembled and adjusted I PICKUP FEEDING SYSTEM 5 1 A Outline 5 1 B Controlling the Pickup Roller 5 3 C Controlling the Movement of Paper 5 9 D Detecting Jams 5 12 II DISASSEMBLY ASSEMBLY 5 18 A Pickup Assembly 5 19 B Multifeeder Assembly 5 28 C Single feeder Assembly 5 31 D Feeding Ass...

Page 124: ......

Page 125: ...using a center reference method in which paper is moved in the middle of the pickup feeding path and is equipped with a cassette multifeeder and single feeder as the source of paper From the cassette multifeeder or single feeder copy paper is picked up and is controlled by the registration roller so that its leading edge will match the leading edge of the image on the photosensitive drum it is the...

Page 126: ...DC controller PCB Registration roller Delivery paper detection signal DPD Pre registration roller paper detection signal RPD Vertical path roller paper detection signal PDP Single feeder pickup roller Vertical path roller Q751 PS4 PS5 Static eliminator Photosensitive drum Holding plate Cassette Copy tray Fixing assembly Delivery roller PS3 DC controller PCB Registration roller Delivery paper detec...

Page 127: ...aw moves away from the control ring allow ing the drive to move to the pickup gear assembly through the spring clutch Then when the cas sette pickup solenoid turns on the drive reaches the cassette pickup roller When the cassette pickup roller starts to rotate copy paper is picked up from the cassette and is sent as far as the registration roller by way of the vertical path roller The registration...

Page 128: ...feeder type M1 SL1 SL5 Cassette pickup solenoid drive signal CPUSD Pickup clutch solenoid drive signal PUSLD DC controller PCB Copy paper Pickup clutch Arm Cassette pickup rollers Spring Pickup roller Pickup roller gear Gear When SL5 turns on the spring causes the pickup roller to rotate slightly causing the gear and the pickup roller gear to engage ...

Page 129: ...assette pickup solenoid SL5 turns on once again about 1 3 sec after the pickup clutch solenoid SL1 turns on Figure 5 105 3 Re Pickup cassette pickup If the vertical path roller paper sensor PS4 does not detect copy paper within a specific period of time after the cassette pickup roller has started to rotate the pickup roller is rotated once again to execute pickup operation thereby ensuring correc...

Page 130: ...trol ring pickup clutch sole noid SL1 gear unit and multifeeder pickup solenoid SL4 When the multifeeder pickup solenoid SL4 turns on the drive of the main motor M1 reaches the cam gear When the cam gear starts to rotate in response the lifter which is in contact with the cam moves up the gear unit and at the same time pushes down the paper guide plate The cam gear makes a 180 turn approximate and...

Page 131: ...oller is controlled by the pickup clutch solenoid SL1 and the single feeder paper sensor PS5 When copy paper is inserted into the single feeder the single feeder paper sensor turns on and the main motor starts to rotate The drive of the main motor reaches the signal feeder pickup roller through a gear When the single feeder pickup roller starts to rotate copy paper is picked up from the signal fee...

Page 132: ... Mode The machine does not possess a copy paper width detecting function and therefore the tem perature of the ends of the fixing assembly increases when copies are made continuously on paper narrower than A4 LTR When the multifeeder is used for continuous copying a delay is initiated after picking up the 19th sheet so as to increase the sheet to sheet distance for the sheets that follow controlli...

Page 133: ... the Movement of Paper 1 Controlling the Registration Roller The registration roller is controlled by a spring clutch control ring pre registration roller paper sensor Q751 and registration clutch solenoid SL2 The microprocessor on the DC controller PCB turns on the registration clutch solenoid at a specific timing in response to the paper detection signal from the pre registration roller paper se...

Page 134: ... II Pickup clutch solenoid SL1 Cassette pickup solenoid SL5 Vertical path roller paper sensor PS4 Pre registration roller paper sensor Q751 Registration clutch solenoid SL2 I STBY INTR SCFW SCRV LSTR STBY Main motor M1 Single feeder paper sensor PS5 Pre registration roller paper sensor Q751 Registration clutch solenoid SL2 Scanner Delivery sensor PS3 Copy paper in ON Forward Reverse 0 3sec approx ...

Page 135: ...oid SL4 Pickup clutch solenoid SL1 Pre registration roller paper sensor Q751 Registration clutch solenoid SL2 I Varied by value under 30 of service mode registration adjustment II Used for measuring the length of copy paper length of copy paper mm 96 mm s II s 11 mm 10 mm 96 mm s speed at which copy paper is moved 11 mm distance between pre registration roller paper sensor and registration roller ...

Page 136: ...e presence absence of copy paper and whether copy paper is moving properly Vertical path roller paper sensor PS4 Single feeder paper sensor PS5 Pre registration roller paper sensor Q751 Delivery sensor PS3 The presence absence of a jam is checked with reference to the presence absence of paper over a specific sensor at such times as programmed in the microprocessor The machine is not equipped with...

Page 137: ...n motor in about 1 5 sec and indicate the Add Paper message If the pre registration roller paper sensor detects copy paper during this 1 5 sec period ap proximate the machine will identify the condition as a pickup delay jam and flash the Jam indica tor Figure 5 115 normal Figure 5 116 no paper Copy Start key ON STBY INTR SCFW Pickup clutch solenoid SL1 Jam check Pre registration roller paper sens...

Page 138: ...mal Figure 5 117 jam 2 Absence of Paper in the Cassette Pickup Assembly When re pickup operation is executed from the cassette the absence of paper will be identi fied if copy paper doesnot reach the vertical path roller paper sensor within a specific period of time In responce the machine will stop the main motor in about 1 5 sec and indicate the Add Paper message Copy Start key ON STBY INTR SCFW...

Page 139: ...py paper inserted STBY INTR SCFW Single feeder paper sensor PS5 Jam check Pre registration roller paper sensor Q751 Main motor M1 5 1 sec Jam 1 5 sec 3 Single feeder Pickup Delay Jam After being detected by the single feeder paper sensor if copy paper does not reach the pre registration roller sensor within a specific period of time the machine will identify the condition as a single feed pickup d...

Page 140: ...CRV SCFW SCRV Vertical path roller paper sensor PS4 Jam check Main motor M1 Pre registration roller paper sensor Q751 1 5sec Jam 2 6sec Normal 2 6sec indication 5 Registration Paper Delay Jam After reaching the vertical path roller paper sensor if copy paper fails to reach the pre registra tion roller paper sensor within a specific period of time the machine will identify the condition as a regist...

Page 141: ...diately and flash the Jam indicator Copy Start key ON STBY INTR SCFW Registration clutch solenoid SL2 Jam check Delivery sensor PS3 Main motor M1 4 1sec normal SCRV SCFW 4 1sec indication Jam 1 5sec 7 Delivery Delay Jam If copy paper does not reach the delivery sensor within a specific period of time because of feeding faults the machine will identify the condition as a delivery delay jam stop the...

Page 142: ...ty 2 Unless otherwise instructed assemble the parts by reversing the steps used to disassemble it 3 Identify the screws by type length diameter and location 4 Use the washers where necessary The screws used to mount the grounding wire and Varis tors come with a washer to ensure electrical continuity 5 As necessary cut the harnessband 6 As a rule do not operate the machine with any of its part remo...

Page 143: ... 3 A Pickup Assembly 1 Removing the Pickup Roller 1 Pull out the cassette 2 Remove the front lower cover See Chapter 7 III A 2 Removing the Front Lower Cover 3 Open the machines top unit farther and hold it in place with the handle of a screw driver about 30 mm in diameter 4 Remove the screw 1 and free the two claws 2 then detach the feeding assem bly cover 3 ...

Page 144: ... 4 5 6 7 9 8 5 While pulling the guide plate 4 of the cassette pickup solenoid in the direction of the arrow turn the gear 5 slightly in the direction of the arrow to disengage the guide plate 4 and the gear 6 6 While pulling the plunger 7 of the pickup solenoid turn the gear 8 in the direction of the arrow so that the pickup roller 9 is oriented as shown ...

Page 145: ...le to remove the pickup roller 11 Caution When removing the pickup roller be sure to push the claw while holding the shaft in place so as to prevent the pickup roller shaft from freeing itself Caution When mounting the multifeeder unit perform the next steps first 1 Turn on the power switch then se lect the multifeeder and press the Copy Start key 2 When the pickup gear unit has moved up as far as...

Page 146: ...ing the Pickup Clutch single feeder type 1 Remove the front lower cover See Chapter 7 III A 2 Removing the Front Lower Cover 2 Remove the registration roller unit See E 1 Removing the Registration Roller Unit 3 Open the machine s top unit and hold it in place using the handle of a screwdriver about 30 mm in diameter 4 Disconnect the connector 1 and remove the screw 2 then detach the solenoid unit ...

Page 147: ...D IN JAPAN IMPRIME AU JAPON 5 23 Figure 5 209 Figure 5 210 Figure 5 211 5 6 5 4 8 7 6 9 10 11 5 Remove the screw 4 and the two claws 5 and detach the gear unit 6 6 Free the claw 7 of the gear unit 6 and detach the clutch unit 8 7 Remove the E ring 9 and the washer 10 and detach the pickup clutch 11 ...

Page 148: ...multifeeder type 1 Remove the front lower cover See Chapter 7 III A 2 Removing the Front Lower Cover 2 Remove the registration roller unit See E 1 Removing the Registration Roller Unit 3 Open the machine s top unit farther and hold it in place with the handle of a screw driver about 30 mm in diameter 4 Disconnect the two connectors 1 and remove the two screws 2 then detach the solenoid unit 3 ...

Page 149: ...HT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 5 25 Figure 5 214 Figure 5 215 4 4 5 6 7 5 While freeing the two claws 4 remove the pickup clutch unit 5 6 Remove the E ring 6 and detach the pickup clutch 7 ...

Page 150: ... 216 Figure 5 217 1 2 3 3 Removing the Vertical Path Roller 1 Remove the front lower cover See Chapter 7 III A 2 Removing the Front Lower Cover 2 Open the machine s top unit farther and hold it using the handle of a screwdriver about 30 mm in diameter 3 Remove the screw 1 and free the two claws 2 then detach the feeding assem bly cover 3 ...

Page 151: ... 5 PICK UP FEEDING SYSTEM COPYRIGHT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 5 27 Figure 5 218 4 5 4 While lifting the sensor lever 4 remove the vertical path roller 5 ...

Page 152: ...ing the Multifeeder Unit 1 Open the right door 2 Remove the two screws 1 and detach the multifeeder unit 2 Caution When mounting the multifeeder unit perform the following first 1 Turn on the power switch then se lect the multifeeder and press the Copy Start key 2 When the pickup gear unit has moved as far as it can turn off the power switch 3 Mount the multifeeder unit then make a copy using the ...

Page 153: ... Figure 5 221 Figure 5 222 Figure 5 223 2 1 1 3 4 6 5 2 Removing the Multifeeder Pickup Roller 1 Remove the multifeeder unit See 1 Removing the Multifeeder Unit 2 Free the claw 1 and remove the gear 2 and the bushing 3 3 Remove the multifeeder pickup roller unit 4 4 While freeing the claw 5 detach the multifeeder pickup roller 6 ...

Page 154: ...5 3 Removing the Separation Pad 1 Remove the multifeeder pickup roller to gether with its shaft See 2 Removing the Multifeeder Pickup Roller 2 Remove the multifeeder tray 3 Slide the side guide 1 to the inside about 3 cm and free the two claws 2 then de tach the holding plate 3 4 Push up the separation pad 4 and pull it out by pushing the shaft 5 toward the in side ...

Page 155: ...oor 2 Remove the two screws 1 and remove the single feeder unit 2 Figure 5 227 Figure 5 228 2 Removing the Single feeder Pickup Roller 1 Remove the single feeder unit See 1 Removing the Single feeder Unit 2 Push up the stopper lever 1 and move the gear 2 of the single feeder pickup roller assembly in the direction of the ar row 3 Remove the single feeder pickup roller assembly 4 together with the ...

Page 156: ...FEEDING SYSTEM COPYRIGHT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 5 32 Figure 5 229 3 5 6 4 Free the claw 5 of the paper guide plate 3 and remove the single feeder pickup roller 6 ...

Page 157: ...INTED IN JAPAN IMPRIME AU JAPON 5 33 Figure 5 230 Figure 5 231 2 1 3 3 3 3 3 3 4 4 4 4 5 5 5 D Feeding Assembly 1 Detaching the Feed Belt 1 Open the machine s top unit 2 Push down the stopper 1 and remove the gear 2 3 While freeing the claw 3 detach the four shafts 4 then detach the feed belt 5 ...

Page 158: ...999 PRINTED IN JAPAN IMPRIME AU JAPON 5 34 Figure 5 233 3 2 2 Figure 5 232 1 1 E Registration Roller Assembly 1 Removing the Registration Roller Unit 1 Open the machine s top unit 2 Remove the spring 1 front rear 3 Remove the two bushings 2 and remove the registration roller lower unit 3 ...

Page 159: ...stration Roller Clutch 1 Remove the registration roller unit See 1 Removing the Registration Roller Unit 2 Remove the bushing 1 and the E ring 2 3 While shifting down the registration roller 3 detach it from the gear unit 4 Figure 5 236 4 Remove the E ring 5 and detach the registration roller clutch 6 Caution The clutch has a pin Take care not to lose it when removing the clutch 5 6 ...

Page 160: ...Figure 5 237 Figure 5 238 1 3 3 2 4 5 6 F Delivery Assembly 1 Removing the Delivery Roller 1 Remove the fixing lower roller See Chapter 6 II A 3 Removing the Fix ing Lower Roller 2 Remove the two screws 1 and detach the side plate 2 and the four gears 3 3 Remove the screw 4 and free the two hooks 5 then detach the sensor holder 6 ...

Page 161: ...IGHT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 5 37 Figure 5 239 Figure 5 240 4 Remove the two bushings 7 5 While shifting the delivery lower guide 8 toward the rear detach the delivery roller 9 7 8 9 ...

Page 162: ......

Page 163: ...les used to fuse toner images to transfer medium in view of the functions of electrical and mechanical units and in relation to their timing of operation It also shows how these units may be disassembled assembled and adjusted I OPERATIONS 6 1 A Outline 6 1 B Controlling the Fixing Temperature 6 3 II DISASSEMBLY ASSEMBLY 6 10 A Fixing Assembly 6 11 ...

Page 164: ......

Page 165: ...otor M1 Flat heater Thermistor TH1 Cleaning roller The following are used to detect and protect against an error upon detection power to the fixing heater will be cut Thermistor TH1 Thermal fuse FU2 activating at 228 C E000 The fixing temperature fails to increase E001 The thermistor has detected overheating E002 Fault in fixing power control E003 The fixing temperature has dropped abnormally I OP...

Page 166: ...gure 6 101 Figure 6 102 Cleaning roller Fixing lower roller Fixing thermistor TH1 Thermal fuse 2 FU2 Fixing film Fixing heater H1 M1 Fixing thermistor signal TH1 DC controller PCB Composite power supply PCB Main motor Fixing lower roller Cleaning roller Fixing film Fixing heater H1 Thermal fuse 2 FU2 Fixing thermistor TH1 ...

Page 167: ...H1 which sends the fixing thermistor signal TH1 to the microprocessor Q101 on the DC controller PCB in response the microprocessor controls the fixing heater duty signal HEAT_PWM to vary the power supplied to the heater by way of controlling the temperature of the fixing heater Figure 6 103 DC controller PCB HEAT_TRG HEAT_OFF Micro processor 5V Auxiliary power supply 5V Relay RL601 Thermal fuse 2 ...

Page 168: ...witched according to the following two parameters Temperature of the fixing heater when the Copy Start key is pressed Number of copies to make in continuous copying mode Table 6 102 shows the temperature of the fixing heater when the Copy Start key is pressed as detected by the thermistor TH1 and the temperatures to which the fixing heater is controlled ac cording to the number of copies made in c...

Page 169: ...49 50 59 60 1 9 10 19 20 29 30 39 40 1 9 10 19 20 Control temperature C 200 195 190 185 180 175 170 190 186 180 175 170 180 175 170 1 2 3 Figure 6 104 Power switch ON Copy Start key ON Copy Start key ON Copying end STBY STBY Copying Copying STBY Main motor M1 Fixing heater H1 Number of Copies in Continuous Copying Mode after a Press on the Copy Start Key Controlling the Temperature of the Fixing H...

Page 170: ...l of resistance of the fixing heater is selected by an appropriate combination of the jumper wires connected to the connector of the fixing thermistor TH1 and the delivery sensor PS3 The best level is selected at the factory when the fixing assembly is assembled Do not change the combination of jumper wires HEAT_PWM Power supplied to the heater 3 Controlling the Temperature Supplied to the Fixing ...

Page 171: ...verheating of the copyboard the temperature of the fixing lower roller tends to increase because of the increased sheet to sheet distance To prevent possible problems power to the fixing heater is stopped between sheets when the copying speed is controlled to 6 cpm Switching to 6 cpm copying speed SCRV SCFW SCRV LSTR STBY Registration clutch solenoid SL2 Fixing heater H1 Scanner Delivery sensor PS...

Page 172: ...is turned on within 5 min not recognizing a press on the Copy Start key If the Copy Start key is pressed after about 5 min however a press on the Copy Start key will be recognized If an error is detected in relation to the heater during copying operation the machine will indicate E000 through E003 in the control panel once again and turn off the power Related Error Code E000 The temperature detect...

Page 173: ...ON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 6 9 b Thermal Fuse FU2 If the temperature around the thermal fuse exceeds 228 C and remains so for a specific period of time the thermal fuse will blow to cut the power to the fixing heater ...

Page 174: ...Unless otherwise instructed assemble the parts by reversing the steps used to disassemble it 3 Identify the screws by type length diameter and location 4 Use the washers where necessary The screws used to mount the grounding wire and Varis tors come with a washer to ensure electrical continuity 5 As necessary cut the harness band 6 As a rule do not operate the machine with any of its part removed ...

Page 175: ...ler 5 Cleaning roller A Fixing Assembly 1 Construction Caution 1 The fixing film is made from a spe cial material Do not touch it or sub ject it to dust 2 The machine does not have a mecha nism used to adjust the roller pres sure 2 Removing the Fixing Assembly 1 Remove the front lower cover See Chapter 7 III A 2 Removing the Front Lower Cover 2 Remove the screw 1 and free the two hooks 2 then deta...

Page 176: ... AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 6 12 Figure 6 203 Figure 6 204 5 4 8 6 7 3 Remove the screw 4 and disconnect the connector 5 4 Remove the two screws 6 and discon nect the connector 7 then detach the fixing assembly 8 by turning it in the di rection of the arrow ...

Page 177: ...Roller 1 Remove the fixing assembly See 2 Removing the Fixing Assem bly 2 Remove the two screws 1 and free the two hooks 2 then detach the fixing up per stay 3 by turning it in the direction of the arrow 3 Detach the harness band 4 from the side plate and remove the fixing upper unit 5 Caution Do not disassemble the fixing film and the fixing heater They cannot be re placed on their own ...

Page 178: ...INTED IN JAPAN IMPRIME AU JAPON 6 14 4 Removing the Cleaning Roller 1 Remove the fixing lower roller See 3 Removing the Fixing Lower Roller 2 Remove the cleaning roller 1 together with the bushing Figure 6 208 1 Figure 6 207 6 4 Remove the fixing lower roller 6 to gether with the gear ...

Page 179: ...d mechanical units and in relation to their timing of operation It also shows how these units may be disassembled assembled and adjusted I FANS 7 1 II POWER SUPPLY SYSTEM 7 3 A Outline of the Power Supply System 7 3 B Power Supply Circuit 7 4 C Detecting an Error on the Composite Power Supply PCB 7 6 D Protecting the Power Supply Circuit 7 6 III DISASSEMBLY ASSEMBLY 7 7 A External Covers 7 8 B Con...

Page 180: ......

Page 181: ...APAN IMPRIME AU JAPON 7 1 Figure 7 101 Heat exhausting fan FM1 I FANS The machine is equipped with two fans serving to discharge ozone or cool its inside The heat exhaust fan is driven directly by the main motor M1 through a belt and a gear and is designed to rotate at all times while the main motor is rotating ...

Page 182: ...eat exhausting fan I SCRV Power switch ON Copy Start key ON The scanner cooling fan FM1 is turned on and off according to the temperature detected by the scanner thermistor TH2 If the reading by the thermistor is 37 5 C or higher and the copying speed reaches 6 cpm the fan starts to rotate If the reading is lower than 37 5 C on the other hand the fan will not rotate if no more than one copy is mad...

Page 183: ...00 Main transformer T101 Fixing heater control circuit DC power supply circuit Scanning lamp control circuit High voltage power supply circuit 24VR 24VU 5V 5V 24VR 24VU 24VU 24VU Control panel AE sensor 5V Sensor To ADF Solenoid Scanner lens drive motor M2 Blanking lamp 24VU 24VU Scanner cooling fan M1 Main motor main motor driver PCB Fixing heater Primary charging roller Scanning lamp Developing ...

Page 184: ...e power switch on the control panel is turned on In response the DC power supply provides the DC controller PCB with 5 V 24 VR and 24 VU When the power switch is turned off the power to the DC controller PCB is cut off To back it up against E000 E001 E002 and E003 the machine is equipped with a DC capacitor as part of the DC controller circuit When E000 E001 E002 or E003 occurs the capacitor C123 ...

Page 185: ...800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 7 5 Figure 7 202 Door switch DS1 Auxiliary power supply Relay RL601 FU102 5V Microprocessor Q900 C123 Power switch SW309 Control panel DC controller PCB Power supply Main transfor mer T101 DC power supply 5V 24VR 24VU ...

Page 186: ...etected in any of the following voltages the composite power supply will indicate E064 on the control panel Primary charging DC bias Developing DC bias Transfer bias 3 Detecting a Fault in the Low Voltage Control Value If a deviation is detected between the setting value and the actual control value in 24 V DC output the composite power supply PCB will indicate E803 on the control panel 4 Fault in...

Page 187: ...safety 2 Unless otherwise instructed assemble the parts by reversing the steps used to disassemble it 3 Identify the screws by type length diameter and location 4 Use the washers where necessary The screws used to mount the grounding wire and Varis tors come with a washer to ensure electrical continuity 5 As necessary cut the harness band 6 As a rule do not operate the machine with any of its part...

Page 188: ...00s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 7 8 Figure 7 301 Copyboard type 2 1 3 6 4 5 7 1 Copyboard cover 2 Top cover 3 Control panel 4 Front lower cover 5 Cassette 6 Front upper cover 7 Left cover A External Covers For instructions on how to remove the ADF see Chapter 8 ...

Page 189: ...DF 2 Top cover 3 Control panel 4 Front lower cover 5 Cassette 6 Front upper cover 7 Left cover 2 1 3 6 4 5 7 1 3 2 1 Rear cover 2 Right door 3 Multifeeder unit Note Remove the covers as necessary when cleaning inspecting or repairing the in side of the machine Those covers that may be detached from their own by mere removal of mounting screws are omitted from the discussions ...

Page 190: ...305 1 1 2 3 3 4 1 Removing the Top Cover 1 Remove the copyboard cover or the ADF 2 Open the machine s top unit 3 Remove the two screws 1 and detach the front upper cover 2 Caution A flexible cable for the control panel is connected to the front upper cover Dis connect the cable from the DC control ler 4 Free the two claws 3 and slide the left cover 4 to detach ...

Page 191: ...NON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 7 11 Figure 7 306 Figure 7 307 5 6 7 8 9 5 Remove the screw 5 and free the four claws 6 then detach the rear cover 7 6 Remove the screw 8 and detach the copyboard cover foot retainer 9 ...

Page 192: ... EXTERNALS AUXILIARY MECHANISMS COPYRIGHT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 7 12 Figure 7 308 10 11 10 7 Free the two claw 10 then lift the top cover 11 to detach ...

Page 193: ...e 7 310 2 Removing the Front Lower Cover 1 Open the right door 2 Remove the two screws 1 and detach the multifeeder unit 2 or the single feeder unit 3 Open the machine s top unit 4 Remove the two screws 3 and detach the front upper cover 4 Caution A flexible cable for the control panel is connected to the front upper cover Dis connect the cable from the DC control ler ...

Page 194: ...und at the bottom of the ma chine 6 While freeing the five claws 6 detach the front lower cover 7 Caution When mounting the multifeeder unit be sure to perform the following first 1 Turn on the power switch then se lect the multifeeder as the source of paper and press the Copy Start key 2 When the pickup gear unit assembly has moved to its upper limit turn off the power switch 3 Mount the multifee...

Page 195: ...6 3 7 B Control Panel 1 Removing the Control Panel 1 Open the machine s top unit 2 Remove the two screws 1 and detach the front upper cover 2 Caution A flexible cable for the control panel is connected to the front upper cover Dis connect the cable from the DC control ler 3 Free the claw 3 and remove the power supply switch assembly 4 Move the copy density adjusting lever 5 to the far thest right ...

Page 196: ...unding plate Copyboard glass C Copyboard Glass 1 Removing the Copyboard Glass 1 Remove the top cover See A 1 Remov ing the Top Cover 2 Close the machine s top unit 3 Remove the two screws 1 and detach the two support plates 2 then detach the copyboard glass 3 Note When mounting the copyboard glass be sure that the grounding plate is on the side of its top edge ADF type only ...

Page 197: ...MPRIME AU JAPON 7 17 Figure 7 318 Figure 7 319 1 2 3 D Main Motor Main Drive Assembly 1 Removing the Main Motor Unit 1 Remove the drum cartridge 2 Remove the composite power supply PCB See E 2 Removing the Composite Power Supply PCB 3 Remove the screw 1 and detach the high voltage PCB 2 4 Remove the insulating sheet 3 ...

Page 198: ...RINTED IN JAPAN IMPRIME AU JAPON 7 18 Figure 7 321 5 5 6 4 Figure 7 320 5 Detach the fan belt 4 6 Remove the four screws 5 and detach the main motor unit 6 Caution When installing the main motor unit be sure to attach the fan belt After attaching the fan belt make sure that the belt is free of twists ...

Page 199: ...TED IN JAPAN IMPRIME AU JAPON 7 19 Figure 7 322 Figure 7 323 1 2 3 2 Removing the Main Drive Assem bly 1 Remove the drum cartridge 2 Remove the composite power supply PCB See E 2 Removing the Composite Power Supply PCB 3 Remove the screw 1 and detach the high voltage PCB 2 4 Remove the insulating sheet 3 ...

Page 200: ...ED IN JAPAN IMPRIME AU JAPON 7 20 Figure 7 324 Figure 7 325 4 5 5 6 5 Detach the fan belt 4 6 Remove the five screws 5 and detach the main drive assembly 6 Caution When installing the main drive assem bly be sure to attach the fan belt After attaching the fan belt make sure that the belt is free of twists ...

Page 201: ...l System 1 Removing the DC Controller PCB 1 Open the machine s top unit 2 Remove the screw 1 and detach the front upper cover 2 Caution A flexible cable for the control panel is connected to the front upper cover Dis connect the cable from the DC control ler 3 Disconnect all connectors from the DC controller PCB remove the screw 3 and free the six claws 4 then detach the DC controller PCB 5 ...

Page 202: ...28 Figure 7 329 1 2 3 3 3 4 2 Removing the Composite Power Supply PCB 1 Remove the copyboard cover or the ADF 2 Remove the left cover and the rear cover 3 Remove the screw 1 and remove the copyboard cover foot retainer 2 4 Disconnect the ten connectors 3 from the composite power supply PCB and disconnect the connector 4 from the main motor assembly ...

Page 203: ... MECHANISMS COPYRIGHT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 7 23 5 Remove the seven screws 5 and free the five claws 6 then detach the composite power supply PCB 7 Figure 7 330 5 5 5 6 7 ...

Page 204: ...tors on the composite power supply hold charges when the machine s power supply is off Take extra care never to short the termi nals of the capacitor whenever you have removed the composite power supply PCB 2 When handling the PCB hold its heat ra diating plate at the center or its both edges In particular keep in mind that holding the area indicated by can cause deformation or cracking of the boa...

Page 205: ...2 C Basic Operations 8 4 D Detecting an Original 8 6 E Pickup Operation 8 8 F Delivery 8 12 G Controlling the Pickup Motor 8 14 H Controlling the Belt Motor 8 15 I Detecting Original Jams 8 16 J Power Supply 8 17 II DISASSEMBLY ASSEMBLY 8 18 A Removing the ADF 8 19 B External Covers 8 21 C Drive System 8 23 D Feeding System 8 26 E Electrical System 8 33 ...

Page 206: ......

Page 207: ...IN JAPAN IMPRIME AU JAPON 8 1 I ADF A Outline The ADF picks up the originals stacked on the original tray starting with the topmost original moves them through the copyboard and delivers them See Figure 8 101 for an outline of the feeding route Figure 8 101 ADF Original tray Copier ...

Page 208: ...e signals from the sensors and the copier and generates signals to drive the motor at such times as programmed in advance The copying modes selected on the copier are communicated to the ADF in serial and the ADF communicates to the copier the state of feeding originals to the copier in serial It does not use an IC for communications Figure 8 102 Serial communication Copier Composite power supply ...

Page 209: ...ment sensor Delivery sensor PI1 J105 J6 1 2 ADF controller PCB J5 1 J5 4 J5 7 3 2 6 5 9 8 J3 1 2 24V MS1 ADFC When ADF is opened 1 PDP1 When original is detected 1 when light blocking plate is at sensor 5V 5V 5V PDP2 When original is detected 0 when light blocking plate is at sensor PDP3 When original is detected 0 when light blocking plate is at sensor See p 8 15 M1 M2 Pickup motor Belt motor 3 4...

Page 210: ... belt motor M1 is used to move stop and deliver originals Further the ADF is equipped with three sensors for monitoring the movement of originals The ADF is designed to accommodate one sided original copying mode only Figure 8 104 PI2 PI1 PI3 Belt motor drive signal Pickup motor drive signal Registration paper detection signal PDP2 J5 6 J5 9 J5 3 Pick up paper detection signal PDP3 Delivery paper ...

Page 211: ...ginals stacked on the original tray starting with the topmost original after it picks up an original it places it on the copyboard glass for copying moves it away from the copyboard glass and delivers it to the copyboard glass Figure 8 105 Placing originals Picking up an original Feeding 1 Feeding 2 Copying Delivering Original tray Delivery tray Originals ...

Page 212: ...gth of the Original Checks the length of the original placed on the original tray 3 Detecting the Presence Absence of an Original The original placement sensor PI3 is used to check the presence absence of an original When an original is placed on the original tray the original placement sensor PI3 sends the original detection signal PDP3 to the ADF controller PCB in response to the movement of the...

Page 213: ...inal to move past the registration paper sensor PI2 Using the result of the computation the ADF controller determines whether the size of the original is A4 LTR or smaller or LGL thereby switching to the appropriate ADF operation Table 8 101 shows the lengths of originals that determines ADF operation sequence Figure 8 107 Table 8 101 Original Lengths and Operation Sequences Length 313cm 314cm Seq...

Page 214: ...inal tray i e the original placement sensor PI3 turns ON the pickup roller rotates counterclockwise and the paper guide holds the original in place Figure 8 108 2 Pickup Separation When the Copy Start key is pressed the pickup roller 1 and 2 rotate clockwise and pick up the first original topmost and forward it as far as the registration roller The separation pad ensures that only one original is ...

Page 215: ...ading edge of the first original comes into contact with the delivery sensor PI1 In the case of a LGL original the original is moved about 15 mm farther after it has come into contact with the delivery sensor At the same time the pickup motor M2 is rotated counterclockwise to prepare for picking up the second original Figure 8 111 Figure 8 112 1st original Arching Registration roller PI1 Delivery ...

Page 216: ...er and Picking Up the Second Original The scanner starts to move forward after the original has been stopped at a specific location on the copyboard glass If the original is A4 LTR or smaller the pickup motor M2 is also rotated clockwise to pickup the second original and butt it against the registration roller If the original is LGL the second original is picked up after the scanner has been moved...

Page 217: ...r M1 Original detection sensor PI3 Registration sensor PI2 Delivery sensor PI1 motor CCW rotation Picking up separating Arching Preparing for pickup of 2nd original Feeding 1 Feeding 2 Copying Picking up 2nd original Original set Copy Start key ON Preparing for pickup Pickig up Pickup motor M2 Belt motor M1 Original detection sensor PI3 Registration sensor PI2 Delivery sensor PI1 motor CCW rotatio...

Page 218: ... to feed and deliver the first original on the copyboard glass At the same time the pickup motor M2 moves the second original to the copyboard glass Figure 8 117 2 Delivering to the Delivery Tray The ADF switches the belt motor to low speed as soon as the trailing edge of the original moves past the delivery sensor PI1 thereby delivering the original slowly Figure 8 118 2nd original 1st original 2...

Page 219: ...y sensor PI1 motor CCW rotation Picking up separating 1st original Copying picking up separating 2nd original Delivering 1st original picking up 2nd original Copying Delivering Detecting length motor low speed rotation Original set Copy Start key ON Pickup motor M2 Belt motor M1 Original detection sensor PI3 Registration sensor PI2 Delivery sensor PI1 motor CCW rotation Delivering 1st original pic...

Page 220: ...s for each combination The motor driver is equipped with a limiter function preventing overcurrent from flowing into the motor When an overcurrent occurs the limiter function cuts off the motor drive current thereby preventing damage to the motor When the limiter function is activated the pickup motor cannot rotate as controlled possibly leading to pickup faults Any pickup fault causes the ADF con...

Page 221: ...signals MA MA MB MB used for driving the motor to rotate the belt motor clockwise or counterclockwise The motor driver is equipped with a limiter function used to keep the motor supplied with a specific current so that current greater than specified will not flow If loads large enough to activate the limiter function occur in succession the belt motor cannot rotate as specified possibly leading to...

Page 222: ...or before the registra tion sensor PI2 turns on When the 1st original is picked up the registra tion sensor PI2 and the delivery sensor PI1 turn on When separation starts the registration sensor PI2 or the delivery sensor PI1 are on When separation starts the registration sensor PI2 does not turn on after 2 sec When pickup starts the registration sensor PI2 does not turn off after feeding the orig...

Page 223: ...24V supply is cut off when the ADF is opened i e when the ADF switch MS1 turns off The 5V supply will continue to keep each sensor powered even when the ADF is opened Figure 8 124 Logic Circuitbreaker CB1 Copier ADF controller PCB Fuse resistor R1 24V 5V J1 3 J1 1 J6 2 J6 1 COM NO Delivery sensor PI1 Belt motor M1 Pickup motor M2 ADF switch MS1 Composite power supply PCB J101 1 J101 3 Registration...

Page 224: ...s otherwise instructed assemble the parts by reversing the steps used to disassemble it 3 Identify the screws by type length diameter and location 4 Use the washers where necessary The screws used to mount the grounding wire and Varis tors come with a washer to ensure electrical continuity 5 As necessary cut the harness band 6 As a rule do not operate the machine with any of its part removed 7 A f...

Page 225: ...g the ADF 1 Open the machine s top unit 2 Free the two claws 1 and slide the left cover 2 to detach 3 Remove the screw 3 and free the four claws 4 then the detach the rear cover 5 4 Close the machine s top unit 5 Remove the two screws 6 and remove the fixing plate 7 Figure 8 201 Figure 8 202 Figure 8 203 1 1 2 3 4 5 6 7 ...

Page 226: ...s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 8 20 Figure 8 204 Figure 8 205 11 11 6 Disconnect the two connectors 8 and remove the screw 9 then remove the cable bush 10 7 Remove the two lockpin 11 and remove the ADF from the copier 8 10 9 8 ...

Page 227: ...ME AU JAPON 8 21 B External Covers Remove the covers as follows when cleaning checking or repairing the inside of the machine 1 Remove the ADF from the copier See A Removing the ADF 2 Remove the feeding roller 1 from the bushing 2 1 Upper cover 2 Lower cover Figure 8 206 Figure 8 207 1 2 1 2 1 2 ...

Page 228: ...N PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 8 22 3 Remove the six screws 3 and separate the lower cover 4 from the upper cover 5 4 Disconnect the connector 6 and remove the lower cover 4 Figure 8 208 Figure 8 209 3 4 5 3 3 4 6 ...

Page 229: ...PRINTED IN JAPAN IMPRIME AU JAPON 8 23 C Drive System 1 Drive Unit 1 Remove the lower cover See B External Covers 2 Remove the screw 1 and the bushing 2 then remove the pickup roller cover 3 3 Remove the E ring 4 and remove the bearing 5 Figure 8 210 Figure 8 211 1 2 3 4 5 ...

Page 230: ...RIME AU JAPON 8 24 4 Remove the timing belt 6 and remove the feeding belt roller 7 by shifting it in the direction of the arrow 5 Remove the five screws 9 and remove the right hinge unit 8 6 Remove the stop ring 10 resin and the bushing 11 Figure 8 212 Figure 8 213 Figure 8 214 6 7 9 9 9 10 11 ...

Page 231: ...COPYRIGHT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 8 25 7 Disconnect the two connectors 12 and remove the five screws 13 then remove the drive unit 14 Figure 8 215 12 13 14 13 ...

Page 232: ...9 PRINTED IN JAPAN IMPRIME AU JAPON 8 26 D Feeding System 1 Pickup Roller 1 Remove the drive unit 1 See C 1 Drive Unit 2 Remove the E ring 2 and remove the shaft 3 then detach the pickup roller 1 4 3 Remove the stop ring 5 Figure 8 216 Figure 8 217 Figure 8 218 1 5 2 3 4 ...

Page 233: ...99 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 8 27 4 Remove the two straight pins 6 and re move the pickup roller 2 8 while moving the cover 7 in the direction of the arrow Figure 8 219 6 6 7 8 ...

Page 234: ...N 8 28 2 Registration Roller 1 Remove the lower cover See B External Covers 2 Remove the link arm 1 from the registra tion roller shaft 2 by turning the link arm 3 While pushing the bushing 3 in the di rection of the arrow pull out the registra tion roller shaft 2 slowly Figure 8 220 Figure 8 221 1 2 2 3 ...

Page 235: ... 29 3 Feeding Belt 1 Remove the lower cover See B External Covers 2 Remove the two tension springs 1 3 Remove the E ring 2 and remove the bearing 3 4 Remove the timing belt 4 and remove the feeding belt drive roller 5 by moving it in the direction of the arrow Figure 8 222 Figure 8 223 Figure 8 224 1 2 3 4 5 ...

Page 236: ...JAPAN IMPRIME AU JAPON 8 30 5 Remove the two equalizer spring 6 and the two feeding belt rolls 7 6 Remove the two screws 9 and remove the delivery sensor unit 8 7 Remove the stop ring 10 made of resin then remove the bushing 11 Figure 8 225 Figure 8 226 Figure 8 227 6 7 6 7 8 9 10 11 ...

Page 237: ...remove the grounding wire 13 then remove the de livery roller unit 14 by moving it in the direction of the arrow 9 Remove the screw 15 and remove the static eliminating brush 16 10 Remove the two E rings 17 then re move the timing belt 18 gear 19 and two bushings 20 Figure 8 228 Figure 8 229 Figure 8 230 12 13 14 15 16 17 18 19 20 20 17 ...

Page 238: ...ON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 8 32 11 Pull out the actuator 21 in the direction of the arrow then remove the feeding belt link roller 22 and remove the feeding belt 23 Figure 8 231 21 22 23 ...

Page 239: ... two screws 2 then remove the ADF controller PCB 3 2 Original Placement Sensor and Registration Paper Sensor Pay attention to the colors of the cables and connectors when connecting the connec tors of the original placement sensor and the registration paper sensor Table 8 201 Figure 8 232 Figure 8 233 1 2 3 2 1 Original placement sensor Registration paper sensor Sensor Original placement sensor Re...

Page 240: ......

Page 241: ...ON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON CHAPTER 9 INSTALLATION I SELECTING A SITE 9 1 II UNPACKING AND INSTALLATION 9 2 A Unpacking and Installation 9 2 B Placing Copy Paper 9 9 III MOVING THE MACHINE 9 12 ...

Page 242: ......

Page 243: ... near water faucets water boilers humidifiers and refrigera tors Avoid areas near sources of fire The site must not be subject to ammonium gas or direct rays of the sun As necessary provide curtains The site must be well ventilated The level of ozone generated by the machine should not affect the health of people around it Some however may find the odor to be rather unpleasant and ventilation is a...

Page 244: ...ore starting to install it A Unpacking and Installation Take out the copier and the attachments from the shipping box and check to make sure that none is missing 1 Cassette Copy tray Power cord ADF auxiliary tray ADF type only User s Manual Manual feed tray for some areas only Language label for cassette included with universal cassette Language label for ADF ADF type only Remove the packaging bag...

Page 245: ...ping attachment 2 You will be storing the shipping attachment 2 inside the machine in step 9 Take out the protective member from the manual feed tray Multifeeder type only Caution This step applies only if the manual feed tray is attached 5 Protective member Attach the manual feed tray that comes with the machine Multifeeder type only Caution This applies only if the manual feed tray comes package...

Page 246: ...hine go to the next step 6 Protective sheet Open the ADF and remove the protective members ADF type only Caution You will need this protective member when relocating the machine Be sure to store it away appropriately Protective members Pull the open close lever found on the left of the machine to open the machine s top unit then remove the two protective members Caution If the protective member is...

Page 247: ...Step Pick the fixing member from the bottom of the top unit and detach it 8 Store the shipping attachments 1 and 2 re moved in steps 3 and 4 in the machine s bot tom unit 9 1 2 Hold the tab of the cartridge and take it out of the machine 10 Holding the cartridge with the warning label facing up shake it several times in both direc tions 90 11 ...

Page 248: ...al Holding the tab pull it straight out in the di rection of the arrow Caution The seal can tear in the middle Do no pull it at an angle 12 Hold the cartridge with the waning label fac ing up and insert it into the machine with care until it stops 13 Push on the marking found on the top of the machine to close it fully 14 Original tray Open the original tray Caution This step applies to the ADF ty...

Page 249: ...ect the power cord to the power cord connector 18 Connect the power plug to the power outlet then turn on the power switch 19 Make sure that the AE and DIRECT indica tors turn on the count ratio indicator indi cates 1 Press the Count Zoom Set key and the Clear Stop key to check that the copy count is correct Press the Default Ratio key to check that different ratios are indicated Check to make sur...

Page 250: ...ll notations on the label attached to the ADF is in English If a non English language is needed select the appropriate label from among those that come with the machine and stick it 22 Place the Test Sheet on the copyboard glass and make copies to see if the operation is cor rect 23 Check to make sure that there is no abnor mal noise Check to make sure that as many copies as specified are made cor...

Page 251: ...de plate as shown and mount it back to suit the size of the copy paper to be used 1 Rear end guide plate Shift down and pull off Turn the fixing lever front rear of the side paper guide plate as shown and unlock the side paper guide plate 2 Fixing lever rear Fixing lever front Slide the side paper guide plate to suit the width of the copy paper to be used then turn the fixing lever as shown to loc...

Page 252: ...ork Checks and remarks Step Place copy paper in the cassette and set the cassette into the machine 4 All text on the label attached to the cassette is English If you need to replace it with a non English label select the appropriate one from among those packaged with the machine and attach it 5 Language label for cassette ...

Page 253: ...t Cassette Take out the cassette from the machine and remove the protective member 1 Slide the rear end paper guide plate as shown to match the size of the paper to be used Caution This step applies to the 500 sheet cassette LTR LGL only 2 Rear end guide plate Place copy paper in the cassette then set the cassette in the machine 3 500 sheet cassette 250 sheet cassette ...

Page 254: ...placing any paper on the manual feed tray 2 The count ratio indicator will indicate Turn off the power switch and disconnect the power plug from the outlet 3 Pull the open close lever found on the left of the machine and open the machine s top unit 4 Take out the shipping attachments 1 and 2 stored in the machine s bottom unit 5 1 2 Detach the copy tray 6 Press down on the marking on the machine s...

Page 255: ...LGL copy paper on the copyboard glass and close the copyboard cover then tape it in place Copyboard type only 10 Raise the ADF Then place two parts used as packaging so that they fit closely around both sides and the front of the ADF as shown in the diagram and secure them with tape ADF type only Gently lower the ADF and secure the main unit by taping in eight places as shown in the diagram ADF ty...

Page 256: ......

Page 257: ...10 MAINTENANCE AND SERVICING I PERIODICALLY REPLACED PARTS 10 1 II DURABLES AND CONSUMABLES 10 1 III SCHEDULED SERVICING 10 1 IV STORING AND HANDLING THE CARTRIDGE 10 2 A Storing the Cartridge with the Packaging Seal Intact 10 2 B Storing and Handling the Cartridge with the Packaging Seal Removed 10 3 ...

Page 258: ...RIME AU JAPON 10 1 I PERIODICALLY REPLACED PARTS The machine does not have parts which must be replaced on a periodical basis II DURABLES AND CONSUMABLES The machine does not have items designated as durables or consumables III SCHEDULED SERVICING The machine does not have any parts which require scheduled servicing ...

Page 259: ... that the environment is as indicated in Table 10 401 in addition keep the following in mind Avoid direct rays of the sun Avoid vibration Do not subject it to impact as by hitting or dropping it Table 10 401 Temperature Humidity Conditions for Storage Temperature between 20 C 4 F and 40 C 104 F Humidity 90 or less between 0 C 32 F and 35 C 95 F between35 C 95 Fand45 C 113 F between 20 C 4 F and 0 ...

Page 260: ...it Be sure that the user stores it in an appropriate storage box for storage 1 Storage after Removing the Packaging Seal a Avoid areas subject to the direct rays of the sun i e near a window Do not keep it in a car for a long time as it will be subjected to an extremely high temperature This applies even if the cartridge is inside a protective box b Avoid areas subjected to high or low temperature...

Page 261: ... or if copies have white spots as when it starts to run out of toner hold the cartridge level and shake it about 90 several times as shown in Figure 10 401 to even out the toner inside If you shake it in a different way the toner can spill out of the developing assembly or the cleaning assembly Figure 10 401 b Do not place the cartridge on its end or turn it over as shown in Figure 10 402 Figure 1...

Page 262: ...the light blocking shutter is pro vided as a means of protection If the drum is exposed to strong light for a long time however copies can start to show white spots or vertical bands Try leaving the machine alone as long as possible if such a problem is noted the memory i e cause of white spots or vertical bands however may not disappear Keep the following in mind Caution 1 Try to work briskly whe...

Page 263: ......

Page 264: ...BLESHOOTING IMAGE FAULTS 11 48 A Making Initial Checks 11 48 B Sample Image Faults 11 52 C Troubleshooting Image Faults 11 53 IV TROUBLESHOOTING MALFUNCTIONS 11 61 A Troubleshooting Malfunctions 11 61 V TROUBLESHOOTING FEEDING PROBLEMS 11 75 A Copy Paper Jam 11 75 B Faulty Feeding 11 78 VI ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS 11 79 A Sensors and Solenoids 11 79 B Switches 11 80 C Lamp Hea...

Page 265: ......

Page 266: ...ivery cover closed fully Is the rated voltage found at the power outlet Is the rated voltage present between J1 1 and 2 J1 is found near the power cord mount Action Connect the plug Close the door or the cover Inform the user that Go to step 6 Rest omitted To find out the cause possible fault of a specific problem see the Cause column If the problem is AC power is absent you may suspect that the p...

Page 267: ...e terminal to which you are expected to connect the positive probe of the meter and the negative probe example J109 1 Connect the positive probe J109 2 Connect the negative probe Is the power plug connected to the power outlet Are the front door and the delivery cover closed firmly Is the rated voltage present at the power source Connect the plug Close the door or the cover Advise the user that th...

Page 268: ... and rear Note 2 3 Density of gray scale No 1 good or bad Note 2 4 Fogging of background Note 2 NO YES Scanning system pickup feeding system delivery assembly Check the following 1 Cartridge 2 Scanning lamp 3 AE sensor PCB 4 DC controller PCB 5 Composite power supply PCB See the appropriate troubleshooting procedure Is the optimum density obtained by intensity adjustment Note 3 Can the deviation b...

Page 269: ...gle feeder pickup roller Item Tools solvents Work remarks Multifeeder Pickup roller Cassette pickup roller Registration roller Transfer guide Moist cloth Moist cloth Cleaning Cleaning Cleaning Transfer charging roller Static eliminator Feed belt Lint free paper Special brush Moist cloth Cleaning Cleaning Cleaning Cleaning Moist cloth or alcohol Moist cloth or alcohol Moist cloth or alcohol Cleanin...

Page 270: ...heet is copied in Direct Caution If you have performed this adjustment be sure to adjust the image leading edge margin Figure 11 201 1 Turn VR105 on the DC controller PCB so that the width is as indicated Figure 11 202 Table 11 201 Turing VR105 and Leading Edge Non Image Width Direction of VR105 Clockwise Counterclockwise Leading edge non image width Decreases Increases 2 0 1 5mm VR105 J102 J101 J...

Page 271: ...ion Be sure to check that the leading edge non image width is as indicated before performing this adjustment Figure 11 203 1 Turn VR104 on the DC controller PCB so that the margin is as indicated Figure 11 204 Table 11 202 Direction of VR104 Clockwise Counterclockwise Image leading edge margin Increases Decreases Turing VR104 and Image Leading Edge Margin 2 5 1 5mm VR104 J102 J101 J107 J101 J131 V...

Page 272: ...r mount Reference 1 As more and more copies are made the cable tends to become slack requiring adjustment 2 If the optical length between the No 1 mirror and the No 2 mirror is not correct the horizontal reproduction ratio will be wrong causing poor sharpness or blurred images 1 Fit the mirror positioning tool FY9 3009 as shown Figure 11 205 2 Remove the copyboard glass See Chapter 7 III C 1 Remov...

Page 273: ...ANON PC800s 900sREV 0AUG 1999PRINTEDINJAPAN IMPRIMEAUJAPON 11 8 4 Turn the cable drive pulley 3 so that the three shafts 2 of the mirror positioning tool for the front and the rear may be arranged as shown Figure 11 207 rear Figure 11 208 front 3 2 2 2 2 ...

Page 274: ...1999 CANONINC CANON PC800s 900sREV 0AUG 1999PRINTEDINJAPAN IMPRIMEAUJAPON 11 9 5 While keeping the condition of 4 tighten the positioning screw at the rear and the front of the No 1 mirror mount 1 Figure 11 209 rear Figure 11 210 front 1 1 ...

Page 275: ...he like can occur If a fault is suspected check the force of the spring using a spring gauge CK 0054 and replace the spring if it is not as indicated Standard 970 150 g Making Measurements Push the spring gauge against the middle of the spring as shown and check to make sure that the reading of the spring gauge is 970 150 g when the holding plate is 18 mm away from the bottom of the cassette Figur...

Page 276: ...UBLESHOOTING COPYRIGHT 1999 CANONINC CANON PC800s 900sREV 0AUG 1999PRINTEDINJAPAN IMPRIMEAUJAPON 11 11 e 1 Routing the Scanner Drive Cable Figure 11 212 Wind 1 5 times black cable Wind 7 5 times silver colored cable ...

Page 277: ...k Prepare the following Mirror positioning tool FY9 3009 Cable clip FY9 3017 Adhesive tape 1 Set the mirror positioning tool as shown Figure 11 213 2 Prepare about five strips of adhesive tape each one about 20 50 mm 3 Remove the copyboard glass See Chapter 7 III C 1 Removing the Copyboard Glass 4 Disconnect the connectors J101 J131 1 from the DC controller PCB Figure 11 214 1 ...

Page 278: ...G 1999PRINTEDINJAPAN IMPRIMEAUJAPON 11 13 5 If the machine is equipped with an ADF free the hook 2 and disconnect the two relay connec tors 3 from the left upper stay 4 Figure 11 215 6 Remove the three screws 5 and detach the left upper stay 4 Figure 11 216 2 2 2 2 3 3 4 5 4 5 ...

Page 279: ...CHAPTER 11 TROUBLESHOOTING COPYRIGHT 1999 CANONINC CANON PC800s 900sREV 0AUG 1999PRINTEDINJAPAN IMPRIMEAUJAPON 11 14 7 Remove the four screws 7 and detach the lens cover 8 Figure 11 217 7 7 8 ...

Page 280: ...RIMEAUJAPON 11 15 2 Routing the Reversing Cable 1 Wind the reversing cables silver colored 2 on the cable drive pulley 1 7 5 times with the longer of the two on top then secure it in position with a cable clip 3 Figure 11 218 Figure 11 219 2 Shorter end Longer end 1 Face with a marking 1 3 Top view 3 ...

Page 281: ...PAN IMPRIMEAUJAPON 11 16 2 Put the cable drive pulley 1 into the shaft 4 and secure it in position with an E ring 5 When putting the cable drive pulley into the shaft be sure that the hook is at the front Figure 11 220 3 Hook the shorter end 6 on the pulley 7 Figure 11 221 5 Hook front 1 4 7 6 ...

Page 282: ...nd the No 2 3 mirror mount 9 then hook it on the left rear pulley 10 and the pulley 11 of the No 2 3 mirror mount Figure 11 222 5 After fitting the shorter end 6 on the cable hook 12 secure its end with adhesive tape 13 Be sure that the secured end of the cable is found where the hole in the left side plate and the tip of the cable matches Figure 11 223 10 11 6 8 9 6 12 13 ...

Page 283: ... longer end 14 along the cable drive pulley and hook it on the pulley 15 on the right front side Figure 11 224 7 Lead the longer end 14 under the No 1 mirror mount 8 and the No 2 3 mirror mount 9 then hook it on the pulley 16 on the left front side and the pulley 17 of the No 2 3 mirror mount Figure 11 225 14 15 1 8 17 9 16 14 ...

Page 284: ...INTEDINJAPAN IMPRIMEAUJAPON 11 19 8 Hook the longer cable 14 on the cable hook 18 then secure its end to the left side with adhesive tape 19 Be sure that the secured end of the cable is found where the hole in the left side plate and the tip of the cable matches Figure 11 226 18 19 14 ...

Page 285: ... Fit the longer end forwarding cable black 2 on the top hook of the cable drive pulley 1 and wind it 1 5 times Then secure the shorter end 3 as shown with adhesive tape 4 Figure 11 227 2 Lead the longer end 5 along the cable drive pulley 1 as shown and hook it on the pulley 6 on the right front side Figure 11 228 4 3 2 1 Face without a marking 5 6 1 ...

Page 286: ...MEAUJAPON 11 21 3 Lead the longer end 5 under the No 1 mirror mount 7 then hook it on the pulley 8 of the No 2 3 mirror mount and lead it between the No 1 mirror mount 7 and the scanning lamp 9 Figure 11 229 4 Hook the end of the longer end 5 on the hole 10 on the right side Figure 11 230 5 7 8 9 5 10 ...

Page 287: ...11 22 5 Free the shorter end 3 and hook it on the pulley 11 on the right rear side Figure 11 231 6 Lead the shorter end 3 under the No 1 mirror mount 7 and hook it on the pulley 12 of the No 2 3 mirror mount as shown then lead it between the No 1 mirror mount 7 and the scanning lamp 9 Figure 11 232 11 3 7 9 3 12 ...

Page 288: ...AUG 1999PRINTEDINJAPAN IMPRIMEAUJAPON 11 23 7 Hook the end of the shorter end 3 on the hole 13 on the right side Figure 11 233 8 Free the shorter end 3 and the longer end 5 reversing cable and connect both with a spring 14 then fit the stopper 15 Figure 11 234 3 13 14 3 15 5 ...

Page 289: ...CHAPTER 11 TROUBLESHOOTING COPYRIGHT 1999 CANONINC CANON PC800s 900sREV 0AUG 1999PRINTEDINJAPAN IMPRIMEAUJAPON 11 24 9 Detach the pulley clip 16 from the cable drive pulley 1 Figure 11 235 1 16 ...

Page 290: ... PC800s 900sREV 0AUG 1999PRINTEDINJAPAN IMPRIMEAUJAPON 11 25 4 Positioning the No 1 Mirror Mount 1 Fix the rear and the front of the No 1 mirror mount 1 temporarily to the metal fixing 2 of the forwarding cable Figure 11 236 rear Figure 11 237 front 1 2 1 2 ...

Page 291: ...CANONINC CANON PC800s 900sREV 0AUG 1999PRINTEDINJAPAN IMPRIMEAUJAPON 11 26 2 Turn the cable drive pulley 4 so that the three shafts 3 of the mirror positioning tool for rear and front is as shown Figure 11 238 rear Figure 11 239 front 4 3 3 3 3 ...

Page 292: ...999 CANONINC CANON PC800s 900sREV 0AUG 1999PRINTEDINJAPAN IMPRIMEAUJAPON 11 27 3 While keeping the condition of step 2 tighten the positioning screw on the rear and front of the No 1 mirror mount 1 Figure 11 240 rear Figure 11 241 front 1 1 ...

Page 293: ...nning lamp be sure that its logo mark manufacturer s name is toward the front Further be sure that the protrusion near its middle is as shown Figure 11 242 Caution If you have replaced the scanning lamp you must adjust the intensity of the lamp p 11 42 and perform AE adjustment Do not touch the lamp when handling it Logo mark Scanning lamp 45 approx mirror mount moving in reverse front ...

Page 294: ...NTEDINJAPAN IMPRIMEAUJAPON 11 29 g Points to Note When Mounting the Fuse When mounting the thermal fuse of the No 1 mirror mount be sure that the fuse is oriented as shown Make sure that the fuse is in contact with the reflecting plate Figure 11 243 front Thermal fuse Reflecting plate ...

Page 295: ...order 1 Correcting original skew 2 Adjusting the rear front original stop position 3 Adjusting the original leading edge stop position 2 Correcting Original Skew 1 Obtain a sheet of A4 or LTR white copy paper and draw two lines as indicated The sheet will be used as a test sheet Figure 11 244 2 Turn on the machine and place the test sheet prepared in step 1 on the original tray Figure 11 245 10mm ...

Page 296: ...etween L1 and L2 on the copy is 1 8 mm standard or less Figure 11 246 5 If the difference is not as specified turn the adjusting screw found to the side of the left hinge unit to make adjustments Figure 11 247 Relationship between Adjusting Screw and L1 L2 Table 11 203 Direction of turn Clockwise Counterclockwise Relationship between L1 and L2 L1 L2 L1 L2 Copy image L1 L2 280mm L1 L2 0 1 8mm Adjus...

Page 297: ...Stop Position You must first correct original skew before adjusting the rear front original stop position 1 Obtain a sheet of A4 or LTR white copy paper and draw two lines as indicated The sheet will be used as a test sheet Figure 11 248 2 Remove the original tray cover from below the original tray Figure 11 249 10mm 10mm A4 LTR copy papper Original tray cover ...

Page 298: ...MPRIME AU JAPON 11 33 3 Turn on the machine and place the test sheet prepared in step 1 on the original tray Figure 11 250 4 Press the Copy Start key to make a copy 5 Check to make sure that the distance L3 on the copy image indicated is 10 2 5 mm standard or less Figure 11 251 Copy image L3 L3 10 2 5mm ...

Page 299: ... 34 6 If the distance is not as specified loosen the pinion gear positioning screw under the original tray and adjust the position of the pinion gear Figure 11 252 Relationship between Pinion Gear Position and L3 Table 11 204 Direction of pinion gear A B L3 Increases Decreases Pinion gear positioning screw Pinion gear A B ...

Page 300: ...irst correct original skew and adjust the rear front original stop position before adjusting the original leading edge stop position 1 Obtain a sheet of A4 or LTR white copy paper and draw two lines as indicated The sheet will be used as a test sheet Figure 11 253 2 Remove the screw and remove the ADF controller cover Figure 11 254 10mm 10mm A4 LTR copy papper ADF controller cover Screw ...

Page 301: ...RIME AU JAPON 11 36 3 Turn on the machine and place the test sheet prepared in step 1 on the original tray Figure 11 255 4 Press the Copy Start key to make a copy 5 Check to make sure that the distance L4 on the copy image indicated is 10 2 0 2 5 mm standard or less Figure 11 256 Copy image L4 L4 10 2 0mm ...

Page 302: ... the DIP switch SW1 on the ADF controller PCB to ON and place an A4 or LTR white copy paper on the original tray Figure 11 257 7 Press the push switch PSW on the ADF controller PCB The copy paper will be picked up from the original tray and stopped on the copyboard glass Figure 11 258 0 F E D C B A 9 8 7 6 5 4 3 2 1 ON 1 2 ON 1 2 SW1 0 F E D C B A 9 8 7 6 5 4 3 2 1 ON 1 2 PSW ...

Page 303: ...switch by a single notch changes the original stop position by about 0 3 mm Press the push switch PSW after deciding on a position to discharge the copy paper and store the optimum value Figure 11 259 Relationship between Rotary Switch Direction and Original Position Table 11 205 Position shift of original Toward leading edge Toward trailing edge Direction of rotary switch Clockwise Counterclockwi...

Page 304: ...ing edge by 3 mm 1 Place a sheet of A4 or LTR white copy paper on the original tray 2 Shift bit 1 of the DIP switch SW1 on the ADF controller PCB to ON then push the push switch PSW to pick up the copy paper Figure 11 260 3 Turn the rotary switch SW2 on the ADF controller PCB clockwise by 10 notches Figure 11 261 0 F E D C B A 9 8 7 6 5 4 3 2 1 ON 1 2 ON 1 2 SW1 0 F E D C B A 9 7 6 5 4 3 2 1 ON 1 ...

Page 305: ...00s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 11 40 4 Press the push switch PSW on the ADF controller PCB The copy paper on the copyboard will be discharged and the optimum value will be stored Figure 11 262 0 F E D C B A 9 8 7 6 5 4 3 2 1 ON 1 2 PSW ...

Page 306: ... adjust the intensity of the scanning lamp and execute AE adjustment Table 11 206 Adjustment 1 Intensity of the scanning lamp 2 AE mechanism 1 AE mechanism 1 Intensity of the scanning lamp 2 AE mechanism 1 Intensity of the scanning lamp 2 AE mechanism 3 Leading edge non image width 4 Image leading edge margin 5 Reproduction ratio fine adjustment 1 Excute original leading edge stop position ad just...

Page 307: ...king Adjustments 1 Set a cartridge in the machine 2 Set the density correction switch SW101 to its middle index Figure 11 263 3 Turn off the AE mechanism and set the copy density adjusting lever on the control panel to its middle index 4 Place the Test Sheet on the copyboard and make a copy 5 Turn VR107 on the DC controller PCB gradually until gray scale No 9 is barely visible Figure 11 264 Table ...

Page 308: ...any photos or large display text Obtain five sheets of white sheets of paper Be sure that the intensity of the scanning lamp has been adjusted when you have replaced the scanning lamp Set the density correction switch SW101 to the middle setting If the machine is not equipped with a density correction switch set the density adjusting lever to the middle set ting 1 Short JP103 and JP104 on the DC c...

Page 309: ...emove the newspaper from the copyboard and place five sheets of copy paper in its place then close the copyboard cover 8 Turn VR103 on the DC controller PCB so that the display will indicate 52 to 5c Figure 11 268 VR103 J102 J101 J107 J101 J131 VR103VR102 J103 J130 J114 J104 J105 J109 J106 J102 VR104 VR105 VR106 VR107 VR102 J102 J101 J107 J101 J131 VR103VR102 J103 J130 J114 J104 J105 J109 J106 J10...

Page 310: ...to the target values at the same time turn VR103 fully counterclockwise and go back to step 5 and make adjustments once again 10 Make a copy and check to make sure that it is free of fogging and its text is adequately dark If the copy is foggy or its text is too light go back to step 1 and start over If the results of adjustment for a second time are not good make adjustments using the den sity co...

Page 311: ...B Making Adjustments Before Starting the Work Meter 1 Before replacing the DC controller PCB turn on the power then connect the meter probes to CP23 and GND on the DC controller PCB and measure the voltage probe CP23 probe GND Figure 11 270 2 After replacing the DC controller PCB measure the voltage as in step 1 then turn VR106 on the DC controller PCB so that the reading is the same as before rep...

Page 312: ...l path roller pa per sensor PDP Q751 Pre registration roller paper sensor RPD Checks During standby move the scanner by hand During standby move the lens mount by hand During standby move the detecting lever by hand During standby move the detecting lever by hand When the light block ing plate is at PS1 When the light block ing plate is not at PS1 When the light block ing plate is at PS2 When the ...

Page 313: ...blem in question is caused by the machine or the originals a The copy density adjusting lever is often best if set to the middle index b Originals with a red tint tend to produce copies with poor contrast e g red sheets c Originals which are diazo copies or with transparency tend to produce copies which can be mistaken for foggy copies Originals prepared in pencil tend to produce copies with light...

Page 314: ...to have white lines or spots as shown Figure 11 301 Try the following as necessary 1 Take out the cartridge from the machine and shake it several times Figure 11 302 2 Set the cartridge back into the machine and make copies If the copies are normal You may continue to use the cartridge but the user must know that it must be replaced with a new cartridge soon If the copies are not normal Replace th...

Page 315: ...b The drum is likely to be cold high OPC electrical resistance not enabling good contrast c Condensation in the pickup feeding assembly tends to cause feeding faults d Condensation on the lower roller of the manual feed assembly will reduce friction causing pickup faults If condensation is noted dry wipe the parts in question The cartridge can develop condensation if it is opened immediately after...

Page 317: ...0s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 11 52 NOTE The samples are created intentionally The NA 3 Test Sheet was copied in the direct mode in A3 and printed with a reduction of about 19 actual images may be somewhat different ...

Page 318: ... transfer more or less normal Be sure to make a check in a short time to protect the drum from light Is the transfer charging roller normal Try fresh copy paper Is the problem corrected Measure the electrical resistance on the transfer lower guide plate and the side plate metal of the fixing assembly Is it 0Ω Replace the cartridge Is the problem corrected Action End Go to step 6 1 Mount the transf...

Page 319: ...ount the transfer charging roller correctly 2 Replace the transfer charging roller correctly 6 The copy is foggy entire face YES NO NO YES NO YES Cause Scanner Grounding spring Scanning lamp Devel oping bias Step 1 2 3 Checks Is the density correction switch SW101 or the density adjusting lever set to the middle setting Clean the scanning lamp reflecting plate lens and mirror Is the problem correc...

Page 320: ... the static eliminator Is the problem corrected Is there foreign matter or scratches in the transfer charging roller assembly Action Check the fixing assembly Inform the user that the cartridge is run ning out of toner End Remove the foreign matter or replace the transfer charging roller Replace the cartridge 7 The copy is foggy vertically 8 The copy has black lines vertical fuzzy thick 9 The copy...

Page 321: ...tor 4 Check the cartridge for leakage of toner Clean the feeding assembly Clean the pickup guide assembly and the delivery roller 12 The copy has white spots horizontal YES NO YES YES Yes NO Cause Copy paper Scanner rail Scanning lamp Devel oping bias Step 1 2 3 Checks Is the paper of a recommended type Try paper fresh out of package Is the problem corrected Is the problem noted at the same positi...

Page 322: ...B 15 The copy has a misplaced leading edge extremely excess margin 16 The copy has a misplaced leading edge excess margin 17 The copy has a misplaced leading edge no margin YES NO NO NO YES NO NO YES Cause Pickup roller Pickup clutch Cassette Sensor PS1 Light blocking plate VR104 Solenoid SL2 DC controller PCB Copy paper Registration clutch Step 1 2 3 4 5 Checks Make copies using the cassette and ...

Page 323: ...mposite power supply PCB Check the scanning system Check the feeding system 18 The copy has a blurred image YES NO YES NO YES YES NO Cause Scanner drive cable Scanner rail Feeding system Cartridge Step 1 2 3 4 Checks Does the cable wind on itself when the scanner is moving Or is the cable too slack or too taut Move the No 1 mirror mount slowly by hand Does it move slowly Is abnormal noise heard fr...

Page 324: ...oreign matter and clean it Adjust the distance between No 1 mirror and the No 2 mirror End Replace the cartridge 21 The copy is blank YES NO NO YES NO NO NO YES NO Cause Cartridge Drum drive assembly High voltage transformer Primary high voltage charging terminal cartridge Step 1 2 3 4 5 6 Checks Is the cartridge set in the machine Does the cartridge have toner Has the open seal been removed Set t...

Page 325: ...NON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 11 60 22 The copy is solid black YES NO NO YES Cause Step 1 Checks Does the scanning lamp remain on during copying Action See The scanning lamp fails to turn on Is the cartridge set correctly ...

Page 326: ...ctions 1 E0 YES NO YES NO Cause Step 1 Checks 1 Turn off the power and short JP101 and JP102 on the DC controller PCB with a screwdriver Figure 11 401 2 While keeping the condition in step 1 turn on the power switch 3 Is an error code indicated in re sponse to a press on the Copy Start key Action See the instructions given for the respec tive error code End JP102 JP101 JP101 JP102 ...

Page 327: ...lem corrected Action Correct the connection of J102 on the DC controller PCB and the wiring to the ther mistor TH1 Check the wiring from the composite power supply PCB to the fixing heater if normal replace the fixing assembly upper unit End End Replace the DC controller PCB 3 E001 YES NO NO YES YES NO Cause Thermistor TH1 Thermistor Composite power supply PCB DC control ler PCB Step 1 2 3 Checks ...

Page 328: ...y PCB to the fixing heater if normal replace the fixing upper unit End End Replace the DC controller PCB 5 E010 YES NO NO NO NO YES NO Cause Wiring 1 Wiring 2 DC power supply Main motor M1 DC control ler PCB Step 1 2 3 4 Checks Are the connection of J205 on the composite power supply PCB and the wiring to the main motor M1 nor mal Is the wiring from J203 and J202 on the composite power supply PCB ...

Page 329: ...tches or tears Replace the composite power supply PCB Is the problem corrected Action Check the wiring between the DC controller PCB and the composite power supply PCB Check the wiring between the composite power supply PCB and the high voltage contact PCB Correct the high voltage contacts of the machine s top and bottom units Replace the transfer charging roller End Replace the high voltage cable...

Page 330: ... the Copy Start key is pressed Replace the composite power supply PCB Is the problem corrected Action See The scanning lamp fails to turn on End Replace the DC controller PCB 10 E240 YES NO NO YES NO Cause Wiring Composite power supply PCB DC control ler PCB Step 1 2 Checks Is the wiring from J203 and J204 on the composite power supply PCB and J103 and J104 respectively on the DC controller PCB no...

Page 331: ...be to the copier ground Is the voltage about 5V Figure 11 402 Replace the ADF controller PCB Is the problem corrected Action End Check the wiring between the copier s DC controller PCB and the ADF controller PCB Replace the ADF controller PCB End Replace the copier s DC controller PCB 0 F E D C B A 9 8 7 6 5 4 3 2 1 ON 1 2 13 E803 YES NO YES YES NO Cause Malfunction DC control ler PCB Composite po...

Page 332: ...e faston of the door switch Is the resistance about 0 Ω when the actuator is pressed add about Ω when it is released Is the rated voltage present between J501 1 and 2 Is the rated voltage present between J201 1 and J201 2 Is there electrical continuity between J111 15 on the DC controller PCB and J301 15 on the control panel PCB Is there electrical continuity between J204 1 on the composite power ...

Page 333: ... nect J202 and J205 from the composite power supply PCB Set the meter range to 30 VDC and turn on the power switch Is the voltage between the following termi nals normal Table 11 401 Is the fuse FU102 on the composite power supply PCB blown 120V model 125 V 5 V 220 240V model 250 V 2 5 A Action See AC power fails to turn on See the descriptions under E0 Remove the cause of the problem and replace ...

Page 334: ... paper in the cassette placed correctly Set the meter range to 30 VDC and connect the meter probes to the fol lowing terminals Does the voltage change to about 24 V in keeping with pickup operation Table 11 402 Is the force of the cassette spring within specification See p 11 10 Action See The main motor fails to rotate Set the cassette cor rectly Instruct the user on the correct method of placing...

Page 335: ...keeping with pickup operation Table 11 403 Action Instruct the user on the correct way of operat ing the machine See The main motor fails to rotate Instruct the user on the correct way of placing paper Check the wiring from the solenoid to the DC controller PCB if normal replace the solenoid in question Replace the DC controller PCB Multifeeder pickup solenoid SL4 Pickup clutch solenoid SL1 J109 8...

Page 336: ...ls to turn on Check the wiring from J108 on the DC controller PCB to Q751 if normal replace Q751 End Replace the DC controller PCB 20 The registration roller fails to rotate Yes No No No No Yes No Cause Main motor M1 Pre registra tion roller paper sensor Q751 Registration roller spring clutch Registration clutch solenoid SL2 DC control ler PCB Step 1 2 3 4 Checks Does the main motor M1 start to ro...

Page 337: ...ite power supply PCB Step 1 2 3 4 Checks Turn off the power switch and discon nect the power plug from the power outlet Is the scanning lamp LA1 mounted correctly Set the meter range to 1 kΩ and connect the meter probes to both terminals of the fuse FU1 Does the index of the meter swing Disconnect the connector J910 from th ecomposite power supply PCB and set the tester range to 1kΩ Does the teste...

Page 338: ...t J202 2 and 1 on the composite power supply PCB Is the meter reading about 24 V Replace the scanner lens drive motor M2 Is the problem corrected Action Check the wiring from J109 on the DC controller PCB to SL3 if normal replace SL3 Check the lens cable pulley and rail as necessary clean the cable and adjust its tension See DC power fails to turn on End Replace the DC controller PCB 24 The fixing...

Page 339: ...ce the control panel PCB Is the problem corrected Action Set the cassette cor rectly Check the lens cable pulley and rail as necessary clean the cable and adjust its tension See The DC power fails to turn on Check the wiring from J132 on the DC controller PCB to PS4 if normal replace the PS4 End Replace the DC controller PCB 26 The Jam message fails to turn off YES NO YES NO YES Cause Jam paper Se...

Page 340: ...IME AU JAPON 11 75 V TROUBLESHOOTING FEEDING PROBLEMS A Copy Paper Jam Inside the machine jams tend occur in the following blocks 1 Pickup block 2 Separation feeding block 3 Fixing delivery block The troubleshooting procedures that follow are organized according to the location of a jam Figure 11 501 3 2 1 ...

Page 341: ...rectly Is the copy paper curled or wavy Try paper recommended by Canon Is the problem corrected Does the pickup roller of the pickup assembly of the selected source cassette manual feeder rotate during a copying run Does the registration roller operate normally Does the vertical path roller paper sensor operate normally Action Go to step 5 Set the cassette cor rectly Replace the copy paper Instruc...

Page 342: ... user on the correct method of storing paper Remove the foreign matter Check the belt and the roller Replace the sensor or the lever Clean the static eliminator If dirt is found clean with alcohol if wear or deformation is found replace it 1 Check the spring used to control registration 2 Check the spring clutch of the regis tration assembly 3 Fixing Delivery Assembly YES NO YES YES NO NO NO YES C...

Page 343: ...rce of the spring of the cassette if faulty replace the cassette spring Even out the sheets in the cassette Ask the user to use recommended paper Check the claw for deformation 2 Wrinkles YES NO YES YES YES NO YES Cause Pickup assembly Vertical path roller Registration roller Copy paper Fixing assembly Inlet guide Step 1 2 3 4 Checks Turn off the power while copy paper is moving through the feedin...

Page 344: ...position detection Delivery assembly paper detection Vertical path assembly paper detection Single feeder paper detection Pre registration roller paper detec tion Pickup clutch solenoid Registration clutch solenoid Lens solenoid Multifeeder pickup solenoid Cassette pickup solenoid Symbol Name Photointerrupters Solenoid Notation PS1 PS2 PS3 PS4 PS5 Q751 SL1 SL2 SL3 SL4 SL5 Remarks Single feeder typ...

Page 345: ...ANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 11 80 B Switches Figure 11 602 Description Door switch Power switch Density correction switch Symbol Name Switch Switch Notation DS1 SW309 SW101 Remarks DS1 SW309 SW101 ...

Page 346: ... Main motor Scanner lens drive motor Scanner cooling fan Fixing heater temperature detection Scanner temperature detection Lamp overheating detection Fixing heater overheating detection Fixing film varistor Transfer guide varistor Symbol Name Lamp Heater Motor Fan motor Thermistor Thermal fuse Varistor Notation LA1 H1 M1 M2 FM1 TH1 TH2 FU1 FU2 VZ1 VZ2 Remarks M M2 M1 FU1 LA1 FM1 VZ1 H1 VZ2 TH1 TH2...

Page 347: ...voltage and controls the scanning lamp Makes an electrical connection between the machine top and bottom Provides copying insurrections indications Detects paper in front of the registration roller Detects the density of originals Used for blanking exposure Used for blanking exposure Ref 1 2 3 4 5 6 7 8 9 Name Noise filter PCB DC controller PCB Composite power supply PCB High voltage contact PCB C...

Page 348: ...F Description Delivery paper detection Registration roller paper detection Original placement detection ADF open close switch Belt motor Pickup motor Controls sequence of operations Symbol 1 Name Photointerrupter Microswitch Motor ADF controller PCB Notation PI1 PI2 PI3 MS1 M1 M2 Remarks PS M2 PI3 PI2 M1 PI1 MS1 1 M Figure 11 605 ...

Page 349: ...t to an extremely accuracy Do not touch them in the field Caution VRs that may be used in the field VRs that must not be used in the field 1 DC Controller PCB Figure 11 606 2 Composite Power Supply PCB Figure 11 607 J130 J114 J102 J111 J201 J111 J108 3 1 2 1 2 8 1 9 1 JP102 JP101 1 6 1 7 1 19 18 2 5 3 1 5 1 2 1 6 SW101 J113 J132 J106 J109 1 J105 J104 6 7 1 J103 J107 J101 J131 8 1 1 4 1 11 VR104 VR...

Page 350: ...TING COPYRIGHT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON 11 85 3 ADF Controller PCB Figure 11 608 1 10 TP1 1 9 J5 1 8 4 J2 1 J1 CB1 2 1 J6 7 1 J3 FACE PSW SW1 SW2 1 2 ON Soldered side ...

Page 351: ...or TH1 is faulty The fixing heater H1 is faulty The thermal fuse FU2 has blown The DC controller PCB is faulty The composite power supply PCB is faulty The power switch is turned off and then on immediately after an error E000 E001 E002 E003 has occurred The temperature detected by the thermistor TH1 does not reach 65 C 1 5 sec after the Copy Start key has been pressed The temperature detected by ...

Page 352: ...ndicated by MLOCK 0 for 1 sec or more while the main motor drive signal MMD 1 is being generated The actual output value of the compos ite power supply high voltage is differ ent from the setting value twice in succession The scanner home position is not detected within 10 sec after the scanner has turned on The scanner does not leave the home position after it has turned on The lens hoe position ...

Page 353: ... to the fixing heater otherwise oc curring if the thermistor has an open circuit 2 In the case of E0 E000 E001 E002 E003 or E220 the machine will turn off in 1 5 sec for E0 and E000 through E003 and in 2 sec for E220 3 In the case of E0 E000 E001 E002 or E003 perform the following steps 1 Turn off the power switch and short circuit JP101 and JP102 on the DC controller PCB with a screwdriver or the...

Page 354: ...RCUIT DIAGRAM A 7 E ADF CONTROLLER CIRCUIT DIAGRAM A 15 F COMPOSITE POWER SUPPLY CIRCUIT DIAGRAM A 19 G CONTROL PANEL CIRCUIT DIAGRAM A 27 H AE SENSOR CIRCUIT DIAGRAM A 29 I SENSOR CIRCUIT DIAGRAM A 30 J NOISE FILTER CIRCUIT DIAGRAM A 31 K HIGH VOLTAGE CONTACT CIRCUIT DIAGRAM A 32 L BLANK EXPOSURE front CIRCUIT DIAGRAM A 33 M BLANK EXPOSURE rear CIRCUIT DIAGRAM A 34 N SPECIAL TOOLS A 35 O SOLVENTS...

Page 355: ......

Page 356: ...nsor PS1 Lens home position sensor PS2 Pickup clutch solenoid SL1 Cassette pickup solenoid SL5 Vertical path roller paper sensor PS4 Registration clutch solenoid SL2 Pre registration roller paper sensor Q751 Scanning lamp LA1 Primary AC bias Primary DC bias Developing AC bias Fixing heater H1 Scanner cooling fan FM1 Delivery sensor PS3 Developing DC bias Transfer bias Static eliminator bias SCFW S...

Page 357: ...s solenoid SL3 Pickup clutch solenoid SL1 Cassette pickup solenoid SL5 Vertical path roller paper sensor PS4 Scanner cooling fan FM1 Pre registration roller paper sensor Q751 Scanning lamp LA1 Primary AC bias Primary DC bias Copier ADF Registration clutch solenoid SL2 Transfer bias Static eliminator bias Developing AC bias Developing DC bias Fixing heater H1 Delivery sensor PS3 Copy Start key ON O...

Page 358: ...ignal PDC_PWM DC BIAS CONTROL signal PDC_S DC VOLTAGE MONITOR signal PDP VERTICAL PATH ROLLER PAPER DETECTION signal PR_DC_ON PRIMARY CHARGING DC BIAS ON signal PUSLD PICKUP CLUTCH SOLENOID DRIVE signal PWM_1KHz SCANNING LAMP INTENSITY ADJUSTMENT signal PWOFF POWER SWITCH OFF signal RGSLD REGISTRATION CLUTCH SOLENOID DRIVE signal RLOFF RELAY DRIVE signal RPD PRE REGISTRATION ROLLER PAPER DETECTION...

Page 360: ...NF1 NF1 FT3 1 2 FT4 Line filter LF1 J502 2 1 T302 J213 J212 J209 BP704 BP702 BP703 BP701 BP706 BP707 BP705 J14 J15 VZ2 J13 SP TR J12 J11 PR DV J205 3 2 1 4 GND 24VU 1 3 2 4 M M1 J901 J2 2 1 J207 1 2 2 1 J434 2 1 J16 J15 H1 J17 FU2 FU1 FT6 FT5 LA1 DC CONTROLLER PCB COMPOSITE POWER SUPPLY PCB HVT BOARD 1 HVT BOARD 2 MAIN MOTOR DRIVER PCB SENSOR PCB SIDE BLANK EXPOSURE PCB CONTROL PANEL PCB Power swi...

Page 361: ... 1 2 J2 J1 2 2 1 1 J6 FG Y GN Y OR W GY V OR GN ADFC OR OR 24V COM NO MS1 ADF Switch 4 2 1 3 6 5 7 4 2 1 3 5 6 7 J3 4 1 2 3 J5 5 6 7 8 9 1 2 4 3 5 7 6 8 9 ADF CONTROLLER PCB 4 4 2 1 3 2 1 3 5 5 M1 Belt motor 2 2 M1 Pickup motor 1 1 6 5 1 2 3 4 2 4 3 5 1 6 J105 PDP3 GY GND BL 5V BR PDP2 V GND BL 5V BR PDP1 Y GND BL 5V BR 2 3 1 J203 V BR BL PI3 sensor Original placement Registration sensor PI2 J202 ...

Page 362: ...s P44 P45 P46 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 8 ZER_CRS_LEVEL E0_BUCK FM1D D_L_2 D_L_2 HEAT_PWM PU_SL SC_I_SEL1 SC_INA SC_INA SC_INB SC_INB S_IN S_OUT 2 1 3 S_CLK REQ TXD 2 1 3 2 1 3 MFSLD 5V D_L_1 LS_HP_CPU RG_PD_CPU ZER_CRS_EDGE AD 7 0 NF101 3 1 2 R370 R372 R368 R373 R374 DIGIT 4 0 SEG 7 0 KEY 7 0 KEY 7 0 CPS_REQ PR_DC_ON DV_DC_ON DV_AC_ON SB_ON M1_ON REQ SC_I_S...

Page 363: ...L1 R117 Q112 SC_I_SEL2 SC_INB SC_INB SC_INA SC_INA R267 Q155 R115 OUTA 1 TdA 2 REFA 3 GA 4 INA 5 INA 6 VSA 7 OUTA 8 RSA 9 RSB 10 OUTB 11 VSB 12 TdB 13 REFB 14 GB 15 INB 16 INB 17 OUTB 18 R114 R111 R107 R108 C109 C263 C264 C265 C266 R113 Q109 R112 SC_COM SC_B SC_B SC_A SC_A 5V R224 R225 R226 R227 5V 5V R109 C108 5V R399 24VU C166 C106 C107 C165 C164 C163 3 2 1 ...

Page 364: ...REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON DC Controller Circuit Diagram 3 8 R119 R118 VR102 2 3 1 5V C184 Q106 24VR 2 3 1 8 4 R266 AEREF R265 R264 R263 VR103 2 3 1 5V C186 C185 C111 C155 Q106 24VR 6 AE 5 7 8 4 R206 R120 AE_DATA R121 ZD101 2 1 ...

Page 365: ...103 D190 AB inch inch KR5 1 2 D214 VOL1 DIG4 D214 120V 220 240V KR3 R127 6 6 KR6 R128 5 5 KR5 R129 4 4 KR4 R130 3 3 KR3 R131 2 2 KR2 R132 1 1 KR1 R133 0 0 KR0 R134 5 DIGIT 4 0 0 8 SEG 7 0 0 R138 R236 R228 R240 R243 R242 R241 R358 C168 R235 C175 R234 C174 R233 C173 R232 C172 R231 C171 R230 C170 R229 C169 Q121 DIG0 5V 1 R137 R239 Q124 DIG1 5V 2 R136 R238 Q123 DIG2 5V 3 R135 R237 Q122 DIG3 5V 4 R360 ...

Page 366: ...V 2 3 1 2 1 5 3 4 VSS IN A IN B VDD OUT X 8 4 R275 ZER_CRS_EDGE 5V R279 R293 VR105 2 BL_VR 3 1 5V R278 R294 VR104 2 RGAD_VR 3 1 5V R382 VR107 2 OP_VR 3 1 5V R292 VR106 2 LS_VR 3 1 5V R144 5V 5V C183 C181 C126 C167 5V Q153 ZER_CRS_LEVEL D183 R150 R154 R271 ZER_CRS SW101 AB inch type only R143 4 1 CP23 CPGND1 1 D_L_2 D_L_1 3 2 1 Q126 JP101 JP102 3 E0_BUCK 2 Q125 3 1 24VU D118 2 1 1 2 C123 ...

Page 367: ... M1_ON Q133 3 2 1 SB_LP R160 R163 ACK R182 TH1 M_TH 0 R173 TH2 1 R174 AE_DATA 2 R175 DSVR 3 R176 OP_VR 4 R177 LS_VR 5 R207 RGAD_VR 6 R178 BL_VR 7 R179 M1_LOCK_CPU MLOCK R183 HEAT_ERR_CPU HEAT_ERR R172 LS_HP_CPU LHP R171 CPS_REQ Q134 Q137 3 2 1 CPS_REQ PR_DC_ON Q136 3 2 1 PR_DC_ON DV_DC_ON Q135 3 2 1 DV_DC_ON DV_AC_ON Q138 3 2 1 DV_AC_ON STBY CPY Q140 3 2 1 STBY CPY 3 2 1 5V MMD R164 C127 C134 C135...

Page 368: ... Diagram 7 8 D184 D185 POWER_OFF HEAT_ERR COMP_CLR R189 R188 Q146 3 2 1 Q147 3 2 1 5V R186 R187 5V R196 5V 1 2 C142 R193 R192 R190 5V Q107 5V 6 5 7 8 4 R191 R212 R214 D128 2 1 D133 2 1 RLOFF HEAT_TRG C143 5V Q151 5V Q108 5V 3 2 1 8 4 C176 Q108 5V 5 6 7 8 4 C161 C160 Q158 Q160 Q148 3 2 1 M_TH HEAT_PWM D132 2 1 HEAT_OFF ...

Page 369: ...111 3 DIG3 J111 4 SEG0 J111 5 SEG1 J111 6 SC_COM J110 1 SC_B J110 2 SC_B J110 3 J110 4 SC_A J110 5 SC_A J110 6 J109 6 MFSLD J109 7 J109 8 J109 9 LHP 5V 24VU J109 10 J109 11 1 count2 1 count1 LNSLD J109 1 J109 2 J109 3 J109 4 RGSLD PUSLD J109 5 SEG2 J111 7 SEG3 J111 8 SEG4 J111 9 SEG5 J111 10 SEG6 J111 11 SEG7 J111 12 MLOCK J104 1 HEAT_TRG J104 2 ZER_CRS J104 3 S_CLK J104 4 S_OUT J104 5 S_IN J104 6...

Page 370: ...SCK1 23 P70 IS 24 P71 OS 25 P72 BUSY 26 P73 IOS 27 P74 AS 28 P75 WR 29 P76 RD 30 P77 WAIT 31 Vcc 32 P27 A15 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 8 9 10 11 12 13 14 7 0 1 2 3 4 5 6 15 TXD RXD DM0 DM1 WD LED ADFC PDP3 PDP2 PDP1 NC NC RD 5V 5V C8 C22 R44 A A B B ACK REQ NC NC 5V R5 R6 C7 X1 C6 R4 5V R3 JP1 Q1 5V 8 RESET Vs 7 Vref 6 Vcc 5 GND 4 3 Ck 2 RESET 1 Ct WD Q3 D1 C5 5V R2 PSW ...

Page 371: ... 5 INA 3 VrefA 1 OUTA Q4 C11 5V R10 Q8 5V R16 LED J7 2 1 J7 6 J3 OUT2 5 OUTA 2 IN2 IN1 1 OUT1 3 OUTA 7 J3 4 GND 6 7 24V NC VCC Q5 DM1 TP1 7 DM0 6 TP1 C12 R11 5V 9 RSA 11 OUTB 13 TdB 15 GND 17 INB 24V RSB 10 VSS 12 VrefB 14 INB 16 OUTB 18 MB 4 J3 MA 3 J3 MA 5 J3 MB 2 J3 1 J3 24V 24V R13 C14 R15 R14 C13 5V R8 R9 R12 B TP1 3 A TP1 2 A TP1 1 B TP1 4 TP1 5 NC TP1 10 ...

Page 372: ...2 4 8 SW2 5 2 J5 3 J5 R24 5V R23 5V TP1 9 PDP1 C18 R22 TP1 C17 PDP2 R42 8 R21 5 4 5V 6 J5 J5 J5 5V R20 C16 PDP3 R41 R19 8 7 5V 9 J5 J5 J5 5V 2 J2 R36 5V RXD 3 J2 1 J2 4 J2 5V R33 C20 R34 RXD R35 D3 HC14 13 12 Q6 HC14 Q6 10 11 HC14 Q6 8 9 HC14 Q6 6 5 L1 R38 5V R37 DIPSW1 TXD Q6 HC14 4 3 3 2 DIPSW0 4 1 SW1 R39 5V PSW SW3 ACK REQ REQ ACK R30 R31 Q9 Q6 HC14 2 1 C19 D2 6 5 J2 J2 5V R32 R29 7 J2 8 J2 5V...

Page 374: ...609 Q616 Q617 Q621 C604 Q605 VIN_1SR139 C818 C603 R601 R600 Q615 R616 R801 R609 C620 R613 R610 R612 R611 R615 R614 D620 D810 R620 D605 A508 A504 5V_ON ZER_CRS AC_MONITOR HEAT_TRG A508 A508 A508 Q620 AC1 A509 C601 5V 5V 5V 5V 5V Q607 R607 D604 C605 L600 SQ600 R622 R603 Q611 A503 A503 J207 FIX_HT_H AC_H_AF AC_N_AF A508 RLOFF FIX_HT_N Q614 R623 R621 RL601 T600 D601 C602 D602 1 1 2 3 4 2 AC_H AC_N J20...

Page 375: ...09 A502 MPWM MPWM_INV A508 A504 Q113 C588 D542 D543 R644 R108 D121 D106 D111 To radiator plate R184 R104 24VOFF LOW_GU LOW_G HV_H MV_H MV_L HV_L 24VON R105 R106 D122 D124 D125 D123 Q118 T103 C101 C151 C157 C156 D110 Q104 Q103 C138 C102 R111 R114 Q101 C105 C106 C107 R163 C104 R103 R109 T101 R110 T104 PROTECT A508 L103 5V 5V 1 1 3 2 9 A504 A504 A504 A504 A506 A505 A505 A506 10 11 12 13 14 15 16 1 5 ...

Page 376: ...17 C118 C136 24VR 24VR D118 D117 C137 Q117 R129 C135 R124 R122 R123 R127 D132 J202 ZD103 ZD101 R115 R149 R165 R158 R139 R157 L180 L181 Q180 C180 C183 C133 D104 D103 R118 C115 C116 R119 A508 C181 C182 R182 R181 R180 C184 D180 FB180 DC24V_S C141 FB101 24VOFF A503 TIM A508 A503 A503 A503 LOW_G LOW_GU 24VON R121 C132 C134 D130 D129 Q108 ZD102 24VU O C P 1 O C P 2 O V P Q116 C127 A502 VIN_1SR139 R168 R...

Page 377: ...Circuit Diagram A505 4 8 3 4 4 1 1 2 2 5 3 10 9 C512 R514 R212 PAC_OUT JP140 PDC_PWM A508 Q201 R211 C202 C204 D202 R209 R206 C206 A508 A503 A503 PDC_S R205 R203 C201 R202 T101 MV_H MV_L A508 JP202 PAC_S A508 C561 C509 C207 R201 C611 C513 C538 JP148 C539 R521 R516 R591 R549 R592 24VR 24VR R550 C510 Q526 T508 J209 PRIMARY ...

Page 378: ...er Supply Circuit Diagram A506 5 8 JP201 R210 A503 A503 C218 C215 A508 A508 A508 ACBIAS BIAS_S BIAS_PWM R243 R207 C219 D215 C208 D214 R237 R239 R208 5V Q206 R238 C221 T201 D207 D206 D208 D209 D210 C213 C211 C210 C212 C214 D211 R225 R254 J213 J215 J212 SEPARATION DEVELOPING R236 C220 HV_H HV_L T101 12 11 3 1 2 4 ...

Page 379: ... C342 A508 T_REV_R T_FW_S HV_LIMIT A508 A508 A508 T_FW_DRV T_FEEDBACK T_FW_ON A508 CLK32K A508 A508 R393 R392 R317 R390 24VR C377 R361 R327 T302 J210 Transfer output 5 6 2 7 7 1 D306 24VR R328 R338 R329 R330 R337 R332 ZD303 R326 C317 Q311 Q325 Q310 C318 D308 R318 C359 VR301 R336 Q308 C312 D307 T_REV_ON T_REV R352 R353 R354 R388 D328 D323 D324 D322 D340 D341 D342 D343 D344 D339 C329 R355 HV_H A503 ...

Page 380: ...503 A505 A506 A506 SKGND S_IN S_OUT S_CLK RLOFF ACK MMD CPS_REQ PR_DC_ON 24VU 24VU GND MMD MLOCK DV_DC_ON DV_AC_ON STBY CPY PWOFF J204 J203 J205 Q900 S_IN S_OUT S_CLK ZER_CRS A502 HEAT_TRG MLOCK A502 A502 JP999 220 240V model only 1 1 2 3 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 50 49 48 47 46 45 44 43 42 1 2 4 3 2 1 3 4 5 6 7 1 2 3 4 5 6 7 8 41 40 39 38 37 36 35 34 33 32 31...

Page 381: ... D006 C002 C004 5V Q002 D002 Q003 R016 Q011 Q001 C005 A508 LAMP_DETECT A508 A508 PWM_1KHz LAMP_ON D004 R011 R009 R063 C003 R029 ZD001 Q005 R030 D003 Q012 R019 D007 Q0001 D010 D009 D011 D008 AC_HA 502 502 AC_LA C008 R004 C001 R005 J910 HIC001 R026 R025 R001 L001 SQ001 R022 R003 VR001 R002 R007 R023 4 3 2 1 1 1 2 3 4 5 6 7 8 9 3 2 1 4 1 2 4 3 3 4 2 1 2 3 6 R012 R013 R018 R021 220 240V model only ...

Page 382: ...305 J301 10 SEG5 R306 J301 11 SEG6 R307 J301 12 SEG7 R308 LED306 2 1 LED316 LED305 2 1 LED317 LED304 2 1 LED312 2 1 LED303 2 1 LED311 2 1 LED302 LED315 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 D304 2 1 D303 2 1 D302 2 1 D301 2 1 LED310 c MULTI b CASSETTE a ZOOM 2 1 2 1 LED308 2 1 LED307 AE JAM 2 1 LED321 LIFT 1 2 LED320 ME 1 2 LED319 TS 1 2 LED318 PHOTO 1 2 LED301 e MAIN_JAM d DFJAM ADF ...

Page 383: ......

Page 384: ...ON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON A 29 APPENDIX H AE SENSOR CIRCUIT DIAGRAM 24VR R603 R605 R601 C601 Q601 PD601 C603 R606 R602 J601 1 C602 24VR 2 3 1 8 4 J601 2 R604 Q601 24VR 6 5 7 8 4 J601 3 J601 4 ...

Page 386: ...IGHT 1999 CANON INC CANON PC800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON A 31 APPENDIX J NOISE FILTER CIRCUIT DIAGRAM AC_H FU501 L501 J501 1 FG AC_N J501 2 JP502 JP501 C503 C502 C501 R501 C504 ...

Page 387: ...A 32 APPENDIX K HIGH VOLTAGE CONTACT CIRCUIT DIAGRAM JP701 2 1 JP702 2 1 PR BP701 R704 JP703 2 1 JP704 2 1 SP BP702 JP705 2 1 JP706 2 1 DV BP703 R701 JP707 2 1 JP708 2 1 TR BP704 R702 JP709 2 1 JP710 2 1 PR_IN BP705 JP711 2 1 JP712 2 1 GND_IN BP706 R703 JP713 2 1 1 2 1 2 JP714 2 1 DV_IN BP707 ...

Page 390: ...ressure Range of measure ments 0 to 1 500g No CK 0054 Shape Tool Tool No Rank Remarks Spring gauge Mirror position ing tool pair for front and rear 1 FY9 3009 B For adjusting the dis tance between the No 1 and No 2 mirrors Wire clip 2 FY9 3017 B For fixing the scanner wire in place while ad justing its tension 3 B Rank A Each service person is expected to carry one B Each five or so service person...

Page 391: ...ear fire Procure locally CK 0451 100cc CK 0551 20g Composition Hydrocarbon fluorine family Alcohol Surface active agent Hydrocarbon fluorine chlorine family Alcohol Mineral oil paraffin family Silicone oil Uses Cleaning e g glass plastic rubber parts external covers Cleaning e g metal oil or toner dirt Lubricating spring clutch Lubricating drive and friction parts scanner rail Name Alcohol Solvent...

Page 392: ...C800s 900s REV 0 AUG 1999 PRINTED IN JAPAN IMPRIME AU JAPON Prepared by Office Imaging ProductsTechnical Support Division CANON INC Printed in Japan REVISION 0 AUG 1999 30359 10317 5 1 Hakusan 7 chome Toride shi Ibaraki 302 8501 Japan ...

Page 393: ...0899AB2 135 1 PRINTED IN JAPAN IMPRIME AU JAPON This pubication is printed on 70 reprocessed paper ...

Search results

Summary of Contents for PC920

Reviews:

Related manuals for PC920

Brands by name

Popular brands

Canon PC920, Service Manual

Search results

Summary of Contents for PC920

Reviews:

Related manuals for PC920

Brands by name

Popular brands