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CHAPTER 4 IMAGE FORMATION SYSTEM

COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

4-6

C.

Maintaining Primary/Transfer Corona Current Constant

If the primary corona current is greater than the correct value due to changes in the environ-

ment, the level (analog) of the feedback signal to the differential amplifier circuit will increase and
the output from the differential amplifier circuit will fall. As a result, the primary/transfer corona
current will fall. Similarly, if the primary corona current is too low, it will be increased.

If the output side of the high-voltage transformer supplying the primary corona assembly

should be overloaded, the current will be limited to a certain maximum.

Figure 4-301

Microprocessor

DC controler PCB

High-voltage transformer(HVT)

OVER

Primary corona
assembly

Photosensitive
drum

Grid

Transfer corona
assembly

24V

T3 drive
circuit

Variable
pulse
width
oscillator

Limiter
circuit

Differential
amplifier

High-voltage
transformer
T1

HVTON

CUR_LEV

GRDON

R5

T4

Q8

Q10

24V

Comparator

Q9

Q10

U1

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Summary of Contents for NP6317

Page 1: ...COPYRIGHT 1999 CANON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON REVISION 0 FY8 13G5 000 APR 1999 ...

Page 2: ...ON 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 confidential information Prepared by OFFICE IMAGING PRODUCTS TE...

Page 3: ...ranfer media 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 Chapter 7 Externals Auxiliary Mechanisms shows the copier s external parts and explains the principles used for the copier s various control mechanisms in view of the functions of electrical and mechanical uni...

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Page 5: ...ine of Electric Circuitry 2 2 C Inputs to DC Controller 2 4 D DC Controller Outputs 2 6 E Basic Sequence of Operations Direct Continuous Copying 2 sheets 2 9 I BASIC OPERATION 3 1 A Changing the Reproduction Ratio 3 1 II LENS DRIVE SYSTEM 3 2 A Outline 3 2 B Basic Lens Drive System Operation change of reproduction ratio 3 3 III SCANNER DRIVE SYSTEM 3 4 A Outline 3 4 B Relation Between Scanner Sens...

Page 6: ...B Operation 4 11 C Reading the Output of the AE Sensor 4 12 D Adjustment 4 13 VI DEVELOPING ASSEMBLY DRUM CLAENER 4 14 A Outlines 4 14 B Remaining Toner Sensor 4 14 C Torque Limiter 4 15 VII BLANKING 4 16 A Outline 4 16 B Movement of the Blank Exposure Mechanism 4 17 VIII DISASSEMBLY AND ASSEMBLY 4 19 A Main Motor Assembly 4 19 B Corona System 4 20 C Primary Transfer Corona Assembly 4 22 D Develop...

Page 7: ...D ASSEMBLY 7 3 CHAPTER 8 INSTALLATION CHAPTER 9 MAINTENANCE AND SERVICING A External Covers 7 4 B Control Panel 7 7 C Copyboard Cover 7 9 D Fans 7 9 E PCBs 7 11 I LOCATION 8 1 II UNPACKING AND INSTALLING THE COPIER 8 2 A Unpacking 8 2 B Mounting the Drum 8 4 C Checking the Operation 8 5 D Adding Toner 8 6 E Checking the Image 8 7 F Universal Cassette Code Setting 123 8 8 III RELOCATING THE COPIER ...

Page 8: ...aults 10 25 IV OPERATION TROUBLESHOOTING 10 37 A Troubleshooting of Malfunction 10 37 V TROUBLESHOOTING FEEDING PROBLEMS 10 56 A Paper Jams 10 56 VI INCORRECT PAPER FEED OPERATION 10 60 VII FUNCTION AND ARRANGEMENT OF THE ELECTRICAL PARTS 10 62 A Sensors Fuses and Lamps 10 62 B Clutches Solenoids Fans Motors and Heaters 10 63 C Switches Circuit Breakers Counters Etc 10 64 D PCBs 10 65 VIII SERVICE...

Page 9: ...ENERAL DESCRIPTION I FEATURES 1 1 II SPECIFICATIONS 1 2 A Type 1 2 B System 1 2 C Performance 1 2 D Others 1 3 III NAMES OF PARTS 1 5 A External View 1 5 B Cross Section 1 6 IV OPERATION 1 8 A Control Panel 1 8 B Daily Inspection to Be Performed by the User 1 10 V IMAGE FORMATION 1 11 A Outline 1 11 ...

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Page 11: ...tions of between 50 and 200 selectable in 1 increments 3 Front loading for faster supply of paper Paper is loaded from the front of the copier so that the cassette may be replenished with paper without wasting time The design also saves space Universal and its capacity is 500 sheets 4 Single component fine particle toner for high resolution Images are developed using the single component toner pro...

Page 12: ...00W Reproduction Charging Exposure Copy density adjustment Development Pick up Automatic Manual Transfer Separation Drum cleaning Fixing C Performance Sheet Book 3 D object 2 kg A3 max 25 sec approx at 20 C 9 4 sec A4 AE ON OFF 1 1 99 copies A3 max A6 min 148x105 mm Plain paper 64 to 80 g m2 Tracing paper Colored paper Plain paper 64 to 128 g m2 Tracing paper Colored paper OHP film Label sheet Typ...

Page 13: ...ound power level as prescribed by ISO 0 05ppm or less UL standards Others Weight Operating environment Ozone Dimensions Width Depth Height Temperature Humidity Atmospheric pressure Two sided copying Overlay copying Cassette Auto clear Auto shutoff Option Multifeed tray Multifeed tray Claw Standard Universal Copy tray Plain paper 64 to 128 g m2 Colored paper Plain paper 64 to 128 g m2 Colored paper...

Page 14: ...6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 1 4 Copies min 9 17 10 17 16 10 9 Cassette A3 A4 B4 B5 A5R A4R A3 Paper size A3 297x420mm A4 210x297mm B4 257x365mm B5 182x257mm A5R 210x149mm 50 A3 A4 A4 A3 200 I II I II REDUCE ENLARGE Reproduction mode DIRECT ...

Page 15: ...ass 2 Power indicator 3 Power switch 4 Right cover 5 Multifeeder tray 6 Developing assembly release lever 7 Developing assembly 8 Transfer separation assembly 9 Primary corona assembly cleaner 10 Feeder assembly release lever 11 Copy density knob 12 Fixing assembly knob 1 Copy tray 2 Copyboard cover 3 Control panel 4 Cassette 5 Front cover 6 Delivery cover 1 2 3 6 5 4 1 2 3 4 5 6 7 8 9 10 11 12 ...

Page 16: ...glass 6 Copyboard cover 7 Lens 8 Pre exposure lamp 9 Primary corona assembly 10 No 6 mirror 11 No 5 mirror 12 No 4 mirror 13 Multifeeder tray 14 Developing assembly 15 Feeder roller 1 16 Pick up roller 17 Registration roller 18 Transfer corona assembly 19 Photosensitive drum 20 Cassette 21 Feeder assembly 22 Exhaust fan 23 Fixing assembly 24 Delivery roller 15 24 23 22 21 20 19 18 17 16 14 10 4 2 ...

Page 17: ...CHAPTER 1 GENERAL DESCRIPTION COPYRIGHT 1999 CANON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 1 7 Blank Page ...

Page 18: ... GENERAL DESCRIPTION COPYRIGHT 1999 CANON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 1 8 IV OPERATION A Control Panel Figure 1 401 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 ...

Page 19: ...tio from 50 to 200 selectable in 1 increments Press to select or cancel Automatic Zoom To use Automatic Zoom your copier must be equipped with the optional Automatic Document Feeder ADF When copying using the stack bypass or a universal cas sette you cannot use Automatic Zoom Press to select the paper supply paper cassette or stack bypass Lights to show the selected paper supply paper cassette or ...

Page 20: ... in and out the wire cleaner to clean the corona wires 2 Copyboard Glass Clean the copyboard glass with a moist cloth then wipe it dry 3 Copyboard Cover Clean the copyboard cover with a mild detergent solution then wipe it dry 4 Transfer Corona Assembly Remove the transfer corona assembly from the copier then slide the knob wire cleaner at the bottom of the transfer corona assembly back and forth ...

Page 21: ...ep 5 Transfer negative DC Step 6 Separation Step 7 Fixing Step 8 Drum cleaning Figure 1 502 Developing assembly Scanning lamp Primary corona assembly Upper fixing roller Transfer corona assembly Static charge eliminator Upper fixing roller Cleaning roller Pre exposure lamp Drum cleaner Lens Copyboard glass Picture to be changed 1 register station only 2 Primary corona Copy delivery 7 Fixing Multif...

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Page 23: ...levant to the serviceman s work and therefore are left out of the discussions By the same token no repairs are prescribed for the PCBs at the user s premises for this reason PCBs are discussed by means of block diagrams rather than circuit diagrams For the purpose of explanation discussions are divided into the following from sensors to DC controller PCB input ports from DC controller output ports...

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Page 25: ...o sure system image formation system and control system Figure 2 101 Image tormation system Copy delivery assembly Paper delivery tray Paper pick up and feed system Exposure system Control system Control panel Control circuit Cleaning unit Pnimary corona Photosensi tive drum Multifeeder assembly Scanner Feeder Cassette Fixing assembly Copybord Optical system Pick up control assembly Developing ass...

Page 26: ... the analog signals 2 PROM Q301 contains the sequence program 3 EEPROM Q317 stores data that can be modified in the service mode replaces conventional variable resistors and switches Note EEPROM is a type of ROM in which data may be erased or stored newly For this reason the NP 6317 s RAM and RAM are not backed up by a lithium battery Note The NP 6317 is equipped with an A D converter and therefor...

Page 27: ...Cassette size sensor Right door switch AE sensor Black toner level sensor Conntrol panel Scanner motor Thermistors PROM Q301 Microprocessor Sorter controller PCB EEPROM Q317 Mirror motor Lamp regulator Scanning lamp AC driver DC power supply PCB Fixing roller heater Main motor HVT Primary Transfer corona assembly Developing bias GND bias Multifeeder solenoid Blank solenoid Pick up clutch solenoid ...

Page 28: ...s at home position 1 light blocking plate is at Q5 Scanner home position sensor 5V Q5 3 4 J33 1 J312 9 2 8 LHP when lens is at home position 1 light blocking plate is at Q6 Lens home position sensor 5V Q6 3 7 J26 1 J303 7 2 6 CPEP when paper is in cassette 1 light blocking plate is at Q7 Cassette paper sensor 5V Q7 3 5 J801 1 J312 3 2 2 MHP when mirror motor is at home position 1 light blocking pl...

Page 29: ...Reads the cassette size see p 3 32 The voltage lowers as the fixing heater temperature rises Cassette size sensor Thermistor 1 main CST SW3 TH1 NTC1 5V 4 3 4 J317 4 TH1 3 3 Thermistor 2 auxiliary TH2 NTC2 TS1 AE J45 1 J317 1 TH2 2 2 CSZ2 5 4 CSZ3 6 5 CSZ4 J39 3 J303 3 Black toner leveol sensor AE sensor 2 2 BTEP 1 1 2 1 oscillation signal See p 3 25 24V J701 4 J312 13 2 11 AE 3 12 1 24V 10 AEGIN ...

Page 30: ...nit PWOFF when 0 AC power OFF main switch when 0 main motor is moving when 1 See p 3 9 main motor ON 24V J305 6 3 LAMP CHECK 4 2 ZERO CROSS 5 LIGHT LAMP SHIFT J201 1 2 1 J202 3 1 J203 1 4 3 5 2 6 Lamp driver unit Scanning lamp F2 LA2 Scanner motor M2 See p 3 9 See p 3 20 1 J4 1 HTRD when 1 fixing roller heater ON Fixing roller heater Thermoswitch 1 Thermoswitch 2 LA1 F1 2 DS1 SW1 Noise filter 24V ...

Page 31: ...r Outputs 2 3 Figure 2 106 DC controller PCB 24V SL1 Pick up clutch solenoid J307 5 6 PUSD when 0 SL1 ON 2 10 8 4 24V SL2 Lens drive solenoid J309 1 LNSD when 0 SL2 ON 24V SL3 Multifeeder solenoid J311 9 MFSD when 0 SL3 ON 24V SL4 Blank solenoid J307 7 BLSD when 0 SL4 ON 24V CL1 Registration roller clutch J307 3 RGCD when 0 CL1 ON ...

Page 32: ...unter H V T J309 1 FM1D when 0 FM1 ON 3 24V FM2 Exhaust fan J311 1 FM2D when 0 FM2 ON when 0 Total counter operates 2 24V J307 1 1 J731 2 PEXP when 0 Pre exposure lamps ON See p 4 5 J315 10 J501 1 J503 11 J316 1 J503 10 J506 3 2 J505 1 2 1 Control panel PCB DNST The voltage changes according to the volume setting Power indicator PCB CCV Density volume PCB 5V 5V 5V J504 2 4 3 1 2 J315 J316 J501 J50...

Page 33: ...ime varies with fixing roller tem perature at power ON When the COPY START key lights green After the WMUPR pe riod ends the READY WAIT indicator changes from flashing green to green Even when the fixing roller has warmed up it rotates for at least 4 2 sec A PAPER FEED signal is generated to feed first sheet of copy paper Purpose Allows time for fixing roller to warm up Keeps fixing roller tem per...

Page 34: ...the reflected optical image is transmitted to photo sensitive drum through mirrors and lens array The scanner is moved back to HOME position to prepare for the next copy Ensures full discharge of the last copy Waits until the COPY START key is pressed From when the scanner moves forward about 70 mm from the end of the image until it returns to its home position When the scanner is mov ing forward ...

Page 35: ...to the screw when removing fitting it 5 If possible avoid operating the machine with any of its parts removed 6 Unless otherwise noted re assembly is the reverse of disassembly I BASIC OPERATION 3 1 A Changing the Reproduction Ratio 3 1 II LENS DRIVE SYSTEM 3 2 A Outline 3 2 B Basic Lens Drive System Operation change of reproduction ratio 3 3 III SCANNER DRIVE SYSTEM 3 4 A Outline 3 4 B Relation B...

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Page 37: ...the speed of the scanner Figure 3 101 shows how the position of the lens and mirror is varied to change the reproduction ratio across the drum Figure 3 101 The scanner drive system changes the reproduction ratio around the drum by varying the speed at which mirror 1 moves relative to the peripheral speed of the drum The scanner consists of mirror 1 and the scanning lamp The mirror speed is higher ...

Page 38: ...hanges are intended to optimize lens sharpness for each reproduction ratio not to make the lens function as a zoom lens The lens should not be dismantled When the scanner motor rotates CW the lens will be moved to the left for ENLARGE MENT by the capstan and cable When the paper size is changed or when the copier is in the REDUCE mode the blank expo sure shutter moves in relation to the distance o...

Page 39: ...ns first returns to the home position before moving to the position that corresponds to the cassette size and the reproduction ratio This operation is executed also when the ZOOM mode is switched to the DIRECT mode copy start key ON STAND BY INITIAL ROTATION AE ROTATION SCAN FORWARD Scanner home position sensor Q5 Scanner motor M2 Scanner movement Lens solenoid SL2 Lens movement Lens home position...

Page 40: ...peed is fixed regardless of the reproduction ratio 2 5 times the forward speed for DIRECT copying The distance that the scanner moves varies to suit the size of copy paper and the reproduction ratio The control panel displays E202 in response to an error in the scanner motor M2 or the scanner home position sensor Q5 Figure 3 301 Signal generating plate Mirror 2 mount Scanner home position sensor Q...

Page 41: ...7 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 5 B Relation Between Scanner Sensor and Signals Table 3 301 Meaning Grid bias ON After 0 1 sec the scanner stops advancing Scanner sensor Scanner home position sensor Q5 Signal name SCHP Scanner Forward Reverse ...

Page 42: ...PRINTED IN JAPAN IMPRIME AU JAPON 3 6 C Basic Scanner Operation Figure 3 302 POWER switch ON WMUP COPY START key ON SCRV SCRV STBY INTR SCFW SCFW AER LSTR Forward Scanner home position sensor Q5 signal Pre registration paper sensor Q2 signal Scanner movement Scanning lamp Reverse ...

Page 43: ... roughly the same as I If the forward distance traveled by the scanner is greater than 210 mm 220V or 240V copier the DC controller will judge that 210 mm is the leading edge of the original If the distance that the scanner moves forward is less than 210 mm the point at which the scanner reverses in I will be the leading edge of the second page of the document III Same as I Scanner home position s...

Page 44: ... M3 and its position is monitored by the mirror home position sensor Q4 The mirror is positioned with reference to the number of motor pulses counted from the mirror home position When the power is turned on the mirror motor M3 continues to rotate clockwise until the mirror home position sensor Q4 turns on Thereafter it rotates counterclockwise for a specific number of pulses to stop the No 4 5 mi...

Page 45: ...B are gener ated by Q300 of the DC controller PCB on the other hand the motor select signal MIRRCOM SCNCOM is generated by Q300 and Q303 The motor selected by the motor select signal is controlled for direction and speed by the pulse signals from Q300 Figure 3 402 Q323 Q320 5V 24V Q325 J303 Q325 Q325 Q325 MIRRA MIRRCOM MIRRA Mirror motor COM MIRRA MIRRB MIRRB MIRRB DC controller PCB Q300 CPU 5 Q31...

Page 46: ... CANON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 3 10 Figure 3 403 100 to 70 setting 70 to 50 setting 50 to 200 setting Mirror HP sensor Q4 Mirror motor M3 Lens HP sensor Q6 Scanner motor M2 motor foward motor reverce ...

Page 47: ...ON 3 11 V DISASSEMBLY AND ASSEMBLY A Lens Drive Assembly 1 Outline The unit is adjusted at the factory with high precision using special tools Do not re move parts or loosen screws other than those discussed Cable fixing Mounting screws Pulley mount Lens pully fixing plate Lens pully 4 turns 4 3 2 Figure 3 501 ...

Page 48: ...etaching the Lens Cable 1 Detach the copyboard cover copyboard glass lens cover rear cover and upper rear cover 2 Remove the three screws shown in Figure 3 502 and detach the upper frame 3 Mark the position of the pulley mount and the cable mount using a scriber 4 Remove the two screws that hold the pul ley mount in place 5 Detach the cable 1 ...

Page 49: ... the two screws that hold the lens pulley mount in place and detach the lens pulley see Figure 3 501 2 Wind the lens cable around the lens pulley as shown in Figure 3 504 then fix it us ing two screws 3 Shift the pulley mount to the position marked with a scriber and fix it in place using two screws 3 2 1 1 Screws 2 Pulley 3 Pulley mount Figure 3 503 ...

Page 50: ...f the mount and loosen screws B 2 pcs which hold the mount in place 2 Loosen screw A 1 pcs and detach the scanner cable 2 Attaching the Scanner Cable 1 Route the scanner cable as shown in Fig ure 3 504 2 Position the fixing plate where a mark has been put using screw A 3 Tighten screws B Lower groove of the pulley Scanner pulley 1 4 2 6 Top groove of the pulley 6 3 Pulley 2 Screw A Screws B Mark t...

Page 51: ...will become out of focus 1 Draw a line 1 cm from both ends of copy paper A4 or A3 as shown in Figure 3 505 2 Make a copy of the sheet on which lines have been drawn call the copy obtained this way sheet A 3 Place a blank sheet of paper on the copyboard and feed the sheet on which lines were drawn in the manual mode call the delivered sheet sheet B Sheet B will show contraction by heat 4 Put the le...

Page 52: ...e No 6 Mirror 1 Detach the drum cartridge developing as sembly and dustproofing glass 2 Put the mirror cleaning tool against the mirror as shown in Figure 3 509 and clean the lens by sliding it back and forth Use the upper registration roller as a refer ence for sliding back and forth 6 Lubricating Clean the scanner rail then apply lubri cant evenly over it No 6 mirror Mirror cleaning tool ...

Page 53: ...3 Remove the two screws and detach the anti glare plate 4 Push the lamp terminal plate rear into the direction of the arrow and detach the scanning lamp Note i Wait until the scanning lamp has cooled before starting the work ii Do not leave fingerprints on the scan ning lamp iii Dry wipe the scanning lamp if it is soiled 1 2 2 1 1 Screws 2 Anti glare plate Figure 3 510 1 Lamp terminal plate rear 2...

Page 54: ...mirror mount Figure 3 512 2 Detaching the Thermal Fuse 1 Detach the control panel and the copyboard glass 2 Hold the rear of the No 1 mirror mount and move it to the right until it is posi tioned as shown in Figure 3 512 Note When moving the No 1 mirror mount be sure to hold its right side 3 Remove the two screws and detach the thermal fuse 1 3 2 1 ...

Page 55: ...are not to damage the PCB 2 Detaching the Blank Assembly 1 Detach the copyboard glass lens cover lens motor cover rear cover and drum unit then detach the developing assem bly 2 Disconnect the connector J731 from the pre exposure PCB and the connector J30 from the blank solenoid 3 Holding the blank assembly on its bottom and remove the four screws then pull out the pre exposure lamp to the front 2...

Page 56: ... PRINTED IN JAPAN IMPRIME AU JAPON 3 20 A A A 1 E No 4 5 Mirror Mount The screws A that keeps the No 4 5 mir ror mount 1 to the lens base plate must not be loosened in the field If they are loosened re adjusting the mirror mechanical axis is not possible in the filed Figure 3 516 ...

Page 57: ...FF 4 5 C Maintaining Primary Transfer Corona Current Constant 4 6 D Controlling Grid Bias Voltage 4 7 IV CONTROLLING DEVELOPING BIAS 4 8 A Outline 4 8 B Operation 4 9 V DOCUMENT DENSITY MEASUREMENT SYSTEM 4 11 A Outline 4 11 B Operation 4 11 C Reading the Output of the AE Sensor 4 12 D Adjustment 4 13 VI DEVELOPING ASSEMBLY DRUM CLAENER 4 14 A Outlines 4 14 B Remaining Toner Sensor 4 14 C Torque L...

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Page 59: ...ensity measurement system Developing assembly drum cleaning system Blanking system Figure 4 101 Scanning lamp AE sensor Lamp driver unit Lens High voltage transformer HVT DC controller PCB GRID ON signal GRDON Blank exposure shutter Pre exposure lamp Photosensitive drum HVTON command HVTON ACBON DCBC DC BIAS control command GRID BIAS control signal GRBC AC BIAS ON command PEXP PRE EXPOSURE LAMP DR...

Page 60: ...evelop ing assembly 2 copies Figure 4 102 ON WMUPR WMUP COPY START key SCRV SCRV STBY INTR SCFW SCFW AER LSTR STBY Main motor M1 pre exposure lamp Scanner movement Scanner home position sensor Q5 signal Scanning lamp LA1 Primary transfer corona assembly Forward Grid bias ON OFF Developing bias DC component Developing bias AC component LIGHT INTENSITY CONTROL command Backward ...

Page 61: ...17 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 4 3 II CONTROLLING THE SCANNING LAMP A Outline The scanning lamp LA1 is controlled by the DC controller PCB Specifically the DC controller turns the scanning lamp ON and OFF controls the intensity of the scanning lamp ...

Page 62: ... bias see p 10 18 3 Error Protection The condition of the scanning lamp is monitored using the lamp check signal If the lamp check signal is received by the DC controller even when the lamp is off the error detection circuit generates the AC SHUTOFF signal to force the relay K100 on the AC driver DC power supply PCB to go OFF thereby cutting AC power supply p 3 39 In this case E220 error is displa...

Page 63: ...corona grid bias voltage 4 Switching primary corona grid bias ON OFF In order to eliminate the effect of changes in atmospheric conditions on the effectiveness of the corona discharge the current to the primary corona wire is maintained constant The primary corona and transfer corona currents are switched ON and OFF by the HVT ON command HVTON The grid bias voltage is switched by the GRID ON signa...

Page 64: ...ill fall As a result the primary transfer corona current will fall Similarly if the primary corona current is too low it will be increased If the output side of the high voltage transformer supplying the primary corona assembly should be overloaded the current will be limited to a certain maximum Figure 4 301 Microprocessor DC controler PCB High voltage transformer HVT OVER Primary corona assembly...

Page 65: ...the grid The surface of the drum is charged The voltage applied to the grid is fixed by the shield current b When scanning is not taking place the DC controller PCB output GRDON is 1 and CUR LEV is 1 Q9 goes OFF and the comparator circuit output is 1 Q8 goes ON and current flows into T4 Bias is not applied to the grid Under the above conditions the surface of the drum is not charged hence toner do...

Page 66: ...f the developing bias The copy density can be controlled by varying the voltage of the developing bias to suit the following variables 1 Setting of the COPY DENSITY lever and recalibration dial 2 AE sensor output The photosensitive drum gradually deteriorates with use causing the potential VL of light areas of the drum to increase causing the copy density to be incorrect for a given setting of the...

Page 67: ...ch circuit goes ON Output from the square wave generator is cut off As a result AC bias is not supplied to the developing cylinder b When ACBON 0 The AC bias switch circuit goes OFF As a result the output of the square wave oscillator goes to the T1 drive circuit This causes the AC high voltage transformer to generate a 1300V AC bias which is supplied to the developing cylinder Also the output of ...

Page 68: ...ensity knob changes the DC component of the developing bias as shown in Figure 4 401 Figure 4 401 Changes in Development Bias DC component by COPY DENSITY Knob Figure 4 402 AE sensor COPY DENSITY knob COPY DENSITY lever 24V 24V T3 drive circuit T2 drive circuit Variable pulse width oscillator Differential amplifier Q1 ACBON Microprocessor DC high voltage transformer T3 Static charge eliminator Dev...

Page 69: ...developing bias to suit the density of the original so that copies of the correct density will be made B Operation The scanner moves forward approximately 70 mm past the leading edge of the original and stops momentarily The scanning lamp goes ON for approximately 1 sec the image density is read by the AE sensor and the sensor output is interpreted by the DC controller The DC controller then adjus...

Page 70: ... AE of the amplifier will be small If the amount of light is small the output voltage will be large The DC controller reads the output at a certain time after the zero cross signal ZXDP is received from the DC power supply The data representing the adjusted AE reference slope values are written to EEPROM when C0 or C1 is used in the service mode Figure 4 502 DC controller PCB EEP ROM Q315 AE J700 ...

Page 71: ... the scanning lamp will go ON Note 6 Adjust VR 301 on the DC controller so that 22 appears on the COPY COUNT RATIO indi cator Figure 4 503 7 Press the SORT GROUP key The scanning lamp will go OFF and the scanner will return to the HOME position 8 Remove the test sheet place a sheet of newspaper on the copyboard and lower the copyboard cover 9 Press the SORT GROUP key The copier will perform the sa...

Page 72: ...embly release lever B Remaining Toner Sensor The black developing assembly has a piezoelectric type sensor TS1 which senses if the toner remaining in the hopper of the developing assembly is above or below the required level When the amount of toner in the developimg assembly is sufficient the sensor output is 1 When it is below the specified level the output is 0 The DC controller PCB checks for ...

Page 73: ... 1999 CANON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 4 15 C Torque Limiter There is a torque limiter in the drive train between the main motor and the drum used to stop the drum in response to a jam in the drum cleaner ...

Page 74: ... and attract toner if a preventive measure were not taken This measure is to switch the primary corona OFF and the primary corona assembly grid bias ON When the copy cassette size is a non default size or when the copier is in the REDUCE mode the light from the pre exposure lamp is directed to the photosensitive drum by way of the reflecting plate to prevent adhesion of toner the blank exposure sh...

Page 75: ... in the direction of reduction for blank expo sure up to a point that corresponds to the cassette size At the time the blank solenoid goes ON and the blank exposure shutter moves in the direction of the arrow by the force of a spring Figure 4 701 Figure 4 702 Spring Blank exposure shutter front Blank solenoid SL4 ON Cam Exposure window Direction for reproduc tion ratio of 99 Direction for reproduc...

Page 76: ...r has moved to a cut out to fix the shutter in position cut offs are provided for each cassette size DIRECT and ENLARGE copies are made with the mechanism in this position Figure 4 703 3 When the REDUCE mode is selected the lens first returns to the home position and then moves to a position that corresponds to the selected reduction ratio At the time the blank exposure shutter is moved over a dis...

Page 77: ... IN JAPAN IMPRIME AU JAPON 4 19 VIII DISASSEMBLY AND ASSEMBLY A Main Motor Assembly 1 Detaching the Main Motor 1 Detach the rear cover 2 Disconnect the connector J651 from the mian motor 3 Remove the four screws and detach the main motor 1 Connector J651 2 Screw 3 Main motor Figure 4 801 2 1 3 2 ...

Page 78: ... Drum Unit 1 Open the front door 2 Release the feeder assembly and remove the screw 3 Turn the developing assembly release le ver counterclockwise 4 Pull out the drum unit to the front care fully Note Take care not to damage the drum Note The photosensitive drum is susceptible to light exposure to even room light can lead to white spots or black lines on the copies As a rule do not switch the copi...

Page 79: ...7 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 4 21 b Cleaning If the photosensitive drum is soiled clean it using a flannel cloth coated with toner do not use paper lint free or otherwise Note Do not use solvent or dry wipe the drum and never use drum cleaning powder ...

Page 80: ...na assembly is equipped with a grid plate 2 Disassembly Assembly a Primary Corona Assembly 1 Detach the drum unit Note Do not expose the photosensitive drum to strong light otherwise white spots or black lines can occur on the copies 2 Disengage the hook and pull out the pri mary corona assembly from the drum unit b Transfer Corona Assembly Gut Wire and Static Eliminator 1 Detach the transfer coro...

Page 81: ...ia and form a loop at its end about 2 mm in diameter Note Wind the corona wire around a hex key once and turn the hex key four to five times then twist it to form a loop 4 Cut the twisted end of the corona wire to about 1 mm or less using a nipper 5 Hook the loop of the corona wire as shown in Figure 4 807 and lead the wire along the V groove of the height adjusting roll 6 Hook the corona wire ten...

Page 82: ... Pick the end of the corona wire tension spring using tweezers and hook it on the corona terminal Note i Make sure that the corona wire is free of breaks or twists and its gold plat ing has not peeled ii Make sure that the corona wire is not slack normal if the length of the co rona wire tension spring is 12 mm iii Make sure that the corona wire is in the V groove of the height adjusting roll ...

Page 83: ...ly a Construction b Detaching the Developing Assembly 1 Turn the developing assembly release le ver counterclockwise 2 Slide out the developing assembly care fully 3 Hold the grip on the developing assembly and take the assembly out the copier 1 2 Magnetic side seal Magnetic cylinder Figure 4 808 1 Developing assembly release lever 2 Developing assembly Figure 4 809 ...

Page 84: ...g the Blade Developing Cylinder and Side Seal 1 Detach the developing assembly from the copier 2 Remove the screw and detach the upper cover fixing plate 3 Detach the top cover 4 Remove the two screws and detach the developing assembly upper cover 5 Place a newspaper on the floor and pour out the toner from the developing assem bly 6 Remove the two screws and detach the blade mount together with t...

Page 85: ...the hook on the bottom and detach the grip 8 Remove the three screws and detach the developing cylinder holder front ball bearing and developing roll 9 Remove the two E rings and remove the two gears 1 2 2 1 3 1 2 1 2 1 Hook 2 Grip Figure 4 812 1 Screws 2 Developing cylinder holder 3 Spacer roll Figure 4 813 1 E rings 2 Gears Figure 4 814 ...

Page 86: ...E AU JAPON 4 28 1 Screws 2 Developing cylinder holder 3 Ball bearing 4 Spacer roll Figure 4 815 Figure 4 816 10 Remove the two screws and detach the developing cylinder holder rear ball bearing and spacer roll 11 Detach the developing cylinder and side magnetic seal 1 2 4 3 Magnetic side seal Magnetic cylinder ...

Page 87: ...l be hooked using alcohol 2 Fix the side magnetic seal at the position shown in Figure 4 819 Note Put the hook of the magnetic side seal on its side on plastic marking so that the magnetic side seal is firmly in the correct position i i Attach the seal so that the long hole at its end is matched with the round hole of the developing assembly housing Side seal Butted Magnetic side seal Magnetic cyl...

Page 88: ...embled with the longer tooth in the groove 4 Force the blade mount against the devel oping assembly in the direction of the ar row and tighten the two screws 5 Loosen the four screws that hold the blade on the blade mount and tighten them back Note Do not loosen the screws excessively or the blade may come off the positioning pin found at the center a b Magnetic side seal Magnetic cylinder Figure ...

Page 89: ...ASSEMBLY AND FEEDER 5 1 A Outline 5 1 B Pick up and Feeder Operation 5 3 C Identifying the Paper Size 5 4 D Pick Up from the Multifeeder 5 5 II JAM DETECTION 5 7 A Pick up Assembly Delay Jam 5 8 B Delivery Assembly Stationary Jam 5 9 C Delivery Assembly Delay Jam 5 10 III FEEDER SYSTEM 5 11 A Pick up Assembly 5 11 B Feeder Assembly 5 17 ...

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Page 91: ...ing edge is in line with the leading edge of the toner image on the photosensitive drum It then passes through the transfer separation feed fixing and delivery stages to the copy tray The copy paper is sensed by paper sensor Q2 and Q5 If it does not reach or pass the sensors within the specified period the DC controller PCB judges that a jam has occurred and causes the JAM indicator on the control...

Page 92: ...99 PRINTED IN JAPAN IMPRIME AU JAPON 5 2 Figure 5 102 CL1 SL3 M1 SL1 DC controller PCB Multifeeder solenoid drive command Cassette paper detection signal Registration paper detection signal Delivery paper detection signal Registration clutch drive command Pick up clutch drive command ...

Page 93: ... AU JAPON 5 3 B Pick up and Feeder Operation Figure 5 103 ON COPY START key SCRV SCRV STBY INTR SCFW SCFW AER LSTR STBY Main motor M1 Scanner home position sensor Q5 signal Pick up clutch solenoid SL1 Registration roller clutch CL1 Pre registration paper sensor Q2 signal Delivery paper sensor Q8 signal Counter ...

Page 94: ... which have been actuated the microprocessor recognizes the presence absence of a cassette as shown in Tables 5 101 and 5 102 and at the same time determines where to reverse the scanner and how to control the blank shutter Table 5 101 In case of the universal cassette U the cassette size is selected by service mode No 23 ac cording to Table 5 102 Table 5 102 Service 23 Size 0 B4 1 B5 2 B5R 3 LETT...

Page 95: ...solenoid turns off A specific time Note 1 after the leading edge of paper has reached the pre registration sensor the multifeeder solenoid turns on once again causing the claw 2 to engage with the control ring gear and ultimately stopping the control ring The multifeeder solenoid turns off once again as soon as the registration roller starts to rotate This causes the claw 2 to disengage from the c...

Page 96: ...V 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 5 6 Copy Start key ON STAND BY INITIAL ROTATION SCAN FORWARD SCAN REVERSE Multifeeder paper sensor Q1 Main motor M1 Pre registration paper sensor Q2 Multifeeder solenoid SL3 Registration roller clutch CL1 Paper set Figure 5 105 ...

Page 97: ...ermined times In relation to the presence absence of paper at a sensor at that time it identifies if paper is moving through the copier correctly If a jam occurs the copier memorizes the number of copies that are still to be made and also the copier settings This information is stored in the copier even if the power is cut off by opening the front door as when resetting the copier The microprocess...

Page 98: ...o the JAM indicator on the control panel will flash and a segment of the PAPER SELECT JAM indicator will go ON 1 Multifeeder Figure 5 201 multifeeder pick up assembly delay jam 2 Cassette Figure 5 202 cassette pick up assembly delay jam COPY START key ON SCRV STBY INTR SCFW SCFW Multifeeder solenoid SL3 JAM check Pre registration paper sensor Q2 signal Main motor M1 1 sec 1 sec Normal JAM indicato...

Page 99: ... operates the microprocessor will judge that a delivery unit stationary jam has occurred and immediately stop the operation of the copier Also the JAM indicator on the control panel will flash and a segment of the PAPER SELECT JAM indicator will go ON Figure 5 203 Delivery Assembly Stationary Jam A4 size COPY START key ON SCRV SCRV INTR SCFW SCFW Registration roller clutch CL1 Jam check Delivery p...

Page 100: ...L1 has operated the microprocessor will judge that a delivery assembly delay jam has occurred and immediately stop the operation of the copier Also the JAM indicator on the control panel will flash and a segment of the PAPER SELECT JAM indicator will light Figure 5 204 Delivery Assembly Stationary Jam A4 size COPY START key ON SCRV SCRV INTR SCFW SCFW Registration roller clutch CL1 Jam check Deliv...

Page 101: ...PON 5 11 III FEEDER SYSTEM A Pick up Assembly 1 Detaching the U Guide Plate 1 Detach the inside cover right cover and rear cover then detach the right door 2 Disconnect the connector 3 Remove the pick up roller assembly 4 Remove the E ring and slide the bush 1 2 1 1 Connector Figure 5 301 1 E ring 2 Bush Figure 5 302 ...

Page 102: ...SYSTEM COPYRIGHT 1999 CANON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 5 12 5 Remove the E ring and slide the bush 6 Detach the U guide plate 2 1 1 1 E ring 2 Bush Figure 5 303 1 U guide plate Figure 5 304 ...

Page 103: ...ly 1 Detach the cassette the inner cover the rear cover and the right cover 2 Detach the pick up roller bushing found at the front 3 Remove the power supply unit and the noise filter 4 Detach the control ring from the pick up roller shaft 5 Detach the pick up roller bushing found at the rear 1 Bushing Figure 5 305 1 Control ring Figure 5 306 1 Bushing Figure 5 307 1 ...

Page 104: ...14 Cut off Base plate 1 1 Pick up roller assembly Figure 5 308 1 Cut off 2 Base plate Figure 5 309 6 Shift the pick up roller assembly to the rear and detach the pick up roller shaft from the front door cassette area Note When attaching the pick up roller as sembly the cut off of the sliding bush must match the base plate ...

Page 105: ...ick Up Roller 1 Remove the pick up roller assembly 2 Remove the front pick up roller 4 Detach the Rear Pick up Roller from the Sliding Bush 1 Remove the pick up roller assembly 2 Bend the rib of the pick up roller 3 Pull the pick up roller out of the support 1 Front pick up roller Figure 5 310 1 Rib 2 Pick up roller Figure 5 311 1 1 2 ...

Page 106: ... 5 312 1 Feed guide Figure 5 313 1 Mutlifeeder pad Figure 5 314 5 Detaching the Multifeeder Roller 1 Detach the right door 2 Remove the E ring and remove the multifeeder roller together with its shaft 6 Detaching the Multifeeder Pad 1 Detach the right door 2 Remove the multifeeder roller 3 Detach the feed guide 4 Remove the multifeeder pad from the bush 1 2 1 1 ...

Page 107: ...bly have been detached before detaching the feeder assembly 1 Release the feeder assembly 2 Detach the DC contoroller PCB 3 Remove the E ring and detach the bush ing 4 Detach the inside cover and remove the E ring then detach the bushing 5 Disconnect the connector and detach the grounding wire 1 screw then detach the cord mount 1 screw 1 E ring 2 Bushing Figure 5 315 1 E ring 2 Bushing 3 Grounding...

Page 108: ...T 1999 CANON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 5 18 6 Hold the side of the feeder assembly closer to the fixing assembly and pull it out toward the front slowly as if to lift it 1 Feeder assembly Figure 5 317 1 ...

Page 109: ...PRIME AU JAPON 5 19 2 Feeder Belt 1 Detach the feeder assembly 2 Remove the two screws and detach the rail cover found at the front 3 Remove the two screws found at the front that hold the corona assembly rail in place 1 Screws 2 Rail cover Figure 5 318 1 Screws 2 Corona assembly rail Figure 5 319 2 1 1 2 ...

Page 110: ... AU JAPON 5 20 4 Remove the two screws and detach the terminal holder found at the rear 5 Remove the two screws found at the rear and detach the corona assembly rail 6 Detach the feeder belt 1 Screws 2 Terminal holder Figure 5 320 1 Screws 2 Corona assembly rail Figure 5 321 1 Feeder belt Figure 5 322 1 2 2 1 1 ...

Page 111: ...NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON I BASIC OPERATIONS 6 1 A Outline 6 1 B Operation of Fixing Assembly Temperature Control System 6 3 CHAPTER 6 FIXING SYSTEM III DISASSEMBLY AND ASSEMBLY 6 4 A Fixing Assembly 6 4 ...

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Page 113: ...ommand HTRD to go 1 or 0 The copier is provided with the following three protection mechanisms The microprocessor monitors the voltage of TH1 and TH2 and indicates E000 or E001 in response to an error i e ACOFF goes 0 to turn the relay K100 OFF thereby cutting the AC power to the fixing heater The fixing roller error detection circuit monitors the voltage of TH1 and TH2 and when it drops below 0 9...

Page 114: ... 101 M1 Main motor DC controller PCB Power supply assembly Microprocessor Q300 Error detection circuit 24V 5V J318 1 J317 2 TH1 Thermistor 1 MTH H1 900W Fixing roller heater Upper fixing roller Delivery rollers Lower fixing roller Thermoswitch F1 230 C 1 J317 4 TH2 Thermistor 2 AUXTH 3 J318 3 HTRD HTPT J318 2 HTON 24V K100 ...

Page 115: ...nse to a press on the STANDBY key the fixing tem perature is controlled to 155 C Power switch ON WARM UP 50 C 110 C COPY START key ON COPY START key indicator Fixing roller heater H1 Exhaust fan FM2 195 C 180 C 155 C 110 C 50 C 0 C Main motor M1 Scanner cooling fan FM1 WARM UP ROTATION STAND BY SCANNER FORWARD SCANNER REVERSE Blinks green Glows green Glows red SCANNER FORWARD SCANNER REVERSE LAST ...

Page 116: ...DISASSEMBLY AND ASSEMBLY A Fixing Assembly 1 Construction 2 Detaching the Fixing Assembly 1 Remove the screw and detach the fixing assembly knob Figure 6 201 1 Screw 2 Fixing assembly knob Figure 6 202 Upper separation claw Lower separation claw Cleaning roller Upper roller Heat sink roller Lower roller Paper guide 2 1 ...

Page 117: ...PRIME AU JAPON 6 5 2 Remove the three screws and detach the blanking plate and the left cover 3 Disconnect the three connectors 4 Remove the two screws and slide out the fixing assembly 1 Screws 2 Blanking plate 3 Left cover Figure 6 203 1 Connectors Figure 6 204 1 Screws Figure 6 205 1 1 3 2 1 1 ...

Page 118: ... 2 Pull out faston A See Figure 6 207 and remove the two screws the heater mount plate front can be detached in this condi tion 3 Pull faston B and remove the mounting screw from the heater mount plate found at the rear then pull out the heater mount plate rear and the heater carefully 1 Screw 2 Heater mount plate front Figure 6 206 1 Screw 2 Heater mount plate rear 3 Heater 4 Faston A 5 Faston B ...

Page 119: ...e the two screws and detach the thermistor cover 5 Remove the screw and detach the ther mistor mount 6 Remove the screw and detach the thermal switch mount 7 Remove the C ring at the rear and detach the gear 1 Screws 2 Thermistor cover Figure 6 208 1 Screw 2 Thermistor mount 3 Thermal switch mount Figure 6 209 1 C ring 2 Gear Figure 6 210 ...

Page 120: ...ws and detach the bushing Note The bushing is pushed up from below If it is difficult to detach try pushing the upper fixing roller to the bottom to fa cilitate detachment 11 Push the pressure spring of the lower fix ing roller using a screwdriver and detach the upper fixing roller 12 Detach the lower fixing roller 1 E ring 2 Gear A 3 C ring 4 Gear B Figure 6 211 1 Screw 2 Bushing Figure 6 212 1 S...

Page 121: ...in detaching them but in reverse order while noting the following a Heater i Do not touch the surface of the heater ii Make sure that the end showing the manufacturer s name is to the front b Upper Fixing Roller i Wrap the roller with copy paper to pre vent soiling or scarring its surface ii Make sure that the end with two C rings is to the rear iii Make sure that the two identical gears are used ...

Page 122: ...b Measuring Procedure 1 Open the copyboard cover and make a A3 size solid black copy 2 Set the solid black copy to the multi feeder 3 Select service mode C13 3 1 Detach the VR cover from the rear of the left cover 3 2 Press the service switch SW300 on the DC controller PCB 3 3 Select service mode C13 using 10 key or the zoom key 4 Press the COPY START key The solid black paper is automatically pic...

Page 123: ...en contact with the surface of the upper fixing roller Note The position of the thermistor need not be adjusted if the contact is not even make sure that the thermistor spring is not deformed 7 Attaching the Thermoswitch Make sure that the sensor face of the thermoswitch is in even contact with the sur face of the upper fixing roller Note The position of the thermoswitch need not be adjusted if th...

Page 124: ...has been de tached the position of the paper guide must be adjusted To avoid this do not loosen the screw on the paper guide if necessary mark the position on the fix ing assembly mount using a scriber Note To adjust the position of the paper guide place the fixing assembly on a desk and move the paper guide so that the position is as shown Figure 6 217 9 Detaching the Clearing Roller 1 Open the d...

Page 125: ...E AU JAPON 6 13 2 1 1 10 Detaching the Upper Separation Claw 1 Open the delivery assembly 2 Detach the cleaning roller 3 Remove the three screws and detach the upper separation claw assembly 4 Remove the spring and detach the upper separation claw 1 Screw 2 Upper separation claw assembly Figure 6 219 ...

Page 126: ...s de taching it but in reverse order with the follow ing in mind a Make sure that the boss on the upper sepa ration claw is in contact with the mount as shown in Figure 6 220 b Make sure that the upper separation claw assembly is fully toward the rear If a scratch is noted on the upper fixing roller move the upper separation claw assembly about 4 mm toward the front Figure 6 220 Figure 6 221 ...

Page 127: ...NON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 6 15 1 12 Detaching the Lower Separation Claw 1 Open the delivery unit 2 Slide the lower separation guide plate 1 to remove 3 Remove the spring and remove the lower separation claw Figure 6 222 ...

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Page 129: ...1999 PRINTED IN JAPAN IMPRIME AU JAPON I POWER SUPPLY 7 1 A AC Driver DC Power Supply 7 1 II DISASSEMBLY AND ASSEMBLY 7 3 CHAPTER 7 EXTERNALS AUXILIARY MECHANISMS A External Covers 7 4 B Control Panel 7 7 C Copyboard Cover 7 9 D Fans 7 9 E PCBs 7 11 ...

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Page 131: ...ived by a step down circuit from the 24V DC output The S M P S and the step down circuit are provided with an overcurrent and overvoltage pro tection mechanisms and are used to maintain the output voltage stable against line load variations 3 AC Drive Circuit The DC power supply AC drive PCB has an AC driver circuit and based on the signals from the DC controller PCB controls the SSRs and relays o...

Page 132: ...witch DS1 Power switch SW1 Noise filter Scanner motor 24V Main motor 24V Mirror motor 24V DC loads 24V HVT 24V Regulator 2 AC drive circuit K101 Relay F101 Fuse 5V SMPS 24V AE sensor 24V Photointerrupters 5V ADF power supply option Sorter power supply option Lamp driver unit fixing heater AC load AC OFF DC controller PCB AC driver DC power supply PCB ...

Page 133: ...he parts by reversing the steps given to disas semble them 3 Identify each screw by type length diam eter and location 4 A washer is used for one of the mounting screws on the rear cover to protect against static electricity be sure to use the washer when assembling the part 5 A washer is used for some mounting screws for grounding wire varistor to ensure correct electrical continuity be sure to u...

Page 134: ...PCB How ever the VR300 does not exist on the DC controller PCB 1 Right cover 2 Rear cover 3 Right door Figure 7 202 A External Covers Detach the covers as necessary when cleaning checking or repairing the inside of the machine Covers that can be detached by mere removal of the fixing screws are omitted from the discussions 1 Detaching the Inside Cover 1 Remove the two screws that hold the front co...

Page 135: ...D IN JAPAN IMPRIME AU JAPON 7 5 1 2 3 4 5 6 7 8 9 10 1 Copyboard glass 2 Power indicator 3 Power switch 4 Developing assembly release lever 5 Developing assembly 6 Stack eliminating charger 7 Primary charger wire cleaner 8 Feeder assembly release lever 9 Copy density knob 10 Inner cover Figure 7 203 ...

Page 136: ...NON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 7 6 1 Screws Figure 7 204 1 Right door Figure 7 205 2 Detaching the Right Door 1 Open the right door 2 Remove the two screws 3 Detach the right door as if to lift it out of the cut offs 1 1 ...

Page 137: ... Panel 1 Detaching the Control Panel 1 Detach the inside cover and the left cover 2 Disconnect the fasteners 3 Disconnect four connectors from DC con troller PCB 4 Remove the five screws and lift the con trol panel toward the front to detach 1 1 1 1 1 2 1 Fasteners Figure 7 206 1 Connectors Figure 7 207 1 Screws 2 Control panel Figure 7 208 ...

Page 138: ...HT 1999 CANON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 7 8 1 Control panel Figure 7 209 5 Lift the control panel to the front and turn it over Note Do not force the control panel or the harness connected to it may snap off 1 ...

Page 139: ...contact D Fans 1 Outline The copier is equipped with two fans to circulate the air inside the machine thereby preventing the machine from overheating Each fan serves the following function Scanner cooling fan FM1 cools the scanner Exhaust fan FM2 discharges air to the outside 2 Scanner Cooling Fan FM1 1 Detach the rear cover and the upper rear cover 2 Disconnect the connector J308 from the DC cont...

Page 140: ...e drum unit 2 Detach the rear cover 3 Disconnect the connector J310 from the DC controller PCB and remove the two screws 4 Detach the ozone filter and the inside cover then lower the feeder assembly 5 Hold the exhaust fan assembly on its bot tom and remove the two screws then pull the assembly to the front 1 2 2 2 1 1 Connector 2 Screw Figure 7 212 1 Screws 2 Exhaust fan Figure 7 213 ...

Page 141: ... connectors on the DC con troller PCB 3 Remove the two screws then remove the DC controller PCB together with its mount 2 Power Supply Unit 1 Remove the rear cover 2 Disconnect all connectors on the power supply unit 3 Remove the two screws then remove the power supply unit 2 1 1 2 3 2 3 1 1 1 Connectors 2 Screw 3 DC controller PCB Figure 7 214 1 Connectors 2 Screws 3 Power supply unit Figure 7 21...

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Page 143: ...ION 8 1 II UNPACKING AND INSTALLING THE COPIER 8 2 A Unpacking 8 2 B Mounting the Drum 8 4 C Checking the Operation 8 5 D Adding Toner 8 6 CHAPTER 8 INSTALLATION E Checking the Image 8 7 F Universal Cassette Code Setting 123 8 8 III RELOCATING THE COPIER 8 9 IV INSTALLING THE CONTROL CARD V 8 10 ...

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Page 145: ...etween 15 and 35 C and the humidity 10 to 80 Avoid locations near water faucets humidifiers water boilers and refrigerators b Avoid locations near open fire or subject to dust or ammonia fumes and direct rays of the sun Provide curtains over the windows if necessary c Choose a well ventilated place d Make sure all feet of the copier will be in contact with the pedestal e Allow at least 10 cm from ...

Page 146: ...ing carton Place your hands beneath the front and rear of the base plate of the copier on skids then raise the copier and place it on a pedes tal or a desk Open the cardboard box and take out the parts and accessories Remove all tape and open the cassette Remove the cushion blocks from inside the cassette Remove the tapes that secure the optical unit in place outside the left cover and slide the f...

Page 147: ...d disengage the developing assembly and remove it from the copier Remove the cushion blocks from the feeder assembly and fixing assembly Disengage the feeder assembly remove the knob and remove the dummy drum Keep the knob for later use Step 7 8 9 Remarks Check that the developing cylinder is free of scratches Knob Dummy drum Cushion Cushion ...

Page 148: ...ines on the copy images As such be quick in performing the following work Work Take out the drum unit from the box and remove the light blocking sheet Set the drum unit in the copier and fix it in place using the knob that held the dummy drum Move the grip to clean the corona wire of the drum unit two to three times Set the developing assembly in the copier and engage it Step 1 2 3 4 Remarks Take ...

Page 149: ...n A3 2 making 9 continuous copies on A4 3 making 5 single copies on A3 4 making 5 single copies on A4 Check that the counter operates properly Step 1 2 3 4 5 6 7 8 9 Remarks Check that the ADD PAPER and CAS SETTE OUT indicators go ON and the WAIT indicator lights red See p 8 8 Check that the ADD PAPER indicator goes OFF Press the keys except the COPY START key on the control panel and check that e...

Page 150: ...comes into contact with the boss found on the left side of the front Hold the toner cartridge and pull on the seal to the front until it stops Tap lightly on the top of the toner cartridge until all toner has fallen into the developing assembly Remove the toner cartridge and keep it in an empty box Close the developing assembly lid and slide the assembly inside until it stops Turn the developing a...

Page 151: ...heet from drum unit or fresh copy paper and place it in a dark place whenever it is removed from the copier Do not touch the drum if its surface is soiled wipe off the dirt using a flannel cloth coated with toner Do not use paper lint free or otherwise or never use a dry cloth or solvent Work Place the Test Sheet on the copyboard and check the image Feed paper in the manual mode Clean up the area ...

Page 152: ...o universal cassette code 2 Active service program by pressing Sorter key 3 The 0to6 or ZOOM keys set the paper size to universal cassette code 4 The universal paper size code is indicated on the control panel display 0 to 6 Note The settings in the above table are enabled when the knob selector in the cassette is in U position Display Size Remarks 0 B4 Default setting 1 B5 2 B5R 3 LETTER 4 LETTER...

Page 153: ...er means of transportation Table 8 501 Work Remove the drum unit Fix the scanner and mirror carriage in place Tape the corona assembly release lever in place against vibration Tape the front door and delivery assembly Place a sheet of A3 paper on the copyboard glass and tape the copyboard cover Remarks Put the drum unit in a separate box for transport Fix the No 4 5 mirror in place Step 1 2 3 4 5 ...

Page 154: ...R 1999 PRINTED IN JAPAN IMPRIME AU JAPON 8 10 IV INSTALLING THE CONTROL CARD V 1 Detach the control panel 2 Remove the slot cover 1 and the screw 2 3 Set the control card main unit 1 and fix it to the control panel with four screws 2 2 1 1 2 2 2 Figure 8 601 Figure 8 602 ...

Page 155: ...1999 PRINTED IN JAPAN IMPRIME AU JAPON 8 11 1 1 1 2 3 4 Disconnect the shorting connector 1 5 Connect the relay cable 1 to the control card connector 2 and the control panel PCB connector 3 6 Route the cable 1 as shown in Figure 8 605 Figure 8 603 Figure 8 604 Figure 8 605 ...

Page 156: ... CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 8 12 1 2 1 7 Fix the grounding wire 1 to the support plate 2 8 Attach the control panel sheet 1 to the control panel 9 Attach the control panel to the main body Figure 8 606 Figure 8 607 ...

Page 157: ...N NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON I PERIODICALLY REPLACED PARTS 9 1 II DURABLE PARTS 9 2 CHAPTER 9 MAINTENANCE AND SERVICING III BASIC PROCEDURE FOR PERIODIC SERVICING 9 3 IV PERIODIC SERVICING SCHEDULE 9 4 ...

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Page 159: ...e of the copier if not replaced on schedule Parts should be replaced during the regular service visit that is closest to the end of the service life of the part as of March 1999 Table 9 101 Note The above values are estimates and are subject to change depending on future data Repacement 60 000 60 000 60 000 60 000 300 000 No 1 2 3 4 5 Description Ozone filter Optical fan filter Static charge elimi...

Page 160: ...laced at the same time Service life number of copies 30 000 100 000 100 000 100 000 100 000 200 000 200 000 200 000 200 000 200 000 90 000 90 000 100 000 100 000 Quantity 1 1 1 2 2 1 1 1 5 5 1 1 1 1 Part No FA5 1952 000 FC2 9799 00P FH7 3114 000 FC2 9750 00P FS1 1240 000 FG2 3009 00P FC2 8962 00P FC2 9774 00P FB1 0301 000 FA2 9037 000 FB1 8581 000 FF3 3698 00P FF3 2855 00P FB3 4494 00P Description...

Page 161: ...nsity b Dirty background c Clarity of letters d Leading edge blank area e Left and right margins f Fixing synchronizing and soiling of back g Unusual noise h Operation of counter Procedure Note the operator s comments Record the counter reading Make DIRECT and two page overlay test copies Clean the corona assemblies Clean separation feeder assem blies Clean fixing and delivery assemblies Paper gui...

Page 162: ...ting oil TKN 0451 Damp cloth Clean with a blower brush If very dirty clean with alcohol Clean mirror 6 with the mirror cleaning tool Dry wipe using lint free paper then clean using alcohol Damp cloth Clean with alcohol Clean with cleaning oil Clean with MEK Every 30 000 copies Every 15 000 copies Description Copyboard glass Ozone filter Scanner rails Transfer guide Feeder belt Feeder frame Scannin...

Page 163: ...C Troubleshooting of Image Faults 10 25 IV OPERATION TROUBLESHOOTING 10 37 A Troubleshooting of Malfunction 10 37 CHAPTER 10 TROUBLESHOOTING V TROUBLESHOOTING FEEDING PROBLEMS 10 56 A Paper Jams 10 56 VI INCORRECT PAPER FEED OPERATION 10 60 VII FUNCTION AND ARRANGEMENT OF THE ELECTRICAL PARTS 10 62 A Sensors Fuses and Lamps 10 62 B Clutches Solenoids Fans Motors and Heaters 10 63 C Switches Circui...

Page 164: ...en J109 1 and J109 2 on the DC controller PCB asks you to connect the meter s positive probe to J109 1 and negative probe to J109 2 Cause Fault Power plug Covers Main power Remedies Connect the plug Close the door and cover The problem is not the copier s advise the user Go to step 6 YES NO NO NO NO YES Checks Is the power plug connected to the outlet Are the front door and delivery cover closed p...

Page 165: ...e bet ween the primary corona grid and the photo sensitive drum correct NO YES YES Note 1 YES Turn the copy density knob clockwise Note 2 The image will become lighter Turn the copy density knob counterclockwise Note 3 The image will become darker Is the density of gray scale No 10 too dark See Note 3 YES Is the density of gray scale No 10 correct See Note 3 NO NO See Note 4 YES End Image adjustme...

Page 166: ...rks Cleaning MEK Cleaning Cleaning Fixing assembly and Paper pick up assembly Feeder belt Feeder assembly Location Transter guide Tool Cleaner Damp cloth Action Remarks Cleaning Separation and transfer assemblies Primary corona grid Location Developing rollers Primary corona assembly Transfer corona assembly Static charge ellminator Tool Cleaner Alcohol Alcohol and lint free paper Blower brush Blo...

Page 167: ...hown in the figure below If bias is being applied to the grid of the primary corona while the scanner is passing over the white strip the leading edge of the copy will be reproduced blank If the leading edge non image width is outside the standards adjust the timing at which the grid bias goes from OFF to ON in the service mode C3 Figure 10 201 The standard leading edge non reproduced area on a DI...

Page 168: ... 5 mm when the test sheet is copied in DIRECT Note Adjust the leading edge non reproduced area before making this adjustment Figure 10 203 A higher setting in the service mode C2 increases the leading edge margin 3 Side to Side Registration a Cassette Feeding The standard near side registration on a DIRECT copy of the test sheet is 10 0 2 mm Figure 10 204 Loosen the two screws and adjust the latch...

Page 169: ... JAPAN IMPRIME AU JAPON 10 5 10 2 mm 0 2 4 6 8 10 Screw Side guide b Multifeeder Feeding The standard near side registration on a DIERCT copy of the test sheet is 10 0 2 mm Figure 10 206 Loosen the screw and adjust the multifeeder side guide by sliding it Then tighten the screw Figure 10 207 ...

Page 170: ...ver 2 Mark the positions of the pulley fixing base and the wire fixing piece with a scriber 3 Remove the two screws keeping the pulley fixing base 4 Remove the cable b Attaching the Lens Cable 1 Remove the two screws keeping the lens pulley fixing plate and remove the lens pulley 2 Wind the lens cable around the lens pulley as shown in Figure 10 206 and secure it with the two fixing screws 3 Shift...

Page 171: ...ON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 10 7 5 Installing the Scanner Drive Cable Figure 10 209 Lower groove Scanner pulley 1 4 2 6 Top groove 6 3 Pulley 2 Screw A Screws B Mark the position Pulley 3 5 Pulley 1 4 turns ...

Page 172: ...osition As shown in Figure 10 210 pull at point A approximate center of the free cable with a spring gauge so that the cable lengths touch each other If the reading on the spring balance is not about 1 0 0 5 kg loosen the screws B of Figure 10 213 turn screw A to achieve this reading and then tighten the screws B Figure 10 210 Top View Pulley 2 Pulley 2 Mirror 2 3 mount Scanner A 1 0 0 5 kg Scanne...

Page 173: ...ill cause an incorrect side to side repro duction ratio and poor focus resulting in poor sharpness and fuzziness in the copy image 1 Draw lines 10 mm from each edge of a piece of copy paper A3 as shown in Figure 10 211 Figure 10 211 2 Make a copy of the paper with the lines marked on it A 3 Place a blank sheet of paper on the copyboard and feed the marked sheet of paper into the copier Use manual ...

Page 174: ... 1999 PRINTED IN JAPAN IMPRIME AU JAPON 10 10 For reference If the distance between the mirrors is short the image will be enlarged If the distance is long the image will be reduced Figure 10 213 Top View X Y Z a b No 1 mirror mount Fixing screws front rear Mirror drive cable ...

Page 175: ...e main switch to OFF ON 6 Make a direct copy 7 Check the copy ratio If the copy ratio is appropriate go to d Adjusting the Lens and Mirror Position 50 If the copy ratio is not appropriate repeat step 4 and later d Adjusting the Lens and Mirror Position 50 1 Make a 50 copy 2 Check the copy ratio If the copy ratio is not appropriate perform the following steps 3 Enter service mode C7 copy ratio adju...

Page 176: ...ith a force of 500g the distance between the two runs of the belt is between 20 and 25 mm Figure 10 214 9 Installation Position of the Transfer Guide When installing the transfer guide ensure that the clearance between the transfer assembly roller and the photosensitive drum is about 1 8 0 2 mm as shown in Figure 10 215 Figure 10 215 Tension decreases Tension Increases Main motor mounting holes Sp...

Page 177: ...late direction of arrow 1 move it in the direction of the manual feed tray direction of arrow 2 so that it touches the pulley base and the lens gear In this condition tighten the screws and confirm that there is play between the lens gear and the gear of the lens drive capstan Figure 10 216 11 Installing the Corona Wires in the Primary and Transfer Corona Assemblies Figure 10 217 The corona wire m...

Page 178: ...te The height position of the corona wire of the primary and transfer corona assemblies can be adjusted by turning the screw at the back of the corona wire Turning the screw once causes the height of the corona wire to change by about 0 7 mm Corona assembly Primary corona assembly Transfer corona assembly Allowable range 2 mm 2 mm Standard position Approx 10 5 mm Approx 10 mm ...

Page 179: ...dth Measuring Procedure 1 Open the copyboard cover and make an A3 size solid black copy 2 Set the solid black copy to the multifeeder 3 Select the service mode C13 3 1 Detach the VR cover from the rear of the left cover 3 2 Press the service switch SW300 on the DC controller PCB 3 3 Select the service mode C13 using the 10 key or the zoom key 4 Press the COPY START key The solid black paper is aut...

Page 180: ... registration roller 1 Set 50 sheets of A4 paper 80 g m2 on the multifeeder tray 2 Press the PAPER SELECT key on the control panel to select the multifeeder 3 Press the COPY START key 4 Check that the leading edge of the copy paper butts against registration roller and arches at the time turn the copier OFF 5 Measure the distance between A trailing edge of the second sheet and B trailing edge of t...

Page 181: ...recision Do not attempt to adjust such parts Notes 1 Leakage current may flow through some LEDs and cause them to glow dimly even though they are supposed to be OFF 2 VRs which can be adjusted in the field VRs which should not be adjusted in the field a DC Controller PCB Figure 10 221 Table 10 202 Table 10 203 SW No SW300 Purpose Press to enter or leave the SERVICE mode VR No VR301 Purpose Adjusti...

Page 182: ...rol panel If 0 does not appear press the 0 number key on the control panel so that 0 appears 5 Press the SORT GROUP key on the control panel The scanner will move forward to the AE measuring position then the scanning lamp will go ON Note 6 Adjust VR301 on the DC controller so that 19 appears on the COPY COUNT RATIO indi cator Figure 10 222 7 Press the SORT GROUP key The scanning lamp will go OFF ...

Page 183: ...eys increasing the value makes the copy density lighter standard value is 110 to 120 variation of ten steps is equivalent to approximately one step of F of the exposure lever on the control panel 5 Make a 50 copy if the copy density is not yet satisfactory repeat steps 3 to 4 b Adjusting the Lamp Brightness 200 1 Make a 200 copy 2 Check the exposure if the density is not satisfactory perform the f...

Page 184: ...ette with the copier in STANDBY move the arm up and down manu ally Arm raised voltage approx 0 6V Arm lowered voltage approx 0V Q2 Pre registration paper sensor PDP1 J304 8 J304 7 With the copier in STANDBY raise and lower the arm manually Arm raised voltage approx 5V Arm lowered voltage approx 0V Q5 Scanner home position sensor SCHP J312 5 J312 4 With the copier in STANDBY move the scanner by han...

Page 185: ...normally be set to 4 5 1 5 b Check if the original has a background color such as yellow which causes poor contrast c Check the density of the original Examples Originals which are diazo copies or transparent originals Copies are likely to be mistak enly judged as being foggy Pencil originals Copies are likely to be mistakenly judged as having a light image 3 Checking the Copyboard Cover or the Co...

Page 186: ... from the coronas may occur d Paper may jam or fail to be fed satisfactorily due to condensation on the pick up and delivery guide plate e The friction of the lower manual feed paper pick up roller may be reduced resulting in unsat isfactory paper pick up If condensation occurs in the copier switch the copier ON and leave it to stand for 10 to 20 minutes If a cartridge in its original sealed wrapp...

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Page 188: ...N NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 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 189: ...orm AE adjustment Check that J39 1 and J39 4 of the black devel oping assembly are con nected by a jumper wire If they are not connect them End Replace the drum unit Result Yes Yes Yes Yes No Check Does the image quality improve after the basic adjustment procedure is followed Is the image lighter is when a copy is made using AE Is the image lighter when a copy is made using a black developing ass...

Page 190: ...icator does not go ON 2 If the problem is in the CT unit replace the CT unit Check if the developing bias is being supplied to the developing cylinder Result Yes No No Yes Yes No No No Yes Check Does the image quality improve after the basic adjustment procedure is followed Switch the copier OFF during copying and open the front door Does the toner image on the surface of the photosensitive drum p...

Page 191: ... sembly wipe the sur face of the developing cylinder with a dry cloth 3 If the problem is in the CT unit try putting the CT unit in the storage box and shaking it vig orously If the image does not improve re place the CT unit 1 Clean all the corona wires once more then recheck the position of each corona wire 2 Try changing the copy paper Result Yes No Yes No No Yes Check Does the image quality im...

Page 192: ...ing lamp reflectors mirrors lens and dust proofing glass are cleaned Does the pre exposure lamp go ON during copying Set the meter to the 30VDC range and measure the voltage between J307 6 and J307 7 of the DC controller PCB Is the voltage 10V or less during copying and approx 16V at other times Is the voltage between J307 5 and J307 7 of the DC controller PCB approx 0 6V during copying and approx...

Page 193: ...2 Check and clean the separation claws and fixing blade Check for dirt at the inlet of the fixing assembly Result No Yes No Yes No Check Press the COPY START key and switch the copier OFF to stop the paper on the feeder Are there black lines on the copy image before the paper passes through the fixing assembly Are there any scratches or black lines around the circumference of the photosen sitive d...

Page 194: ...ut the correct method of storing paper Replace the drum unit Find out the causes of the scratches on the drum Check if outside light is striking the photosensitive drum End Clean the static charge eliminator Result No Yes No Yes Yes No Yes No Check Press the COPY START key with the copyboard cover open then switch the copier OFF to stop the copy paper on the feeder Are there any white strips or na...

Page 195: ...t the use about the correct method of storing paper 1 Check the scanner rail for foreign matter ad hering to it 2 Adjust the tension of the scanner drive cable Clean each corona as sembly wires and frame Result Yes Yes Yes Yes No Check Do the white strips occur at intervals of approx 63mm scratches on developing cylinder Do the white strips occur at intervals of approx 94mm scratches on the photo ...

Page 196: ...e back of the copy paper Do the toner marks occur at intervals of approx 50mm Are the upper and lower fixing rollers dirty Procedure 1 2 3 Cause Problem area Developing assembly Fixing assem bly 14 Faulty fixing Action Check for scratches on the upper and lower fix ing rollers Refer to the sub section Fixing roller heater does not operate Adjust the lower fixing roller pressure Check if the recom ...

Page 197: ...the wiring from the DC controller PCB to the registration roller clutch If it is normal replace the registration roller clutch Replace the DC control ler PCB Result No No Yes Yes Yes No Check Is the original set correctly Is copy paper recommended by Canon be ing used Is the pick up roller soiled by paper dust etc Does the copy improve when registration is adjusted leading edge blank area Set the ...

Page 198: ...the gear of the scanner drive system missing Does the blurring occur at intervals of approx 95mm Does the blurring occur at intervals of approx 63mm Procedure 1 2 3 4 5 Cause Problem area Scanner drive cable Scanner system rail Scanner drive system Photosensitive drum Developing gear Drum drive system Action Check from step 4 Check the scanning lamp and lamp regulator Check the toner coating on th...

Page 199: ...izontal reproduction ratio within the standard for a DIRECT copy Procedure 1 2 3 4 Cause Problem area Original Copyboard glass Lens drive assembly Mirror position Dirt on the scanner 21 Blank image Action Insert the drum unit Insert the developing as sembly 1 Check if the photosen sitive drum rotates smoothly 2 Check the drum drive unit Replace the DC control ler PCB Replace the high voltage trans...

Page 200: ...99 CANON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 10 36 22 Black image Action Check according to Scanning lamp does not go ON Result No Check Does the scanning lamp go ON during copying Procedure 1 Cause Problem area ...

Page 201: ...r power is switched ON Check visually Does the problem disappear when the ther mistors TH1 2 are replaced Procedure 1 2 Cause Problem area Thermistors Action Refer to the sub section Fixing roller heater does not operate End Replace the DC power supply PCB or DC con troller PCB Result No Yes No Check Cancel the E001 indication Does the fix ing roller heater H1 go ON immediately after power is swit...

Page 202: ...very slightly after the lens moves Is the scanner home position sensor Q5 normal Procedure 1 2 3 Cause Problem area Scanner home position sensor Q5 DC controller PCB 5 E208 indication Action Replace Q4 Replace the DC control ler PCB Replace the mirror mo tor Result No Yes No Check Check Q4 Is Q4 normal Press the zoom key within 50 200 Does the mirror carriage move Procedure 1 2 Cause Problem area ...

Page 203: ... lamp regula tor Result Yes Yes No Check Check the scanning lamp LA1 does not light when copying Check if the scanning lamp LA1 lights when copier is in standby Procedure 1 2 Cause Problem area Scanning lamp LA1 Lamp regulator DC controller PCB Action End Replace the DC control ler PCB Result Yes No Check Does the problem disappear when the power unit is replaced Procedure 1 Cause Problem area Pow...

Page 204: ...Yes No Check Does the problem disappear when the power is switched OFF and then ON again Does the problem disappear when circuit beaker CB2 on the ADF controller PCB is pressed Set the meter to the 12VDC range then connect the lead to J10 3 and the lead to J10 2 of the ADF controller PCB Is the voltage approx 5V Set the meter to the 30VDC range then connect the lead to J9 1 and the lead to J9 2 of...

Page 205: ...hen the power is switched OFF and then ON again Does the problem disappear when circuit breaker CB1 on the sorter controller PCB is reset Set the meter to the 30VDC range then connect the lead to J2 1 and the lead to J2 3 of the sorter PCB Is the volt age approx 24V Is the fuse on the sorter power supply PCB normal Set the meter to an AC range high enough for measuring line voltage Connect the lea...

Page 206: ...place the DC control ler PCB Result No No No No Yes Check Try operating the main switch by hand Does it operate normally Check the wiring from the DC controller PCB J316 1 and 2 to the control panel Is it normal Is there electrical continuity from J503 1 to J509 2 on the control panel PCB Is the wiring from J509 of the control panel PCB to the main switch normal Procedure 1 2 3 4 Cause Problem are...

Page 207: ... No No No Yes Check Is the power cord plugged into the outlet Are the front door and the delivery assem bly closed completely Is line voltage being supplied to the power outlet Is line voltage present between J1 1 and J1 2 Check the voltage between J101 and J102 Is the voltage standard Check the continuity between the termi nals of the door switch DS1 Is the resis tance 0Ω when the actuator is pre...

Page 208: ...of the fuse blowing then re place the power supply assembly Replace the power sup ply assembly Replace the DC control ler PCB Result Yes No No Yes No Yes Check Does the problem disappear when the copier is switched OFF and the ON again Is AC line voltage present between termi nals J103 1 and J103 2 Are the following connector pins con nected properly J100 4 and J100 5 J100 1 and J100 2 Has a fuse ...

Page 209: ...he solenoid If it is normal check the spring clutch and control ring Replace any necessary parts Check the wiring from the pick up clutch sole noid SL1 to the DC controller PCB If it is normal replace SL1 Replace the DC control ler PCB Result Yes No Yes Yes Yes No Yes Check Does the indicator remain ON Is the drive belt installed correctly Is the leading edge of the copy paper reaching the registr...

Page 210: ...07 4 Press the COPY START key Does the voltage change from 0V to about 24V Procedure 1 2 3 Cause Problem area Belts and gears Registration roller clutch CL1 DC controller PCB Action Replace the sensor arm Replace pre registration paper sensor Q2 Check the wiring from J312 to SL3 If it is nor mal replace the multifeeder clutch SL3 Refer to the sub section Registration rollers do not turn Re install...

Page 211: ...ck Is the scanner drive cable installed cor rectly Switch the copier OFF hold the back of the scanner and move it back and forth Does it move smoothly Is the scanner drive capstan engaged with the interruption gear See Figure 10 401 Switch the power OFF and disconnect connector J302 on the DC controller PCB Set the meter to the 100Ω range and mea sure the registance between the connectors shown be...

Page 212: ...CHAPTER 10 TROUBLESHOOTING COPYRIGHT 1999 CANON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 10 48 Figure10 401 Scanner drive capsten Connecting gear SL2 Engaged ...

Page 213: ...n after replacing the fuse Replace the lamp Replace the DC control ler PCB End Check the AC wiring from the power switch to the lamp regulator and lamp and check the DC wiring from the DC con troller to the lamp ragulator Result No No No No Yes No Check Is the lamp installed correctly Check the continuity of the thermal fuse FU2 Connect the leads to both ends of the fuse Is there continuity Discon...

Page 214: ...eater Check the AC wiring in side the fixing assembly Replace the DC control ler PCB Replace the AC driver DC power supply PCB Result Yes No No Yes No Yes Check Disconnect connector J106 3P from the AC driver DC power supply PCB Set the meter to the 1kΩ range Connect the leads to J106 1 and J106 3 Does the needle move Remove the fixing assembly Connect the leads to both ends of thermoswitch F1 Doe...

Page 215: ...es not move See step 6 of Scanner does not move Procedure 1 2 3 4 Cause Problem area Lens solenoid SL2 Lens drive cable pulley Rails Scanner motor M2 Power supply assembly DC controller PCB Action Check the wiring betweeen the DC con troller PCB and the counter If it is normal replace the counter Replace the counter Replace the DC control ler PCB Result No Yes No Check Switch the power OFF Disconn...

Page 216: ... Cassette Multifeeder paper sensor Q1 Cassette paper sensor Q7 DC controller PCB Action Check the wiring from the DC controller PCB to the cassette size sensor PCB If it is normal re place the cassette size sensor PCB Check the wiring from the DC controller PCB to Q1 or Q7 If it is normal replace Q1 or Q7 End Replace the DC control ler PCB Result Yes No Yes No Check Does the indicator remain OFF w...

Page 217: ...e voltage approx 0V Does the problem disappear when the con trol panel is replaced Procedure 1 2 3 Cause Problem area Connector connection Black toner level sensor TS1 Control panel DC controller PCB Action Continue from step 3 Replace the jam sensor Replace the DC control ler PCB End Replace the DC contorller PCB Result Yes No Yes Yes No Check Does the copying operation stop when a jam occurs Are...

Page 218: ...ng assembly operate normally Procedure 1 2 3 Cause Problem area DC controller PCB DC controller PCB Stirring rod gear Black toner level sensor Action Disconnect the shorting connector and connect the connector of the con trol card unit Check the wiring be tween the control card V unit and the DC control ler PCB End Replace the DC control ler PCB End There may be a prob lem with the relay on the ca...

Page 219: ...rol ler PCB Result No No No Yes No No Yes No No Yes Check Is anything displayed on the control card display Is a department card being used Take the card out completely then insert it once again Does EE appear on the control card display Is there dirt on the card PCB or is it bro ken etc Does the display in step 4 flash Borrow the upper limit setting card from the user and check the departmental u...

Page 220: ...V TROUBLESHOOTING FEEDING PROBLEMS A Paper Jams The main areas in this copier where jams could occur are as follows 1 Paper pick up area 2 Separation and feeder area 3 Fixing and delivery assembly area 4 Drum cleaner area Troubleshooting of paper jamming is described here for each of the above areas Figure 10 501 2 3 1 4 ...

Page 221: ...registra tion paper sensor Q2 1 Check each feed roller for wear and deforma tion 2 Check the paper guide plate for burrs or de formation Result No Yes Yes No Yes No Yes Check Is the cassette pushed fully into the copier Does the problem disappear when a differ ent casssette is used Is the copy paper curled or creased Does the pick up roller rotate during the copying cycle Are the pick up roller sh...

Page 222: ...ly Check the feeder belt roller and pulleys Replace the DC control ler PCB Result Yes No Yes No Yes No No Yes Check Does the leading edge of the copy paper pass through the registration rollers Does the registration roller clutch CL1 operate correctly Are the registration rollers worn deformed or dirty Are the reataining spring at the ends of the registration rollers installed correctly Is the pap...

Page 223: ... upper or lower fixing roller de formed or scratched Is toner etc adhering to the paper guide Is the height of the paper guide plate correct Is the roller pressure nip width within the standard Does the delivery sensor arm move smoothly Is the delivery paper sensor correctly See p 2 10 Procedure 1 2 3 4 5 6 7 8 Cause Problem area Delivery assem bly separation claws Fixing assembly Delivery assembl...

Page 224: ...panels of the cassette 3 Measure the strength of the paper lifting springs If it is weak replace them Suggest that the user use paper recommended by Canon Check if the hold down tabs are deformed Result No No No Yes Check Is the copy paper positioned correctly un der the hold down tabs Push the copy paper down in the cassette and release it Does it rise smoothly Is paper recommended by Canon being...

Page 225: ...the upper and lower fixing rollers both at the same time Result Yes Yes Yes No No Yes Check Switch the power OFF while the copy paper is passing along the feeder Are there any wrinkles in the copy paper at this point Is the paper skewed Does the trouble disappear when new copy paper is used Is any foreign matter such as toner ad hering to the paper guide Is the height of the paper guide cor rect I...

Page 226: ...or Right door sensor Mirror home position sensor Scanner home position sensor Lens home position sensor Cassette paper sensor Delivery paper sensor Upper fixing roller temperature sensor 1 main Upper fixing roller temperature sensor 2 auxiliary Scanning lamp over temperature protector Scanning lamp Pre exposure lamp Pre exposure lamp Code TS1 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 TH1 TH2 F2 LA2 LA731 LA738 Name...

Page 227: ...re 10 702 Symbol Function Registration roller clutch Pick up roller clutch solenoid Lens drive solenoid Multifeeder solenoid Blank solenoid Main motor Scanner motor Mirror motor Scanner cooling fan Exhaust fan Fixing roller heater Code CL1 SL1 SL2 SL3 SL4 M1 M2 M3 FM1 FM2 LA1 Name Clutch Solenoid Motor Fan unit Heater SL4 SL3 SL2 SL3 SL1 H1 CL1 FM2 M2 M3 M1 FM1 M SL CL ...

Page 228: ... IMPRIME AU JAPON 10 64 C Switches Circuit Breakers Counters Etc Figure 10 703 SW1 SW2 F1 DS1 CNT1 Symbol Function Power switch Cassette size sensor Front door switch Fixing assembly over temperature protec tor Total counter Code SW1 SW2 DS1 F1 CNT1 Name Switch Microswitch Thermoswitch Counter CNT ...

Page 229: ...cument density Contolling scanning lamp voltage Supplying high voltage for primary and transfer assemblies and developing bias Controlling the control panel Supplying power to the sorter Supplying power to the ADF Preventing noise Controlling copy density Indicating power Name DC controller PCB Power supply assembly AE sensor PCB Lamp regulator PCB High voltage transformer PCB Control panel PCB DC...

Page 230: ...e No of the desired service mode using the NUMERIC keypad on the control panel For example the display indicates C3 in response to a press on 3 6 Press the SORT GROUP key 7 Operate as follows as necessary Mode No C0 C12 C17 and C22 A press on the SORT GROUP key executes the selected mode a second press stops the execu tion Mode No C1 through C11 and C15 C21 C23 C24 C25 Change the setting using the...

Page 231: ...hut off setting Main switch shut off check Universal cassette code setting Lamp brightness 50 adjusting Lamp brightness 200 adjust ing Range 0 to 50 0 to 63 0 to 63 0 to 63 0 to 63 0 to 63 0 to 65 0 to 65 130 to 230 0 to 63 0 to 255 0 1 0 to 5 0 1 0 to 6 100 to 185 100 to 185 Default 25 32 32 32 32 32 180 32 95 1 0 1 0 124 145 Note 0 10 Volt step 0 25 mm step 0 25 mm step 0 25 mm step 0 25 mm step...

Page 232: ...T 1999 CANON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON 10 68 Table 10 802 Table 10 803 Size B4 B5 B5 R LETTER LETTER R LEGAL STMT R Code 0 1 2 3 4 5 6 Size No cassette A4 A3 A4 R A5 R Universal code 0 8 12 14 15 7 ...

Page 233: ... the temperature reached 50 C If fixing unit temperature drops below 50 C when the copier is in stand by or copying If the C HEAT CHECK signal is on while the HEAT ON signal is off If the main motor speed feedback sig nal does not appear after 2 sec from the main motor If the break signals is generated con tinuously for 0 1 sec or more when the counter is not being driven Code displayed Main cause...

Page 234: ... If the scanner is in the home posi tion SCHP 1 when the COPY START key is pressed If the scanner does not leave the home position SCHP remains 1 within 1 5 sec after it starts to ad vance If the scanner does not return to the home position SCHP remains 0 within 1 sec after it leaves the home position SCHP 0 If the No 4 and No 5 mirrors do not reach home position after 8 sec from driving starts If...

Page 235: ...n is made to prevent the user from resetting the copier when the fixing assem bly has a serious fault open thermistor or others that can damage the assembly Reset the copier as follows if E000 E001 E002 E003 or E004 is indicated 1 Detach the switch cover one screw 2 Shift the main switch SW1 to ON and continuously hold the main switch down so that the main power does not turn OFF 3 Press the servi...

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Page 237: ...T 1999 CANON INC CANON NP6317 REV 0 APR 1999 PRINTED IN JAPAN IMPRIME AU JAPON APPENDIX A GENERAL TIMING CHART A 1 B LIST OF SIGNALS ABBREVIATIONS A 3 C GENERAL CURCUIT DIAGRAM A 5 D SOLVENTS AND OILS LIST A 7 ...

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Page 239: ... Scanner motor M2 Scanner movement Lens solenoid SL2 Lens movement Lens home position sensor Q6 signal Blank solenoid SL4 Mirror motor M3 Mirror home position sensor Q4 Pick up clutch solenoid SL1 Multifeeder solenoid SL3 Pre registration paper sensor Q2 signal Registration roller clutch CL1 Delivery paper sensor Q8 signal Exhaust fan FM2 Total counter CNT1 1 Varies depending on the reproduction r...

Page 240: ...Main motor M1 Scanner cooling fan Pre exposure lamp Fixing roller heater LA1 Primary Transfer corona assembly Developing DC component Developing AC component Scanning lamp LA2 Scanner home position sensor Q5 signal Grid bias ON OFF Scanner motor M2 Registration roller clutch CL1 Pre registration paper sensor Q2 signal Delivery paper sensor Q8 signal Exhaust fan FM2 Total counter CNT1 Multifeeder s...

Page 241: ...SETTE SIZE 2 signal CSZ3 CASSETTE SIZE 3 signal CSZ4 CASSETTE SIZE 4 signal DLP DELIVERY PAPER detection signal FM1D FAN MOTOR drive command 1 FM2D FAN MOTOR drive command 2 HTRD HEATER DRIVE command LAMP CHECK LAMP ON CHECK detection signal LAMP SHIFT LAMP SHIFT command LHP LENS HOME POSITION detection signal LIGHT LIGHT ON command LNSD LENS SOLENOID drive command MFPD MULITIFEEDER PAPER detectio...

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Page 243: ...03 5 4 6 2 1 3 6 3 5 4 2 1 J309 1 2 J308 2 1 J310 1 3 2 5 J303 3 2 1 4 4 6 5 1 2 3 J302 7 4 6 5 1 2 3 J306 5 6 J305 3 4 2 1 J318 3 2 1 6 J300 1 2 4 5 3 10 J311 6 5 4 8 9 7 2 1 3 7 8 1 2 4 5 3 6 J307 1 2 4 5 3 J313 To main switch BROWN GREY J509 PW ON OFF 24V 2 1 volume PCB indicator PCB Copy density Power VR501 L531 J10 J9 J8 J7 J6 3 GND J506 VCC KVR 1 2 Control panel J505 2 1 VON GND TP1 Insead o...

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Page 245: ... SOLVENTS AND OILS LIST Remarks Do not bring near fire IPA isopropyl alcohol FY9 6008 10g No 1 2 Name Alcohol Lubricant Uses Cleaning e g glass plastic rubber external covers Driving parts friction parts lead cam Composition Fluorine family hydrogen carbon alcohol surface activating agent Silicone oil ...

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Page 247: ...U JAPON Prepared by Office Imaging Products Technical Support Department 3 Office Imaging Products Technical Support Division Office Imaging Products Quality Assurance Center CANON INC Printed in Japan REVISION 0 APR 1999 18756 5 1 Hakusan 7 chome Toride shi Ibaraki 302 8501 Japan ...

Page 248: ...0499AB0 91 1 PRINTED IN JAPAN IMPRIME AU JAPON This pubication is printed on 70 reprocessed paper ...

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