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CHAPTER 3 IMAGE TROUBLESHOOTING

3-7

C. Troubleshooting by Image Fault

1. The copy is too light (halftone areas only).
2. The copy is too light (dark areas as well).
3. The copy is too light (extremely light overall).

Cause

Step

Checks

YES/NO

Remedies

Lens, Reflecting plate,
Intensity sensor

Clean the lens, reflecting plate,
and intensity sensor.
Is the problem corrected?

YES

End.

Press the Copy Start key, and
switch the copier OFF in the
middle of operation; then, open
the top cover.
Is the toner image on the pho-
tosensitive drum more or less
normal before transfer?

Be sure to check quickly to
protect the drum against light.

Go to step 5.

Transfer charging
roller

Is the transfer charging roller
normal?

1. Re-attach the charging

roller.

2. Replace the charging

roller.

Copy paper

Try paper fresh out of package.
Is the copy density higher?

YES

1. The paper may be

moist; advise the user
on the correct method
of storage.

2. Advise the user that the

use of non-recom-
mended paper may not
bring about the best
results.

Transfer

Cartridge

Replace the cartridge.
Is the problem corrected?

YES

End.

DC controller/DC
power supply PCB

Replace the DC controller/
DC power supply PCB.

Содержание FC200

Страница 2: ... MAY VARY SLIGHTLY FROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING AND 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 INFORMATION NOT APPLICABLE TO CERTAIN AREAS COPYRIGHT 1998 CANON INC Printed in Japan Imprimé au Japon Pre...

Страница 3: ...ass for Dirt and Scratches 3 2 4 Checking the Lens Array for Dirt 3 2 5 Checking the Transfer Charging Roller 3 2 6 Checking the Feeding Assembly 3 2 7 Checking the Copy Paper 3 2 8 Checking the Durables 3 2 9 Others 3 4 B Samples of Image Faults 3 6 C Troubleshooting by Image Fault 3 7 1 The copy is too light halftone areas only 3 7 2 The copy is too light dark areas as well 3 7 3 The copy is too...

Страница 4: ...embly 5 2 3 Fixing Delivery Assembly 5 3 B Feeding Faults 5 4 1 Double Feeding 5 4 2 Wrinkles 5 4 CHAPTER 6 ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS A Sensors and Solenoids 6 1 B Switches 6 2 C Lamp Heater Motor and Others 6 3 D Printed Circuit Board PCB 6 4 E Variable Resistors VR and Check Pins by PCB 6 5 1 DC Controller DC Power Supply PCB 6 5 2 Control Panel PCB 6 6 14 The copy has faulty...

Страница 5: ...IN JAPAN IMPRIME AU JAPON iii CHAPTER 7 SELF DIAGNOSIS Self Diagnosis 7 1 APPENDIX A General Timing Chart A 1 B Signals Abbreviations List A 3 1 Signals A 3 2 Abbreviations A 4 C General Circuit Diagram A 5 D Special Tools Table A 7 E Solvents Oils Table A 8 F Specifications A 9 ...

Страница 7: ...ON A Periodically Replaced Parts The machine does not have parts which must be replaced on a periodical basis B Durables The machine does not have parts which are classified as durables C Periodical Servicing The machine does not have parts that require periodical servicing 1 ...

Страница 8: ...ure the place is controlled to the specifications shown in Table 1 1D a Avoid direct rays of the sun b Avoid areas subjected to appreciable vibration c Do not drop or subject it to impact Normal 9 10 of period 0 to 35 C 32 to 95 F 35 to 40 C 95 to 104 F 20 to 0 C 4 to 32 F High Low Severe 1 10 of period Temperature Temperature fluctuations within about 3 min 40 15 C 104 59 F 20 C 25 C 4 F 77 F Nor...

Страница 9: ...a protective box the inside may become extremely hot 2 Avoid areas of high or low temperature humidity and areas where these elements tend to change rapidly for example near air conditioners or heaters 3 Avoid areas where dust ammonium gas or gases from organic solvents tend to accumulate 4 Keep the cartridge in a place 40 C or less b Handling the Cartridge 1 Before inserting the cartridge in the ...

Страница 10: ...t the drum resulting in copies with white spots or vertical lines Leave the copier alone for some time for possible recovery to avoid residual memory which results in white spots or vertical lines however keep the following in mind Caution Work quickly when removing jams or replacing cartridges When the cartridge must be removed for work be sure to put the cartridge in its storage box or cover it ...

Страница 11: ...o the middle Clean the parts Is the problem corrected by the density correction switch Is optimum density obtained by adjusting the intensity of light See Is gray scale No 9 barely noted See Note 2 Check the following 1 Cartridge 2 Scanning lamp unit 3 DC controller DC power supply PCB see Troubleshooting by Image Fault End End NO YES YES NO YES NO YES Pre Checks Optimum Density Adjustment 1 If a ...

Страница 12: ...are not to touch the roller or leave oil Cartridge Transfer charging roller Parts Tools Solve Remarks Inlet guide Solvent Fixing assembly Parts Tools Solve Remarks Lens array Cotton wad Do not use the wire cleaner meant for conventional machines Optical assembly Scanning lamp Blower brush Parts Tools Solve Remarks Intensity AE sensor Blower brush Cleaning Electrical Parts Tools Solve Remarks Copyb...

Страница 13: ...st Sheet is copied Figure 2 1A The leading edge non image width is determined by the position of the white paint found behind the copyboard glass Figure 2 2A 2 Image Leading Edge Margin point of detection for registration The leading edge margin must be 0 2 to 5 0 mm when the Test Sheet is copied To adjust move the position of the registration cam 2 0 1 0 mm Copyboard glass 2mm Size index White pa...

Страница 14: ...ulty control panel PCB 2 Set the meter to the 200 k range and measure C between the terminal of VR604 and the terminal of R614 on the detached control panel PCB see Figure 2 1B 3 Likewise measure C between the terminal of VR604 and the terminal of R614 on the new control PCB then turn VR604 so that the reading is the same as the measurement taken in step 2 4 In the case of the PC420 430 FC220 adju...

Страница 15: ...enter 3 Set the density correction switch SW606 to the center PC420 430 FC220 4 Set the Test Sheet NA3 NB3 NA2 and make a copy 5 Check if the copy is free of fogging and gray scale No 9 No 10 if NB3 is somewhat visible If too dark Turn VR604 on the control panel PCB clockwise slightly to increase the intensity If too light Turn VR604 counterclockwise slightly to decrease the intensity 6 Repeat ste...

Страница 16: ...y 1 Switch the copier OFF 2 Detach the control panel cover 3 Turn VR602 and VR603 on the control panel PCB fully clockwise 4 Place a newspaper over the AE light receiving section of the copyboard and close the copyboard cover Figure 2 3B 5 Short the three jumper wires JP604 JP605 JP607 on the control panel PCB at the same time using a screwdriver Caution Take adequate care not to short wires other...

Страница 17: ...top shorting the jumper wires 8 Set the digital multimeter to the 20V DC range and turn VR602 AE offset adjustment until the voltage between the anode side of the diode D606 and JP607 GND is 4 0 0 1 V Notes You must use a Digital Multimeter when making adjustments in steps 8 and 10 JP607 JP605 JP604 Screwdriver Control panel PCB Figure 2 5B JP607 VR603 VR602 Control panel PCB D606 anode side ...

Страница 18: ...rted 12 Switch the copier ON once again 13 Set the density correction switch SW606 to the center of the three settings 14 Make sure that the AE indicator is ON 15 Set the newspaper used in step 4 on the copyboard once again this time move the newspaper to a different area 16 Make a copy and make sure that it is not foggy and has adequate text density If foggy Turn VR602 clockwise slightly If text ...

Страница 19: ...ovide curtains e Make sure the site is well ventilated f Make sure the floor is level Check the site to see if it meets the above requirements 2 Checking the Documents You must first check to see if a particular problem may not be due to the document used a The copy density reading should be 5 5 1 5 black 4 5 1 5 color b Some backgrounds i e yellow shades tend to produce copies with poor contrast ...

Страница 20: ... Roller Check the transfer charging roller for scratches or other abnormalities 6 Checking the Feeding Assembly Check the feeding assembly for dirt If dirt is found clean it with a moist cloth 7 Checking the Copy Paper a Check to see if paper of a type recommended by Canon is used b Check to make sure that the paper is not moist Try paper fresh out of package 8 Checking the Durables Checking the C...

Страница 21: ...te it several times Figure 3 2A 2 Set the cartridge back into the copier and make copies a If the copies are normal The user may use the cartridge for some time more however advise the user to procure a replacement cartridge b If the copies fail to return to normal Replace the cartridge as described in Replacing the Cartridge ...

Страница 22: ...sumes a high electrical resistance resulting in poor contrast c Condensation in the pick up feeding assembly can cause faulty paper transport d Condensation in the lower roller of the manual pick up mechanism decreases friction leading to pick up failure e Condensation on the copyboard hinders its smooth movement When condensation is noted dry wipe the parts The same holds true of the cartridge Af...

Страница 23: ...CHAPTER 3 IMAGE TROUBLESHOOTING 3 5 ...

Страница 24: ...3 6 CHAPTER 3 IMAGE TROUBLESHOOTING B Samples of Image Faults not available ...

Страница 25: ...er image on the pho tosensitive drum more or less normal before transfer Be sure to check quickly to protect the drum against light NO Go to step 5 Transfer charging roller 3 Is the transfer charging roller normal NO 1 Re attach the charging roller 2 Replace the charging roller Copy paper 4 Try paper fresh out of package Is the copy density higher YES 1 The paper may be moist advise the user on th...

Страница 26: ...toner image on the photosensitive drum before transfer have uneven density YES 1 Replace the cartridge 2 Replace the scanning lamp unit Transfer charging roller NO Check the transfer charg ing roller Cause Step Checks YES NO Remedies Scanner 1 Clean the scanning lamp reflecting plate and lens Is the problem corrected YES End Scanning lamp Developing bias 2 Is continuity present between photosensit...

Страница 27: ...put it back in Is the problem corrected YES End NO Replace the cartridge Cause Step Checks YES NO Remedies Fixing assembly 1 Press the Copy Start key and switch the copier OFF in the middle of operation then open the top cover Does the copy image have white spots or white lines before fixing NO Check the fixing assembly Cartridge 2 Rotate the cartridge several times Is the problem corrected YES Ad...

Страница 28: ...opyboard rail Check the scanning lamp for flickering and check the presence absence of a developing bias Scanning lamp Developing bias NO 13 The back of the copy is soiled Cause Step Checks YES NO Remedies Transfer charging assembly 1 Press the Copy Start key and switch the copier OFF while the copy paper is moving through the feeding assembly Is the back of the copy soiled NO Go to step 3 2 Is th...

Страница 29: ...pply PCB Fixing heater NO See The fixing heater fails to operate 15 The copy has faulty leading edge registration blank area much too wide 16 The copy has faulty leading edge registration blank area too wide 17 The copy has faulty leading edge registration no blank area Cause Step Checks YES NO Remedies Registration cam 1 Move the registration cam on the copyboard left and right Is there any chang...

Страница 30: ... 1 Does the scanning lamp flicker YES Replace the scanning lamp unit Cartridge 2 Replace the cartridge Is the problem corrected YES End High voltage transformer Check the high voltage transformer DC controller DC power supply PCB NO Cause Step Checks YES NO Remedies Document 1 Does the copy have an image which is too light at the same time YES Correct the light image first 2 Is there a gap between...

Страница 31: ... Drum drive assembly 5 Is the drum drive gear rotating normally NO Check the drum drive assembly High voltage transformer 6 Are the primary charging terminal at the front left of the cartridge and the high voltage terminal at the bottom of the copier in firm contact YES Check the high voltage transformer DC controller DC power supply PCB Terminals for primary charging Cartridge NO 1 Check the cont...

Страница 32: ...3 14 CHAPTER 3 IMAGE TROUBLESHOOTING ...

Страница 33: ... sufficiently cool Measure the voltage between J603 1 and J603 2 Is it about 3 2 V or more NO Check the wiring from the DC controller DC power supply PCB to the ther mistor TH1 if normal replace the fixing assem bly 2 Does the fixing heater operate normally NO See The fixing heater fails to operate DC controller DC power supply PCB 3 Switch the copier ON and make a copy Measure the voltage between...

Страница 34: ...n reverse after copying operation has started and move forward after it has reached the copy board start position YES Replace the DC con troller DC power supply PCB Copyboard drive assembly Copyboard glass assembly NO 1 Check the copyboard position sensor Q902 2 Try replacing the copy board drive assembly 3 Check the start position cam and reversal cam in the copyboard glass assembly Cause Step Ch...

Страница 35: ...reafter YES See E0 Top cover Delivery assembly cover 3 Are the top cover and delivery assembly cover closed properly NO Close the top cover and delivery assembly cover Power supply voltage 4 Is the rated voltage present at the power outlet NO Advise the user that the problem is not of the copier Door switch 5 Is the door switch SW1 SW2 normal Replace the door switch NO DC controller DC power suppl...

Страница 36: ...olenoid SL1 PC400 FC200 4 Set the meter to the 30VDC range Does the voltage between J201 6 and J201 7 on the DC controller DC power supply PCB change to about 24 V at pick up timing YES Check the spring clutch in the registration assembly and pick up assembly if normal replace the solenoid DC controller DC power supply PCB NO Check the wiring from the solenoid to the DC con troller DC power supply...

Страница 37: ... the DC controller DC power supply PCB Cause Step Checks YES NO Remedies Main motor M1 1 Is the main motor rotating NO See The main motor fails to rotate Copyboard Copyboard drive assembly 2 Push the copyboard by hand Does it move smoothly NO Check the copyboard and copyboard drive assembly DC controller DC power supply PCB 3 Set the meter to the 200Ω range Disconnect J902 from the copyboard drive...

Страница 38: ... to the DC controller DC power supply PCB if normal replace the DC controller DC power supply PCB Cause Step Checks YES NO Remedies Control panel PCB 1 Replace the control panel PCB Does the indicator go ON YES End DC controller DC power supply PCB NO Replace the DC controller DC power supply PCB Cause Step Checks YES NO Remedies Heater H1 Thermal fuse FU2 1 Is continuity present between terminals...

Страница 39: ...ING PAPER FEED PROBLEMS A Copy Paper Jams Jams can be classified according to location within the copier q Pick up assembly w Separation feeding assembly e Fixing delivery assembly The discussions that follow are organized with reference to these assemblies 3 2 1 Figure 5 1A ...

Страница 40: ... the pick up roller deformed or worn YES Replace the pick up roller Spring for pick up control Spring clutch PC420 430 FC220 NO 1 Check the spring 2 Check the spring clutch Cause Step Checks YES NO Remedies Copy paper 1 Try paper of a type recom mended by Canon Is the problem corrected YES Advise the user to use recommended paper 2 Is the copy paper curled or wavy or otherwise deformed YES Replace...

Страница 41: ...the separation feeding assembly Fixing assembly inlet guide 2 Is the inlet guide soiled with foreign matter or toner Clean it YES Delivery sensor lever 3 Does the delivery sensor lever move smoothly Correct it so that the lever moves smoothly NO Delivery roller assembly 4 Is the delivery sensor Q801 PCB normal Check the delivery roller assembly YES Delivery sensor PCB Replace the delivery sensor P...

Страница 42: ... 1 Switch the copier OFF while the copy paper is moving through the feeding assembly Is the paper wrinkled at the time Or is it moving askew YES Check the pick up assem bly Check the registration roller Copy paper 2 Try paper fresh out of package Is the problem corrected YES The paper may be moist advise the user on the correct method of storage Also advise the user to remove curling before feedin...

Страница 43: ...L2 Q901 Q801 Q131 PD601 PD602 SL1 6 Figure 6 1A Symbol Name Notation Description Photointerrupter Photodiode Solenoid Q131 Q801 Q901 Q902 PD601 PD602 SL1 SL2 Pick up assembly paper sensor Delivery assembly paper sensor Motor rotation sensor Copyboard position sensor Intensity sensor AE sensor Pick up registration solenoid Copyboard drive solenoid ...

Страница 44: ...AND FUNCTIONS OF ELECTRICAL PARTS B Switches Figure 6 1B SW2 SW604 SW606 SW1 Symbol Name Notation Description Switch Switch SW1 SW2 SW604 SW606 Top cover switch Delivery assembly door switch Power switch Density 3 setting switch ...

Страница 45: ... PARTS 6 3 C Lamp Heater Motor and Others M1 FU2 TH1 H1 Figure 6 1C Symbol Name Notation Description Heater Motor Thermistor Thermal fuse H1 M1 TH1 FU2 Fixing heater Main motor Fixing heater temperature detection Fixing heater overheating detection M ...

Страница 46: ...roller DC power supply PCB Control panel PCB Scanning lamp PCB Delivery sensor PCB Motor rotation sensor PCB Copyboard position sensor PCB Controls sequence supplies DC power controls scanning lamp ON Controls displays copying operation Scanning lamp LA1 LA8 Detects delivery Detects main motor rotation Detects copyboard position 2 1 3 4 5 6 ...

Страница 47: ...touch those VRs and check pins not discussed herein they are for factory use only and require special tools and high precision for adjustment Note 1 VRs that may be used in the field 2 VRs that must not be used in the field 1 DC Controller DC Power Supply PCB J201 1 12 VR102 J108 1 2 VR103 J5 T107 2 1 J6 J8 J7 VR101 J202 22 16 21 17 J101 J102 J103 J104 Note The pin No in parentheses refers to the ...

Страница 48: ...ust the AE offset use it only after replacing the scanning lamp unit intensity sensor AE sensor or control panel PCB VR603 Use it to adjust the AE gain use it only after replacing the scanning lamp unit intensity sensor AE sensor or control panel PCB VR604 Use it to adjust the light intensity use it only after replacing the scanning lamp unit intensity sensor AE sensor or control panel PCB Figure ...

Страница 49: ...s displayed PC420 430 FC220 or the Jam indicator PC400 FC200 remains ON for about 0 5 sec thereafter the power goes out 7 Code Cause Description Thermistor TH1 faulty Fixing heater H1 faulty DC controller DC power supply faulty The temperature of the fixing heater is 215 C or more The temperature of the fixing heater does not reach 80 C within 2 5 sec after copying operation has started The temper...

Страница 50: ...r DC power supply PCB faulty The copyboard position sensor Q902 goes ON when copying operation starts The copyboard position sensor Q902 is ON 0 8 sec after copying operation has started The copyboard position sensor Q902 does not go ON within 5 5 sec after copying operation has started The copyboard does not reach the start position within a specific period of time or it moves past the start posi...

Страница 51: ...anning lamp LA1 LA8 Fixing heater H1 Primary AC bias Primary DC bias Developing AC bias Developing DC bias Transfer Pick up sensor Q131 Registration solenoid SL1 Sequence Copyboard STBY INTR CBRV STOP CBFW CBRV COPY CBRV LSTR STOP STBY Power switch ON Copy paper inserted Copy paper inserted 240V 625V 400V 130 to 550V Cleaning mode Measurement mode 1 sec CBFW 13 Delivery sensor Q801 ...

Страница 52: ...120 to 560V Cleaning mode Measurement mode 1 sec CBFW 13 Main motor M1 Document position sensor Q902 Copyboard drive solenoid SL2 Scanning lamp LA1 LA8 Fixing heater H1 Primary AC bias Primary DC bias Developing AC bias Developing DC bias Transfer Pick up sensor Q131 Pick up solenoid SL1 Delivery sensor Q801 PC420 430 FC220 General Timing Chart A4 2 copies ...

Страница 53: ...ON SIGNAL 1 DGT2 OSCILLATION SIGNAL 2 HTRD FIXING HEATER DRIVE COMMAND HVPAC PRIMARY AC BIAS ON COMMAND HVPDC PRIMARY DC BIAS ON COMMAND HVPHO PRIMARY DC BIAS HIGH OUTPUT COMMAND HVTDC TRANSFER DC BIAS ON COMMAND KEYR0 RETURN SIGNAL 0 KEYR1 RETURN SIGNAL 1 LAPWM LAMP DRIVE COMMAND LID LAMP INTENSITY DETECTION SIGNAL MMCLK MAIN MOTOR CLOCK PULSE SIGNAL MMD MAIN MOTOR DRIVE COMMAND PWOFF POWER OFF C...

Страница 54: ...A 4 APPENDIX 2 Abbreviations INTR INITIAL ROTATION LSTR LAST ROTATION CBFW COPYBOARD FORWARD CBRV COPYBOARD REVERSE STBY STANDBY ...

Страница 55: ...tensity sensor Main motor Delivery sensor N C N C 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 J202 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 GND 5V DGT2 DGT0 GND SEG2 S_CHECK DGT1 PWSON VR KEYR0 TH1 LID S_CLK S_OUT S_IN 24V J601 HOT J1 RETURN 120 230V J8 Thermal fuse 2 FU2 Fixing heater H1 TH1 Fixing heater temperature sensor Control panel PCB Registration solenoid Copyboard drive solenoid Copyboard...

Страница 56: ...J801 1 2 3 1 2 3 4 J603P J621P AE sensor Intensity sensor J621F J603F Control panel PCB DC controller DC power supply PCB Scannig lamp PCB Door switch Delivery door switch 1 2 3 1 2 3 1 3 GND 5V DGT2 DGT0 GND SEG2 S_CHECK DGT1 PWSON VR KEYR0 TH1 LID S_CLK S_OUT S_IN 24V SEG0 AE SEG1 KEYR2 KEYR3 GND TH1 DGT1 LEG KEYRO 2 NC J102 J103 J907 Main motor J601 HOT J1 RETURN 120 230V 100V Thermal fuse 2 FU...

Страница 57: ...e standard tools set The tools are categorized as follows A tools that must be carried by each service person B tools that must be carried by a group of about five service persons C tools that must be kept by each workshop No Tool name Tool Number Shape Category Remarks 1 Digital multimeter CK 0552 B For adjusting the AE mechanism ...

Страница 58: ... locally Isopropyl alcohol may be substituted 2 Solvent Cleaning e g metal oil or toner dirt Hydrocarbon fluorine chlorine family Alcohol Do not bring near fire Procure locally 3 Heat resisting grease Lubricating drive assemblies Lithium soap mineral oil family Molybdenum bisulfate CK 0427 500 g can 4 Lubricating oil Mineral oil paraffin family CK 0451 100 cc 5 Lubricating oil Mineral oil paraffin...

Страница 59: ...able Copying speed Copy size A4 LTR LGL max postcard min 52 to 128 g m2 Tracing paper Colored paper OHP film Postcard vertical Labels Wrapping paper 63 g m2 Copy paper type Two sided copying Overlay copying Copy tray 9 copies approx A4 LTR 80 g m2 Non image width 2 mm leading edge A4 0 mm left right LTR LGL 2 mm left right Auto power off Available 5 min approx Performance PC430 only PC400 FC200 PC...

Страница 60: ...in reference only 0 2 kWh reference only Ozone 0 01 ppm or less average over 8 hr 71 dB Copying Standby Noise 14 1 in 359 mm Width Dimensions Depth Height 15 7 in 402 mm 4 1 in 108 mm Weight including cartridge 16 6 lb 7 4 kg approx Keep wrapped to protect against humidity Copy paper Cartridge See CHAPTER 1 Consumables Sound power level by ISO PC400 FC200 PC420 430 FC220 Serial numbers NVD FC220 W...

Страница 61: ...by OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPARTMENT 1 OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIVISION CANON INC Printed in Japan REVISION 0 JAN 1998 23715 5 1 Hakusan 7 chome Toride shi Ibaraki 302 Japan ...

Страница 62: ...PRINTED IN JAPAN IMPRIME AU JAPON 0198M2 01 1 This publication is printed on 70 reprocessed paper ...

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