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Canon LBP2900 series, Service Manual, Page: 20 / 118

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Canon LBP2900 series Service Manual Download Page 20

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Chapter 1  

1-4

T-1-2

[1] Photosensitive drum

[8] Developing cylinder

[2] Pressure roller

[9] Pickup roller

[3] Fixing film assembly

[10] Separation pad

[4] Delivery roller

[11]Feed roller

[5] Primary charging roller

[12] Transfer charging roller

[6] Toner cartridge
[7] Laser scanner assembly

Summary of Contents for LBP2900 series

Page 1: ...H T T P W W W F I X C L U B C O M C N Mar 10 2005 Service Manual LBP3000 2900 Series LBP2900...

Page 2: ...H T T P W W W F I X C L U B C O M C N...

Page 3: ...information as the need arises In the event of major changes in the contents of this manual over a long or short period Canon will issue a new edition of this manual The following paragraph does not a...

Page 4: ...dicates an item requiring care to avoid combustion fire Indicates an item prohibiting disassembly to avoid electric shocks or problems Indicates an item requiring disconnection of the power plug from...

Page 5: ...High while 0 is used to indicate Low The voltage value however differs from circuit to circuit In addition the asterisk as in DRMD indicates that the DRMD signal goes on when 0 In practically all cas...

Page 6: ...H T T P W W W F I X C L U B C O M C N...

Page 7: ...ontrolling the Laser Activation Timing 2 3 2 3 2 1 Turning On Off the Laser 2 3 2 3 2 2 Horizontal Synchronization Control 2 4 2 3 3 Laser Control 2 4 2 3 3 1 Auto Photo Current Control 2 4 2 3 4 Lase...

Page 8: ...emperature Control 2 22 2 8 2 2 Protective Functions 2 24 Chapter 3 DISASSEMBLY AND ASSEMBLY 3 1 EXTERNAL AND CONTROLS SYSTEM 3 1 3 1 1 Rear Cover 3 1 3 1 1 1 Removing the Right Cover 3 1 3 1 1 2 Remo...

Page 9: ...ickup Unit 3 17 3 4 1 1 Removing the Transfer Charging Roller 3 17 3 4 1 2 Removing the Right Cover 3 17 3 4 1 3 Removing the Left Cover 3 17 3 4 1 4 Removing the Front Cover 3 18 3 4 1 5 Removing the...

Page 10: ...he Right Cover 3 30 3 5 4 2 Removing the Left Cover 3 31 3 5 4 3 Removing the Front Cover 3 31 3 5 4 4 Removing the Upper Cover 3 32 3 5 4 5 Removing the Rear Cover 3 32 3 5 4 6 Removing the Delivery...

Page 11: ...C L U B C O M C N Contents 6 1 2 Motor 6 2 6 1 2 1 Motor 6 2 6 1 3 Sensor 6 3 6 1 3 1 Sensor 6 3 6 1 4 Switch 6 4 6 1 4 1 Switch 6 4 6 1 5 Lamps Heaters and Others 6 5 6 1 5 1 Heater 6 5 6 1 6 PCBs 6...

Page 12: ...H T T P W W W F I X C L U B C O M C N Contents...

Page 13: ...H T T P W W W F I X C L U B C O M C N Chapter 1 PRODUCT DESCRIPTION...

Page 14: ...H T T P W W W F I X C L U B C O M C N...

Page 15: ...ne Specifications 1 2 1 3 Name of Parts 1 3 1 3 1 External View 1 3 1 3 2 Cross Section View 1 3 1 4 Using the Machine 1 5 1 4 1 Control Panel 1 5 1 5 Safety 1 6 1 5 1 Safety of Laser Light 1 6 1 5 2...

Page 16: ...H T T P W W W F I X C L U B C O M C N...

Page 17: ...in design perfectly suited for installation on a desk and yet it is a mono color printer capable of turning out as many as 12 0 prints A4 every minute 2 Shorter Wait Time and Lower Power Consumption T...

Page 18: ...LGL LTR Executive postcard envelope user defined paper 76 2 to 215 9 mm in width 127 to 355 6 mm in length Cassette paper type plain paper 64 to 90 g m2 heavy paper 91 to 163 g m2 recycled paper tran...

Page 19: ...1 1 3 1 3 Name of Parts 1 3 1 External View 0009 2753 F 1 1 T 1 1 1 3 2 Cross Section View 0007 6027 F 1 2 1 Rear cover 6 Left cover 2 Upper cover 7 Right cover 3 Delivery tray 4 Pickup tray 5 Front c...

Page 20: ...1 2 1 Photosensitive drum 8 Developing cylinder 2 Pressure roller 9 Pickup roller 3 Fixing film assembly 10 Separation pad 4 Delivery roller 11 Feed roller 5 Primary charging roller 12 Transfer charg...

Page 21: ...ied with power OFF indicates that the machine is not supplied with power 2 Paper Lamp flashing indicates the absence of paper or the presence of a jam while a job is under way OFF indicates the presen...

Page 22: ...or Clothes 1 If your skin or clothes came into contact with toner use dry tissue to remove the toner and then wash with water 2 Do not use warm or hot water which will cause the toner to jell permane...

Page 23: ...H T T P W W W F I X C L U B C O M C N Chapter 2 TECHNICAL REFERENCE...

Page 24: ...H T T P W W W F I X C L U B C O M C N...

Page 25: ...2 4 1 6 Fixing Block 2 10 2 4 1 7 Drum Cleaning Block 2 11 2 4 2 High Voltage Control 2 11 2 4 2 1 Outline 2 11 2 4 2 2 Generation of the Primary Charging Bias 2 12 2 4 2 3 Generation of the Developin...

Page 26: ...1 Overview 2 19 2 7 1 2 Outline of Operation by Block 2 19 2 7 2 Engine Controller 2 20 2 7 2 1 Outline 2 20 2 8 FIXING UNIT DELIVERY SYSTEM 2 21 2 8 1 Overview Configuration 2 21 2 8 1 1 Overview 2 2...

Page 27: ...divided into 6 blocks the engine control system laser exposure system image formation system pickup and feed system fixing and delivery system external and control system F 2 1 To external devices Eng...

Page 28: ...ve Period Purpose Remarks WAIT Wait From power ON until the end of the main motor initial rotation To clean the drum surface of potential and to clean the transfer charging roller Toner cartridge in o...

Page 29: ...als to the laser driver PCB 5 The laser driver turns on the laser diode according to these signals 6 The laser beam moves through a collimating lens and a cylindrical lens to reach the 4 facet mirror...

Page 30: ...is turned on in a non image area 2 3 3 Laser Control 2 3 3 1 Auto Photo Current Control 0008 0094 The machine executes auto photo current control to make sure that the laser diode emits light at a spe...

Page 31: ...ing the rotation of the scanner motor 2 3 4 3 Detection of a Fault in the Scanner Motor 0008 0097 The CPU of the engine controller monitors the frequency comparator to find out whether the scanner mot...

Page 32: ...nto a visible image using toner and then the transfer charging roller moves it to print paper The toner image is then fused permanently into the fibers of the print paper by the work of heat and press...

Page 33: ...er step 6 fixing 5 Drum Cleaning Block In this block the residual toner left on the photosensitive drum is removed for collection as waste toner step 7 drum cleaning in which residual toner is removed...

Page 34: ...y signal coming from the video controller F 2 8 step 2 laser beam exposure In this step a static image is formed on the surface of the photosensitive drum When the machine scans the surface of the pho...

Page 35: ...omes close to the layer of the toner possessing a negative potential on the cylinder the difference in potential between the drum surface and the cylinder will cause the toner to move to the drum surf...

Page 36: ...an on demand method of fixing which is characterized by a low thermal capacity The fact also has enabled the machine to warm up quickly moreover the heater need not be supplied with power during stan...

Page 37: ...uitry is a circuit needed for the formation of images and consists of a primary charging bias circuit developing bias circuit and transfer charging bias circuit The primary charging bias circuit gener...

Page 38: ...oner transfer on the other hand the transfer charging DC negative bias is applied to the transfer charging roller at such times as when the roller needs to be cleaned The transfer charging bias genera...

Page 39: ...The sensor is also used to detect the width of paper in the course of a print job When a sheet other than of a small size i e 197 mm or more in width moves past the paper width detecting lever operate...

Page 40: ...ether print paper has reached or has moved past a specific point of the paper path If print paper fails to reach or move past a specific point within a specific period of time the CPU of the engine co...

Page 41: ...ssume the presence of a pickup stationary jam if the paper width sensor PS802 does not detect the trailing edge of paper within 200 msec after the paper width sensor PS802 has detected the leading edg...

Page 42: ...he holding plate The paper on the holding plate is picked up by the work of the pickup roller 4 The engine controller sends the laser beam detection signal BD to the video controller a specific period...

Page 43: ...493 The protective mechanisms include an overcurrent protective circuit that uses a fuse If short circuit or the like occurs because of some fault and as a result an overcurrent flows the fuses will m...

Page 44: ...H T T P W W W F I X C L U B C O M C N Chapter 2 2 18...

Page 45: ...and erasing of it electrically It is used to retain parameters of the printer unit that must remain unchanged e g USB serial number printing environment these parameters are retained when the power is...

Page 46: ...ording to the print command coming from the video controller The following is a block diagram of the circuit F 2 22 CPU IC902 The CPU is a 8 bit single chip microprocessor IC The CPU is equipped with...

Page 47: ...ter and the pressure from the pressure roller to permanently fuse the toner with the fibers of the print paper before it moves out of the fixing assembly Once outside the fixing assembly the print pap...

Page 48: ...target temperature Heater There is a single heater fixing heater H1 used to heat the fixing film ceramic heater Thermistor There is a single thermistor main thermistor TH1 used for the control of the...

Page 49: ...s printing so that the temperature of the fixing heater is lower than the target temperature thus preventing overheating of the fixing film 4 down sequence during continuous printing so as to prevent...

Page 50: ...7 V or less equivalent of 265 deg C the output of the comparator IC501 goes Low to turn off the transistor Q103 The fact will cause the relay RL101 to go off to cut off the power to the fixing heater...

Page 51: ...H T T P W W W F I X C L U B C O M C N Chapter 3 DISASSEMBLY AND ASSEMBLY...

Page 52: ...H T T P W W W F I X C L U B C O M C N...

Page 53: ...over 3 7 3 1 8 3 Removing the Front Cover 3 7 3 1 8 4 Removing the Engine Controller PCB 3 7 3 1 9 Video Controller Board 3 8 3 1 9 1 Removing the Right Cover 3 8 3 1 10 Power supply board 3 8 3 1 10...

Page 54: ...Removing the Right Cover 3 23 3 5 1 2 Removing the Left Cover 3 23 3 5 1 3 Removing the Front Cover 3 23 3 5 1 4 Removing the Upper Cover 3 24 3 5 1 5 Removing the Rear Cover 3 24 3 5 1 6 Removing the...

Page 55: ...the right cover 2 in the direction of the arrow to detach F 3 2 3 1 1 2 Removing the Left Cover 0008 3538 1 Open the delivery tray 1 2 Open the upper cover 2 3 Remove the screw 3 4 Remove the 4 claws...

Page 56: ...ting the upper cover be sure to fit the 2 hooks 2 used to release the fixing assembly in the 2 hook holes 1 found in the cover F 3 8 3 1 2 Right Cover 3 1 2 1 Removing the Right Cover 0008 0965 1 Open...

Page 57: ...tach F 3 12 3 1 4 Upper Cover 3 1 4 1 Removing the Right Cover 0008 3533 1 Open the delivery tray 1 2 Open the upper cover 2 3 Remove the screw 3 4 Remove the 4 claws 4 and slide the right cover 5 in...

Page 58: ...direction of the arrow to detach F 3 17 3 1 4 4 Removing the Upper Cover 0008 0971 1 Free the link stop 2 from the door link 1 2 Remove the 2 screws 3 F 3 18 3 Slide the upper cover 1 in the directio...

Page 59: ...w F 3 21 5 Remove the 3 claws 1 and slide the right cover 2 in the direction of the arrow to detach F 3 22 3 1 5 2 Removing the Left Cover 0008 3532 1 Open the delivery tray 1 2 Open the upper cover 2...

Page 60: ...the tray F 3 26 3 1 7 Pickup Tray 3 1 7 1 Removing the Pickup Tray 0008 0969 1 Free the 2 shafts 1 of the pickup tray 2 and detach the tray F 3 27 3 1 8 Engine controller board 3 1 8 1 Removing the R...

Page 61: ...ft cover 2 in the direction of the arrow to detach F 3 31 3 1 8 3 Removing the Front Cover 0008 3544 1 Remove the 2 claws 1 2 Slide the front cover 2 in the direction of the arrow to detach F 3 32 3 1...

Page 62: ...008 7939 1 Open the delivery tray 1 2 Open the upper cover 2 3 Remove the screw 3 4 Remove the 4 claws 4 and slide the right cover 5 in the direction of the arrow F 3 38 5 Remove the 3 claws 1 and sli...

Page 63: ...ry tray 1 2 Open the upper cover 2 3 Remove the screw 3 4 Remove the 4 claws 4 and slide the left cover 5 in the direction of the arrow F 3 42 5 Remove the 3 claws 1 and slide the left cover 2 in the...

Page 64: ...to fit the 2 hooks 2 used to release the fixing assembly in the 2 hook holes 1 found in the cover F 3 47 3 1 10 5 Removing the Rear Cover 0008 3575 1 Slide the rear cover 1 in the direction of the ar...

Page 65: ...on of the arrow F 3 51 5 Remove the 3 claws 1 and slide the right cover 2 in the direction of the arrow to detach F 3 52 3 1 11 2 Removing the Left Cover 0008 3577 1 Open the delivery tray 1 2 Open th...

Page 66: ...ink 1 2 Remove the 2 screws 3 F 3 56 3 Slide the upper cover 1 in the direction of the arrow 4 Remove the 2 claws 2 of the upper cover and detach the cover F 3 57 When mounting the upper cover be sure...

Page 67: ...Leading Edge Paper Width Sensor PCB 0008 1122 1 Disconnect the connector 1 and free the harness 3 from the harness guide 2 F 3 60 2 Remove the 2 screws 1 and detach the rear plate 2 F 3 61 3 Remove th...

Page 68: ...the right cover 2 in the direction of the arrow to detach F 3 64 3 2 1 2 Removing the Left Cover 0008 3549 1 Open the delivery tray 1 2 Open the upper cover 2 3 Remove the screw 3 4 Remove the 4 claws...

Page 69: ...1 4 While pushing on the pin 2 free the cable guide 3 5 Disconnect the connector 4 6 Remove the screw 5 F 3 70 7 Disconnect the cable connector 1 found on the right side of the machine then detach th...

Page 70: ...2 Open the upper cover 3 Remove the 2 claws 1 of the transfer charging roller 4 Remove the 2 claws 2 of the transfer guide 5 Detach the transfer charging roller 4 together with the transfer guide 3 6...

Page 71: ...free its right side 1 in the figure and pull it out toward the right 3 4 1 2 Removing the Right Cover 0008 3586 1 Open the delivery tray 1 2 Open the upper cover 2 3 Remove the screw 3 4 Remove the 4...

Page 72: ...nk 1 2 Remove the 2 screws 3 F 3 81 3 Slide the upper cover 1 in the direction of the arrow 4 Remove the 2 claws 2 of the upper cover and detach the cover F 3 82 When mounting the upper cover be sure...

Page 73: ...g the Fixing Assembly 0008 3591 1 Remove the 3 screws 1 and detach the fixing assembly 2 F 3 87 3 4 1 9 Removing the Pickup Assembly 0008 1059 1 Remove the 2 screws 1 and detach the rear plate 2 F 3 8...

Page 74: ...g the Pickup Solenoid 0008 1890 1 Disconnect the connector 1 and remove the screw 2 then detach the pickup solenoid 3 F 3 94 3 4 4 Manual Separation Pad 3 4 4 1 Removing the Separation Pad 0008 1070 1...

Page 75: ...eft cover 2 in the direction of the arrow to detach F 3 99 3 4 5 3 Removing the Front Cover 0008 3555 1 Remove the 2 claws 1 2 Slide the front cover 2 in the direction of the arrow to detach F 3 100 3...

Page 76: ...n detach the full flat cable 2 F 3 104 8 Disconnect the connector 1 and detach the engine controller PCB 2 F 3 105 3 4 5 5 Removing the Laser Scanner Unit 0008 3558 1 Remove the 4 screws 1 and detach...

Page 77: ...cover 2 in the direction of the arrow to detach F 3 109 3 5 1 2 Removing the Left Cover 0008 3582 1 Open the delivery tray 1 2 Open the upper cover 2 3 Remove the screw 3 4 Remove the 4 claws 4 and s...

Page 78: ...to fit the 2 hooks 2 used to release the fixing assembly in the 2 hook holes 1 found in the cover F 3 115 3 5 1 5 Removing the Rear Cover 0008 3585 1 Slide the rear cover 1 in the direction of the ar...

Page 79: ...e 4 claws 4 and slide the right cover 5 in the direction of the arrow F 3 120 5 Remove the 3 claws 1 and slide the right cover 2 in the direction of the arrow to detach F 3 121 3 5 2 2 Removing the Le...

Page 80: ...k 1 2 Remove the 2 screws 3 F 3 125 3 Slide the upper cover 1 in the direction of the arrow 4 Remove the 2 claws 2 of the upper cover and detach the cover F 3 126 When mounting the upper cover be sure...

Page 81: ...screws 1 and detach the fixing assembly 2 F 3 131 3 5 2 8 Removing the Fixing Film Unit 0008 1087 1 Free the harness 2 from the harness guide 1 F 3 132 2 Remove the 2 screws 1 and detach the fixing c...

Page 82: ...ry tray 1 2 Open the upper cover 2 3 Remove the screw 3 4 Remove the 4 claws 4 and slide the left cover 5 in the direction of the arrow F 3 137 5 Remove the 3 claws 1 and slide the left cover 2 in the...

Page 83: ...to fit the 2 hooks 2 used to release the fixing assembly in the 2 hook holes 1 found in the cover F 3 142 3 5 3 5 Removing the Rear Cover 0008 3609 1 Slide the rear cover 1 in the direction of the ar...

Page 84: ...fixing cover 2 F 3 148 3 Remove the 2 springs 1 and detach the 2 releasing levers 2 4 Remove the 2 locking plate 3 and detach the fixing film unit 4 F 3 149 3 5 3 9 Removing the Pressure Roller 0008 1...

Page 85: ...ry tray 1 2 Open the upper cover 2 3 Remove the screw 3 4 Remove the 4 claws 4 and slide the left cover 5 in the direction of the arrow F 3 153 5 Remove the 3 claws 1 and slide the left cover 2 in the...

Page 86: ...7 When mounting the upper cover be sure to fit the 2 hooks 2 used to release the fixing assembly in the 2 hook holes 1 found in the cover F 3 158 3 5 4 5 Removing the Rear Cover 0008 3607 1 Slide the...

Page 87: ...H T T P W W W F I X C L U B C O M C N Chapter 3 3 33 F 3 161...

Page 88: ...H T T P W W W F I X C L U B C O M C N...

Page 89: ...H T T P W W W F I X C L U B C O M C N Chapter 4 MAINTENANCE AND INSPECTION...

Page 90: ...H T T P W W W F I X C L U B C O M C N...

Page 91: ...lly Replaced Parts 4 1 4 1 1 Periodic Replacement Parts 4 1 4 2 Consumables 4 2 4 2 1 Consumable Parts 4 2 4 3 Periodical Service 4 3 4 3 1 Periodic Service 4 3 4 4 Cleaning 4 4 4 4 1 Items to Clean 4...

Page 92: ...H T T P W W W F I X C L U B C O M C N...

Page 93: ...H T T P W W W F I X C L U B C O M C N Chapter 4 4 1 4 1 Periodically Replaced Parts 4 1 1 Periodic Replacement Parts 0008 0559 No parts require periodic replacement in this printer...

Page 94: ...H T T P W W W F I X C L U B C O M C N Chapter 4 4 2 4 2 Consumables 4 2 1 Consumable Parts 0008 0561 No parts require consumables in this printer...

Page 95: ...H T T P W W W F I X C L U B C O M C N Chapter 4 4 3 4 3 Periodical Service 4 3 1 Periodic Service 0008 0562 The printer has no parts that require periodic servicing...

Page 96: ...nents as part of service work 1 Transfer Charging Roller As a rule do not touch or clean the part If absolutely necessary be sure to take full care not to touch the roller and bring solvent or oil int...

Page 97: ...ree paper 5 Separation Pad Dry wipe the rubber portion with lint free paper 6 Feed Roller Dry wipe with lint free paper Do not touch the sponge portion of the transfer charging roller Otherwise the ba...

Page 98: ...H T T P W W W F I X C L U B C O M C N...

Page 99: ...H T T P W W W F I X C L U B C O M C N Chapter 5 TROUBLESHOOTING...

Page 100: ...H T T P W W W F I X C L U B C O M C N...

Page 101: ...Mechanical Adjustment 5 1 5 1 1 1 Checking the Pressure of the Pressure Roller nip 5 1 5 2 SERVICE TOOLS 5 2 5 2 1 Special Tools 5 2 5 2 2 Solvent Oil List 5 2 5 3 Location of Convectors 5 3 5 3 1 Lo...

Page 102: ...H T T P W W W F I X C L U B C O M C N...

Page 103: ...per for the printout 2 With the printed face of the solid black print paper facing downward place it in the machine s manual feed tray 3 Make a text print 4 When the leading edge of the print paper st...

Page 104: ...rs use a firmly squeezed wet cloth No Name Use Components Remarks 1 Alcohol Cleaning plastic note rubber metal oil and toner stains Alcohol Flammable keep away from flame Purchase locally 2 Lubricant...

Page 105: ...W W F I X C L U B C O M C N Chapter 5 5 3 5 3 Location of Convectors 5 3 1 Location of Convectors 0009 4697 F 5 2 J102 J202 J203 J204 J201 J902 J910 J909 J904 J002 J905 J801 J1102 J802 J801 J4 J001 J...

Page 106: ...code Exxx xxx being 3 numerals is indicated in the sub message area T 5 2 Error code Major cause detection Remedy E000 The thermistor has an open circuit or a short circuit Check the connector of the...

Page 107: ...H T T P W W W F I X C L U B C O M C N Chapter 6 APPENDIX...

Page 108: ...H T T P W W W F I X C L U B C O M C N...

Page 109: ...OF ELECTRICAL COMPONENTS 6 1 6 1 1 Clutch Solenoid 6 1 6 1 1 1 Solenoid 6 1 6 1 2 Motor 6 2 6 1 2 1 Motor 6 2 6 1 3 Sensor 6 3 6 1 3 1 Sensor 6 3 6 1 4 Switch 6 4 6 1 4 1 Switch 6 4 6 1 5 Lamps Heater...

Page 110: ...H T T P W W W F I X C L U B C O M C N...

Page 111: ...H T T P W W W F I X C L U B C O M C N Chapter 6 6 1 6 1 OUTLINE OF ELECTRICAL COMPONENTS 6 1 1 Clutch Solenoid 6 1 1 1 Solenoid 0008 0929 F 6 1 T 6 1 Notation Name SL1 Pickup solenoid SL1...

Page 112: ...H T T P W W W F I X C L U B C O M C N Chapter 6 6 2 6 1 2 Motor 6 1 2 1 Motor 0008 0935 F 6 2 T 6 2 Notation Name M1 Main motor M1...

Page 113: ...P W W W F I X C L U B C O M C N Chapter 6 6 3 6 1 3 Sensor 6 1 3 1 Sensor 0008 0938 F 6 3 T 6 3 Notation Name PS801 Top of page sensor PS802 Paper width sensor PS803 Paper delivery sensor PS803 PS802...

Page 114: ...H T T P W W W F I X C L U B C O M C N Chapter 6 6 4 6 1 4 Switch 6 1 4 1 Switch 0008 0939 F 6 4 T 6 4 Notation Name SW101 Power switch SW301 Door switch SW101 SW301...

Page 115: ...H T T P W W W F I X C L U B C O M C N Chapter 6 6 5 6 1 5 Lamps Heaters and Others 6 1 5 1 Heater 0008 0941 F 6 5 T 6 5 Notation Name H1 Fixing heater H1...

Page 116: ...W W W F I X C L U B C O M C N Chapter 6 6 6 6 1 6 PCBs 6 1 6 1 PCBs 0008 0943 F 6 6 T 6 6 No Name 1 Power supply PCB 2 Top of Page Paper Width Sensor PCB 3 Engine controller PCB 4 Video controller PCB...

Page 117: ...H T T P W W W F I X C L U B C O M C N Mar 10 2005...

Page 118: ...H T T P W W W F I X C L U B C O M C N...

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