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Xerox Phaser 7750DXF, Service Manual

The Xerox Phaser 7750DXF is a high-performance color printer designed for professional results. Ensure optimal performance with the free Service Manual download available at manualshive.com. This comprehensive manual will guide you through maintenance and troubleshooting, keeping your printer running smoothly for years to come.

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Phaser 7750 Printer Service Manual

Image Processor Board 

1.

Turn the power OFF and unplug the printer.

Caution

The image processor board is susceptible to ESD damage. Observe proper 
ESD precautions.

2.

Disconnect all communication cables.

3.

Remove 4 screws securing the image processor board and remove the board.

4.

The following should be transferred to a the new board if the image processor 
board is being replaced.

■

Internal Hard Drive.

■

NVRAM chip to preserve the customer’s network and setup values.

■

Memory

■

Configuration Chip

Note

Make sure the image processor board is fully seated when reinstalling.

7750-248

NVRam

(socketed)

Summary of Contents for Phaser 7750DXF

Page 1: ...Service Manual P h a s e r C o l o r L a s e r P r i n t e r 7750...

Page 2: ......

Page 3: ...lowing servicing instructions are for use by qualified service personnel only To avoid personal injury do not perform any servicing other than that contained in the operating instructions unless you a...

Page 4: ...trademarks and QuickDraw is a trademark of Apple Computer Incorporated PCL and HP GL are registered trademarks of Hewlett Packard Corporation Windows and Windows NT are registered trademarks of Micros...

Page 5: ...enance procedure practice or condition that is necessary to efficiently accomplish a task A note can provide additional information related to a specific subject or add a comment on the results achiev...

Page 6: ...on or in the printer Use caution to avoid personal injury The surface is hot while the printer is running After turning off the power wait 30 minutes Avoid pinching fingers in the printer Use caution...

Page 7: ...rounded outlet If the product loses its ground connection contact with conductive parts may cause an electrical shock Disconnecting Power Turning the power off using the On Off switch does not complet...

Page 8: ...rist strap before applying power to the unit under test to avoid potential shock After removing a static sensitive assembly from its anti static bag place it on a grounded conductive surface If the an...

Page 9: ...and ground A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation Warning Labels Read and obey all posted warning labels Throughout the prin...

Page 10: ...t is easily accessible during servicing Warning Do not touch any electrical component unless you are instructed to do so by a service procedure Servicing Mechanical Components When servicing mechanica...

Page 11: ...ty compliance and could void the user s authority to operate this product To ensure compliance use shielded interface cables A shielded parallel cable can be purchased directly from Xerox at www xerox...

Page 12: ...equipment input current less than or equal to 16A per phase EN 61000 3 3 1995 IEC61000 3 3 Part 3 Limits Section 3 Limitation of voltage fluctuations and flicker in low voltage supply systems for equi...

Page 13: ...is neither dangerous for the consumer nor for the environment A signed copy of the Declaration of Conformity for this product can be obtained from Xerox Line voltage drop out IEC 61000 4 11 1994 95 d...

Page 14: ...xii Phaser 7750 Color Laser Printer...

Page 15: ...and Consumables 1 8 Printer Specifications 1 9 Physical Dimensions and Clearances 1 9 Mounting Surface Specification 1 10 Functional Specifications 1 12 Electrical Specifications 1 12 Environmental Sp...

Page 16: ...lator Belt Home Position Took Too Long Code 30 Accumulator Belt Home Position Failure Code 31 3 19 Accumulator Belt Edge Sensor Failure Code 32 Accumulator Belt Drive Logic Failure Code 34 3 22 Unexpe...

Page 17: ...er Eject Clamp Home Sensor On Failure Code 120 Finisher Eject Clamp Home Sensor Off Failure Code 121 3 58 Finisher Decurler Failure Code 122 3 59 Finisher Set Clamp Failure Code 123 3 60 Finisher Comm...

Page 18: ...int Fast Scan 8 Tone 5 11 Initial Actions Before troubleshooting any Print Quality Problems 5 12 6 Adjustments and Calibrations Registration Control RegiCon Adjustment Overview 6 2 Coarse and Fine Ske...

Page 19: ...t List 2 14 Tray 1 Feed Assembly 9 18 Part List 3 1 Laser ROS Assembly 9 19 Part List 4 1 Xerographic Module 1 of 2 9 20 Part List 4 2 Xerographic Module 2 of 2 9 21 Part List 5 1 Lift Unit 9 22 Part...

Page 20: ...11 10 Horizontal Transport Assembly 11 11 Horizontal Transport Top Open Front and Rear Cover 11 12 Horizontal Transport Entrance Upper Cover Assembly 11 13 Horizontal Transport Belts 11 14 Horizontal...

Page 21: ...Assembly 11 56 PL 17 10 Compiler Tray Assembly 11 58 PL 17 11 Stacker Elevator Assembly 11 60 PL 17 12 Exit Assembly 11 62 PL 17 13 Electrical Components 11 64 PL 17 14 Finisher Rack Stand 11 66 A App...

Page 22: ...xx Phaser 7750 Printer...

Page 23: ...n In this chapter Phaser 7750 Printer Configurations Parts of the Printer Phaser 7750 Front Panel Configuration Image Processor Board and Rear Panel Host Interface Routine Maintenance Items and Consum...

Page 24: ...Xerox Phaser 7750 Color Laser Printer Service Manual is the primary document used for repairing maintaining and troubleshooting the printer To ensure understanding of this product complete the Xerox P...

Page 25: ...e memory allows 1200 x 1200 dpi full clip path A3 image Post Script Fonts 137 137 137 137 PCL5c Fonts 81 81 81 81 Direct PDF 1 4 Support Std Std Std Std Job Pipelining Std Std Std Std Hard Drive Produ...

Page 26: ...e Down Tray 6 Finisher Top Door H Release 2 Front Door 7 Finisher Output Tray 3 Tray 1 MPT 8 Finisher Door J 4 2500 Sheet High Capacity Feeder 1500 Sheet Lower Tray Deck not shown 9 Front Door right s...

Page 27: ...nformation 1 5 Exterior Rear View 1 USB Connection 4 AC Power Cord Connection 2 Ethernet 10 100 Base T Connection 5 Latch for Left Door A 3 GFI Reset Button 6 Tray 1 MPT in closed position 3 4 5 6 775...

Page 28: ...Flashing Yellow Warning Flashing Red Continuously Error 1 LED Power Status 5 Up button scrolls up the menu system 2 Graphic front panel display 6 Down button scrolls down the menu system 3 Cancel butt...

Page 29: ...Rear Panel Host Interface The components on the image processor board are illustrated in the following figure 1 RAM SODIMM 6 Processor Fan 2 RAM SODIMM 7 NVRAM 3 USB Connector 8 Ethernet Connector 4...

Page 30: ...elt 5 Waste Cartridge Consumable capacity is based on 5 per color on A4 Letter paper Routine Maintenance Item capacity is based on A4 5 Routine Maintenance Consumables Transfer Roller 100 000 Cyan Ton...

Page 31: ...eder Dimensions Value Height 364 mm 14 3 in Width 644 mm 25 4 in Depth 682 mm 26 9 in Weight 40 kg 88 lbs 1500 Sheet Lower Tray Deck Dimensions Value Height 364 mm 14 3 in Width 644 mm 25 4 in Depth 6...

Page 32: ...printer The right hand side of the printer is more susceptible to problems due to foot placement 1 In order to function properly the printer must be located on a surface with the following minimum di...

Page 33: ...pecifications will void all guarantees of print quality and or performance Known problems that can occur as a result of exceeding the mounting surface specifications are Color to Color mis registratio...

Page 34: ...color First Page Out Letter A4 11 seconds color 10 seconds monochrome Warm up time Warm up time to Ready from power on or ENERGY STAR 40 seconds First page out from Ready 7 4 seconds mono 6 7 seconds...

Page 35: ...750 media and paper types print the Paper Tips Page from the printer s front panel Characteristic Specification Temperature Operating 10 to 32o C Storage 20 to 50o C Humidity Normal operating 10 to 85...

Page 36: ...1 14 Phaser 7750 Printer Service Manual...

Page 37: ...Chapter Theory of Operation In this chapter Summary of the Phaser 7750 Print Process Paper Path of the Printer EAHG Toner Technology Overview ROS and Regicon Technology Overview RegiCon Overview Senso...

Page 38: ...roller in the developer The magnet roller turns against the surface of the drum and is kept at a constant negative potential At areas on the drum surface where the negative charge has not been reduce...

Page 39: ...tial and transfers to the surface of the print media 7 Cleaning The accumulator belt cleaner consists of a cleaner blade in contact with the accumulator belt surface after the point where the toner is...

Page 40: ...inisher Paper can be inverted for 2 sided printing Trays 1 5 The paper trays consist of four main trays and one Multi Purpose Tray on the side of the printer Tray 1 MPT is located on the left side of...

Page 41: ...e inserted into the printer Tray presence is also detected by the paper size sensor Any actuation of the paper size sensor signals the tray is present Paper Feeding and Sensing Note The tray feed lift...

Page 42: ...the no paper sensor Tray 1 MPT Loading and Feeding When media is placed in Tray 1 the lead edge deactuates the Tray 1 no paper sensor The sensor signals the control logic that paper is present When t...

Page 43: ...paper path reverses the direction of paper travel and the duplex gates direct the paper through the inverter and into the duplex transport An image can then be placed on the second side of the media...

Page 44: ...r use larger than letter size Printing on heavy media Printing short edge feed Printing on transparencies or specialty media Three fuses on the fuse board in the fuser assembly are used in conjunction...

Page 45: ...be used for all Phaser 7750 Printer applications The image below shows the EA toner particles The small bumps are particles of additives that produce some of the characteristics of the new toner The i...

Page 46: ...second bias transfer roller to retract Switched DC Power Switched AC power from the AC Drive PWB goes to the low voltage power supplies for the printer Whenever switched AC power is provided to the t...

Page 47: ...24 Volt power supply by way of the interface board The motor enable and speed control signals come from the microprocessor on the engine control via the interface board Accumulator Belt Motor The accu...

Page 48: ...nd the other drives the K black drum Like the main motor the drum motors get 5 and 24 volt DC power from 5 and 24 volt power supplies via the interface board The motors are enabled and the speed is co...

Page 49: ...es consist of the T1 T2 and T3 HVPS the 24 Volt LVPS 3 3 VDC LVPS and the 2 5VDC LVPS High Voltage Power Supply T2 Board AC Drive Board Noise Filter Board GFI High Voltage Power Supply T3 Board High V...

Page 50: ...2 14 Phaser 7750 Printer Service Manual 24 V Low Voltage Power Supply 24 V Low Voltage Power Supply Fan 3 3 V Low Voltage Power Supply 5 V Low Voltage Power Supply AC Power Chassis 7750 448...

Page 51: ...ent MUST be made when the ROS is replaced NEVER remove the cover from a ROS module for ANY reason contamination will result Write Black Process The Phaser 7750 Printer uses a black writing process for...

Page 52: ...th before the image data becomes optical information in the form of modulated laser beams In the case of the Phaser 7750 printer the engine control board sequentially passes data that comprises the 4...

Page 53: ...re used in this procedure to determine the relative position of chevrons developed onto the accumulator belt The MOB sensors are located below the accumulator belt The RegiCon procedures read chevrons...

Page 54: ...nual The chevron patterns used for the RegiCon setup are shown in the following figure The components of the RegiCon adjustment include Skew Fine Setup Pattern 1 IN OUT Setup Pattern 1 Center Setup Pa...

Page 55: ...ron patterns During this procedure logic automatically performs a magnification adjustment so that the scan lines are the same length for all four colors 3 Center Setup The Center Setup procedure dete...

Page 56: ...lt can be opened Open the access door and activate the interlock Power down the Phaser 7750 printer Open the front door and release the accumulator belt by releasing the latch assembly and pulling dow...

Page 57: ...in which you see the images on the accumulator belt With the right hand door interlock activated turn the printer on Note For machines with finishers unplug the finisher from the Phaser 7750 printer p...

Page 58: ...k cable Engine Board I P Board Internal Test Patterns Imaging Unit Developer Housing ATC Sensors ROS Charge Rolls Toner Cartridge 4 Output ADC Sensor Fuser 2nd Transfer Roller 1st Transfer Roller 7750...

Page 59: ...lator Belt Edge Sensor Accumulator Belt Home Sensor Duplex Wait Sensor Automatic Toner Concentration Sensor K C M Y Environment Sensor Automatic Density Control Sensor Mark On Belt Sensor Waste Cartri...

Page 60: ...e Tone Up Down test in diagnostics compares a corrected target value to the ATC sensor value on each individual developer If the corrected target value is within 30 of the sensor value then printer lo...

Page 61: ...oks at patches that are developed onto the accumulator belt at various times Data from the ADC sensor is used to Adjust the intensity of each laser in the ROS Set the look up table for Tone Reproducti...

Page 62: ...TC Sensor s indication In this situation the machine would automatically tone up adding more toner to the developer housing The higher concentration of toner in the housing would then allow more toner...

Page 63: ...es all equal none the test has detected no problems LD Illum Warn None ADC Patch Fail None VBCR Warn None V Bias Warn None If Ave RADC Trans is within 20 of RADC Target then printer logic assumes the...

Page 64: ...2 28 Phaser 7750 Printer Service Manual Lower Tray Feeders Sensor and Board Locations 7750 459 LTD Board 3T HCF Board TT...

Page 65: ...ly Tray 3 Paper Size Switch Assembly Tray 4 Tray 5 Paper Size Switch Assembly Tray 3 Tray 4 Tray 5 Take Away Sensor No Paper Sensor Level Sensor Tray 3 Tray 4 Tray 5 Tray 4 Take Away Sensor Tray 5 Tak...

Page 66: ...r actuator tray 3 tray 4 tray 5 Left hand cover interlock switch actuator One way clutch tray 3 tray 4 Left hand cover interlock switch actuator Paper detect sensor actuator tray 3 tray 4 Friction clu...

Page 67: ...Chapter Error Messages and Codes In this chapter Introduction Overview for Troubleshooting Error Codes System Startup and POST Error Messages and Codes Index Table Error Messages and Codes Procedures...

Page 68: ...1 When an error first occurs record the error message and code then cycle power to the printer to see if the error recurs Always follow the safety measures detailed in the front of the manual when se...

Page 69: ...properly 3 Remove the Imaging Units and protect them from light 4 Clean and inspect the printer interior and remove any foreign objects dust or loose toner Note Use only a Toner Type II Vacuum Do not...

Page 70: ...nd Postscript software As appropriate install the latest version of software 5 Inspect the fuser assembly and clean if necessary 6 Inspect the MOB and ADC sensors clean if necessary 7 Inspect the accu...

Page 71: ...d the resulting actions you must follow to isolate the problem When a procedure instructs you to test a component using service diagnostics go to the Service Diagnostic Tests Table on page 4 3 for a d...

Page 72: ...int in the printer and you can use FG frame ground in place of any SG pin or test point 4 Before measuring voltages make sure the printer is switched ON the imaging units and the paper trays are in pl...

Page 73: ...tialized POST diagnostics are intended to provide a quick means of isolating a defective subsystem associated with the image processor board and SDRAM POST returns control to the boot loader and the o...

Page 74: ...ont panel and health LED The test name of the test that failed is displayed on the front panel Hard Fault Reporting Devices The health LED flashes according to the fault code A Vx Works text string is...

Page 75: ...est fails and the front panel message Please Install configuration chip displays EEPROM Hard 10 This test checks addressing of the EEPROM Ethernet Hard 11 This test checks the ethernet core CPU Interr...

Page 76: ...Position Took Too Long 04 346 pg 3 19 31 Accumulator Belt Home Position Failure 04 347 pg 3 19 32 Accumulator Belt Edge Sensor Failure 04 348 pg 3 22 33 Unexpected Accumulator Belt Home Sensor Signal...

Page 77: ...essages are associated with the optional Finisher 111 Finisher Stapler Move Sensor On Failure 12 241 pg 3 47 112 Finisher Stapler Move Sensor Off Failure 12 242 pg 3 47 113 Finisher Stapler Failure 12...

Page 78: ...ed Applicable Parts Wiring and Plug Jack Map Diagrams Laser Assembly Engine Control Board Troubleshooting Procedure Step Actions and Questions Yes No 1 1 Remove the rear cover from the printer 2 Disco...

Page 79: ...developer empty Replace the toner or developer Go to step 2 2 Is the ATC sensor clean and free of dust toner or any other contaminates Go to step 3 Clean the ATC sensor 3 1 Check the ATC sensor wiring...

Page 80: ...7 7 1 Remove the Imaging Unit Plate cover 2 Inspect the wiring harness between the engine control board and the developer housing assembly 3 Is the wiring harness defective Replace the wiring harness...

Page 81: ...developer empty Replace the toner or developer Go to step 2 2 Is the ATC sensor clean and free of dust toner or any other contaminates Go to step 3 Clean the ATC sensor 3 1 Check the ATC sensor wirin...

Page 82: ...engine control board and the developer housing assembly 3 Is the wiring harness defective Replace the wiring harness Replace the ATC sensor 8 Run approximately 10 pages of the solid fill full page pr...

Page 83: ...stics transmissive sensor test 2 Does the sensor operate correctly Go to step 4 Replace the sensor or left hand door assembly 4 1 Check the transfer roller transmission gears for damage 2 Are the gear...

Page 84: ...tions and Questions Yes No 1 Is the retract sensor or actuator damaged or out of position Repair or reseat the sensor Go to step 2 2 1 Run the 1st BTR motor contact retract test in diagnostics 2 Do th...

Page 85: ...installing a new assembly Visually inspect the accumulator belt area inside the printer and inside the left hand door for foreign objects or damaged parts Inspect the belt steering mechanism to determ...

Page 86: ...umulater belt assembly rotate the belt drive gear in the normal process direction until the belt home marker is positioned beneath the belt home sensor 2 Reinstall the belt assembly 3 Enter service di...

Page 87: ...13 12 1 Check the voltage at J532A17 on the harness 2 Is the voltage 24 VDC Replace the engine control board Replace the waste toner agitator motor 13 Is 24 VDC present at the low voltage power supply...

Page 88: ...onnector damaged Replace the accumulator belt assembly Go to step 2 2 Is the edge sensor actuator touching the belt Replace the accumulator belt assembly Go to step 3 3 1 Is the mating connector insid...

Page 89: ...accumulator belt assembly 2 Enter service diagnostics and run the Steering Motor test 3 Does the motor turn Replace the accumulator belt assembly If the problem is unresolved replace the engine contr...

Page 90: ...Yes No 1 1 Remove the accumulator belt assembly 2 Inspect the DTS connector for damage 3 Is the connector damaged Replace the accumulator belt assembly Go to step 2 2 1 Is the mating connector inside...

Page 91: ...2 Measure the resistance between the Fuser connector P600 4 and P600 6 3 Does the resistance measure between 30 K and 190 K Ohms Go to step 2 Replace the fuser assembly 2 1 Reinstall the fuser assemb...

Page 92: ...uestions Yes No 1 1 Turn OFF power and remove the Fuser Assembly 2 Measure the resistance between the fuser connector P600 4 and P600 6 3 Does the resistance measure between 30 K and 190 K Ohms Go to...

Page 93: ...Measure the resistance between the Fuser connector P600 4 and P600 6 3 Does the resistance measure between 30 K and 190 K Ohms Go to step 2 Replace the fuser assembly 2 1 Measure the resistance betwe...

Page 94: ...or poor connection 2 Is the wiring harness OK Replace the fuser assembly Replace the AC power chassis assembly 7 Check for 5 VDC at P J 590 5 on the AC Drive Board Go to step 8 Replace the engine cont...

Page 95: ...ance between the Fuser connector P600 7 and P600 9 3 Does the resistance measure between 30 K and 190 K Ohms Go to step 2 Replace the fuser assembly 2 1 Reinstall the fuser assembly 2 Enter service di...

Page 96: ...cool down 2 Measure the resistance between the Fuser connector P600 7 and P600 9 3 Does the resistance measure between 30 K and 190 K Ohms Go to step 2 Replace the fuser assembly 2 1 Reinstall the fu...

Page 97: ...ure the resistance between the Fuser connector P600 7 and P600 9 3 Does the resistance measure between 30 K and 190 K Ohms Go to step 2 Replace the fuser assembly 2 1 Measure the resistance between fu...

Page 98: ...poor connection 2 Is the wiring harness OK Replace the fuser assembly Replace the AC power chassis assembly 7 1 Check for 5 VDC at P J 590 3 on the AC drive board Go to step 8 Replace the engine contr...

Page 99: ...tep 2 2 1 Check for voltage at J222 4 2 Does the voltage measure 24 VDC Go to step 3 Check the wiring to the fuser fan if the wiring is OK replace the engine control board 3 Does the front panel indic...

Page 100: ...correctly If the problem persists replace the engine control board Go to step 8 8 1 Check for voltage at J214 4 2 Is 24 VDC present Go to step 9 Check the wiring to the LVPS fan if the wiring is OK re...

Page 101: ...to troubleshoot and resolve the missing voltage 4 1 Enter service diagnostics 2 While running the Imaging Unit Motor test check the voltage at J210 1 and J210 2 3 Is the voltage 0 VDC while the test i...

Page 102: ...Unit Plate Assembly Troubleshooting Procedure Step Actions and Questions Yes No 1 1 Replace the imaging unit reporting the error 2 Does the error still appear Go to step 2 Complete 2 1 Remove the ima...

Page 103: ...Use wirenet 8 2 to troubleshoot the missing 24 VDC 4 Run the Black Imaging Unit Motor test from diagnostics Is the voltage at J235 5 0 VDC with the test running Go to step 5 Use wirenet 8 2 to troubl...

Page 104: ...etween the gray wire and frame ground 2 Does the voltage measure 5 VDC Go to step 4 Go to step 3 3 1 Remove the rear cover and rear shield 2 Measure the voltage at J407B 17 on the engine control board...

Page 105: ...Step Actions and Questions Yes No 1 1 Cycle power to the printer to clear the error 2 Turn the printer off 3 Remove the Image processor board IP board cover and metal cover 4 Inspect the orange ribbon...

Page 106: ...ge processor board Troubleshooting Procedure Step Actions and Questions Yes No 1 1 Cycle power to the printer to clear the error 2 Did this clear the error Complete Replace the engine control board Tr...

Page 107: ...ep 7 2 1 Pull out and then reseat Tray 2 2 Does the lift motor operate Go to step 3 Go to step 4 3 1 Did the Error Code 87 clear from the front panel Complete This could be an intermittent problem If...

Page 108: ...place the engine control board 9 1 Using service diagnostics check the level sensor and no paper sensor 2 Does the level indicate H Replace in order until resolved tray level sensor no paper sensor LT...

Page 109: ...ions Yes No 1 Is J610 2 between 0 15 and 3 1 VDC Go to step 2 Go to step 3 2 Is J532B 6 between 0 15 and 3 1 VDC Replace in the following order engine control interface board engine control board Trou...

Page 110: ...Go to step 2 Use the wirenets to troubleshoot and repair the open wire 2 Is J668 3 on the tray module board 24 VDC Go to step 3 Use the wirenets to troubleshoot and repair the open wire 3 1 Check the...

Page 111: ...VDC Go to step 4 Go to step 3 3 1 Check the wire between Pin 2 and engine control board Pin 8 for an open circuit or poor contact 2 Is the wiring OK Replace the board Repair or replace the wiring harn...

Page 112: ...w change state Replace the sensor Go to step 3 3 1 Check for a short between sensor Pin 2 and engine control board Pin 8 2 Is there a short Replace the wiring harness Go to step 4 4 1 Is there 5 VDC b...

Page 113: ...passed through the 1st position of the dual staple moving to the rear staple position Troubleshooting References Applicable Parts Wiring and Plug Jack Map References Finisher Control Board Staple Move...

Page 114: ...ual 5 Is 24 VDC present at P847 4 Replace the finisher control board Troubleshoot the 24 VDC interlock circuit using the Troubleshooting the 24 VDC LVPS on page 4 18 Troubleshooting Procedure Continue...

Page 115: ...nd 2 Does the voltage change between 0 and 5 VDC when the sensor is blocked and unblocked Replace the finisher control board Go to step 3 3 1 Measure the voltage at the Finisher Board connector P852 1...

Page 116: ...ler Close Motor test running is 24 VDC present at J847 7 Replace in the following order stapler head assembly finisher control board Troubleshoot and repair the 24 VDC interlock circuit Troubleshootin...

Page 117: ...r motor operate Check the tampering mechanism for a mechanical problem Go to step 3 3 1 Check pins J877 A pins 1 3 4 and 6 2 Is 24 VDC present on any of the pins Go to step 4 Go to step 5 4 1 Check th...

Page 118: ...operate Check the tampering mechanism for a mechanical problem Go to step 3 3 1 Check pins J878A pins 1 3 4 and 6 2 Is 24 VDC present on any of the pins Go to step 4 Go to step 5 4 1 Check the follow...

Page 119: ...oes the value change between H and L Go to step 2 Troubleshoot using the transmissive sensor procedure 2 1 Run the Finisher Stacker Motor Down test in diagnostics 2 Does the stacker tray lower Go to s...

Page 120: ...ce Manual 7 Is 24 VDC present at P J 847 11 with the Finisher Stacker Motor Down test running in diagnostics Replace the stacker motor Replace the finisher control board Troubleshooting Procedure Step...

Page 121: ...o step 2 Troubleshoot using the transmissive sensor procedure 2 1 Run the Finisher Stacker Motor Down test in diagnostics 2 Does the stacker tray lower Go to step 5 Go to step 3 3 Does the stacker mot...

Page 122: ...nual 7 Is 24 VDC present at P J 847 11 with the Finisher Stacker Motor Down test running in diagnostics Replace the stacker motor Replace the finisher control board Troubleshooting Procedure Continued...

Page 123: ...eferences Finisher Control Board Staple Move Motor Troubleshooting Procedure Step Actions and Questions Yes No 1 1 Manually move the staple head 2 Does the head move smoothly from front to rear Go to...

Page 124: ...inisher while leaving the connector plugged in 2 Check the Set Clamp home sensor in diagnostics 3 Does the value change from H to L while blocking and unblocking the sensor Go to step 2 Use the transm...

Page 125: ...Does the value change between H and L Go to step 2 Troubleshoot using the transmissive sensor procedure 2 Does the decurler cam clutch operate in diagnostics Check for a mechanical problem with the de...

Page 126: ...Go to step 2 Use the transmissive Sensor procedure to diagnose and repair the sensor 2 Does the solenoid energize when running the Set Clamp Paddle test in diagnostics Go to step 3 Go to step 4 3 1 R...

Page 127: ...n this order Finisher Control Board Engine Control Board Perform continuity checks on any wiring harnesses involved Finisher Staple Mode Logic Failure Code 125 There are no diagnostic routines for pro...

Page 128: ...3 62 Phaser 7750 Printer Service Manual...

Page 129: ...g In this chapter Introduction Service Diagnostics Front Panel Troubleshooting Inoperable Printer Troubleshooting Troubleshooting Power Supplies and Interlocks Media Jams and the Paper Path Operating...

Page 130: ...problems quickly and isolate which component or sub assembly part needs replacement Service diagnostics are to be executed through the front panel by a certified service technician only Service Diagn...

Page 131: ...nt data in tests requiring user input OK Enters the highlighted menu Executes the current test item Used to select a data value entered by the user Test Front Panel Display Test Operation Definition P...

Page 132: ...inuous sheets simplex duplex offset media type weight finisher staple Source tray Tray 2 5 Tray1 MPT Yes No Press Up Down to change setting Current sheets is n Select new sheets Yes No Press Up Down t...

Page 133: ...or by blocking the sensor and watching its state change on the front panel NOTE Several jam sensors only change state if a jam has occurred All doors interlock switches must remain closed or defeated...

Page 134: ...is L H Paper present L Paper not present Tray Feed Sensors Feed Out 1 is L Take Away F O 2 is L Feed Out 3 is L Feed Out 4 is L Feed Out 5 is L H Paper present L Paper not present Stack Full Sensor St...

Page 135: ...s the media size Refer to the media switch table in the Wiring Diagrams chapter of this manual L Tray not lifted H Tray lifted H Paper not present L Paper present NOTE Level 6 entries for Trays 3 5 fo...

Page 136: ...is H Eject Home is L Set Clamp Home is L Decurler Cam Position L Optional only if Finisher is installed H Open actuated or paper present L Closed deactuated or no paper present Motors Fans Tests Test...

Page 137: ...ontinue Yes No Motor On Motor Off Please cycle power to printer now NOTE The accumulator belt must be removed prior to running this test 1st BTR Retract Contact Motor Press Back or Cancel to abort NOT...

Page 138: ...l Motors Off Press Up Down to change setting Paper Path No Pick NoPaperRun Init Runs a complete print cycle only No paper is picked and no toner is dispensed Finisher Motors Optional Optional Miscella...

Page 139: ...Solenoid On Solenoid Off Press OK to run test ADC Shutter Open Solenoid On ADC Automatic Density Correction Press OK to run test ADC Shutter Close Solenoid Off ADC Automatic Density Correction Press...

Page 140: ...power to the printer now CAUTION To avoid damaging the Accumulator Belt it is recommended that you leave the belt cleaner installed and perform the Belt Edge Learn test instead see RegiCon 1 Fine Skew...

Page 141: ...NVRAM Writes data to HD Are you sure Yes No This takes data from engine NVRAM and stores it onto the drive See Store Engine NVRAM on page 6 21 Exit Exits to PostScript without running POST Test Front...

Page 142: ...the splash screen now appears replace the hard drive 6 Replace the image processor board see page 8 38 LVPS Fuser and ROS Fans On Front Panel LED is Red No Front Panel Message 1 Observe the blinking...

Page 143: ...mplementary pair serial data link The finisher also generates its own 5 VDC from 24 VDC supplied by the printer Troubleshooting Procedure Step Actions and Questions Yes No 1 Check that the finisher is...

Page 144: ...ircuit from the GFI to the noise filter the AC driver board and up to the power switch 4 Switch the printer on If the GFI trips unplug the printer remove the fuser then retest 5 Remove the rear cover...

Page 145: ...is see Troubleshooting AC Power on page 4 16 2 Remove the image processor board cover and metal plate Disconnect the relay board power connector J300 3 Switch the printer on Check for 3 3 VDC at J510...

Page 146: ...op of the LVPS 7 If correct voltage is not present unplug the top connector and retest If no voltage is present replace the LVPS If the voltage returns check the harness image processor board engine b...

Page 147: ...C 2 With all doors closed and printer power on check for 24 VDC between P531 1 of the engine control board and frame ground 3 If 24 VDC is not present see See Troubleshooting the 24 VDC LVPS on page 1...

Page 148: ...or when a door is closed completing the 24 VDC circuit and the engine control board interrogates the imaging unit NVRAM If the imaging units are present then the waste cartridge is missing by default...

Page 149: ...nd appropriate for a laser printer quality office laser printer paper works best 2 Ensure that the printer is within its environmental specifications by using the built in service diagnostics temperat...

Page 150: ...Is the printer operating within its environmental specifications 4 Ensure that the loaded media type matches the settings on the front panel 5 Check the fuser exit sensor and the POB sensor in service...

Page 151: ...you solve printing problems and obtain the best results from your printer Access this page from the printer s front panel To print the Configuration Page 1 At the printer s front panel select Printer...

Page 152: ...the one on the Configuration Page You may need to click the Configure Port button to see the IP address If necessary re select the TCP IP number used for the printer Printing a Test Page 1 Click the G...

Page 153: ...rtup column Automatic 7 Click Start click Settings then click Printers 8 Right click the printer icon then select Properties Verify that you have installed the correct driver for your printer 9 Select...

Page 154: ...reWare DP verify the following Novell Networks You are required to load Novell IntraNetWare Client or Microsoft Client for IPX networks TCP IP Networks No additional software is required but your prin...

Page 155: ...al steps If your printer name does not appear proceed to Step 3 3 Verify that the printer is plugged in turned on and connected to an active network 4 Verify the cable connection from the network to t...

Page 156: ...Services a Launch your web browser b Enter your printer s IP address in the browser s Address field http xxx xxx xxx xxx c Select Support d Click the PhaserSMART Diagnostic Tool link to access Phaser...

Page 157: ...me type type config at the Novell console screen On networks using multiple IPX frame types it is critical that the frame type be set correctly 7 Verify that the Primary Server is set NetWare 3 1x onl...

Page 158: ...een On large networks using multiple IPX frame types it is critical that the frame type be set correctly PDL is set to your desired PDL PostScript or PCL or to Auto Primary Server for NetWare 3 x only...

Page 159: ...If necessary create a new queue to test the printer b The Primary Server lists the server name on the Configuration Page Printing a Document 1 Click the Tools drop down list 2 Select the Send File men...

Page 160: ...4 32 Phaser 7750 Printer Service Manual...

Page 161: ...5 Chapter Print Quality Troubleshooting In this chapter Print Quality Problems Overview Front Panel Test Prints Service Test Prints Print Engine Only Test Print Print Quality Troubleshooting...

Page 162: ...hed Print a Usage Profile to determine the temperature and humidity the printer has been operating under Compare this to the environmental specifications for the printer found in Environmental Specifi...

Page 163: ...Spots Deletions Mottle Uneven density front to rear Repeating defects 28 3 mm 1 1 in The Accumulator Belt Assembly Potential Defects usually all colors Spots Deletions Banding Uneven density front to...

Page 164: ...from the printer and to assist in troubleshooting problems This section shows how to select and analyze all test prints available to the Phaser 7750 printer Troubleshooting Print Quality Page Selectin...

Page 165: ...s a full page each of 25 CMYK a page of 80 solid fill red a page consisting of 25 tint vertical CMYK bands with each band labeled and finally the test pattern shown in the second figure below 7750 184...

Page 166: ...tration procedures in Chapter 6 2 Color Registration Vertical The colored lines should match up as shown below If necessary see the registration procedures in Chapter 6 3 Uniform RGB The secondary col...

Page 167: ...bleshooting 5 7 Solid Fill Pages Selecting Solid Fill Pages causes a group of six pages as shown below to print that consist of 80 solid fill on individual pages of CMYK for primary colors and BG for...

Page 168: ...s the item such as the transfer roller causing the defect For example the distance between these two marks represents a defect repeating every 44 mm this is caused by an imaging unit When correcting a...

Page 169: ...er to be configured as desired for printing any of the following Test Prints The selectable options are Source tray Number of sheets to print Simplex or duplex operation Offset Media type Output desti...

Page 170: ...mary colors and RG for secondary Colors should be uniform from top to bottom of the page with no mottling and the density for each color should be approximately equal Print Grid 1 Dot Prints a square...

Page 171: ...stinct graduated bands of the color forming a block in the center of the page and a seventh band with density that falls between the two lightest in the block located at the bottom of the page The var...

Page 172: ...supported by the printer and the tray being used Verify the media settings are correct in both the printer driver software and at the printer s front panel Check the color correction and print mode se...

Page 173: ...he overall image density is too light in all colors 1 Verify the transfer roller has not reached its end of life 2 Run the Calibrate for Paper routine 3 Check the accumulator belt assembly for mis ali...

Page 174: ...nostics and test the shutter motor Does the laser shutter motor work properly Remove an imaging unit and see if the shutter opens and closes freely 4 Inspect the wiring harness for loose or disconnect...

Page 175: ...er system Ensure that the toner auger motor operates Ensure that the toner dispense assembly is carrying toner from the toner cartridge to the developer 7 Remove the accumulator belt assembly and insp...

Page 176: ...orm wide bands from leading edge to trailing edge B size print shown The printer displays no error code Note A size prints are processed through the printer with the short edge of the print parallel t...

Page 177: ...leshooting Menu select Print Quality Problems then select Solid Fill Pages If the missing bands only occur in a single primary color replace the imaging unit of the affected color or swap imaging unit...

Page 178: ...ugh the printer with the long edge of the print parallel to the paper path making artifacts parallel to the short axis of the print 1 Inspect the paper that is loaded in the paper tray Is the paper wr...

Page 179: ...is with the accumulator belt belt cleaner transfer roller or fuser Random Spotting There are spots of toner randomly scattered across the page The printer displays no error code Single Color 1 Inspec...

Page 180: ...ral blank sheets of paper through the printer to clean the fuser rollers From the front panel s Troubleshooting Menu select Print Quality Problems then select Repeating Defects Page The Repeating Defe...

Page 181: ...that the loaded media matches the front panel settings 3 Try using an approved media to see if the spots still appear 4 Run the Calibrate for Paper routine From the front panel s Printer Setup Menu se...

Page 182: ...er routine From the front panel s Printer Setup Menu select Calibration Setup then select Calibrate for Paper Note Printing on some specialty papers such as some glossy finish papers may show some bac...

Page 183: ...s Information Pages Menu select Paper Tips Page 2 Make sure that the paper loaded in the tray matches the paper type selected on the printer s front panel 3 If the problem continues set the paper typ...

Page 184: ...Try printing from supported media 4 Ensure that the loaded media matches the front panel settings In some cases switching the paper type setting for example from Heavy Laser Paper to Thin cover Index...

Page 185: ...ter driver 3 Ensure supported media is being used 4 For specialty papers experiment with alternate paper type settings such as Heavy Laser Paper Thick Cover Index or others 5 Run the Calibrate for Pap...

Page 186: ...Is the correct weight paper loaded in the tray 3 Ensure that the paper guides are set to the correct position for the paper loaded in the tray 4 Try printing from the other trays If the problem only o...

Page 187: ...panel 3 Ensure that genuine Xerox toner is installed in the printer 4 If the problem continues set the paper type in the front panel to the next lightest type of paper than what you are using 5 If the...

Page 188: ...5 28 Phaser 7750 Printer Service Manual...

Page 189: ...perform various alignment and calibration procedures The printer is shipped aligned registered and calibrated In this chapter Registration Control RegiCon Adjustment Overview RegiCon Adjustment Proce...

Page 190: ...ian replaces the Laser Unit or where color registration is bad The printer registration process consists of the following adjustments and is briefly summarized in this overview Fine Skew Adjustment In...

Page 191: ...1 Fine adjustments the front side of each line is adjusted to be level with the rear end In Out Skew Adjustment The In Out Skew Adjustment Magnification ensures that all four scan lines are the same...

Page 192: ...enter Skew Adjustment Magnification Balance adjusts the linearity of the scan lines During RegiCon 3 the printer measures a specific midpoint of each scan line and adjusts it to a horizontal reference...

Page 193: ...This will display the Hidden Service menu Then scroll to RegiCon Setup Cycle and press Enter to display the RegiCon test menu The procedures are listed in the order they need to be performed for optim...

Page 194: ...s correctly positioned in the center and repeat the RegiCon 3 test 2 Does the test pass now Go to step 7 Diagnose and repair the MOB sensor 7 1 Print the Grid 1 Dot test print 2 Do the colors all alig...

Page 195: ...splays Processing Data Please Wait 3 Highlight Do 1 Fine Skew Setup and press OK The front panel now displays Testing Please Wait 4 Wait until the test results are displayed as follows Note Only 5 lin...

Page 196: ...ot be necessary to rerun the test after making this adjustment 1 From the Hidden Service menu highlight the RegiCon Setup Cycle menu and press OK 2 The first time any RegiCon test is requested the pag...

Page 197: ...ation balance There are no manual adjustments required after completing the test Note To perform this test move the mark on belt sensor to the CENTER position After the test has been run the mark on b...

Page 198: ...nd 2 tests have already passed The sensor has a wedge fit when in position for the number 3 center position If the mark on belt sensor not correctly positioned it can cause the test to fail Recheck th...

Page 199: ...roblems a Mark On Belt Sensor failure Developer Developer Bias Voltage Imaging Unit or Engine Control Board Failure Perform the Coarse RegiCon Initialization on page 6 12 This adjusts the horizontal a...

Page 200: ...ds Yes No Note In all the following steps Cyan is the reference line and cannot be adjusted so you need to adjust all the other lines towards the Cyan line 4 From the Built in Test Prints menu select...

Page 201: ...s No question c Answer No to Set Skew Error threshold Yes No d Answer Fast to the Which scan direction Fast Slow 6 Select which color of YMK to adjust Select how many millimeters 1 5 to adjust Select...

Page 202: ...the bottom The first digit is always 0 The other digits range between 0 and 99 To set the new values 1 Enter Service Diagnostics 2 Highlight Adjustments Calibrations menu and press OK 3 Highlight ATC...

Page 203: ...ing the calibration values from the engine NVRAM have been written to the hard drive The stored values can be written back to the engine NVRAM by performing a front panel Restore Engine NVRAM Now rese...

Page 204: ...athway from the Main Menu is Troubleshooting Print Quality Problems 3 Highlight Calibrate Colors and press OK 4 Highlight Restore Factory Settings and press OK 5 Highlight Restore Factory Settings NOW...

Page 205: ...ore Factory Settings and press OK to reset the margin settings Resetting All Printer Default Settings NVRAM Resetting the NVRAM resets all printer values including network printer setup job defaults c...

Page 206: ...n Setup and press OK 4 Reset Connection Setup NOW is displayed press OK Resetting Belt Cleaner Assembly Life Resetting the belt cleaner life is to be performed only if the belt cleaner assembly is rep...

Page 207: ...values resets the job defaults front panel language Intelligent Ready Tray 1 MPT tray 2 5 setup Startup Page front panel intensity front panel contrast PostScript error information and ENERGY STAR ti...

Page 208: ...Service Diagnostics and press OK to enter Service Diagnostics 5 Highlight NVRAM Access and press OK 6 Highlight Clear Tech Rep Faults and press OK 7 Highlight the Link Code s to be reset and press OK...

Page 209: ...acing the engine control board Engine Control Board You must store engine NVRAM values to the hard drive after replacement of the hard drive 1 From the Main Menu highlight Troubleshooting and press OK...

Page 210: ...6 22 Phaser 7750 Printer Service Manual...

Page 211: ...7 Chapter Cleaning and Maintenance In this chapter Service Preventive Maintenance Procedure Recommended Tools Cleaning...

Page 212: ...d the number of sheets printed Recommended Tools Toner vacuum cleaner Type II Clean water Clean dry lint free cloth Black light protective bag Cleaning Caution Never apply alcohol to any parts in the...

Page 213: ...8 Chapter Service Parts Disassembly In this chapter Overview General Notes on Disassembly Disassembly Procedures...

Page 214: ...erse the removal procedure shown In some instances the replacement procedure is included because it may contain special steps For specific assemblies and parts refer to Service Parts Lists on page 9 1...

Page 215: ...rew can damage tapped holes Do not use excessive force to either remove or install either a screw or a printer part When replacing a screw in plastic rotate it CCW until you feel it fall into the orig...

Page 216: ...1 Open the front cover 2 Remove 3 screws 1 screw is located behind the right hand door 3 Lightly press downward to release the four hidden tabs behind the right side cover then pull the cover away fr...

Page 217: ...board metal cover and disconnect the front panel cable from the Relay Board P564 5 Remove the top cover Front Panel Removal 1 Open the front door 2 Release the front panel assembly by inserting a scr...

Page 218: ...n cover and disconnect the auxiliary feeder wiring harness before removing the rear cover 2 Remove 4 screws securing the rear cover to the printer 3 Pull the top edge of the rear cover assembly about...

Page 219: ...captive tab on the front and side of this cover that resists the upward pull Place your finger on the front side of the cover to release the tab and pull towards you Cover Left Hand Rear Mid 1 Remove...

Page 220: ...wer Cover 2 Disconnect the wiring harness and free from the clamp near the rear pivot Note Note the positioning of the wiring harness for reinstallation 3 With a flat tip screwdriver pry out the pivot...

Page 221: ...wiring harness and clip from the printer s frame and pull the harness through the access hole 4 Remove 2 screws securing Tray 1 and then pull the assembly out of the printer A slight lift on the righ...

Page 222: ...llers 1 Open the Left Hand Door A and locate the pick rollers near the duplex chute 2 Lift the tab and slide the white retainers away from the pick rollers 3 Slide the pick rollers off the retaining p...

Page 223: ...Remove the fuser front cover 5 Open the left cover 6 Remove 1 screw from the plastic harness cover and remove the cover 7 Disconnect 3 wiring harnesses 8 Remove the retaining clip off the link mountin...

Page 224: ...door on the hinge pins and manually align the marks on the motion damper before completing the installation Failure to align the gears can result in binding and gear damage WHEN REASSEMBLING ALIGN THE...

Page 225: ...Hand Door A 3 Rotate the duplex chute downward until the keyed pivot shaft can be removed from the pivot bracket 4 Remove the duplex chute Note The duplex chute must be in the up position to install T...

Page 226: ...nsport Assembly 1 Open the Left Hand Cover Assembly Left Door 2 Remove the e clip and remove the roller assembly 3 Remove 2 screws securing the inverter transport assembly to the Left Hand Door and re...

Page 227: ...ove the 2 screws from the plastic flanges that secure the transport assembly in the printer frame Note Note the wiring harness position for reinstalling and make certain the wires are routed behind th...

Page 228: ...he locating pin position then loosen the one screw that secures the assembly to the frame and remove the shutter motor assembly Replacement Procedures Caution Verify that the lever is correctly positi...

Page 229: ...the lower tray bracket 5 Remove the Tray 1 feeder assembly 6 Some manipulation may be required to disengage the gears Removal of Motor 1 Disconnect the wiring harness from the motor 2 Remove the two s...

Page 230: ...se care in removing the waste cartridge 1 Remove the waste cartridge 2 Remove 1 screw securing the waste cartridge pivot hinge and remove the hinge and cover 3 Remove the waste cartridge sensor holder...

Page 231: ...8 19 Imaging Unit Plate Cover 1 Open the front door 2 Remove fuser front cover 3 Lower the main lever 4 Slide imaging units 1 and 3 out slightly 5 Remove 4 black screws 6 Remove the plastic imaging u...

Page 232: ...Y M C K then reinstalled K C M Y 1 Open the Front Door 2 Remove the Imaging Units as necessary Note Cover the exposed opening with a wide piece of tape to avoid spillage The tape will not stick unless...

Page 233: ...embly on page 8 29 Caution Be careful when moving the stops they are easily broken and may come out completely 6 Remove the screw holding each dispense assembly to the printer 7 Remove the dispense as...

Page 234: ...waste cartridge sensor holder see page 8 18 4 Remove the imaging unit plate cover see page 8 19 5 Remove the dispense assemblies see page 8 20 6 Disconnect the wiring harnesses to all four developer h...

Page 235: ...r removal of the Developer s Tilt the imaging unit plate assembly forward enough to allow the developer s to be removed Do not disconnect the imaging unit plate harnesses 9 Remove 1 screw securing the...

Page 236: ...lling There are two locating holes in the imaging unit plate assembly that correspond to locating pins on the frame of the printer Failure to align the holes with the pins prior to tightening screws c...

Page 237: ...rd enough to allow the developer s to be removed Do not disconnect the imaging unit plate harnesses 1 Partially remove the imaging unit plate assembly 2 A locating pin is at the back of each developer...

Page 238: ...procedure Use only a type II toner vacuum to clean up any spilled toner Check the temperature sensitive label on the developer beads If the label has turned dark the beads have been exposed to a highe...

Page 239: ...two augers Do not let the developer mix accumulate heavily on the roller Keep the developer housing assembly level 4 Reinstall the cover making sure that the rear tabs are all engaged in their respec...

Page 240: ...page 8 4 2 Remove the top cover assembly see page 8 5 3 Remove the dispense housing assemblies see page 8 20 4 Remove the 2 screws that secure the toner dispense motor assembly to the printer frame 5...

Page 241: ...Imaging Unit Plate Cover see page 8 22 2 Disconnect the wiring harness 3 Remove the 3 screws securing the Steering Drive Assembly and remove the assembly from the printer Replacement Procedures Note...

Page 242: ...ridge sensor holder see page 8 18 6 Disconnect the purple harnesses 7 Remove the wiring harness from three clips 8 Remove 1 black screw to remove the mark on belt assembly Replacement Procedures Note...

Page 243: ...8 8 3 Remove the fuser front cover 4 Open left hand cover 5 Remove the 1 screw securing the transport assembly cover and remove the cover 6 Disconnect the harnesses to the transport assembly and the l...

Page 244: ...5 3 Remove the right side cover 4 Note the routing of the wiring harness Note It is easier to re install the wire harness if the fuser fan and plastic mounting bracket are removed from the printer 5...

Page 245: ...e clips and washers from the right hand lift jack roller guides 10 Remove the 4 black screws holding the right hand lift bracket to the Accumulator Belt Frame and remove the bracket 11 Remove the 1 sc...

Page 246: ...a 2 5 mm hex driver remove the 2 screws on the left side of the belt cleaner assembly 5 Remove the belt cleaner assembly being careful not to spill toner Replacement Procedures Caution Never run the...

Page 247: ...upright position 5 Remove 2 screws securing the Waste Auger Assembly 6 Shift the waste auger assembly to remove the drive shaft from the bearing and remove the waste auger assembly Note Be careful no...

Page 248: ...at engine board P400 and 401 4 Undo the retainers and undo the wiring harness Note Observe the routing of the laser unit wiring harness up to the engine control board the information will be needed d...

Page 249: ...Procedures Note You must perform the RegiCon adjustment procedures after replacing the Laser Unit see RegiCon Adjustment Procedures on page 6 5 Note Store the NVRAM values to the hard drive after cali...

Page 250: ...all communication cables 3 Remove 4 screws securing the image processor board and remove the board 4 The following should be transferred to a the new board if the image processor board is being repla...

Page 251: ...it remove 4 screws from the bottom side of the image processor board holding the Internal Hard Drive 3 Slide the internal hard drive away from the connector Replacement Procedures Caution It is possib...

Page 252: ...rd see page 8 38 6 Disconnect the 9 wiring harnesses along the edges of the engine controller board 7 of these harnesses are in front of the controller board The other 2 are on the left side 7 Two of...

Page 253: ...Tilt and insert the electrical chassis under the two loosened screws 2 Carefully lower the assembly onto the engine control interface board connector 3 Push lightly in the center of the assembly to en...

Page 254: ...he engine board 4 Remove the 8 screws securing the engine control board metal shield and remove the shield 5 Remove the remaining 6 screws and remove the engine control board Replacement Procedures Ca...

Page 255: ...iring harnesses 3 Loosen the 2 mounting bracket screws and remove the interface board from the white plastic mounting posts Method 2 1 Lower the HVPS assembly to a horizontal position 2 Disconnect the...

Page 256: ...ng harness from the printer and remove the 4 screws that secure the low voltage power supply to the mounting bracket 1 Move the T1 and T3 power supplies out of the way 2 Disconnect P Js 510 511 15 and...

Page 257: ...Parts Disassembly 8 45 LD Power Relay 1 Remove the rear cover and shield 2 Disconnect the wiring harness 3 Remove 2 screws securing the LD power assembly 4 Remove the LD power assembly Fig 2 Fig 1 77...

Page 258: ...the power supply needs to be removed disconnect the wiring harness and loosen the 2 screws that secure the power supply to the PS mounting bracket 3 Disconnect the wiring harness at P502 P505 and P2 f...

Page 259: ...wer Supply and Bracket see page 8 46 2 Disconnect the high voltage wires from the KCMY connectors 3 Disconnect the wiring harness from J575 and J576 4 Remove the 2 screws that secure the T2 power supp...

Page 260: ...pply assembly 3 Disconnect the wiring harnesses P15 and P16 the AC drive wiring harness P43 and the individual wires at J39 J40 J41 and J47 of the AC drive board 4 Disconnect the AC wires from P15 and...

Page 261: ...n drive to ensure the gears move freely Remove the Fuser unit to give better visibility 1 As the main drive assembly is being installed into position make sure the gears are meshed completely with the...

Page 262: ...rear cover and shield 2 Move the T1 and T3 power supplies out of the way 3 Remove any components covering the motor which is mounted to the frame at the rear top left corner 4 Remove the 3 screws that...

Page 263: ...ng harness from the developer drive assembly 3 Clear the high voltage lines 4 Remove the 2 black screws securing the developer drive assembly to the printer frame and remove from the printer Replaceme...

Page 264: ...see page 8 43 7 Disconnect the wiring harnesses 1 to YMC and 1 to K to the Print Engine Drive Assembly 8 Remove the 2 screws securing the finisher connector now accessible after removing the right co...

Page 265: ...T3 high voltage power supply 2 Remove the 3 3 VDC and 5 VDC low voltage power supplies see page 8 44 3 Disconnect the wiring harness from the Tray 1 paper select switches 4 Remove the 2 screws that s...

Page 266: ...Slide the main lever gears under the lift jack assembly racks and lift into position Verify that the timing marks on the main lever and the lift jack assemblies align The main lever assembly requires...

Page 267: ...eft 2 Upper right 3 Then the lower screws Verify that the timing marks on the main lever and the lift jack assembly align Left Hand Lift Jack Assembly 1 Ensure that the lift frame assembly is fully li...

Page 268: ...Remove the LH lever hinge 12 Remove the 4 screws that hold the LH lift jack bracket and remove the bracket 13 Remove the 4 screws holding the LH lift jack assembly and remove from the printer Note Whe...

Page 269: ...Parts Disassembly 8 57 Optional Lower Trays Right Side Door 1 Remove the 4 screws securing the right hand cover and remove Rear Cover 1 Remove the 4 screws securing the cover 2 Remove the rear cover 7...

Page 270: ...D HCF Cover Assembly 1 Open Door C 2 Remove 1 screw from each of the support straps 3 Remove 1 screw from the cover s front pivot bracket 4 Remove the cover assembly from the rear pivot 7750 164 Rear...

Page 271: ...ket and remove the bracket 2 Pull Tray 4 out of the printer High Capacity Feeder HCF Tray 5 and Paper Transport 1 Open Tray 5 2 Remove the 2 screws that secure the Tray 5 stopper 3 Remove the 2 screws...

Page 272: ...Select Switches 1 Remove the paper tray 2 Reach inside the cabinet and disconnect the wire harness 3 Reach inside the cabinet and remove the 1 screw that secures the paper select switch Universal Tra...

Page 273: ...er assembly 6 Some manipulation may be required to disengage the gears Removal of Motor 1 Disconnect the wiring harness from the motor 2 Remove the 2 screws securing the motor to the feeder bracket 3...

Page 274: ...t Hand and Right Hand Gear HCF 1 Remove the rear cover 2 Remove the 2 screws securing the bracket assembly Gear RH 2 or Gear LH 1 to the frame 3 Remove the bracket assembly Replacement Procedures Note...

Page 275: ...9 Chapter Service Parts Lists In this chapter Serial Number Format Using the Parts List Hardware Kits Recommended Service Tools...

Page 276: ...ce number of the printer produced on that day The serial number is coded as follows The text S N followed by the serial number in the barcode The barcode does not include a field identifier The nine d...

Page 277: ...e individual parts called out in parentheses 7 The notation with X Y following a part name indicates an assembly that is made up of components X through Y For example 1 with 2 4 means part 1 consists...

Page 278: ...9 4 Phaser 7750 Printer Service Manual Parts List 1 1 Drive Unit s4500 345...

Page 279: ...and part name 1 116 1752 00 Drum Drive Assembly DRIVE ASSY DRUM 4 116 1753 00 Accumulator Belt Drive DRIVE ASSY IBT 7 116 1754 00 Developer Drive Assembly DRIVE ASSY DEVE 14 116 1755 00 Main Drive As...

Page 280: ...Printer Service Manual Part List 1 2 Main Drive Motor Assembly Main Drive Motor Assembly PL 1 2 No Part number Qty Part Description and part name 13 116 1539 00 Developer Clutch Assembly CLUTCH ASSY...

Page 281: ...ering Motor and MOB Steering Motor and Mark On Belt PL 1 3 No Part number Qty Part Description and part name 1 116 1104 00 Belt Steering Drive Assembly DRIVE ASSY STEERING 4 116 1124 00 Mark On Belt S...

Page 282: ...rt List 2 1 Tray 2 Tray 2 PL 2 1 No Part number Qty Part Description and part name 1 116 1093 00 Tray Stopper STOPPER TRAY 2 Spacer N S 3 116 1126 00 Paper Supply Switch Assembly SWITCH ASSY P S 4 119...

Page 283: ...Lower Cover Assy Tray 2 Feeder and Left Lower Cover Assembly PL 2 3 No Part number Qty Part Description and part name 1 116 1160 00 Tray 2 Feeder Assembly FEEDER ASSY 2 116 1181 00 Lower LH Cover Asse...

Page 284: ...er 7750 Printer Service Manual Part List 2 4 Tray 2 Feeder Tray 2 Feeder PL 2 4 No Part number Qty Part Description and part name 1 116 1109 00 Motor Assembly MOTOR ASSY 16 116 1211 00 Roller Kit s775...

Page 285: ...Parts Lists 9 11 Part List 2 6 Registration Transport Registration Transport PL 2 6 No Part number Qty Part Description and part name 1 116 1758 00 Registration Transport Assembly TRNSPORT ASSY REGI s...

Page 286: ...ver Unit Left Cover Unit PL 2 7 No Part number Qty Part Description and part name 1 116 1540 00 11 23T Tooth Damper Gear GEAR DAMPER 11T 23T 3 116 1541 00 Left Hand Damper Gear White DAMPER LH 5 116 1...

Page 287: ...8 No Part number Qty Part Description and part name 3 108R00579 2nd BTR Transfer Roller Assembly 2NDBTR ASSEMBLY 12 116 1543 00 Exit Switch Assembly SWITCH ASSY EXIT 14 116 1098 00 Duplex Chute Assemb...

Page 288: ...over Assembly 2of 2 Left Cover Assembly 2 of 2 PL 2 9 No Part number Qty Part Description and part name 3 116 1760 00 Second Motor Assembly MOTOR ASSY 2ND 6 116 1544 00 Paper on Belt POB Sensor 17 114...

Page 289: ...rts Lists 9 15 Part List 2 10 Exit Transport Assembly Exit Transport Assembly PL 2 10 No Part number Qty Part Description and part name 1 116 1762 00 Exit Transport 2 116 1196 00 Exit Transport Cover...

Page 290: ...9 16 Phaser 7750 Printer Service Manual Part List 2 12 Tray 1 1 of 2 Tray 1 1 of 2 PL 2 12 No Part number Qty Part Description and part name 1 116 1763 00 Tray 1 MPT FEEDER ASSY MSI s7750 359...

Page 291: ...Service Parts Lists 9 17 Part List 2 13 Tray 1 2 of 2 Tray 1 PL 2 13 No Part number Qty Part Description and part name 5 116 1763 00 Tray 1 MPT Extension s7750 360...

Page 292: ...y 1 Feed Assembly PL 2 14 No Part number Qty Part Description and part name 14 116 1765 00 Feed Roller Assembly ROLLER ASSY FEED 15 116 1820 00 2 Feed Roller Kit 19 116 1166 00 Retard Pad PAD ASSY RET...

Page 293: ...Service Parts Lists 9 19 Part List 3 1 Laser ROS Assembly Laser ROS Assembly PL 3 1 No Part number Qty Part Description and part name 2 116 1768 00 Laser Assembly ROS ASSEMBLY s7750 36...

Page 294: ...e 1 of 2 Xerographic Module 1 of 2 PL 4 1 No Part number Qty Part Description and part name 2 108 R005 75 Waste Toner Cartridge 3 116 1138 00 Sensor Holder Assembly HOLDER ASSY SNS 7 108 R005 81 Imagi...

Page 295: ...Xerographic Module 2 of 2 PL 4 2 No Part number Qty Part Description and part name 1 116 1769 00 Xerographic Plate Assembly PLATE ASSY XERO OPB 6 116 1770 00 Image Unit Mounting Rail Y M C ERASE ASST...

Page 296: ...9 22 Phaser 7750 Printer Service Manual Part List 5 1 Lift Unit s7750 366...

Page 297: ...2 116 1199 00 RH Frame Lift Assembly FRAME ASSY LIFT RH 3 116 1772 00 Bearing 4 116 1773 00 Washer 5 Plate N S 6 116 1202 00 Lift Arm Latch Assembly LATCH ASSY AST 7 116 1200 00 LH Handle Hinge HINGE...

Page 298: ...Belt Assembly Accumulator Belt Assembly PL 5 2 No Part number Qty Part Description and part name 1 116 1774 00 Accumulator Belt Assembly KIT IBT UNIT OPB 7 116 1180 00 Waste Toner Auger Assembly AUGE...

Page 299: ...s 9 25 Part List 5 6 Accumulator Belt Elevator Accumulator Belt Elevator PL 5 6 No Part number Qty Part Description and part name 4 116 1777 00 Accumulator Belt Elevator IBT ELEVATOR FRAME includes it...

Page 300: ...9 26 Phaser 7750 Printer Service Manual Part List 6 1 Developer Unit 1 of 2 s7750 372...

Page 301: ...Y 2 106 R006 51 Yellow Toner Cartridge 3 116 1779 00 Magenta Toner Dispenser DISP ASSY M 4 106 R006 50 Magenta Toner Cartridge 5 116 1780 00 Cyan Toner Dispenser DISP ASSY C 6 106 R006 49 Cyan Toner C...

Page 302: ...2 No Part number Qty Part Description and part name 1 116 1783 00 Developer Housing HSG ASSY DEVE 5 116 1784 00 Black Developer Beads Developer K 6 116 1785 00 Yellow Developer Beads Developer Y 7 11...

Page 303: ...ervice Parts Lists 9 29 Part List 7 1 Fuser Assembly Fuser Assembly PL 7 1 No Part number Qty Part Description and part name 1 115 R000 25 115 R000 26 Fuser Assembly 110V Fuser Assembly 220V s7750 374...

Page 304: ...me 1 116 1788 00 Laser Shutter Motor 4 116 1789 00 LH Lower Inner Cover COVER INNER L H LOW 6 116 1176 00 Fuser Fan Assembly FAN ASSY FUSER 8 116 1790 00 Laser Fan FAN ASSY ROS 9 116 1831 00 Developer...

Page 305: ...Service Parts Lists 9 31 11 116 1834 00 Bottom Fan Duct Not Shown Location Underneath Power Supplies Air System PL 8 1 No Part number Qty Part Description and part name...

Page 306: ...9 32 Phaser 7750 Printer Service Manual Part List 9 1 Electrical Components 1 of 3 s7750 377...

Page 307: ...rt name 1 116 1791 00 HVPS T1 2 116 1792 00 HVPS T3 4 116 1793 00 116 1150 00 3 3 LVPS 110V 3 3 LVPS 220V 5 116 1151 00 116 1152 00 5V LVPS 110V 5V LVPS 220V 6 116 1829 00 Interface Engine Control Boa...

Page 308: ...ical Components 2 of 3 Electrical Components 2 of 3 PL 9 2 No Part number Qty Part Description and part name 1 116 1796 00 116 1797 00 AC Power Chassis Assembly 110V AC Power Chassis Assembly 220V 13...

Page 309: ...3 No Part number Qty Part Description and part name 1 116 1223 00 Developer Block 2 116 1312 00 Wire Harness 3 116 1307 00 Wire Harness Y M 4 116 1308 00 Wire Harness C K 5 116 1913 00 2nd Wire Harne...

Page 310: ...number Qty Part Description and part name 3 116 1800 00 Front Cover Assembly COVER ASSY FRONT MN 6 116 1187 00 Strap 7 116 1116 00 ROS Window Cleaning Wand CLEANER ASSY 9 116 1117 00 ROS Window Clean...

Page 311: ...er Qty Part Description and part name 1 116 1802 00 Top Cover Assembly TOP COVER 5 116 1803 00 Front Panel CONTROL PANEL 7 116 1805 00 Front Fuser Cover COVER AY F FRONT MN 9 116 1806 00 Link Assembly...

Page 312: ...3 116 1954 00 Rear Cover Assembly COVER ASSY REAR 4 Rear Cover p o item 3 5 116 1188 00 Lower Tray Unit Harness Cover COVER BLIND TM 6 116 1189 00 Left Hand Rear Middle Cover COVER L H R MID 7 116 119...

Page 313: ...vice Parts Lists 9 39 Part List 11 1 Inverter Transport Inverter Transport PL 11 1 No Part number Qty Part Description and part name 1 116 1809 00 Inverter Transport Assembly TRANSPORT ASSY INV s7750...

Page 314: ...7750 Printer Service Manual Part List 12 1 Duplex Unit Assembly Duplex Unit Assembly PL 12 1 No Part number Qty Part Description and part name 2 116 1810 00 Duplex Transport Assembly TRANSPORT ASSY DU...

Page 315: ...Engine Board 2 116 1811 00 Engine Control Board PWB MCU 3 650 4306 00 671 5316 80 Image Processor Board 4 156 4837 00 156 4663 00 156 4857 00 128 MB RAM SODIMM 256 MB RAM SODIMM 512 MB RAM SODIMM 5 6...

Page 316: ...Trays 3 4 5 Assembly Lower Trays 3 4 5 Assembly PL 16 1 No Part number Qty Part Description and part name 2 119 6504 00 Tray 3 7 116 1090 00 Tray 4 8 116 1089 00 Tray 5 9 116 1126 00 Tray 3 Paper Siz...

Page 317: ...of 2 Lower Trays Paper Feeder 1 of 2 PL 16 5 No Part number Qty Part Description and part name 4 116 1838 00 Tray 5 Transport Assembly 16 116 1816 00 Tray 5 Feeder 19 116 1218 00 Tray 5 Feed out Sens...

Page 318: ...art List 16 6 Lower Trays Paper Feeder 2 of 2 Lower Trays Paper Feeder 2 of 2 PL 16 6 No Part number Qty Part Description and part name 1 116 1815 00 Takeaway Roller 8 116 1173 00 Chute Assembly 12 Ch...

Page 319: ...Service Parts Lists 9 45 Part List 16 13 Left Cover Assembly LTD Left Cover Assembly LTA PL 16 13 No Part number Qty Part Description and part name 1 116 1185 00 Left Cover Assembly s7750 400...

Page 320: ...r Service Manual Part List 16 14 Tray 4 5 Lift Gear Assembly Left Cover Assembly LTA PL 16 14 No Part number Qty Part Description and part name 2 116 1171 00 Gear Assembly Tray 4 3 116 1170 00 Gear As...

Page 321: ...6 15 Electrical Components and Caster Electrical Components LTA PL 16 15 No Part number Qty Part Description and part name 4 116 1099 00 Takeaway Motor 2 5 116 1814 00 Takeaway Motor 1 12 116 1818 00...

Page 322: ...t Description and part name 1 116 1814 00 Tray 3 Module Motor Assembly MOTOR ASSY 3TM 2 116 1813 00 LTD Circuit control Board TRAY MODULE PWB 3 116 1206 00 Caster Locking CASTER ASSY S 4 116 1221 00 C...

Page 323: ...ription vendor description 116 1912 00 Sensor Kit 116 1210 00 Sensor Flag Kit 116 1211 00 Roller Kit 116 1820 00 Tray 1 MPT Roller Kit 116 1300 00 Hardware Kit 065 0630 00 1 Complete Repackaging kit 0...

Page 324: ...9 50 Phaser 7750 Printer Service Manual...

Page 325: ...10 Chapter Wiring Diagrams In this chapter Plug Jack Locations Table Plug Jack Locator Maps Wiring Diagrams Wiring Schematics...

Page 326: ...Unit 104 Map 7 3 Exit Transport Assembly 106 Map 19 3 Left Lower Assembly Tray 2 Feeder 108 Map 19 2 Left Lower Assembly Tray 2 Feeder 109 Map 5 4 Registration Transport Assembly 111 Map 3 14 Inverter...

Page 327: ...ower Assembly Tray 2 Feeder 207 Map 1 11 Xerographic 208 Map 16 24 I F PWB MAIN Motor LVPS T2 210 Map 16 22 I F PWB MAIN Motor LVPS T2 211 Map 6 8 Fuser Assembly 212 Map 6 11 Fuser Assembly 214 Map 12...

Page 328: ...Assembly 240 Map 5 2 Registration Transport Assembly 251 Map 3 6 Inverter Transport Assembly 255 Map 2 4 MOB Sensor Assembly 260 Map 6 5 Fuser Assembly 261 Map 6 6 Fuser Assembly 262 Map 6 3 Fuser As...

Page 329: ...ssembly 529 Map 10 4 ROS Assembly 530 Map 16 13 I F PWB MAIN Motor LVPS T2 531 Map 16 7 I F PWB MAIN Motor LVPS T2 532 Map 16 14 I F PWB MAIN Motor LVPS T2 533 Map 16 1 I F PWB MAIN Motor LVPS T2 534...

Page 330: ...HVPS T1 T3 24V LVPS 57 Map 12 18 HVPS T1 T3 24V LVPS 57 Map 16 12 I F PWB MAIN Motor LVPS T2 57 Map 16 11 I F PWB MAIN Motor LVPS T2 580 Map 12 14 HVPS T1 T3 24V LVPS 581 Map 12 2 HVPS T1 T3 24V LVPS...

Page 331: ...7 Inverter Transport Assembly 639 Map 16 5 I F PWB MAIN Motor LVPS T2 J640 Map 3 11 Inverter Transport Assembly P640 Map 17 6 Developer Motor Tray 2 Size Switch 641 Map 16 6 I F PWB MAIN Motor LVPS T2...

Page 332: ...6 1 Fuser Assembly FS39 Map 18 3 AC Drive PWB Noise Filter PWB Delay PWB FS40 Map 18 2 AC Drive PWB Noise Filter PWB Delay PWB FS41 Map 18 4 AC Drive PWB Noise Filter PWB Delay PWB FS45 Map 18 9 AC D...

Page 333: ...2 Toner Dispense Motor Y M C K Main Switch FS183 Map 9 3 Toner Dispense Motor Y M C K Main Switch FS184 Map 9 4 Toner Dispense Motor Y M C K Main Switch FS185 Map 9 5 Toner Dispense Motor Y M C K Main...

Page 334: ...er Service Manual Plug Jack Locator Maps Map 1 7750 062 P J207 P J130 P J223 P J129 P J131 P J132 P J224 P J171 P J225 P J233 P J619 P J608 P J602 P J631 P J622 P J624 P J226 P J614 P J154 P J133 P J1...

Page 335: ...10 11 Map 2 MOB Sensor Assembly 7750 063 P J117 P J144 P J255 P J116...

Page 336: ...10 12 Phaser 7750 Printer Service Manual Map 3 Inverter Transport 7750 064 P J102 P J218 J633 P J217 P J215 P J251 INVERTER TRANSPORT ASSEMBLY P J216 P J111 P626 P J140 P633 P J113 J612 J613 J640...

Page 337: ...10 13 Map 4 Duplex Transport P J136 P J538 J626 P J539 P J540 P J135 DUPLEX TRANSPORT ASSEMBLY 7750 065...

Page 338: ...10 14 Phaser 7750 Printer Service Manual Map 5 Fuser 7750 066 P J109 P J240 7 2 6 FUSER ASSEMBLY J600 P J155 P J620 P J231 REGISTRATION TRANSPORT ASSEMBLY ROS SHUTTER MOTOR...

Page 339: ...10 15 Map 6 Fuser P J212 P J211 P J264 WHT P600 BLK FUSER REAR P J260 BLU P J261 RED P J263 P J262 FS38 FS37 7750 067...

Page 340: ...10 16 Phaser 7750 Printer Service Manual Map 7 Exit Transport 7750 068 P J104 P J220 P J611 P J222 P J172...

Page 341: ...8 Tray 1 Map 9 Toner Dispense Motor YMCK Switch J610 P J265 P J219 P J103 7750 069 7750 070 FS180 P J288 P J227 FS69 FS68 FS56 FS57 P J228 P J163 P J229 P J230 P J165 FS187 FS186 FS185 FS184 FS183 FS...

Page 342: ...18 Phaser 7750 Printer Service Manual Map 10 ROS Laser Assembly Map 11 Accumulator Belt P J527 P J515 P J514 P J529 P J526 P J528 P J516 P J517 P J518 7750 071 7750 072 P J605 P J122 P J237 P J121 P J...

Page 343: ...10 19 Map 12 HVPS T1 and T3 and 24V LVPS P J572 P J570 P J801 P J502 P J505 P J2 P J72 FS51 P J214 J925 J903 P J580 P J668 P J669 P J571 P J574 P J501 P J573 P J581 HVPS T3 7750 073...

Page 344: ...10 20 Phaser 7750 Printer Service Manual Map 15 Fuser Fuse Board P460 MCU PWB BOTTOM VIEW P J401 P J402 P J403 P J407 P J404 P J405 P J406 P J498 P J400 J496 J410 7750 076...

Page 345: ...Board Main Motor LVPS and T2 P J533 P J568 P J550 P410 P J639 P J641 P J531 P J536 P J534 P J203 P J576 P J575 P J530 P J532 P J511 P J16 P J553 P J510B P J15A P J535 P800 P J210 P J510 P J208 P J551...

Page 346: ...10 22 Phaser 7750 Printer Service Manual Map 17 Developer Motor and Tray 2 Size Switch 7750 078 P J235 P J234 P610 P612 P613 P640 P J221 P J646 P J232 P J115...

Page 347: ...10 23 Map 18 AC Drive Noise Filter and Delay Board J70 FS76 P J593 FS90 FS77 FS61 FS62 DELAY PWB NOISE FILTER PWB AC DRIVE PWB P J46 FS40 FS39 FS41 P J590 P J592 FS47 FS48 FS45 P J42 P J43 7750 079...

Page 348: ...10 24 Phaser 7750 Printer Service Manual Map 19 Left Lower Assembly and Tray 2 Feeder P J205 P J108 P J106 TRAY 2 FEEDER P J125 P J617 P J623 P J150 7750 080...

Page 349: ...3 and 4 Feeders HCF LH COVER INTERLOCK SWITCH FS813 FS812 7750 081 TRAY3 P J827 TRAY4 P J828 TRAY3 P J815 TRAY4 P J819 TRAY3 P J814 TRAY4 P J818 TRAY 3 4 FEEDER P J670 P J841 P J672 P J821 TRAY 3 FEED...

Page 350: ...10 26 Phaser 7750 Printer Service Manual Map 21 Tray 3 Feeder HCF P J822 P J823 P J829 P J825 TRAY 3 FEEDER 7750 082...

Page 351: ...10 27 Map 22 Trays 3 4 and 5 Paper Size Switches HCF 7750 083 TRAY 5 PAPER SIZE SWITCH TRAY 4 PAPER SIZE SWITCH TRAY 3 PAPER SIZE SWITCH P J824 P J816 P J820...

Page 352: ...10 28 Phaser 7750 Printer Service Manual Map 23 HCF Lower Tray Rear P J548 P J541 P J549 P J561 P J554 P J553 P J674 P J842 P J826 P J552 P J555 P J547 P J564 P J557 P J546 7750 084...

Page 353: ...RN ORN ORN ORN BLU A1 B1 B1 ESS PWB J300 A 24 VDC 2 OF X B 24 VDC 3 OF X C 24 VDC 3 OF X SEE WIRE NET 24VDC 2 1 7 1 7 1 7 J172 J171 J171 J569 J569 ORN ORN ORN ORN A1 I F PWB J535 A1 BLU 24VDC INTLK SE...

Page 354: ...535 J534 J532 N C J533 J550 P207 J207 J240 P240 J233 P233 J232 J235 J210 J576 ORN ORN ORN 2 6 1 4 2 1 1 5 1 5 3 B5 A5 4 3 3 4 4 13 12 DOUBLE PLUG DOUBLE PLUG DOUBLE PLUG DOUBLE PLUG DOUBLE PLUG DOUBLE...

Page 355: ...1 FS90 FS61 FS62 BLK PLUG IN ACH POWER ON ACH BLK PLUG IN ACN FS51 WHT T55 G Y DELAY RELAY PWB PL9 2 RELAY ON ACH TO AC DRIVE PLUG IN ACN TO AC DRIVE BLK PLUG IN ACH TO PSW OUTLET BLK PLUG IN ACH TO...

Page 356: ...3 3V LVPS 2 POWER ON ACH TO 3 3V LVPS 1 POWER ON ACH TO 3 3V LVPS 1 POWER ON ACH TO 24V LVPS 1 POWER ON ACH TO 24V LVPS 1 POWER ON ACH TO IIT OUTLET POWER ON ACH TO IIT OUTLET POWER ON ACH TO 5V LVPS...

Page 357: ...24VDC J214 P214 24VDC DC COM 3 2 4 1 1 4 DOUBLE PLUG MOT FAN LVPS FAN PL9 1 3 2 P214 J214 DOUBLE PLUG DC330 004 200 LVPS FAN LOCKED H 3 3VDC BLU J406 B13 MCU PWB PL13 1 LVPS FAN LOCK FAIL SIGNAL LVPS...

Page 358: ...10 P668 J668 J555 J510 J300 J400 VIO 3 5 T3 B8 B9 B6 B5 B7 B11 ESS PWB PL13 1 3 3VDC 1 3 3VDC 3 3VDC 3 3VDC 2 MCU PWB PL13 1 1 F PWB P19 1 P J410 32 56 B3 B10 J532 YEL YEL J536 3 3VDC MSI SIZE SENSOR...

Page 359: ...ALL ALL ALL ALL ALL J400 5 3 I F PWB PL9 1 J530 GRY VIO J530 J534 2 4 1 3 B5 B3 YEL YEL YEL YEL MCU PWB PL13 1 A5 4 A7 DOUBLE PLUG DOUBLE PLUG 5VDC 5VDC TO INTERLOCK 5VDC J406 J400 P640 J640 J626 J53...

Page 360: ...M DC COM DC COM VIO J400 I F PWB PL9 1 J530 ORN VIO VIO J505 J502 ORN VIO DC COM 24VDC J502 24VDC J300 ORN DC COM VIO 1 4 8 7 14 A4 A6 8 3 6 12 10 7 8 9 11 6 5 7 7 2 6 1 6 A B T3 3 3 4 4 2 J2 ESS PWB...

Page 361: ...BLU FS135 WASTE CARTRIDGE INTERLOCK SWITCH PL4 1 FS134 2 1 P631 J154 J154 J535 J153 J153 WASTE CARTRIDGE INTERLOCK CLOSED H 5VDC DC330 001 300 FRONT INTERLOCK CLOSED H 24VDC DC330 001 301 LH COVER INT...

Page 362: ...LU BLU 1 8 TRAY MODULE POWER INTERLOCK SWITCHING FS812 FS813 TRAY MODULE LH COVER INTERLOCK SWITCH PL15 10 16 13 DC330 001 304 TRAY MODULE LH COVER INTERLOCK CLOSED H 24VDC J554 3 DC COM 5VDC 24VDC TM...

Page 363: ...LOCK DC COM DC COM J203 NAIN MOTOR PL1 1 MOT 3 FG SERVO CONTROL J203 MAIN MOTOR FAIL H 3 3VDC J534 BLU 8 I F PWB PL9 1 MCU PWB PL13 1 3 3VDC P J410 B8 106 4 1B 4 1A MAIN MOTOR DRIVE CONTROL 1 of 2 Thi...

Page 364: ...ON MIRROR DRIVE A11 A12 A13 A17 B4 B18 B20 DC COM DC COM DC COM 5VDC INTERLOCK GRY GRY YEL YEL YEL VIO J401 YEL VIDEO DATA Y VIDEO DATA Y LASER DIODE Y POWER SIGNAL DC300 006 030 LASER DIODE Y ENABLE...

Page 365: ...YEL TD 1 TD 1 1 2 ORN VIO 24VDC DC COM ROS ASSY PL3 1 1 ROS MOTOR MOT FG J518 DC330 006 160 ROS MOTOR READY L 3 3VDC DC COM VIO MCU PWB PL13 1 3 3VDC J402 ROS MOTOR READY SIGNAL POLYGON MIRROR DRIVE 6...

Page 366: ...OS SHUTTER MOTOR ON 24V CLOCK DOUBLE PLUG 1 2 3 4 5 5 4 3 2 1 ZONE C5 MOT 24VDC INTERLOCK 6 10 ROS SHUTTER CONTROL For preventing ROS seal glass from contamination the shutter is closed while ROS not...

Page 367: ...8 J403 P608 13 A13 A16 A3 A6 16 8 5 3 6 18 15 DOUBLE PLUG MOB SENSOR 1 A DETECTED L 5VDC MOB SENSOR 1 B DETECTED L 5VDC MOB SENSOR 2 A DETECTED L 5VDC MOB SENSOR 2 B DETECTED L 5VDC MOB SENSOR 2 DETEC...

Page 368: ...SEMSOR SENSED SIGNAL YEL J536 B9 58 P J410 I F PWB PL9 1 MCU PWB PL13 1 3 3VDC PAPER SIZE SENSOR S4 S3 S2 S1 TRAY 2 PAPER SIZE SENSOR SENSED SIGNAL 7 10A 1 Paper size is sensed according to voltage co...

Page 369: ...ble shows paper sizes correspond to their respective Switch ON OFF patterns and voltages 2 Virtual Line NOTES 7750 278 7 1 TRAY 3 PAPER SIZE SENSING 1 5VDC 5VDC TRAY MODULE PWB PL15 9 16 15 2 8 J546 T...

Page 370: ...SIZE SENSING TRAY 4 PAPER SIZE SENSOR SENSED SIGNAL J820 J548 YEL 11 5VDC TRAY MODULE PWB PL16 15 PAPER SIZE SENSOR S4 S3 S2 S1 1 2 TRAY 4 PAPER SIZE SENSOR SENSED SIGNAL 7 10A 1 Paper size is sensed...

Page 371: ...5 PAPER SIZE SENSOR SENSED SIGNAL J824 J548 YEL 5 5VDC TRAY MODULE PWB PL16 15 PAPER SIZE SENSOR S4 S3 S2 S1 1 2 TRAY 4 PAPER SIZE SENSOR SENSED SIGNAL 7 10A 1 Paper size is sensed according to volta...

Page 372: ...0 007 105 S3 DC330 007 106 S4 DC330 007 107 Voltage J546 8 No Tray OFF OFF OFF OFF 4 66 A3 S OFF OFF OFF ON 4 33 11 x 17 OFF OFF ON OFF 4 01 8 5 x 13 S OFF OFF ON ON 3 69 OFF ON OFF OFF 3 38 B5 L 16K...

Page 373: ...008 001 FEED DC330 008 002 LIFT UP TRAY 2 FEED LIFT UP MOTOR ON 24V CLOCK DOUBLE PLUG 7 6 8 5 9 4 10 3 11 2 12 1 1 2 3 4 5 6 ORN ORN MOT J617 J205 TRAY 2 FEED LIFT UP MOTOR PL2 4 I F PWB PL9 1 DC COM...

Page 374: ...CLOCK DC330 008 003 FEED DC330 008 004 LIFT UP TRAY 3 FEED LIFT UP MOTOR ON 24V CLOCK DOUBLE PLUG 7 6 8 5 9 4 10 3 11 2 12 1 1 2 3 4 5 6 ORN ORN MOT J670 J827 TRAY 2 FEED LIFT UP MOTOR PL15 3 16 7 TR...

Page 375: ...8 005 FEED DC330 008 006 LIFT UP TRAY 4 FEED LIFT UP MOTOR ON 24V CLOCK DOUBLE PLUG 7 6 8 5 9 4 10 3 11 2 12 1 1 2 3 4 5 6 ORN ORN MOT J672 J828 TRAY 4 FEED LIFT UP MOTOR PL15 5 16 9 TRAY MODULE PWB P...

Page 376: ...FEED LIFT UP MOTOR ON 24V CLOCK DC330 008 007 FEED DC330 008 008 LIFT UP TRAY 5 FEED LIFT UP MOTOR ON 24V CLOCK DOUBLE PLUG 7 6 8 5 9 4 10 3 11 2 12 1 1 2 3 4 5 6 ORN ORN MOT J674 J829 TRAY 5 FEED LIF...

Page 377: ...2 3 1 1 GRY GRY VIO VIO PAPER SIZE SENSOR PL2 15 YEL YEL J103 OPERATOR LOADED PAPER 7 9 TRAY 5 PAPER STACKING YEL YEL I F PWB PL9 1 MCU PWB PL13 1 B4 B9 34 P J410 37 3 3VDC 3 3VDC 1 2 Paper Size Senso...

Page 378: ...03 TRAY 5 FEED SOLENOID ON L 24VDC P610 YEL YEL DOUBLE PLUG DOUBLE PLUG J610 ORN BLU P219 J219 TRAY 5 FEED SOLENOID PL2 14 A A TRAY 5 FEED DRIVE TRAY 5 STACKED PAPER TRAY 1 FEED DRIVE TRAY 1 STACKED P...

Page 379: ...6 55 I F PWB PL9 1 MCU PWB PL13 1 5VDC P J410 1 TRAY 1 FEED OUT SENSOR SENSED SIGNAL TRAY FED PAPER TAKE AWAY CLUTCH PL1 2 P221 DC330 008 038 400ms TAKE AWAY CLUTCH ON L 24VDC BLU BLU J532 J221 24VDC...

Page 380: ...DRIVE TRAY 2 FED PAPER TRAY3 FED PAPER TRAY34 FED PAPER TAKE AWAY ROLL 3 DRIVE TAKE AWAY ROLL 4 DRIVE TRAY MODULE PWB PL16 15 DC COM DC COM DC COM 5VDC 5VDC 5VDC 8 3 TRAY MODULE PAPER TRANSPORTATION...

Page 381: ...1 ON 24V CLOCK 1 YEL YEL YEL TAKE AWAY MOTOR 1 ON 24V CLOCK 1 YEL 24VDC TM INTLK 24VDC TM INTLK VIO VIO TAKE AWAY MOTOR 2 ON 24V CLOCK 1 TAKE AWAY MOTOR 2 ON 24V CLOCK 1 TAKE AWAY MOTOR 2 ON 24V CLOCK...

Page 382: ...NSOR SENSED L 3 3VDC J407 DC330 008 110 OHP SENSOR R SENSED L 5VDC MCU PWB PL13 1 3 3VDC 5VDC REGI SENSOR SENSED SIGNAL OHP SENSOR R SENSED SIGNAL REGISTRATED PAPER MCU PWB PL13 1 DC COM 24VDC B7 B8 R...

Page 383: ...4 5 6 7 8 SERVO CONTROL J210 J535 BLU B1 I F PWB PL9 1 MCU PWB PL13 1 3 3VDC 18 P J410 4 DRUM MOTOR Y M C FAIL SIGNAL 9 31A 9 5 9 6 9 7 NOTES Drives at high speed for standard paper and at half speed...

Page 384: ...PEED L 5VDC BLU BLU BLU BLU BLU BLU GRY VIO ORN VIO DRUM MOTOR K PL1 1 SERVO CONTROL DC330 004 102 DRUM MOTOR K FAIL H 3 3VDC J534 9 5 6 7 8 4 3 1 2 DRUM K DRIVE 9 2 DRUM DRIVE CONTROL K NOTES Drives...

Page 385: ...53 DRUM C DATA DRUM K 3 3VDC CLOCK DRUM C 3 3VDC CLOCK DC330 009 154 DRUM K DATA 1 1 1 2 3 DOUBLE PLUG J622 J153 1 10 9 8 7 6 5 4 3 2 3 4 5 6 7 8 J152 DRUM K DATA SIGNAL 9 31B 3 DRUM C DATA SIGNAL 9 3...

Page 386: ...VOLTAGE 1 8 8 9 10 11 J581 BCR Y POWER ZONE D4 CLEANER Y DRIVE LATENT IMAGE Y LATENT ADC PATCH Y LATENT REGICON PATCH Y 9 5 CHARGING AND EXPOSURE Y ZONE H2 BCR Y POWER HVPS Control PWB performs BCR on...

Page 387: ...0 009 014 5s DEVE MOTOR ON L 5VDC DC 330 009 014 5s DEVE MOTOR HIGH SPEED L 5VDC 1 2 4 5 6 7 3 MOT FG 9 10 9 11 9 12 A B C DEVE Y DRIVE DEVE M DRIVE DEVE C DRIVE Drives at high speed for standard pape...

Page 388: ...REMOTE 1 ANALOG GND 5VDC REF AC BIAS VOLTAGE MONITOR DEVE BIAS Y M AC VOLTAGE MONITOR J580 DISPENSED YELLOW TONER LATENT IMAGE Y LATENT ADC PATCH Y LATENT REGICON PATCH Y DEVE BIAS Y 1 DC140 009 100...

Page 389: ...DC REF AC BIAS VOLTAGE MONITOR DEVE BIAS C AK AC VOLTAGE MONITOR J580 DISPENSED BLACK TONER LATENT IMAGE K LATENT ADC PATCH K LATENT REGICON PATCH K DEVE BIAS K DEVE K DRIVE 7 DC140 009 103 ATC SENSOR...

Page 390: ...4VDC DC330 009 013 5s DEVE K CLUTCH ON L 24VDC J532 J234 YEL YEL 1 2 2 1 P234 DEVE K CLUTCH PL1 2 DOUBLE PLUG DEVE BIAS K DEVE K DRIVE DISPENSED BLACK TONER LATENT IMAGE K LATENT ADC PATCH K LATENT RE...

Page 391: ...DETECT L 3 3VDC DC330 009 103 NEW CARTRIDGE DETECT SWITCH C NEW DETECT L 3 3VDC DC330 009 104 NEW CARTRIDGE DETECT SWITCH K NEW DETECT L 3 3VDC 3 3VDC 3 3VDC 3 3VDC 3 3VDC 9 31D NEW CARTRIDGE DETECT S...

Page 392: ...TOR K ON L 24VDC 2 1 2 1 9 15 TONER DISPENSE CONTROL DISPENSED BLACK TONER DISPENSED CYAN TONER DISPENSED MAGENTA TONER DISPENSED YELLOW TONER 9 13 9 12 9 11 9 10 This model has no Low Toner Sensor Lo...

Page 393: ...OR PL13 1 TRANSFERRED ADC PATCH Y TO IBT TRANSFERRED ADC PATCH M TO IBT TRANSFERRED ADC PATCH C TO IBT TRANSFERRED ADC PATCH K TO IBT I F PWB PL9 1 5VDC 5VDC DC COM DC COM B4 B2 J536 P619 YEL YEL DOUB...

Page 394: ...4VDC CLOCK DC330 004 002 IBT MOTOR ON 24VDC CLOCK DC330 004 002 IBT MOTOR ON 24VDC CLOCK J551 IBT MOTOR PL1 1 MOT 9 17 IBT DRIVE CONTROL IBT CLEANER DRIVE 9 28 Drives at high speed for standard paper...

Page 395: ...CONTACT DC330 009 055 RETRACT 1ST BTR MOTOR ON 24VDC CLOCK 1 1 1 1 P639 DOUBLE PLUG DOUBLE PLUG DOUBLE PLUG 1 2 3 4 5 6 12 1 7 8 9 10 11 12 J639 P605 BLU BLU BLU BLU BLU BLU BLU GRY VIO ORN BLU BLU B...

Page 396: ...A3 A7 A5 B5 B7 B3 J605 J121 VIO GRY GRY BLU DC330 004 014 IBT SENSOR POWER ON H 5VDC DC330 004 100 IBT HOME SENSOR SENSED H 5VDC J121 J119 IBT EDGE SENSOR PL5 4 YEL ZONE D6 AMP VIO J119 YEL ZONE D6 DC...

Page 397: ...9 5 10 11 12 13 ANALOG GND 1ST BTR Y MONITOR P J570 HVPS CONTROL PWB PL9 1 HVPS T5 PL9 1 2 18 18 15 16 17 DC140 009 051 1ST BTR Y REMOTE J501 J575 J575 YEL HVPS T6 PL9 1 1ST BTR Y POWER CONTROL 1ST B...

Page 398: ...2ND BTR RETRACT MOTOR ON 24VDC CLOCK DC330 009 051 CONTACT DC330 009 052 RETRACT 2ND BTR RETRACT MOTOR ON 24VDC CLOCK P612 YEL YEL YEL YEL YEL YEL DOUBLE PLUG DOUBLE PLUG J612 P216 BLU BLU ORN ORN BL...

Page 399: ...MOTE P J571 HVPS T5 PL9 1 2ND BTR POWER CONTROL 10 11 HVPS CONTROL PWB PL9 1 J574 BLU 3 5VDC 2ND BTR POWER ZONE C3 UNFUSED COPY CONTAMINATED IBT 2nd BTR Bias switching For the image area on IBT 2nd BT...

Page 400: ...PWB PL9 1 P J571 12 DC330 009 053 DTS REMOTE DTS POWER CONTROL 5VDC YEL YEL DC COM P612 4 6 12 12 DOUBLE PLUG DOUBLE PLUG J612 J111 GRY VIO POB SENSOR PL2 9 1 3 2 J111 YEL J612 11 5 P612 DC330 009 201...

Page 401: ...E LAMP Y ON L 24VDC J223 YEL YEL DOUBLE PLUG P223 1 1 2 2 ERASE LAMP Y PL4 2 24VDC J403 DC330 009 045 ERASE LAMP M ON L 24VDC J224 YEL YEL DOUBLE PLUG P224 1 1 2 2 ERASE LAMP M PL4 2 9 5 9 20 CLEANER...

Page 402: ...UBLE PLUG 3 1 3 1 P233 J233 A A 1 MCU PWB PL13 1 DC COM DC COM DC COM YEL BLU 24VDC INTLK BLU YEL 5VDC 5VDC 91 B15 B17 P J410 I F PWB PL9 1 J407 24VDC INTLK A17 A16 J532 DC330 009 034 AGITATOR MOTOR O...

Page 403: ...LOCKED H 3 3VDC YEL J552 EXHAUST AIR 3 I F PWB PL9 1 P J410 63 3 3VDC MCU PWB PL13 1 9 30 REAR FAN CONTROL 7750 321 Rear Fan starts low speed rotation at power on and keeps it with M C on standby Rea...

Page 404: ...EAT STRIPPED UNFUSED COPY I F PWB PL9 1 B14 J533 DC COM DC COM P612 J612 YEL DOUBLE PLUG DOUBLE PLUG DOUBLE PLUG DOUBLE PLUG VIO P113 1 2 1 2 8 8 7 9 J113 J113 P113 FUSER EXIT SWITCH PL2 8 MAGNET J612...

Page 405: ...s INVERTER REVERSE CLUTCH ON L 24VDC BLU BLU BLU BLU BLU ORN BLU ORN BLU ORN BLU ORN DOUBLE PLUG DOUBLE PLUG P613 6 8 9 10 11 5 4 3 J613 P633 J633 DRAWER CONNECTOR B6 A6 A5 A4 A3 B5 B4 B3 P217 J217 P2...

Page 406: ...2 P613 DOUBLE PLUG 10 9 8 7 7 6 5 4 J613 24VDC 24VDC BLU ORN BLU ORN BLU ORN BLU ORN P633 DRAWER CONNECTOR A4 B4 B3 B2 B1 A3 A2 A1 J633 P251 J251 DUPLEX GATE SOLENOID PL11 2 P215 J215 EXIT GATE SOLEN...

Page 407: ...PEED L 5VDC P640 YEL YEL YEL DUPLEX PWB PL12 2 5VDC 5VDC 5VDC 7 8 9 1 2 3 4 5 6 J539 DUPLEX MOTOR PL12 2 DUPLEX MOTOR ON 24V CLOCK DUPLEX MOTOR ON 24V CLOCK DUPLEX MOTOR ON 24V CLOCK DUPLEX MOTOR ON 2...

Page 408: ...135 J135 DC COM DC COM VIO VIO GRY 5VDC J136 J136 DUPLEX COVER INTERLOCK SWITCH PL12 2 DUPLEX PWB PL12 2 3 5 1 2 1 YEL YEL J540 4 2 6 5 J538 J626 P626 YEL YEL YEL YEL YEL YEL J640 P640 DC330 008 105 D...

Page 409: ...135 J135 DC COM DC COM VIO VIO GRY 5VDC J136 J136 DUPLEX COVER INTERLOCK SWITCH PL12 2 DUPLEX PWB PL12 2 3 5 1 2 1 YEL YEL J540 4 2 6 5 J538 J626 P626 YEL YEL YEL YEL YEL YEL J640 P640 DC330 008 105 D...

Page 410: ...Phaser 7750 Printer 10 85 Phaser 7750 Wiring Schematic 1 of 6...

Page 411: ...10 86 Phaser 7750 Printer Phaser 7750 Wiring Schematic 2 of 6...

Page 412: ...Phaser 7750 Printer 10 87 Phaser 7750 Wiring Schematic 3 of 6...

Page 413: ...10 88 Phaser 7750 Printer Phaser 7750 Wiring Schematic 4 of 6...

Page 414: ...Phaser 7750 Printer 10 89 Phaser 7750 Wiring Schematic 5 of 6...

Page 415: ...10 90 Phaser 7750 Printer Phaser 7750 Wiring Schematic 6 of 6...

Page 416: ......

Page 417: ...11 Chapter Phaser 7750 Finisher In this chapter Phaser 7750 Finisher Finisher Specifications Finisher Assemblies Finisher Disassembly Finisher Service Parts List...

Page 418: ...inisher is a customer installed option that contains a horizontal transport stapler compiler and stacker The finisher docks with the print engine and finisher stand The finisher s built in power suppl...

Page 419: ...ch area then directly into the horizontal transport The horizontal transport then delivers the paper to the finisher where stapling offsetting jogging and stacking occur Power requirements The printer...

Page 420: ...apacity 1000 non stapled sheets 20 lb paper letter A4 or smaller 500 unstapled sheets 20 lb paper over size Letter A4 300 unstapled sheets Mix Stack loading large on small 50 stapled sets Staple Cartr...

Page 421: ...11 5 Finisher Assemblies S7700 445 Gate Unit Horizontal Transport Staple Finisher Stacker Stand...

Page 422: ...Printer Service Manual Internal Assemblies of the Finisher Exit Assembly Main Motor Finisher Control Board Decurler Compiler Tray Stacker Motor Assembly Staple Assembly Track Cam Bracket Assembly Stap...

Page 423: ...1 7 Horizontal Transport Sensor Interlock and Switch Locations IOT Face Down Tray Full Sensor H Transport Entrance Sensor Gate In Solenoid H Transport Interlock Sensor H Transport Exit Sensor S7700 44...

Page 424: ...inter Service Manual Finisher Sensor Interlock and Switch Locator Map S7700 449 Rear Eject Clamp Home Sensor Stack Height Sensor Decurler Cam Home Sensor Docking Interlock Sensor Set Clamp Home Sensor...

Page 425: ...11 9 Finisher Sensor Interlock and Switch Locator Map...

Page 426: ...mblies of the Phaser 7750 light finisher When replacing sensors actuators interlocks and or switches Refer to the appropriate locator map to identify the sensor Remove the necessary covers Press down...

Page 427: ...11 11 Horizontal Transport Assembly 1 Unplug the finisher from the printer 2 Lift the two hooks securing the horizontal transport assembly to the finisher 3 Remove the horizontal transport assembly...

Page 428: ...m the horizontal transport front cover and remove the cover 4 Remove the hinge screw and remove the top open cover 5 Remove 2 screws securing the horizontal transport rear cover 6 Remove the horizonta...

Page 429: ...ly 1 Remove the horizontal transport assembly see page 11 11 2 Remove the front cover see page 11 12 3 Remove 2 screws securing the rear cover and remove 4 Remove the gate in solenoid assembly 5 Remov...

Page 430: ...sport in and out 3 Remove the bearings from the horizontal transport in and out shafts 4 Remove one end of each horizontal transport belt roller support 5 Remove the belts Replacement Note When reinst...

Page 431: ...y up on the locking tab while pressing firmly towards the entrance end of the transport 4 Disconnect the wiring harness connector 5 Press down on the two locking tabs located at the top of the sensor...

Page 432: ...ser 7750 Printer Service Manual Gate In Solenoid Assembly 1 Remove the Rear Cover 2 Disconnect the ground wire from the solenoid housing 3 Remove the 2 screws securing the Gate In Solenoid Assembly an...

Page 433: ...port Assembly see page 11 11 2 Remove 1 screw from the Left Panel and remove 3 Remove 5 screws from the Rear Cover 4 Clear the gear at the top of the Rear Cover and remove the cover S7700 396 Front Co...

Page 434: ...left portion of the top cover assembly 10 Open the top door and remove the front and back screws 11 Pop off both straps tilt the cover up and remove Note When installing the rear cover be sure that t...

Page 435: ...assembly see page 11 11 2 Remove the top cover see page 11 17 3 Remove 1 screw from the Stack Height Sensor bracket 4 Press down on the two locking tabs located at the top of the sensor press up on th...

Page 436: ...ws securing the stacker paper sensor assembly to the finisher 3 Remove 2 screws from the bottom of the assembly 4 Remove 1 screw on the sensor bracket 5 Press down on the two locking tabs located at t...

Page 437: ...ctuator retainer and remove 4 Remove the clutch collar and clutch 5 Remove the gear Note When replacing after installing the clutch collar you need to depress the clutch solenoid and rotate the set cl...

Page 438: ...see page 11 17 2 Remove sack paper sensor assembly see page 11 20 3 Undo the intermediate connector 4 Remove the right cover 5 Remove the set camp clutch and gear see page 11 21 6 Remove both KL clip...

Page 439: ...s and loosen the two bottom screws 3 Remove finisher control board shield 4 Undo all the connectors 5 Remove 2 screws on the left 6 Loosen 1 screw on the right 7 Undo one connector 8 Loosen the outer...

Page 440: ...r control board cover 11 Remove the 4 wiring connectors 12 Remove 6 screws from the control board remove Note When reinstalling the cover do not insert screws into the second or fourth holes at the bo...

Page 441: ...the finisher control board bracket and shield see page 11 23 2 Remove 1 connector 3 Remove 3 screws securing the stacker motor assembly and remove Note When reinstalling ensure the gear is engaged and...

Page 442: ...et assembly see page 11 28 3 Remove the staple unit see page 11 29 4 Remove the e clips from both ends of the shaft 5 Remove the gear and bushing from the front end of the shaft 6 Remove the bushing f...

Page 443: ...11 27 Paper Transport Motor Motor Assembly Main 1 Remove the Rear Cover see page 11 17 2 Remove 4 screws 3 Undo the connector and lift the motor up and then out to free the belt...

Page 444: ...wiring harness from the set clamp home sensor 5 Remove the wiring harness from the bracket 6 Disconnect the wiring harness from the eject motor 7 Remove 4 screws from the bracket and remove the cam br...

Page 445: ...ors to the staple unit 3 Remove 2 screws note one screw has a ground wire 4 Pull the staple unit assembly down tilt up and pull out towards the front Staple Motor 1 Remove the staple unit assembly 2 R...

Page 446: ...isconnect P848 4 Remove the set clamp solenoid connector 5 Remove the staple unit see page 11 29 6 Remove 2 screws from the bottom of the tamper assembly front and rear 7 Push the wiring harness into...

Page 447: ...C J844 1 4 5 2 1 YEL YEL J890 DC330 12 301 TOP COVER INTERLOCK SWITCH CLOSED L 5VDC DC330 12 300 FRONT DOOR INTERLOCK SWITCH CLOSED L 5VDC J851 FINISHER PWB PL17 13 5VDC 5VDC TOP COVER INTERLOCK SWITC...

Page 448: ...L YEL YEL YEL YEL J403 MCU TO FINISHER COMMUNICATION LINE RETURN DC330 12 100 REGI CLUTCH ON SIGNAL NOT USED DC COM DC COM DC COM P800A J800A DC COM 3 4 5 7 10 9 8 5VDC FINISHER PWB PL17 13 DC COM 1 2...

Page 449: ...LK ON 24VDC DC330 12 001 FINISHER DRIVE MOTOR ON J879 TRANSPORT MOTOR BRAKE INTLK ON 24VDC INTLK ON 24VDC DC COM DC COM FINISHER DRIVE MOTOR PL17 7 1 6 3 2 5 4 MOT FINISHER DRIVE J859A J859B VIO GRY V...

Page 450: ...3 3 1 J853 YEL YEL J858B J858A 2 2 P861 14 7 12 SHORTING PLUG J854 J859B YEL YEL 5 2 J859A DC330 12 103 H TRA ENTRANCE SENSOR PAPER SENSED H 5VDC DC330 12 104 H TRA EXIT SENSOR PAPER SENSED H 5VDC DC...

Page 451: ...Y VIO GRY VIO 1 3 6 4 DOUBLE PLUG J870A J867 J867 YEL YEL J870A J870B DOUBLE PLUG 5 2 DC330 12 101 COMPILER ENTRANCE SENSOR PAPER SENSED H 5VDC J850 B8 5VDC FINISHER PWB PL17 13 COMPILER ENTRANCE SENS...

Page 452: ...MOTOR ON 24 CLOCK DOUBLE PLUG J848 J878B J878A REAR TAMPER MOTOR PL17 10 MOT REAR TAMPER DRIVE ZONE C4 DECURLED PAPER COMPILE PADDLE DRIVE FRONT TAMPER HOME SENSOR ZONE E3 A9 A7 A6 A4 A3 A1 5VDC 5VDC...

Page 453: ...080 TO 083 STAPLE MOVE MOTOR ON 24VDC CLOCK INTLK ON 24VDC INTLK ON 24VDC YEL YEL YEL YEL ORN ORN MOT J865 DC330 12 224 STAPLE MOVE SENSOR BLOCKED H 5VDC DC330 12 225 STAPLE FRONT CORNER SENSOR CORNER...

Page 454: ...24VDC OPEN L 24VDC DC330 12 021 OPEN STAPLE MOTOR CLOSE H 24VDC OPEN L 24VDC 1 3 3 3 1 GND GRN J887 STAPLE HEAD ASSY PL17 9 STAPLE MOTOR MOT 1 2 3 4 5 1 COMPILED SET STAPLE MOTOR DC330 12 207 STAPLE...

Page 455: ...6 J849 J882 VIO VIO GRY GRY J883 J882 STAPLED SET EJECT ROLL DRIVE ZONE F3 EJECT CLAMP HOME SENSOR SET CLAMP HOME SENSOR SET CLAMP SOLENOID EJECT ROLL DRIVE ZONE E2 DC330 12 211 SET CLAMP HOME SENSOR...

Page 456: ...STACK PAPER SENSOR PAPER SENSED H 5VDC J871B B5 B2 5VDC 5VDC FINISHER PWB PL17 13 STACK HEIGHT SENSOR SENSED SIGNAL STACK PAPER SENSOR SENSED SIGNAL STACK HEIGHT SENSOR STACK PAPER SENSOR STACKER TRA...

Page 457: ...B 12 10B STACKER TRAY CONTROL 2 OF 2 UPPER LIMIT SENSOR STACK A SENSOR STACK B SENSOR A5 LEF B5 LEF A4 LEF 8 5X11 LEF 16K LEF Post Card SEF B6 SEF A6 SEF A5SEF B5 SEF A4 SEF B4 SEF A3 SEF 5 5X8 5 SEF...

Page 458: ...11 42 Phaser 7750 Printer Service Manual Finisher Service Parts List PL 17 1 Finisher...

Page 459: ...116 1292 00 1 Gate Cover 2 116 1280 01 1 H Transport Assembly 3 Staple Finisher 4 116 1821 00 Thumbscrew 5 Rack Assembly 6 116 1244 00 1 Right Cover 7 116 1278 00 1 Stacker Tray 8 116 1279 00 1 Screw...

Page 460: ...ervice Manual PL 17 2 Gate Assembly Gate Assemblies PL 17 2 No Part Number Qty Description 1 116 1292 00 Gate Cover 2 Bearing 3 116 1293 00 Gate Assembly items 4 14 4 In Gate 5 In Gate Lever 6 116 129...

Page 461: ...No Part Number Qty Description 1 116 1290 00 H Transport Cover Assembly 3 116 1291 00 Magnet 4 Screw 6 116 1246 00 Roll 9 116 1289 00 Entrance Upper Cover Assembly 13 116 1821 00 Thumbscrew 14 116 12...

Page 462: ...ort Assembly 2 of 2 Horizontal Transport Assembly 2 of 2 PL 17 4 No Part Number Qty Description 1 H Transport Roll in 2 H Transport Roll out 3 116 1284 00 1 H Transport Belt 4 Roll 5 Support 6 1 Beari...

Page 463: ...em 12 15 Link 16 Cover 17 Ground Wire 18 Wire Harness 19 Wire Harness 20 Bearing 21 116 1281 00 Gear 37T 22 116 1282 00 Gear 30T 23 116 1283 00 Gear 26T 24 116 1234 00 Interlock Sensor 25 Bracket 26 1...

Page 464: ...11 48 Phaser 7750 Printer Service Manual PL 17 5 Covers s7750 408...

Page 465: ...L 17 5 No Part Number Qty Description 1 116 1238 00 Front Cover 2 116 1239 00 Rear Cover 3 116 1236 00 Top Cover 4 116 1237 00 Left Cover 5 116 1245 00 Front Cover Door 6 Left Panel 7 Hinge N S 8 116...

Page 466: ...11 50 Phaser 7750 Printer Service Manual PL 17 6 Top Cover and Eject Roll s7750 409...

Page 467: ...0 116 1823 00 1 Eject Chute 11 116 1272 00 1 Stack Height Sensor Assembly 12 1 Actuator 13 Bracket 14 116 1253 00 1 Stack Height Sensor 15 Shaft 16 Link 17 116 1264 00 1 Actuator 18 116 1258 00 Clutch...

Page 468: ...11 52 Phaser 7750 Printer Service Manual PL 17 7 Paper Transport 1 of 2 s7750 410...

Page 469: ...Shaft 5 Bearing 6 116 1250 00 1 Arm 7 116 1302 00 1 Decurler Roll 8 116 1847 00 1 Gear 40Z 20T part of a kit 9 116 1847 00 1 Gear 40Z part of a kit 10 116 1847 00 1 Gear 18Z 21T part of a kit 11 Shaf...

Page 470: ...11 54 Phaser 7750 Printer Service Manual PL 17 8 Paper Transport 2 of 2 s7750 411...

Page 471: ...1 Gear 15Z part of a kit 4 116 1271 00 1 Belt 5 116 1847 00 1 Gear 30Z part of a kit 6 Collar 7 116 1847 00 1 Gear Pully part of a kit 8 Eject Motor 9 116 1847 00 1 Cam Gear part of a kit 10 116 1847...

Page 472: ...11 56 Phaser 7750 Printer Service Manual PL 17 9 Staple Unit Assembly s7750 412...

Page 473: ...ssembly Item 2 6 2 Bracket Assembly 3 116 1256 00 1 Staple Move Motor 4 Gear 5 Staple Sensor 6 Roll 7 116 1259 00 1 Staple Front Corner Sensor 8 Plate 9 116 1254 00 1 Rail REP 17 9 1 10 116 1257 00 1...

Page 474: ...11 58 Phaser 7750 Printer Service Manual PL 17 10 Compiler Tray Assembly s7750 413...

Page 475: ...Assembly Item 2 15 2 116 1252 00 1 Front Rear Tamper Motor Assembly 3 Plate 4 116 1253 00 1 Front Rear Tamper Home Sensor 5 Rack 6 Actuator 7 Tamper 8 Finger 9 Spring 10 116 1234 00 1 Compiler Paper...

Page 476: ...11 60 Phaser 7750 Printer Service Manual PL 17 11 Stacker Elevator Assembly s7750 414...

Page 477: ...earing 5 116 1274 00 1 Gear Rear 6 Actuator 7 116 1275 00 1 Gear Front 8 Stacker Tray Bracket Assembly 9 116 1273 00 1 Rack 10 Tray Guide 11 116 1270 00 1 Paper Stack Assembly Item 12 16 12 116 1253 0...

Page 478: ...11 62 Phaser 7750 Printer Service Manual PL 17 12 Exit Assembly s7750 415...

Page 479: ...ft 4 Collar 5 Gear 32Z 18T 6 Bearing 7 116 1304 00 1 Paddle Gear Shaft REP 17 12 1 8 Paddle Bearing 9 Lower Exit Chute 10 116 1302 00 1 Pinch Roll Exit 1 11 Pinch Roll Exit 2 12 Pinch Roll Exit 3 13 U...

Page 480: ...11 64 Phaser 7750 Printer Service Manual PL 17 13 Electrical Components s7750 416...

Page 481: ...iption 1 Board Cover 2 116 1235 00 1 Finisher Board 3 116 1314 00 1 ROM 4 PWB Bracket 5 116 1824 00 DC Harness 6 116 1825 00 Cable 7 116 1233 00 1 Top Cover Front Door Interlock Switch 8 116 1253 00 1...

Page 482: ...11 66 Phaser 7750 Printer Service Manual PL 17 14 Finisher Rack Stand s7750 417...

Page 483: ...Number Qty Description 1 116 1315 00 Front Rack 2 1 Front Cover 3 1 Knob Screw 4 Screw 5 Bracket 6 Stop 7 1 Spring Plate 8 1 Rail 9 Foot 10 Front Rack 11 116 1316 00 Rear Rack Assembly 12 Rear Cover 1...

Page 484: ...11 68 Phaser 7750 Printer Service Manual...

Page 485: ...A Appendix Appendix Contents Menu Map Service Diagnostic Menu Map Service Usage Profile Status Code Definitions Table Chain Link Code Definitions Paper Weight Equivalence Table...

Page 486: ...Pages Model Printer Name Print Server IP Address Serial Activation Date Supplies Usage Page Cyan Toner Life Magenta Toner Life Yellow Toner Life Black Toner Life Imaging Unit 1 Life Imaging Unit 2 Lif...

Page 487: ...untime Log PostScript Error Info Print Quality Mode TekColor Correction Image Smoothing Reset PostScript Setup Calibrate for Paper Calibrate Colors Calibrate Margins Font Number Pitch Point Size Symbo...

Page 488: ...or Steering Motor Imaging Unit Motors Accumulator Belt Motor Motor Test cont d 1st BTR Motor 2nd BTR Motor Duplex Motor Paper Feed Motors Paper Lift Motors Offset Motor Developer Motors Dispenser Moto...

Page 489: ...ocessing Data 9 Black toner is getting low 29 Receiving Data 10 Imaging Unit 1 is near end of life 30 Engine is printing 11 Imaging Unit 2 is near end of life 31 Progress printing page n 12 Imaging Un...

Page 490: ...y Full 77 No heavy paper in MPT 53 No paper standard tray 4 78 No color laser labels in MPT 54 No paper tray 3 printing from 3 79 No envelopes in MPT 55 No paper tray 2 printing from 2 80 No thin cove...

Page 491: ...t tray 1 103 Imaging Unit 2 at end of life 128 Jam at tray 2 104 Imaging Unit 3 at end of life 129 Jam at tray 3 105 Imaging Unit 4 at end of life 130 Jam at tray 4 106 Accumulator belt is at end of l...

Page 492: ...ze Mismatch Load Executive 151 Tray 4 Needs Heavy 176 Size Mismatch Load Tabloid 152 Tray 2 HC Needs Paper 177 Size Mismatch Load TabloidEx 153 Tray 2 HC Needs Heavy 178 Size Mismatch Load 8x10 154 Tr...

Page 493: ...221 Drum Motor Fail 200 Envelope Size Mismatch Load B5 222 Unexpected Accumulator Home Sensor Fail 201 Envelope Size Mismatch Load B6 223 Accumulator Drive Logic Fail 202 Envelope Size Mismatch Load C...

Page 494: ...Magenta ATC Fail 266 Finisher Error 125 242 Cyan ATC Fail 267 Number of opcodes 243 Black ATC Fail 244 Engine Logic Board Fail 245 Engine Comm Fail 246 Engine RAM ROM Fail 247 Engine NVRAM Fail 248 C...

Page 495: ...SOR BROKEN 3TM 07 273 TRAY 5 PAPER SIZE SENSOR BROKEN 3TM 07 274 MPT PAPER SIZE SENSOR BROKEN 07 276 TRAY 4 PAPER SIZE SENSOR BROKEN TTM 07 277 TRAY 5 PAPER SIZE SENSOR BROKEN TTM 07 930 TRAY 2 PAPER...

Page 496: ...7 43 24 29 35 39 64 20 50b 28 34 42 46 75 21 54 30 36 44 49 80 24 60b 33 41 50 55 90 27 68 37 45 55 61 100 28 70b 39 49 58 65 105 29 74 41 50 61 68 110 32 80b 44 55 67 74 120 36 90 50 62 75 83 135 0 1...

Page 497: ...9 home position took too long code 30 3 19 unexpected belt edge sensor failure code 32 3 22 unexpected home sensor signal code 33 3 24 Accumulator Belt Drive disassembly 8 50 Accumulator Belt Motor di...

Page 498: ...diagnostics 4 12 clearance 1 9 Clutch Tests diagnostics 4 11 coarse initialization 6 12 Coarse RegiCon initialization diagnostics 4 12 coarse skew 6 3 Color Registration Control wiring diagram 10 43...

Page 499: ...re code 80 3 39 Engine Control Interface Board disassembly 8 43 Engine NVRAM reset 6 20 engine ROM version diagnostics 4 3 environmental specifications 1 13 error messages index table 3 10 Exit Gate S...

Page 500: ...6 Fuser Fan disassembly 8 32 Fuser Fan Motor diagnostic test 4 10 Fuser jams troubleshooting 4 22 Fuser Present Sensor diagnostic test 4 6 Fuser Temperature Sensor diagnostic test 4 5 fusing 2 3 H Ha...

Page 501: ...disassembly 8 44 LTA Rear Cover disassembly 8 57 LTA Right Side Door disassembly 8 57 LTA HCF Cover disassembly 8 58 LVPS Control wiring diagram 10 33 M Macintosh troubleshooting 4 23 Main Drive disa...

Page 502: ...Power Interlock Switching wiring diagram 10 37 Power Supply system theory of 2 13 primary transfer 2 2 Print Cartridge Motor diagnostic test 4 9 print process summary of 2 2 print quality overview 5 2...

Page 503: ...disassembly 8 16 Solenoid Tests diagnostic test 4 11 Stack Full Sensor diagnostic test 4 6 stack height sensing 2 6 Startup 3 7 Steering Drive disassembly 8 29 Steering Motor diagnostic test 4 9 Store...

Page 504: ...ensing wiring diagram 10 47 Tray 4 Paper Stacking wiring diagram 10 52 Tray 5 Paper Stacking wiring diagram 10 53 tray feed sensors diagnostic test 4 6 tray lift failure code 87 3 41 tray module paper...

Page 505: ...071 0864 00 A...

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