Text preview for : _Contents740.pdf part of Xerox Phaser 740 wanted service manual
Back to : 740.part1.rar | Home
Contents
General Information 1
The Phaser 740 Color Printer 2 RAM and printer capabilities 4 Print engine assemblies 6 The image processor board 9 Front panel 10 Rear panel 12 Network card LEDs 12 Test print button 13 Health LED 14 Media tray type sensing 14 Specifications 16 Regulatory specifications 19
Error Codes and Messages
21
Error messages 21 Print engine error codes 21 Normal power-up self-tests
29
Troubleshooting
31
System power-up sequence 31 Print engine troubleshooting 32 Testing the print engine 32 Verifying printer operation by using its self-test print 33 Verifying power supply operation 33 Measuring power supply voltages 33 Inspecting the power supply fuses 35 Safety interlocks 35 Testing for a shorted motor 37 Media jams and the paper path 37 Media-based problems 37 Media problems 37 Multiple-sheet pick 38 The media skews passing through the paper path 38 Paper tray indicates empty when it is not 38 No paper feeder installed 39 No imaging unit installed 39
Service Guide
1
Jams 39 Paper mis-picks at the paper tray 39 Paper jams midway in the paper feeder 40 Paper jams at the second bias transfer roller 40 Fuser jams 41 Eject jams 42 Multi-purpose tray feed jams 42 Jams in the auto-duplex unit 43 Other problems 43 The printer continuously displays "Initializing" 43 No toner cartridge installed message when it is 43 No fuser installed message when it is 44 No fuser roll installed message when it is 44 Front door open when it is closed 44 Left-side door open message when it is not 45 High temperature error 45 Low temperature error 45 High voltage error 46 Thermistor open error 46 Front panel cycling between READY and WARMING UP 46 Erratic printer behavior 46 Installed RAM not recognized 46 Printing and print quality problems 47 Blank print 47 All-black print 47 Missing primary color 48 Light print 48 Repeated spots or lines on print in-line with each other 49 Dark vertical line in print 49 White horizontal line or band in all the colors of a print 49 Vertical lines in the print 50 Dirty background 50 Mis-transfer, missing portions of toner 50 Dark, irregular steaks in all colors 50 Ghosting 51 Unfused or partially fused printing 51 Image is skewed on the paper 51 Stains on the back of the print 51 No printing on edge of print 52 Image is not centered on the print when it should be 52 The print is wrinkled 52 Macintosh printing problems 53 Image never prints 53 Image prints in black-and-white 53 Image is rotated 90 degrees 54 Printer isn't in the Chooser 54 Windows printing problems 54 Image never prints 54
Service Tests and Adjustments 2
55
Phaser 740 Color Printer
Required tools 55 Printing test prints 56 Print service test prints 56 Printing the Configuration Page 56 Printing the demonstration pages 56 Printing the print engine's test print 56 Printer self-diagnostics 57 Service tests 57 Print engine calibration 60 Printer color correction 60 Manually setting color corrections 60
Cleaning and Maintenance
63
63
Service preventive maintenance procedure Recommended tools 64 Cleaning 64 Lubrication 65
Resetting NVRAM
67 69
Key FRU Disassembly
Printer cabinet 69 EMI shields 71 Cartridge selector/eject unit (right door) 72 Paper feeder and tray sensor board 74 Multi-purpose tray pick roller 75 Cork separator pad 76 Laser scanner 77 Power supply 78 Main motor 79 Paper feed motor 79 Toner cartridge drive motor 79 Toner cartridge drive unit 80 Accumulator belt home position sensor 80 Left door open interlock switch 80 Temperature/humidity sensor board 81 Pre-exposure lamp 81 Pre-transfer lamp 81 Gear train 82 Tray guides 83 Engine control board 84 High-voltage board 85 Image processor board 86
FRU List
87
98
Supplies and accessories
Service Guide
3
Test Prints
103 113
Wiring Diagram
4
Phaser 740 Color Printer
Figures
The Phaser 740 Color Printer 1 Print engine major components 6 Print engine components (continued) 7 Print engine sensor, switch and solenoid locations 8 Features of the image processor board 9 The front panel 11 The Phaser 740 rear panel 13 Tray switch sensors and actuators 15 Measuring the DC voltages (test points) 34 Door safety interlock switches 36 Manual color correction reference print 61 Removing cabinet covers 69 Removing cabinet covers 70 Removing the EMI shields 71 Removing the cartridge selector/eject unit 73 Removing the paper feeder 74 Removing the multi-purpose tray pick roller 75 Removing the cork separator pad 76 Removing the laser scanner and driver board 77 Removing the power supply 78 Removing the main motor, paper-feed motor, toner cartridge drive motor and cleaning board 79 Removing the toner cartridge drive unit, home position sensor and the left door interlock switch 80 Removing the temperature/humidity sensor board 81 Removing the pre-exposure lamp and pre-transfer lamp 81 Removing the gear train 82 Removing the tray guides 83 Removing the engine control board 84 Removing the high-voltage board 85 Removing the image processor board 86 Cabinet FRUs 88 Cabinet FRUs 89 Motor and fan FRUs 91 Sensor, switch and flag FRUs 93 Circuit board and electronic FRUs 95 Imaging and paper feed component FRUs 97 Wiring diagram 113
Service Guide
5
Tables
Installed RAM and printer capabilities 4 Tray switch sensor combinations 14 Physical dimensions 16 Printer clearances 16 Functional specifications 17 Electrical specifications 18 Environmental specifications 18 Print engine service error codes 21 Normal power up error codes 29 Print engine service test descriptions 57 FRU parts list of the printer cabinet 88 FRU part list of the printer cabinet 89 Motors, drive units and fans 90 Sensors, switches and flags 92 Circuit board and electronics 94 Imaging and paper feed components 96 Kits and other hardware 98 Supplies and accessories 98
6
Phaser 740 Color Printer