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Service Guide
vii
Service Tests and Adjustments 61
Diagnostics mode 61
Switch scan test 63
LED head test 68
Motor and clutch tests 69
Test printing 71
Consumable count initialization 73
Consumable counter display 75
Consumable continuation counter display 76
Adjusting color density and balance 77
Printing a Test Page 77
Interpreting the Color Balance test print 77
What to look for 78
Making adjustments 78
Adjustment recovery 79
Cleaning and Maintenance 81
Service preventive maintenance procedure 81
Recommended tools 82
Periodically replaced parts 82
Cleaning 83
Cleaning the LED bar 83
Cleaning the pickup roller 83
Resetting NVRAM 85
FRU Disassembly 87
Cabinet panels 87
Top cover 87
Left-side cover 88
Right-side cover 89
Rear cover 90
Front cover 91
Face-up tray 92
Frames components 93
Right shield plate 93
Electrical chassis (card cage) 94
Electrical chassis cooling fan 96
Printer unit chassis 97
Main cooling fan 99
Top cover inner frame 100
Left/right top cover spring assembly 103
Left paper tray guide assembly 104
Right paper tray guide assembly 106