iv
Confidential
CHAPTER 5 SERVICE FUNCTIONS
1. MAINTENANCE MODE ............................................................................................................... 5-1
1.1 How to Enter Maintenance Mode ....................................................................................... 5-1
1.1.1 Method of entering maintenance mode for service personnel ............................... 5-1
1.1.2 Method of entering end-user accessible maintenance mode ................................. 5-2
1.2 List of Maintenance Mode Functions .................................................................................. 5-3
1.2.1 List of maintenance mode functions for LCD models ............................................. 5-3
1.2.2 List of maintenance mode functions using [Go] (LED models) .............................. 5-4
1.3 Details of Maintenance Mode Functions for LCD Models ................................................... 5-6
1.3.1 Initialize EEPROM parameters (Function code 01, 91) .......................................... 5-6
1.3.2 Transition to shipping state (Function code 03) ..................................................... 5-7
1.3.3 Monochrome print quality test pattern (Function code 09) ..................................... 5-9
1.3.4 Set worker switches (WSW) and
print worker switch setting data (Function code 10, 11) ....................................... 5-10
1.3.5 Check LCD operation (Function code 12) ............................................................ 5-13
1.3.6 Check control panel key operation (Function code 13) ........................................ 5-14
1.3.7 Display software version (Function code 25) ....................................................... 5-15
1.3.8 Check sensor operation (Function code 32) ........................................................ 5-16
1.3.9 Display LAN connection status (Function code 33) .............................................. 5-17
1.3.10 Change USB No. return value / Adjust left-end print position /
Adjust upper-end print position /
Change ON/OFF setting for lower case compensation /
Change ON/OFF setting for fixation strength improvement
(Function code 45) ............................................................................................... 5-18
1.3.11 Check toner cartridge (Models with cartridge sensor only) (Function code 57) ... 5-22
1.3.12 Continuous print test (Function code 67) ............................................................. 5-24
1.3.13 Print frame pattern (single-side printing) (Function code 69) ............................... 5-28
1.3.14 Print frame pattern (duplex printing) (Function code 70) ...................................... 5-29
1.3.15 Print test pattern (Function code 71) .................................................................... 5-30
1.3.16 Setting by spec (Function code 74) ...................................................................... 5-33
1.3.17 Print maintenance information (Function code 77) ............................................... 5-36
1.3.18 Check fan operation (Function code 78) .............................................................. 5-38
1.3.19 Display machine log information (Function code 80) ........................................... 5-39
1.3.20 Display machine error code (Function code 82) ................................................... 5-41
1.3.21 Reset irregular power supply detection counter of
low-voltage power supply PCB (Function code 88) .............................................. 5-41
1.3.22 Quit maintenance mode (Function code 99) ........................................................ 5-41
1.4 Details of Maintenance Mode Functions Using [Go] (LED models) .................................. 5-42
1.4.1 Test printing .......................................................................................................... 5-42
1.4.2 Change USB No. return value .............................................................................. 5-43
1.4.3 Factory reset / Settings reset ............................................................................... 5-43
1.4.4 Engine error ignore mode ..................................................................................... 5-44
1.4.5 Check sensor operation ....................................................................................... 5-45
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