iv
Confidential
Method of entering maintenance mode for service personnel ............................... 5-1
Method of entering end-user accessible maintenance mode ................................. 5-2
List of maintenance mode functions for LCD models ............................................. 5-3
List of maintenance mode functions using [Go] (LED models) .............................. 5-4
Initialize EEPROM parameters (Function code 01, 91) .......................................... 5-6
Monochrome print quality test pattern (Function code 09) ..................................... 5-9
Check control panel key operation (Function code 13) ........................................ 5-14
Display LAN connection status (Function code 33) .............................................. 5-17
1.3.10 Change USB No. return value / Adjust left-end print position /
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