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Chapter 1 Troubleshooting
1-59
15
Check FAN FUSER
Does FAN FUSER function normally?
Using FAN FUSER diagnostic tool, check by Diagnostic
Output Test.
Replace PWBA
HNB MCU
Go to step [16]
16
Check PWBA HNB DRV for signal
Print 1 sheet.
Is P/J50-7PIN <=> P/J50-9PIN +24VDC?
Go to step [19] Go to step [17]
17
Check PWBA HNB DRV for signal
Print 1 sheet.
Is P/J42-30PIN <=> P/J42-14PIN 0VDC?
Go to step [18]
Replace PWBA
HNB DRV
18
Check PWBA HNB MCU for signal
Print 1 sheet.
Is P/J12-1PIN <=> P/J12-17PIN 0VDC?
Replace PWBA
HNB MCU
Replace
HARNESS ASSY
DRV2
19
Check HARNESS ASSY DUP for continuity
J50 <=> J137 check continuous?
Go to step [20]
Replace
HARNESS ASSY
DUP
20
Check FAN FUSER
Check if an error occurs though the FAN FUSER was
replaced with a new one.
Go to step [21] End of work
21
Check PWBA HNB DRV for signal
Print 1 sheet.
Is P/J50-8PIN <=> P/J50-9PIN +3.3VDC?
Replace FAN
FUSER
Go to step [22]
22
Check PWBA HNB DRV for signal
Print 1 sheet.
Is P/J42-27PIN <=> P/J42-14PIN +3.3VDC?
Replace PWBA
HNB DRV
Go to step [23]
23
Check PWBA HNB MCU for signal
Print 1 sheet.
Is P/J12-4PIN <=> P/J12-17PIN +3.3VDC?
Replace
HARNESS ASSY
DRV2
Replace PWBA
HNB MCU
Step Check
Yes No