Service manual

V-14
Remedy
Step Check
Yes No
13
Checking drive PWBA HBN DRV for
signal
Print 1 sheet.
Is P/J42-29PIN<=>P/J42-14PIN
+3.3VDC?
Replace PWBA
HBN DRV
Go to step [14]
14
Checking MCU HL-4200 for signal
Print 1 sheet.
Is P/J12-2PIN<=>P/J12-17PIN +3.3VDC?
Replace harness
ASSY DRV2-2
Replace MCU
HL-4200
15
Checking fuser fan
Does fuser fan function normally?
Using fuser fan diagnostic tool, check by
digital output test.
Replace MCU
HL-4200
Go to step [16]
16
Checking drive PWBA HBN DRV for
signal
Print 1 sheet.
Is P/J50-7PIN<=>P/J50-9PIN +24VDC?
Go to step [19] Go to step [17]
17
Checking drive PWBA HBN DRV for
signal
Print 1 sheet.
Is P/J42-30PIN<=>P/J42-14PIN 0VDC?
Go to step [18]
Replace PWBA
HBN DRV
18
Checking MCU HL-4200 for signal
Print 1 sheet.
Is P/J12-1PIN<=>P/J12-17PIN 0VDC?
Replace MCU
HL-4200
Replace
harness ASSY
DRV2-2
19
Checking harness ASSY DUP2 for
continuity
Is J50<=>J137 continuous normally?
Go to step [20]
Replace
harness ASSY
DUP2
20
Checking fuser fan
Check if an error occurs though the fuser
fan was replaced with a new one.
Go to step [21] End of work
21
Checking drive PWBA HBN DRV for
signal
Print 1 sheet.
Is P/J50-8PIN<=>P/J50-9PIN +3.3VDC?
Replace Fuser fan Go to step [22]
22
Checking drive PWBA HBN DRV for
signal
Print 1 sheet.
Is P/J42-27PIN<=>P/J42-14PIN
+3.3VDC?
Replace PWBA
HBN DRV
Go to step [23]
23
Checking MCU HL-4200 for signal
Print 1 sheet.
Is P/J12-4PIN<=>P/J12-17PIN +3.3VDC?
Replace harness
ASSY DRV2-2
Replace MCU
HL-4200