Service manual

V-36
Upper Cassette Detached FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
Size switch ASSY replacing condition
actuator replacing condition
Paper cassette replacing condition
Replace the parts
concerned
With tool
Go to step [2]
Without tool
Go to step [3]
2
Checking size switch ASSY
Does size switch ASSY function normally?
Size switch ASSY using diagnostic tool,
check by digital input test.
Replace MCU
HL-4200
Go to step [3]
3
Checking PWBA HBN DRV for signal
Check the following, and does the result
meet the combination table?
P/J47-1PIN<=>P/J47-3PIN
P/J47-2PIN<=>P/J47-3PIN
P/J47-4PIN<=>P/J47-3PIN
Refer to paper size control of operation
principle
Go to step [4]
Replace size
switch ASSY
4
Checking PWBA HBN DRV for signal
Check the following, and does the result
meet the combination table?
P/J42-16PIN<=>P/J42-15PIN
P/J42-17PIN<=>P/J42-15PIN
P/J42-18PIN<=>P/J42-15PIN
Replace MCU
HL-4200
Replace PWBA
HBN DRV
Tray1 Paper Near Empty FIP
Remedy
Step Check
Yes No
v
Initial setting
Check the following for evidence of fault.
Tray1 low paper sensor replacing
condition
Sensor actuator replacing condition
Replace the parts
concerned
Go to step [2]
2
Does the error occur even if the paper is
added?
With tool
Go to step [3]
Without tool
Go to step [4]
End of work
3
Checking tray1 low paper sensor
Does tray1 low paper sensor function
normally?
Tray1 low paper sensor using diagnostic
tool, check by digital input test.
Replace MCU
HL-4200
Go to step [4]
4
Checking PWBA HBN DRV for signal
Is P/J47-10<=>P/J47-9 +3.3VDC?
Go to step [6] Go to step [5]
5
Checking PWBA HBN DRV for signal
Is P/J42-20<=>P/J42-15 +3.3VDC?
Replace PWBA
HBN DRV
Replace MCU
HL-4200
6
Checking PWBA HBN DRV for signal
Is P/J47-8<=>P/J47-9 +3.3VDC?
Replace tray1 low
paper sensor
Replace PWBA
HBN DRV