Brother HL-4200CN Service Manual page 242

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