Brother HL-4200CN Service Manual page 243

Tray2 Paper Near Empty FIP
Step
Initial setting
Check the following for evidence of fault.
1 Tray2 low paper sensor replacing
condition
Sensor actuator replacing condition
Does the error occur even if the paper is
added?
2
Checking tray2 low paper sensor
Does tray2 low paper sensor function
3 normally?
Tray2 low paper sensor using diagnostic
tool, check by digital input test.
Checking PWBA OPTFDR for signal
4
Is P/J82-10 PIN <=>P/J82-9 +3.3VDC?
Checking PWBA OPTFDR for signal
5
Is P/J81-18 PIN <=>P/J81-23 +3.3VDC?
Harness ASSY OPFPLG/ harness ASSY
Checking OPFREC/ harness ASSY
OPFMAIN for continuity
6
Check the following for continuity.
J81-18PIN<=>J810-A9PIN<=>J210-
B9PIN<=>J21-9PIN
Checking PWBA OPTFDR for signal
7
Is P/J82-8PIN<=>P/J82-9 +5VDC?
Tray3 Paper Near Empty FIP
Step
Initial setting
Check the following for evidence of fault.
1 Tray3 low paper sensor replacing
condition
Sensor actuator replacing condition
Does the error occur even if the paper is
added?
2
Checking tray3 low paper sensor
Does tray3 low paper sensor function
3 normally?
Tray3 low paper sensor using diagnostic
tool, check by digital input test.
Checking PWBA OPTFDR for signal
4
Is P/J83-10 PIN <=>P/J83-9 +3.3VDC?
Checking PWBA OPTFDR for signal
5
Is P/J81-17 PIN <=>P/J81-23 +3.3VDC?
Harness ASSY OPFPLG/ harness ASSY
Checking OPFREC/ harness ASSY
OPFMAIN for continuity
6
Check the following for continuity.
J81-17PIN<=>J810-A10PIN<=>J210-
B10PIN<=>J21-10PIN
Checking PWBA OPTFDR for signal
7
Is P/J83-8PIN<=>P/J83-9 +5VDC?
Check
Check
V-37
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 [7] Go to step [5]
Replace PWBA
Go to step [6]
OPTFDR
Replace MCU Replace
HL-4200 harness ASSY
Replace PWBA which is not
OPTFDR continuous
Replace tray2 Replace PWBA
low paper sensor OPTFDR
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 [7] Go to step [5]
Replace feeder
Go to step [6]
PWBA HBN DRV
Replace MCU Replace
HL-4200 harness ASSY
Replace PWBA which is not
OPTFDR continuous
Replace tray3 Replace PWBA
low paper sensor OPTFDR
No
End of work
No
End of work