Brother HL-4200CN Service Manual page 222

010-317 Fuser Detached FIP
Step
Initial setting
1 Check the following for evidence of fault.
Fuser ASSY replacing condition
Checking fuser ASSY
Remove the
resistance
2
value
Is P232-A4PIN<=>P232-A5PIN less than
400K�?
Checking harness ASSY FSR3 for
continuity
3
Is J232<=>J138 continuous normally?
Checking harness ASSY front 1A for
4 continuity
Is P138<=>J13 continuous normally?
010-350 Fuser Failure FIP
Step
Initial setting
Check the following for evidence of fault.
Fuser ASSY replacing condition
1
<Warning>
Do not power On and Off while FUSER
ASSY is removed.
It will be in danger of getting a shock.
Checking fuser ASSY connector
2 Disconnect the fuser ASSY connector,
and check for broken or curved pins.
Checking fuser ASSY
3 Check if an error occurs though the
fuser ASSY was replaced with a new one.
010-354 Environment Sensor Error FIP
Step
Initial setting
1 Check the following for evidence of fault.
HUM TEMP sensor replacing condition
Checking harness ASSY TMPA for signal
2 Is P/J2361-1PIN<=>P/J2361-2PIN +3VDC
or less than +0.1VDC?
Checking harness ASSY TMPA for signal
3 Is P/J2361-3PIN<=>P/J2361-2PIN more
than +2.5VDC?
Checking harness ASSY TMPA for signal
4 Is P/J2361-4PIN<=>P/J2361-2PIN
+5VDC?
Check
fuser and measure
Check
Check
V-16
Remedy
Yes
Replace the parts
Go to step [2]
concerned
Replace fuser
Go to step [3]
ASSY
Replace
Go to step [4]
harness ASSY
FSR3
Replace
Replace MCU
harness ASSY
HL-4200
front 1A
Remedy
Yes
Replace the parts
Go to step [2]
concerned
Replace
Go to step [3] the parts
concerned
Replace MCU
HL-4200
Remedy
Yes
Replace the parts
Go to step [2]
concerned
Go to step [4] Go to step [3]
Replace MCU
Go to step [4]
HL-4200
Replace sensor Replace MCU
HUM TEMP HL-4200
No
No
End of work
No