Brother HL-4000CN, Service Manual

Page: 228 / 345

V-18
010-350 Fuser Failure FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
Fuser ASSY replacing condition
Replace the parts
concerned
Go to step [2]
2
Checking fuser ASSY connector
Disconnect the fuser ASSY connector,
and check for broken or curved pins.
Go to step [3]
Replace
the parts
concerned
3
Checking fuser ASSY
Check if an error occurs though the
fuser ASSY was replaced with a new one.
Replace MCU and
HVPS PWB
End of work
010-351 Fuser Life Over FIP
Remedy
Step Check
Yes No
1
Checking NVM
Does the error occur even if the fuser
counter is cleared?
Replace MCU and
HVPS PWB
End of work
010-354 Environment Sensor Error FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
HUM TEMP sensor replacing condition
Replace the parts
concerned
Go to step [2]
2
Checking harness ASSY TMPA for signal
Is P/J2361-1PIN<=>P/J2361-2PIN +3VDC
or less than +0.1VDC?
Go to step [4] Go to step [3]
3
Checking harness ASSY TMPA for signal
Is P/J2361-3PIN<=>P/J2361-2PIN more
than +2.5VDC?
Go to step [4]
Replace MCU
and HVPS
PWB
4
Checking harness ASSY TMPA for signal
Is P/J2361-4PIN<=>P/J2361-2PIN
+5VDC?
Replace sensor
HUM TEMP
Replace MCU
and HVPS
PWB