Brother HL-4000CN - Page 244

V-34
Transfer Roll Cartridge Life Over FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
Transfer roll cartridge ASSY replacing
condition
Waste toner sensor replacing condition
Replace the parts
concerned
Go to step [2]
2
Checking waste toner sensor
Does waste toner sensor function
normally?
Waste toner sensor using diagnostic tool,
check by Digital Input Test.
Go to step [6] Go to step [3]
3
Checking harness ASSY TFLSNS for
signal
Remove the transfer roll cartridge ASSY
Is P/J141-2PIN<=>P/J141-1PIN 0VDC?
Go to step [6] Go to step [4]
4
Checking harness ASSY TFLSNS for
signal
Is P/J141-3PIN<=>P/J141-1PIN +5VDC?
Go to step [5]
Replace
harness ASSY
EEPROM
5
Checking harness ASSY TFLSNS for
continuity
Is J142<=>J142 continuous normally?
Replace waste
toner sensor
Replace
harness ASSY
TFLSNS
6
Checking transfer roll cartridge ASSY
Check if an error occurs though the
transfer roll cartridge ASSY was replaced
with a new one.
Replace MCU and
HVPS PWB
End of work
Print Head Cartridge Life Over FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
Print head cartridge ASSY replacing
condition
PWBA CRUM in print head cartridge
ASSY replacing condition
Replace the parts
concerned
Go to step [2]
2
Checking PWBA CRUM for connection
Is PWBA CRUM connector connected to
the harness connector normally?
Go to step [3]
Replace
harness ASSY
CRUM
3
Checking harness ASSY CRUM for
continuity
Is J170<=>J71 continuous normally?
Go to step [4]
Replace
harness ASSY
FSR2
4
Checking harness ASSY EEPROM for
continuity
Is P71<=>J140 continuous normally?
Go to step [5]
Replace
harness ASSY
EEPROM
5
Checking print head cartridge ASSY
Check if an error occurs though the print
head cartridge ASSY was replaced with a
new one.
Replace MCU and
HVPS PWB
End of work