Brother HL-4200CN Service Manual page 234

Transfer Roll Cartridge Detached FIP
Step
Initial setting
Check the following for evidence of fault.
1 Transfer roll cartridge ASSY replacing
condition
ADC sensor ASSY replacing condition
Checking harness ASSY CTD for
connection
2
Is the harness ASSY CTD connected to
the ADC sensor ASSY normally?
Checking harness ASSY CTD for
3 continuity
Is J136<=>J1361 continuous normally?
Checking harness ASSY front 1A for
4 continuity
Is P1361<=>J13 continuous normally?
Checking harness ASSY front 1A for
5 signal
Is P/J136-5PIN<=>P/J136-3PIN 0VDC?
Checking transfer roll cartridge ASSY
6 Replace new transfer roll cartridge ASSY,
and check if an error occurs.
Print Head Cartridge Detached FIP
Step
Initial setting
Check the following for evidence of fault.
Print head cartridge ASSY replacing
condition
1
PWBA HBN DRVA CRUM in print head
cartridge
ASSY replacing
condition
Checking PWBA HBN DRVA CRUM for
connection
2 Is PWBA HBN DRVA CRUM connector
connected to
the harness connector normally?
Checking harness ASSY CRUM for
continuity
3
Is J170<=>J71 continuous normally?
Checking harness ASSY EEPROM for
continuity
4
Is P71<=>J140 continuous normally?
Checking print head cartridge ASSY
5 Replace new print head cartridge ASSY,
and check if an error occurs.
Check
Check
V-28
Remedy
Yes
Replace the parts
Go to step [2]
concerned
Replace the
Go to step [3] parts
concerned
Replace
harness ASSY
Go to step [4]
CTD
Replace
Go to step [5] harness ASSY
front 1A
Replace ADC
Go to step [6]
sensor ASSY
Replace MCU
HL-4200
Remedy
Yes
Replace the parts
Go to step [2]
concerned
Replace
Go to step [3]
harness ASSY
CRUM
Replace
Go to step [4]
harness ASSY
CRUM
Replace
Go to step [5]
harness ASSY
EEPROM
Replace MCU
HL-4200
No
End of work
No
End of work