Brother HL-4200CN Service Manual page 240

CRUM ID Error FIP (Print Head Cartridge)
Step
Check the following for failure:
1 Installation of toner cartridge
Installation of PWB CRUM reader
Check connection of PWB CRUM reader.
Is the PWB CRUM reader connector
2
properly connected to the harness
connector?
Check continuity of harness ASSY RFID2
(J341-3411).
3
Is continuity proper between
J341<=>J3411?
Check continuity of harness ASSY RFID
(J34-3411).
4
Is continuity proper between
P3411<=>J34?
Check Toner Cartridge.
5 Has error occurred after installing the new
toner cartridge?
CTD Sensor Dustiness 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 CTD for signal
5
Is P/J1361-1PIN<=>P/J1361-3PIN 0VDC?
Check
Check
V-34
Remedy
Yes
Reinstall the
appropriate Go to step [2]
part
Replace
Go to step [3]
harness ASSY
Replace
Go to step [4]
harness ASSY
Replace
Go to step [5]
harness ASSY
Replace MCU
HL-4200
Remedy
Yes
Replace the parts
Go to step [2]
concerned
Replace the
Go to step [3] parts
concerned
Replace
Go to step [4] harness ASSY
CTD
Replace
Go to step [5] harness ASSY
front 1A
Replace ADC Replace MCU
sensor ASSY HL-4200
No
End of work
No