Brother HL-4000CN - Page 245

V-35
CRUM ID Error FIP
Remedy
Step Check
Yes No
1
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
CRUM
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
CTD Sensor Dustiness FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
Transfer roll cartridge ASSY replacing
condition
ADC sensor ASSY replacing condition
Replace the parts
concerned
Go to step [2]
2
Checking harness ASSY CTD for
connection
Is the harness ASSY CTD connected to
the ADC sensor ASSY normally?
Go to step [3]
Replace the
parts
concerned
3
Checking harness ASSY CTD for
continuity
Is J136<=>J1361 continuous normally?
Go to step [4]
Replace
harness ASSY
CTD
4
Checking harness ASSY front 1A for
continuity
Is P1361<=>J13 continuous normally?
Go to step [5]
Replace
harness ASSY
front 1A
5
Checking harness ASSY CTD for signal
Is P/J1361-1PIN<=>P/J1361-3PIN 0VDC?
Replace ADC
sensor ASSY
Replace MCU
and HVPS
PWB