Service manual

V-15
003-340 Firmware Error FIP
Remedy
Step Check
Yes No
1
Does the error still happen even after
powering Off and On was done?
Go to step [2] End of work
2
Check whether the value of NVM is
correct.
Is the value of NVM correct?
Replace MCU
HL-4200
Correct the
value of NVM.
003-356 NV-RAM Error FIP
Remedy
Step Check
Yes No
1
Does the error still happen even after
powering Off and On was done?
Go to step [2] End of work
2
Remove following components once, and
reinstall them correctly.
Print head cartridge ASSY
FUSER ASSY
PWBA EEPROM
MCU HL-4200
Does the error still happen even after
powering Off and On was done?
Go to step [3] End of work
3
Replace print head cartridge ASSY.
Does the error still happen even after
powering Off and On was done?
Go to step [4] End of work
4
Replace FUSER ASSY.
Does the error still happen even after
powering Off and On was done?
Go to step [5] End of work
5
Replace PWBA EEPROM.
Does the error still happen even after
powering Off and On was done?
Replace MCU
HL-4200
End of work
006-370 Scanner Failure FIP
Remedy
Step Check
Yes No
1
Checking harness ASSY scanner KA for
continuity
Is J15<=>P151 continuous normally?
Replace scanner
ASSY
Replace
harness ASSY
scanner KA
009-340 CTD Sensor Error FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
ADC sensor ASSY replacing condition
Replace the parts
concerned
Go to step [2]
2
Checking harness ASSY CTD for
continuity
Is J136<=>J1361 continuous normally?
Go to step [3]
Replace
harness ASSY
CTD
3
Checking harness ASSY front 1A for
continuity
Is J13<=>P1361 continuous normally?
Go to step [4]
Replace
harness ASSY
front 1A
4
Checking ADC sensor ASSY
Check if an error occurs though the ADC
sensor ASSY was replaced with a new
one.
Replace MCU
HL-4200
End of work