Brother HL-4000CN - Page 226

V-16
003-340 Firmware Error FIP
Remedy
Step Check
Yes No
1
Does an error occur even if the power is
turned off and on? Replace MCU and
HVPS PWB
If the error
recurs, replace
MCU and
HVPS PWB
003-356 NV-RAM Error FIP
Remedy
Step Check
Yes No
1
Does an error occur even if the power is
turned off and on? Replace MCU and
HVPS PWB
If the error
recurs, replace
MCU and
HVPS PWB
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 and
HVPS PWB
End of work