Brother HL-4000CN - Page 227

V-17
009-342 LOW Density Error 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
Print head cartridge ASSY replacing
condition
Residual toner
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 transfer roll cartridge ASSY
Check if an error occurs though the
transfer roll cartridge ASSY was replaced
with a new one.
Go to step [6] End of work
6
Checking print head cartridge ASSY
Check if an error occurs though the print
head cartridge ASSY was replaced with a
new one.
Go to step [7] End of work
7
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
010-317 Fuser Detached FIP
Remedy
Step Check
Yes No
1
Initial setting
Check the following for evidence of fault.
Fuser ASSY replacing condition
Replace the parts
concerned
Go to step [2]
2
Checking fuser ASSY
Remove the fuser and measure resistance
value
Is P232-A4PIN<=>P232-A5PIN less than
400KΩ?
Go to step [3]
Replace fuser
ASSY
3
Checking harness ASSY FSR2 for
continuity
Is J232<=>J138 continuous normally?
Go to step [4]
Replace
harness ASSY
FSR2
4
Checking harness ASSY front 1A for
continuity
Is P138<=>J13 continuous normally?
Replace MCU and
HVPS PWB
Replace
harness ASSY
front 1A