Brother HL-4200CN Service Manual page 224

Step
Checking harness ASSY DRV 2-2 for
continuity
Check the following for continuity.
J12-5PIN<=>J42-26PIN
11
J12-6PIN<=>J42-25PIN
J12-7PIN<=>J42-24PIN
J12-8PIN<=>J42-23PIN
J12-29PIN<=>J42-2PIN
Checking DUP motor
12 Check if an error occurs though the
motor was replaced with a new one.
Dose the exit roll rotate smoothly by
hand?
13
Fuser JAM FIP
Step
Initial setting
Check the following for evidence of fault.
Sensor exit actuator replacing condition
Fuser ASSY replacing condition
Front cover replacing condition
1
Chute DUP in replacing condition
Transfer roll cartridge ASSY replacing
condition
Print head cartridge ASSY replacing
condition
Checking fuser ASSY connector
Remove the fuser ASSY connector, and
2
check for broken or curved pins.
Checking sensor exit
Does sensor exit function normally?
3 Using sensor exit diagnostic tool, check
by
digital input test.
Checking harness FSR2 for signal
4 Push the paper in the fuser ASSY
Is P/J138-3PIN<=>P/J138-2PIN 0VDC?
Checking harness FSR3 for continuity
5 Is J232<=>J138 continuous normally?
Checking harness ASSY front 1A for
6 continuity
Is P138<=>J13 continuous normally?
Checking fuser ASSY
7 Check if an error occurs though the
fuser ASSY was replaced with a new one.
Checking fuser motor for operation
Does the fuser motor run when printing 1
8
sheet?
Check
Check
V-18
Remedy
Yes
Replace
Go to step [12] harness ASSY
DRV2-2
Replace MCU
HL-4200
Check the
Check the sheets gears for
for gear or skew foreign
substances
Remedy
Yes
Replace the parts
Go to step [2]
concerned
With tool
Replace the
Go to step [3]
parts
Without tool
concerned
Go to step [4]
Go to step [4]
Go to step [9]
Go to step [6] Go to step [5]
Replace
Go to step [6] harness ASSY
FSR3
Replace
Go to step [7] harness ASSY
Front 1A
Go to step [9]
Check the gears Go to step [9]
for meshing
Go to step [10]
No
End of work
No
End of work
With tool
Without tool