Brother HL-4140CN Service Manual page 97

■ Error code 9A
Manual Feed
Load <size> Paper.
No paper is loaded in the MP tray (MP paper empty sensor fails to be turned ON.)
<User Check>
- Load paper in the MP tray.
Step
1 Coming off of MP paper empty
actuator
2 Harness connection failure of
MP paper empty/registration
front sensor PCB
3 MP paper empty sensor/
registration front sensor PCB
failure
4 Engine PCB failure
5 Main PCB failure
■ Error code 9D
Registration
Registration failed. See Troubleshooting chapter in User's Guide.
Detection of incorrect registration sensor measurement value when implementing adjustment
of inter-color position alignment.
<User Check>
- Check if there is a scratch, dirt or the like on the belt unit. If there is, replace the belt unit
with a new one.
- Replace the waste toner box with a new one.
Step
1 Foreign object is affixed around
the density sensor
2 Harness connection failure of
registration mark sensor holder
ASSY
3 Registration mark sensor PCB
failure
4 High-voltage power supply PCB
failure
5 Engine PCB failure
6 Low-voltage power supply PCB
failure
7 Main PCB failure
Cause
Cause
2-66
Remedy
Re-assemble the MP paper empty
actuator.
Check the harness connection of the
MP paper empty/registration front sensor
PCB and reconnect it.
Replace the MP paper empty/registration
front sensor PCB ASSY.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
Remedy
Remove the foreign object affixed around
the density sensor.
Check the harness connection of the
registration mark sensor holder ASSY and
reconnect it.
Replace the registration mark sensor
holder ASSY.
Replace the high-voltage power supply
PCB ASSY.
Replace the engine PCB ASSY.
Replace the low-voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
Confidential