Brother HL-4140CN Service Manual page 99

■ Error code A1
Cover is Open
Close the Front Cover.
The front cover is open.
<User Check>
- Close the front cover properly.
Step
1 Harness connection failure of
front cover sensor
2 Front cover sensor failure
3 The member part to press the
front cover sensor which is
located at the inner left side of
the front cover is broken.
4 Engine PCB failure
5 Main PCB failure
Cause
2-68
Remedy
Check the harness connection of the
front cover sensor and reconnect it.
Check the sensor performance following
the procedure described in
32". If any problem occurs, replace the
front cover sensor.
Replace the front cover.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
"Function code
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