AR-C260 (serv.man14). (11) Troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 20

AR-C260/C260M  TROUBLESHOOTING  11 - 20

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Phenomenon

Detail

Fusing unit initial detection 
trouble

Section

Fusing

Case 1

Cause

Disconnection of the 
connector

Check & 
Remedy

Check connection of the 
fusing unit initial sensor. 
Check connection of the 
connector and the harness 
to the PCU PWB. 

Case 2

Cause

Connector harness trouble

Check & 
Remedy

Check for disconnection of 
the harness. 

Case 3

Cause

Fusing unit trouble

Check & 
Remedy

Replace the fusing unit.

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Lamp/Message

Phenomenon

Detail

Mirror feed is not 
completed within the 
specified time. 

Section

—

Case 1

Cause

Mirror unit trouble, mirror 
wire breakage

Check & 
Remedy

Use SIM 1-1 to check the 
mirror operation. 

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Lamp/Message

Phenomenon

Detail

Mirror return is not 
completed within the 
specified time. 

Section

—

Case 1

Cause

Mirror unit trouble, mirror 
wire breakage

Check & 
Remedy

Use SIM 1-1 to check the 
mirror operation. 

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Lamp/Message

Phenomenon

Detail

In warm-up, or in canceling 
a jam, the paper feed 
motor is rotated, and the 
lock signal is not detected 
within 1sec.

Section

Paper feed

Case 1

Cause

Paper feed motor trouble, 
disconnection of the 
harness between the PCU 
PWB and the paper feed 
motor, control circuit 
trouble

Check & 
Remedy

Use SIM 6-1 to check the 
paper feed motor 
operation. Check the 
harness and the connector 
between the PCU PWB 
and the paper feed motor.

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Lamp/Message

Phenomenon

Detail

When the belt motor lifts 
up or down, the change in 
the belt home position 
sensor characteristics is 
not detected within the 
specified time. 
(When the motor lifts up, 
the lower limit sensor 
remains ON after the 
specified time.)
(When the motor lifts 
down, the lower limit 
sensor does not turn on 
after the specified time.)

Section

Paper feed

Case 1

Cause

Belt lift motor trouble, 
disconnection of the 
harness between the PCU 
PWB and the belt lift motor, 
control circuit trouble

Check & 
Remedy

Use SIM 6-1 to check the 
belt lift motor operation. 
Check the harness and the 
connector between the PCU 
PWB and the belt lift motor. 

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Lamp/Message

Phenomenon

Detail

1) Before driving the drum, 
the calibration plate is 
opened with the process 
control BK sensor, and 
light is emitted with the 
gain value of 0 and with 
the light emitting quantity 
fixed to 120. The average 
of ten light quantities 
repeats to be 5 or less for 
3 times continuously.
2) Immediately after 
driving the drum, the 
calibration plate is opened 
with the process control 
BK sensor, and one whole 
turn of the belt surface is 
scanned with the gain 
value of 0 and with the 
light emitting quantity at 
the optimum value (120 ~ 
50). The difference 
between the max. value 
and the min. value of the 
scanned data is 5 or less.

Section

Paper feed