AR-C170 (serv.man28). Troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 27

AR-C170M  TROUBLESHOOTING  11 - 27

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

DLUD1 does not turn on 
within the specified time.

Section

Desk

Case 1

Cause

DLUD1 sensor trouble, 
paper feed unit harness 
disconnection

Check & 
Remedy

Check DLUD1 and the 
harness and the connector.

Case 2

Cause

Cassette 1 lift-up motor 
trouble, desk PWB, lift-up 
unit trouble

Check & 
Remedy

Check the lift-up unit.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

DLUD2 does not turn on 
within the specified time.

Section

Desk

Case 1

Cause

DLUD2 sensor trouble, 
paper feed unit harness 
disconnection

Check & 
Remedy

Check DLUD2 and the 
harness and the connector.

Case 2

Cause

Desk cassette 2 lift-up 
motor trouble, desk PWB, 
lift-up unit trouble

Check & 
Remedy

Check the lift-up unit.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

DLUD3 does not turn on 
within the specified time.

Section

Desk

Case 1

Cause

DLUD3 sensor trouble, 
paper feed unit harness 
disconnection

Check & 
Remedy

Check DLUD3 and the 
harness and the connector.

Case 2

Cause

Desk cassette 3 lift-up 
motor trouble, desk PWB, 
lift-up unit trouble

Check & 
Remedy

Check the lift-up unit.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

• The encoder input value 

does not change in 
0.13sec (first time)/0.5sec 
(second time or later) 
after rotation of the motor.

• The motor is rotated for 

18sec or more.

• The encoder changes 

after the specified time 
from termination of the 
motor. (2sec and 10 
counts or more)

Section

LCC

Common

Check

Use SIM 4-2 and 4-3 to 
check the sensor operation 
and the lift motor operation.
Cancel the trouble with SIM 
15.

Case 1

Cause

Sensor trouble

Check & 
Remedy

Replace the sensor.

Case 2

Cause

LCC control PWB trouble

Check & 
Remedy

Replace the LCC control 
PWB.

Case 3

Cause

Gear breakage

Check & 
Remedy

Replace the gear.

Case 4

Cause

Lift motor trouble

Check & 
Remedy

Replace the lift motor.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

Desk transport motor 
operation trouble

Section

—

Case 1

Cause

Motor lock, motor RPM 
abnormality, Over current to 
the motor, saddle finisher 
control PWB trouble

Check & 
Remedy

Use SIM 4-3 to check the 
desk transport motor 
operation.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

Communication error with 
the LCC.
Communication line test 
error after turning on the 
power or canceling an 
exclusive simulation.
Discrepancy of the model 
code between the LCC and 
the machine.

Section

—

Common Turn OFF/ON the power to 

cancel the error.