AR-C260 (serv.man14). (11) Troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 17

AR-C260/C260M  TROUBLESHOOTING  11 - 17

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon

Detail

Second step operation 
error during half-tone 
process control

Section

—

Common

Check

Use SIM 44-2 to adjust the 
process control sensor 
gain. 

Case 1

Cause

When "Error" occurs in the 
gain adjustment of SIM 44-
2:
1. Disconnection of the 

harness between the 
PCU PWB and the 
image density sensor.

2. Image density sensor 

dirt/trouble

Check & 
Remedy

1. Check connection of 

the harness between 
the PCU PWB and the 
image density sensor.

2. Clean/replace the 

image density sensor. 

Case 2

Cause

When SIM 44-2 gain 
adjustment is completed:
Insufficient cleaning of the 
transfer belt, calibration 
plate solenoid operation 
trouble

Check & 
Remedy

Check the drum surface 
and the belt surface. 

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon

Detail

Second step operation 
error during half-tone 
process control

Section

—

Common

Check

Use SIM 44-2 to adjust the 
process control sensor 
gain. 

Case 1

Cause

When "Error" occurs in the 
gain adjustment of SIM 44-
2:
1. Disconnection of the 

harness between the 
PCU PWB and the 
image density sensor.

2. Image density sensor 

dirt/trouble

Check & 
Remedy

1. Check connection of 

the harness between 
the PCU PWB and the 
image density sensor.

2. Clean/replace the 

image density sensor. 

Case 2

Cause

When SIM 44-2 gain 
adjustment is completed:
Insufficient cleaning of the 
transfer belt, calibration 
plate solenoid operation 
trouble

Check & 
Remedy

Check the drum surface 
and the belt surface. 

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon

Detail

The difference between 
the correction value after 
execution of half-tone 
process control and the 
previous correction value 
exceeds the specified 
max. value of each color.
<The error is recorded in 
the trouble history, but F2 
trouble is not indicated on 
the display and the 
previous correction value 
is remained.> 

Section

—

Common

Check

Use SIM 44-2 to adjust the 
process control sensor 
gain. 

Case 1

Cause

When "Error" occurs in the 
gain adjustment of SIM 44-
2:
1. Disconnection of the 

harness between the 
PCU PWB and the 
image density sensor.

2. Image density sensor 

dirt/trouble

Check & 
Remedy

1. Check connection of 

the harness between 
the PCU PWB and the 
image density sensor.

2. Clean/replace the 

image density sensor. 

Case 2

Cause

When SIM 44-2 gain 
adjustment is completed: 
Insufficient cleaning of the 
transfer belt, calibration 
plate solenoid operation 
trouble

Check & 
Remedy

Check the drum surface 
and the belt surface. 

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon

Detail

LUD1 does not turn on 
within the specified time. 

Section

—

Case 1

Cause

LUD1 sensor trouble, 
disconnection of harness 
among the PCU PWB, the 
lift-up unit, and the paper 
feed unit. 

Check & 
Remedy

Check LUD1, its harness, 
and the connector. 

Case 2

Cause

Cassette 1 lift-up motor 
trouble

Check & 
Remedy

Check the lift-up unit.