AR-LC6 (serv.man2). Service manual - Sharp Copying Equipment Service Manual (repair manual). Page 15

AR-LC6  TROUBLESHOOTING  7 - 2

No.

MAIN 

CODE

SUB 

CODE

Title (Content)

Section

Operation mode

Countermeasure (Remedy)

Note

1

U6

09

Lift motor trouble

LCC

Tray lift-up

Check connection.

2

20

Communication trouble

LCC

LCC communication

Turn OFF/ON the power.

3

21

Transport motor trouble

LCC

Paper feed

Check connection.

4

22

24V trouble

LCC

Power ON

Check connection.

Main

Sub

Title

Display

Message

Phenomenon

Detail

LCC lift motor operation 
trouble. Tray lift-up trouble

Section

LCC

Case 1

Cause

Defective connection or 
disconnection of connector 
and harness

Check 
and 
Remedy

Check the connector and 
the harness in the motor 
line. Connect the connector 
properly. Replace the 
harness.

Case 2

Cause

Motor lock, motor rpm 
abnormality, motor 
overcurrent, LRE trouble, 
intrusion of foreign material

Check 
and 
Remedy

Use SIM 4-2 to select LRE 
and check the operation of 
the single unit. Use SIM 4-3 
to select LLM and check the 
operation of the single unit. 
Check for intrusion of any 
foreign material in the drive 
system.

Case 3

Cause

LC main PWB trouble, lift 
motor trouble

Check 
and 
Remedy

Replace the LCC main PWB 
or the lift motor.

Main

Sub Title

Display

Message

Phenomenon

Detail

Communication error with 
LCC, communication line 
test error after turning on the 
power or canceling an 
exclusive simulation.

Section

LCC

Case 1

Cause

Defective connection or 
disconnection of connector 
and harness

Check 
and 
Remedy

Check the connector and 
the harness of the 
communication line. 
Connect the connector 
properly. Replace the 
harness.

Case 2

Cause

LCC main PWB trouble, 
control PWB (PCU) trouble

Check 
and 
Remedy

Replace the LCC PWB. 
Replace the control PWB 
(PCU). 

Case 3

Cause

Malfunction caused by 
noises

Check 
and 
Remedy

Cancel by turning OFF/ON 
the power.

Main

Sub Title

Display

Message

Phenomenon

Detail

LCC transport motor 
operation trouble

Section

LCC

Case 1

Cause

Defective connection or 
disconnection of connector 
and harness

Check 
and 
Remedy

Check the connector and 
the harness in the motor 
line. Connect the connector 
properly. Replace the 
harness.

Case 2

Cause

Motor lock, motor rpm 
abnormality, motor 
overcurrent, intrusion of 
foreign material

Check 
and 
Remedy

Use SIM 4-3 to select LTM 
and check the operation of 
the single unit. Check for 
intrusion of any foreign 
material in the drive system.

Case 3

Cause

LCC main PWB trouble, 
transport motor trouble

Check 
and 
Remedy

Replace the LCC main PWB 
or the transport motor.

Main

Sub Title

Display

Message

Phenomenon

Detail

24V supply for LCC is cut 
off.

Section

LCC

Case 1

Cause

Defective connection or 
disconnection of connector 
and harness

Check 
and 
Remedy

Check the connector and 
the harness which connect 
LCC and the main unit. 
Connect the connector 
properly. Replace the 
harness.

Case 2

Cause

Power source fuse blown-off

Check 
and 
Remedy

Check for short circuit 
between 24V and GND. 
Check for pinched harness 
and the LCC main PWB 
trouble. Replace the fuse, 
the harness, and the LCC 
main PWB.

Case 3

Cause

Power source abnormality in 
the main unit

Check 
and 
Remedy

Check 24V output on the 
main unit side.