MX-LCX3N (serv.man8). Service Manuals - Sharp Copying Equipment Service Manual (repair manual). Page 21

MX-LCX3N  SELF DIAG MESSAGE AND TROUBLE CODE  10 – 2

 

 

 

 

 

 

 

U6

09

Lift motor trouble

LCC

When the tray is working

Check connection.

20

Communication trouble

LCC

LCC communication

Turn OFF/ON the power.

21

Transport motor trouble

LCC

Paper feed

Check connection.

22

24V trouble

LCC

Power ON

Check connection.

23

Tray descending trouble

LCC

When the tray is working

Check connection.

24

Tray lock trouble

LCC

When the tray is working

Check connection.

51

LCC incompatibility trouble

LCC

Power ON

Check connection.

Trouble content

• The encoder input value is not changed in 

0.2sec (1st time)/0.5sec (2nd time and later) 
after rotation of the motor.

• The motor is rotated for 48sec or more.

Section

PCU

Case 1

Cause

Sensor trouble, LCC control PWB trouble, gear 
breakage, lift motor trouble

Check 
and 
Remedy

Use SIM4-2 and 4-3 to check the operation of the 
sensor and the lift motor. Use SIM15 to cancel the 
trouble.

Trouble content

LCC communication error. Communication line test 
error after turning ON the power or canceling the 
exclusive simulation. LCC and machine model 
codes discrepancy error

Section

PCU

Case 1

Cause

Connector and harness connection trouble or 
disconnection, LCC control PWB trouble, control 
(PCU) PWB trouble, malfunction due to electrical 
noises

Check 
and 
Remedy

Turn OFF/ON the power to cancel the trouble. 
Check the connector and the harness of the 
communication line.

Trouble content

After passing 1 sec from turning ON the motor, the 
lock state of the motor lock signal is detected 
continuously for 1 sec.

Section

PCU

Case 1

Cause

Motor lock, motor RPM abnormality, an overcurrent 
to the motor, LCC control PWB trouble

Check 
and 
Remedy

Use SIM4-3 to check the operation of the transport 
motor.

Trouble content

DC24V power is not supplied to LCC.

Section

PCU

Case 1

Cause

Connector and harness connection trouble or 
disconnection, LCC control PWB trouble, power 
unit trouble

Check 
and 
Remedy

Check the connector and the harness of the power 
line. Check that the power unit and the LCC control 
PWB is of 24V.

Trouble content

Reverse winding of the LCC tray wire is detected.

Section

PCU

Case 1

Cause

Reverse winding of the wire

Check 
and 
Remedy

Check the wire.

Case 2

Cause

Connector and harness connection trouble

Check 
and 
Remedy

Check connection of the connector and the 
harness.

Case 3

Cause

Reverse winding detection SW-ON, reverse 
winding detection SW trouble, LCC control PWB 
trouble

Check 
and 
Remedy

Replace the reverse winding SW and the LCC 
control PWB.

Trouble content

Malfunction of the LCC tray lock mechanism is 
detected.

Section

PCU

Case 1

Cause

Tray lock mechanism trouble

Check 
and 
Remedy

Check the tray lock mechanism.

Case 2

Cause

Connector and harness connection trouble

Check 
and 
Remedy

Check connection of the connector and the 
harness.

Case 3

Cause

Tray lock detection sensor trouble, LCC control 
PWB trouble

Check 
and 
Remedy

Replace the tray lock detection sensor and the 
LCC control PWB.

Trouble content

Detection of incompatible LCC connection.

Section

PCU

Case 1

Cause

Connection of incompatible LCC, is detected.

Check 
and 
Remedy

Install compatible LCC.