MX-DEX8, MX-DEX9. Complete - Sharp Copying Equipment Service Manual (repair manual). Page 22

MX-DEX8/DEX9  SELF-DIAGNOSIS AND TROUBLE CODES  8 – 3

 

 

 

 

 

U6

00

Desk communication trouble

Desk

Desk communication is made.

Turn OFF and back ON the power.

01

Desk tray 1 lift-up motor trouble

Desk

Tray is being lifted.

Check connections, etc.

02

Desk tray 2 lift-up motor trouble

Desk

Tray is being lifted.

Check connections, etc.

10

Desk transport motor trouble

Desk

Paper is fed.

Check connections, etc.

50

Desk incompatibility trouble

Desk

The power is turned ON.

Check connections, etc.

Content

Desk communication trouble

Description

Communication error with the desk;  communication line test 
error after turning on the power or canceling an exclusive 
SIM.

Case 1

Cause

Defective connection or disconnection of 
connector and harness

Check and 
Remedy

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

Case 2

Cause

Desk control PWB failure
Control PWB (PCU) failure

Check and 
Remedy

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

Case 3

Cause

Malfunction caused by electrical noise

Check and 
Remedy

Cancel by turning OFF/ON the power.

Content

Desk tray 1 lift-up motor trouble

Description

Desk tray 1 lift-up operation failure

Case 1

Cause

Defective connection or disconnection of 
connector and harness

Check and 
Remedy

Check the connectors and the harnesses of 
the desk control PWB, lift motor line, and paper 
feed unit 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 DLUM1 and check the 
operation of the single unit.  Check for intrusion 
of any foreign material in the drive system.

Case 3

Cause

Desk control PWB failure, desk tray 1 lift motor 
failure, DLUD1 sensor failure. 

Check and 
Remedy

Replace the desk control PWB, desk tray 1 lift 
motor, or  DLUD1 sensor.

Content

Desk tray 2 lift-up motor trouble

Description

Desk tray 2 lift-up operation failure

Case 1

Cause

Defective connection or disconnection of 
connector and harness

Check and 
Remedy

Check the connectors and the harnesses of 
the desk control PWB, lift motor line, and 
paper feed unit 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 DLUM2 and check the 
operation of the single unit.  Check for 
intrusion of any foreign material in the drive 
system.

Case 3

Cause

Desk control PWB failure, desk tray 2 lift motor 
failure, DLUD2 sensor failure

Check and 
Remedy

Replace the desk control PWB, desk tray 2 lift 
motor, or  DLUD2 sensor. 

Content

Desk transport motor trouble

Description

Desk transport motor operation failure

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 DPFM and check the 
operation of the single unit.  Check for 
intrusion of any foreign material in the drive 
system.

Case 3

Cause

Desk control PWB failure, transport motor 
failure

Check and 
Remedy

Replace the desk control PWB or the transport 
motor.

Content

Desk incompatibility trouble

Description

User attempted to connect a desk incompatible with MX-
DEX8/DEX9. 

Case 1

Cause

User attempted to connect an MX-DEX8/
DEX9-incompatible desk such as MX-DEX3/
DEX4.

Check and 
Remedy

Connect MX-DEX8/DEX9.