Sharp MX-DEX1 (serv.man11) Service Manual ▷ View online
MX-DEX1/DEX2 SELF-DIAGNOSIS AND TROUBLE CODES 9 – 3
3. Trouble Code List
4. Trouble Code Details
U6-00 Desk communication trouble
U6-01 Desk tray 1 lift-up motor trouble
U6-02 Desk tray 2 lift-up motor trouble
U6-10 Desk transport motor trouble
U6-50 Desk incompatibility trouble
Main
code
code
Sub
code
Description
Section
Can occur when
Solution
Remarks
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.
error after turning on the power or canceling an exclusive
SIM.
Case 1
Cause
Defective connection or disconnection of
connector and harness
connector and harness
Check and
Remedy
Remedy
Check the connector and the harness in the
communication line. Connect the connector
properly.
Replace the harness.
communication line. Connect the connector
properly.
Replace the harness.
Case 2
Cause
Desk control PWB failure
Control PWB (PCU) failure
Control PWB (PCU) failure
Check and
Remedy
Remedy
Replace the desk control PWB. Replace the
control PWB (PCU).
control PWB (PCU).
Case 3
Cause
Malfunction caused by electrical noise
Check and
Remedy
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
connector and harness
Check and
Remedy
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.
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
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Case 3
Cause
Desk control PWB failure, desk tray 1 lift motor
failure, DLUD1 sensor failure.
failure, DLUD1 sensor failure.
Check and
Remedy
Remedy
Replace the desk control PWB, desk tray 1 lift
motor, or DLUD1 sensor.
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
connector and harness
Check and
Remedy
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.
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
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Case 3
Cause
Desk control PWB failure, desk tray 2 lift motor
failure, DLUD2 sensor failure
failure, DLUD2 sensor failure
Check and
Remedy
Remedy
Replace the desk control PWB, desk tray 2 lift
motor, or DLUD2 sensor.
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
connector and harness
Check and
Remedy
Remedy
Check the connector and the harness in the
motor line.
Connect the connector properly. Replace the
harness.
motor line.
Connect the connector properly. Replace the
harness.
Case 2
Cause
Motor lock, motor rpm abnormality, motor
overcurrent, intrusion of foreign material
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Case 3
Cause
Desk control PWB failure, transport motor
failure
failure
Check and
Remedy
Remedy
Replace the desk control PWB or the transport
motor.
motor.
Content
Desk incompatibility trouble
Description
User attempted to connect a desk incompatible with MX-
DEX1/DEX2.
DEX1/DEX2.
Case 1
Cause
User attempted to connect an MX-DEX1/
DEX2-incompatible desk such as MX-DEX3/
DEX4.
DEX2-incompatible desk such as MX-DEX3/
DEX4.
Check and
Remedy
Remedy
Connect MX-DEX1/DEX2.
MX-DEX1/DEX2 SELF-DIAGNOSIS AND TROUBLE CODES 9 – 3
3. Trouble Code List
4. Trouble Code Details
U6-00 Desk communication trouble
U6-01 Desk tray 1 lift-up motor trouble
U6-02 Desk tray 2 lift-up motor trouble
U6-10 Desk transport motor trouble
U6-50 Desk incompatibility trouble
Main
code
code
Sub
code
Description
Section
Can occur when
Solution
Remarks
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.
error after turning on the power or canceling an exclusive
SIM.
Case 1
Cause
Defective connection or disconnection of
connector and harness
connector and harness
Check and
Remedy
Remedy
Check the connector and the harness in the
communication line. Connect the connector
properly.
Replace the harness.
communication line. Connect the connector
properly.
Replace the harness.
Case 2
Cause
Desk control PWB failure
Control PWB (PCU) failure
Control PWB (PCU) failure
Check and
Remedy
Remedy
Replace the desk control PWB. Replace the
control PWB (PCU).
control PWB (PCU).
Case 3
Cause
Malfunction caused by electrical noise
Check and
Remedy
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
connector and harness
Check and
Remedy
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.
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
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Case 3
Cause
Desk control PWB failure, desk tray 1 lift motor
failure, DLUD1 sensor failure.
failure, DLUD1 sensor failure.
Check and
Remedy
Remedy
Replace the desk control PWB, desk tray 1 lift
motor, or DLUD1 sensor.
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
connector and harness
Check and
Remedy
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.
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
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Case 3
Cause
Desk control PWB failure, desk tray 2 lift motor
failure, DLUD2 sensor failure
failure, DLUD2 sensor failure
Check and
Remedy
Remedy
Replace the desk control PWB, desk tray 2 lift
motor, or DLUD2 sensor.
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
connector and harness
Check and
Remedy
Remedy
Check the connector and the harness in the
motor line.
Connect the connector properly. Replace the
harness.
motor line.
Connect the connector properly. Replace the
harness.
Case 2
Cause
Motor lock, motor rpm abnormality, motor
overcurrent, intrusion of foreign material
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Case 3
Cause
Desk control PWB failure, transport motor
failure
failure
Check and
Remedy
Remedy
Replace the desk control PWB or the transport
motor.
motor.
Content
Desk incompatibility trouble
Description
User attempted to connect a desk incompatible with MX-
DEX1/DEX2.
DEX1/DEX2.
Case 1
Cause
User attempted to connect an MX-DEX1/
DEX2-incompatible desk such as MX-DEX3/
DEX4.
DEX2-incompatible desk such as MX-DEX3/
DEX4.
Check and
Remedy
Remedy
Connect MX-DEX1/DEX2.
MX-DEX1/DEX2 SELF-DIAGNOSIS AND TROUBLE CODES 9 – 3
3. Trouble Code List
4. Trouble Code Details
U6-00 Desk communication trouble
U6-01 Desk tray 1 lift-up motor trouble
U6-02 Desk tray 2 lift-up motor trouble
U6-10 Desk transport motor trouble
U6-50 Desk incompatibility trouble
Main
code
code
Sub
code
Description
Section
Can occur when
Solution
Remarks
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.
error after turning on the power or canceling an exclusive
SIM.
Case 1
Cause
Defective connection or disconnection of
connector and harness
connector and harness
Check and
Remedy
Remedy
Check the connector and the harness in the
communication line. Connect the connector
properly.
Replace the harness.
communication line. Connect the connector
properly.
Replace the harness.
Case 2
Cause
Desk control PWB failure
Control PWB (PCU) failure
Control PWB (PCU) failure
Check and
Remedy
Remedy
Replace the desk control PWB. Replace the
control PWB (PCU).
control PWB (PCU).
Case 3
Cause
Malfunction caused by electrical noise
Check and
Remedy
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
connector and harness
Check and
Remedy
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.
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
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Case 3
Cause
Desk control PWB failure, desk tray 1 lift motor
failure, DLUD1 sensor failure.
failure, DLUD1 sensor failure.
Check and
Remedy
Remedy
Replace the desk control PWB, desk tray 1 lift
motor, or DLUD1 sensor.
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
connector and harness
Check and
Remedy
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.
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
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Case 3
Cause
Desk control PWB failure, desk tray 2 lift motor
failure, DLUD2 sensor failure
failure, DLUD2 sensor failure
Check and
Remedy
Remedy
Replace the desk control PWB, desk tray 2 lift
motor, or DLUD2 sensor.
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
connector and harness
Check and
Remedy
Remedy
Check the connector and the harness in the
motor line.
Connect the connector properly. Replace the
harness.
motor line.
Connect the connector properly. Replace the
harness.
Case 2
Cause
Motor lock, motor rpm abnormality, motor
overcurrent, intrusion of foreign material
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Case 3
Cause
Desk control PWB failure, transport motor
failure
failure
Check and
Remedy
Remedy
Replace the desk control PWB or the transport
motor.
motor.
Content
Desk incompatibility trouble
Description
User attempted to connect a desk incompatible with MX-
DEX1/DEX2.
DEX1/DEX2.
Case 1
Cause
User attempted to connect an MX-DEX1/
DEX2-incompatible desk such as MX-DEX3/
DEX4.
DEX2-incompatible desk such as MX-DEX3/
DEX4.
Check and
Remedy
Remedy
Connect MX-DEX1/DEX2.
MX-DEX1/DEX2 SELF-DIAGNOSIS AND TROUBLE CODES 9 – 3
3. Trouble Code List
4. Trouble Code Details
U6-00 Desk communication trouble
U6-01 Desk tray 1 lift-up motor trouble
U6-02 Desk tray 2 lift-up motor trouble
U6-10 Desk transport motor trouble
U6-50 Desk incompatibility trouble
Main
code
code
Sub
code
Description
Section
Can occur when
Solution
Remarks
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.
error after turning on the power or canceling an exclusive
SIM.
Case 1
Cause
Defective connection or disconnection of
connector and harness
connector and harness
Check and
Remedy
Remedy
Check the connector and the harness in the
communication line. Connect the connector
properly.
Replace the harness.
communication line. Connect the connector
properly.
Replace the harness.
Case 2
Cause
Desk control PWB failure
Control PWB (PCU) failure
Control PWB (PCU) failure
Check and
Remedy
Remedy
Replace the desk control PWB. Replace the
control PWB (PCU).
control PWB (PCU).
Case 3
Cause
Malfunction caused by electrical noise
Check and
Remedy
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
connector and harness
Check and
Remedy
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.
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
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Case 3
Cause
Desk control PWB failure, desk tray 1 lift motor
failure, DLUD1 sensor failure.
failure, DLUD1 sensor failure.
Check and
Remedy
Remedy
Replace the desk control PWB, desk tray 1 lift
motor, or DLUD1 sensor.
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
connector and harness
Check and
Remedy
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.
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
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Case 3
Cause
Desk control PWB failure, desk tray 2 lift motor
failure, DLUD2 sensor failure
failure, DLUD2 sensor failure
Check and
Remedy
Remedy
Replace the desk control PWB, desk tray 2 lift
motor, or DLUD2 sensor.
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
connector and harness
Check and
Remedy
Remedy
Check the connector and the harness in the
motor line.
Connect the connector properly. Replace the
harness.
motor line.
Connect the connector properly. Replace the
harness.
Case 2
Cause
Motor lock, motor rpm abnormality, motor
overcurrent, intrusion of foreign material
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Case 3
Cause
Desk control PWB failure, transport motor
failure
failure
Check and
Remedy
Remedy
Replace the desk control PWB or the transport
motor.
motor.
Content
Desk incompatibility trouble
Description
User attempted to connect a desk incompatible with MX-
DEX1/DEX2.
DEX1/DEX2.
Case 1
Cause
User attempted to connect an MX-DEX1/
DEX2-incompatible desk such as MX-DEX3/
DEX4.
DEX2-incompatible desk such as MX-DEX3/
DEX4.
Check and
Remedy
Remedy
Connect MX-DEX1/DEX2.
Display