AR-335 (serv.man15). AR280 285 335 Service Manual-Trouble Code List - Sharp Copying Equipment Service Manual (repair manual). Page 8

Trouble code

Description

Main
code

Sub

code

U4

02

Content ADU alignment plate operation error

Detail

The plate won’t move from home position
more than 1 second after sending the
command to leave home position. Or the
plate won’t return to home position within
5 seconds after sending the command to
return to home position.

Cause

Home position sensor defective
Alignment shift motor defective
Improper connection of harness between
PCU PWB, motor and sensor.
Control PWB (PCU) defective
Alignment plate driving belt or gear
damaged or improperly adjusted

Check
and
remedy

Check home position sensor detection
with SIM9-2.
Check alignment plate operation with
SIM9-4.
Check connection between PCU, motor
and sensor.
Remove ADU and check gear and belt
for damage.

U5

00

Content RADF/SPF communication trouble

Detail

Communication line test error occurs
when power is turned on or after the exit
of a simulation mode.
Improper communication with RADF

Cause

Improper connection or broken wire of
connector or harness
RADF control PWB defective
Control PWB (PCU) defective
Malfunction due to noise

Check
and
remedy

Check communication line connector and
harness.
Clear the trouble by turning power supply
On/Off.

Trouble code

Description

Main
code

Sub

code

U5

01

Content RADF resist sensor defective

Detail

RADF resist sensor detection trouble

Cause

Sensor defective
Improper connection of sensor harness
inside RADF.
RADF control PWB defective

Check
and
remedy

Check resist sensor detection with
SIM2-2.
Check sensor harness inside RADF.

02

Content RADF eject/inversion sensor defective

Detail

RADF eject/inversion sensor detection
trouble

Cause

Defective sensor
Improper connection of sensor harness
inside RADF.
RADF control PWB defective

Check
and
remedy

Check eject/inversion sensor detection
with SIM2-2.
Check sensor harness inside RADF.

03

Content RADF timing sensor defective

Detail

RADF timing sensor detection trouble

Cause

Defective sensor
Improper connection of sensor harness
inside RADF
RADF control PWB defective

Check
and
remedy

Check timing sensor detection with
SIM2-2.
Check sensor harness inside RADF.

11

Content Paper feed motor operation error

Detail

Paper feed motor driving error

Cause

Motor lock
Improper motor speed
Overcurrent to motor
RADF control PWB defective

Check
and
remedy

Check paper feed motor operation with
SIM2-3,4.

12

Content RADF transport motor operation error

Detail

RADF transport motor driving error

Cause

Motor lock
Improper motor speed
Overcurrent to motor
RADF control PWB defective

Check
and
remedy

Check paper feed motor operation with
SIM2-5,6.

U6

00

Content Desk communication trouble

Detail

Failed communication with desk
Communication line test error occurs
when power is turned on or after the exit
of a simulation mode.

Cause

Improper connection or broken wire of
connector or harness
Desk control PWB defective
Control PWB (PCU) defective
Malfunction due to noise.

Check
and
remedy

Clear the trouble by turning the power
supply On/Off.
Check communication line connector and
harness.

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