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Trouble code

Description

Main
code

Sub

code

H4

00

…

HL1

01

…

HL2

Content Too cold fusing section

Detail

The temperature does not reach the
preset value within the specified time (3
min. in usual modes; 5 min. in curl
correction mode.) after the power relay is
turned on.

Cause

Thermister defective
Heater lamp defective
Control PWB defective
Thermostat defective
AC power supply defective
Interlock switch defective

Check
and
remedy

Check heater lamp for blinking with
SIM5-2.
If lamp blinks properly:
  Check thermister and its harness.
  Check thermister input circuit of control
PWB.
If lamp does not light:
  Check heater lamp for broken wire and
thermostat for operation.
  Check interlock switch.
  Check lamp control circuit of AC PWB
and control PWB.
Clear the trouble with SIM14.

H5

01

Content 3 continuous POD1 not-reaching JAM

detection

Detail

3 continuous POD1 not-reaching JAM
detection

Cause

Check that the fusing JAM is completely
cancelled. (Jam paper may be
remained.)
POD1 sensor trouble or improper
harness connection
Improper installation of the fusing
harness.

Check
and
remedy

Check JAM paper in the fusing section.
(Winding, etc.)
Check POD1 sensor harness. Check the
fusing unit installation.
Cancel the trouble with SIM 14.

L1

00

Content Scanner field trouble

Detail

Scanner field is not finished within the
specified time. (timer is change by
magnification)

Cause

Mirror unit defective
Scanner wire disconnected

Check
and
remedy

Check scanning operation with SIM1-1.

L3

00

Content Scanner return trouble

Detail

Scanner return is not finished within the
specified time. (timer is change by
magnification)

Cause

Mirror unit defective
Scanner wire disconnected

Check
and
remedy

Check scanning operation with SIM1-1.

Trouble code

Description

Main
code

Sub

code

L4

01

Content Main motor lock detected

Detail

Motor lock signal is detected for 1.5
seconds during main motor rotation

Cause

Main motor defective
Improper connection of harness between
PCU PWB and main motor
Control circuit defective

Check
and
remedy

Check main motor operation with
SIM25-1.
Check harness and connector between
PCU PWB and main motor.

L6

10

Content Polygon motor lock detected

Detail

It was judged that there is no output of
polygon motor lock signal of LSU.
The lock signal was checked at about
10-second intervals after the polygon
motor started rotating. As result, it was
judged that the polygon motor failed to
operate normally.

Cause

Disconnected connecter to LSU or
detached harness inside LSU or broken
wire.
Polygon motor defective

Check
and
remedy

Check polygon motor operation with
SIM61-1.
Check harness and connector for
connection. Replace LSU if needed.

L8

01

Content No full-wave signal

Detail

Full-wave signal is not detected.

Cause

PCU PWB trouble
Power unit trouble

Check
and
remedy

Check connection of the harness and the
connector.
Replace the PCU PWB. 
Replace the power unit.

02

Content Full-wave signal abnormality

Detai

Full-wave signal frequency abnormality
detected.
(The detected frequency: 69Hz or above
or 42.5Hz or below)

Cause

Check for disconnection or improper
connection of the connector of the PCU
PWB and the power PWB harness.
PCU PWB trouble
Power unit trouble

Check
and
remedy

Check connection of the harness and
connector.
Replace the power unit.

11 – 5

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.

11 – 6

Trouble code

Description

Main
code

Sub

code

U6

01 

∼

 02

Content Desk 1, 2 CS lift-up trouble

Detail

Desk cassette lift-up trouble (1st - 3rd
cassettes).

Cause

Defective sensor
RADF control PWB defective
Broken gear
Lift-up motor defective

Check
and
remedy

Check lift-up sensor detection with
SIM4-2.
Check lift-up motor with SIM4-3.

08

Content Desk 24-V power supply error

Detail

No supply of DC24V to desk

Cause

Improper connection or broken wire of
connector or harness
Desk control PWB defective
Power supply unit defective

Check
and
remedy

Check power supply line connector and
harness.
Check 24-V voltage on power supply unit
and desk control PWB.

09

Content LCC lift motor trouble

Detail

LCC lift motor trouble

Cause

Sensor trouble
LCC control PWB trouble
Gear breakage
Lift motor trouble

Check
and
remedy

Check the sensor detection with SIM 4-2.
Check the lift motor operation with SIM
4-3.

10

Content Desk transport motor trouble

Detail

Desk transport motor operation trouble

Cause

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

Check
and
remedy

Check transport motor operation with
SIM4-6.

20

Content LCC communication trouble

Detail

LCC communication trouble
Error when power is turned on or in
communication line test after exiting SIM.

Cause

Connector harness improper connection
or disconnection
LCC control PWB trouble
Control PWB (PCU) trouble
Malfunction by noise

Check
and
remedy

Canceled by turning on the power.
Check the connector and harness of the
communication line.

21

Content LCC transport motor trouble

Detail

LCC transport motor operation trouble

Cause

Motor lock
Motor rpm abnormality
Motor overcurrent
LCC control PWB trouble

Check
and
remedy

Check the transport motor operation with
SIM 4-3.

Trouble code

Description

Main
code

Sub

code

U6

22

Content LCC 24V power abnormality

Detail

DC24V not supplied to LCC

Cause

Connector harness improper connection
or disconnection
LCC control PWB trouble
Power unit trouble

Check
and
remedy

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

U7

00

Content RIC communication trouble

Detail

RIC communication error
Error when the power is turned on or in
communication test after exiting from
SIM.

Cause

Connector harness improper connection
or disconnection
RIC control PWB (ICU) trouble
Malfunction by noise

Check
and
remedy

Canceled by turning on the power.
Check the connector and harness of the
power line.

PF

00

Content RIC copy inhibition signal received

Detail

Copy inhibition command received from
RIC (host)

Cause

Judged by the host.

Check
and
remedy

Notice to the host

EE

EL

Content Auto developing tone adjustment trouble

(overtoner error)

Detail

A sample data is less than 0 when auto
developing adjustment is executed.

Cause

Toner density sensor defective
Charging voltage or developing voltage
improper.
Toner density improper
Developing unit defective
PCU PWB defective

Check
and
remedy

Make auto developing adjustment with
SIM25-2.

EU

Content Auto developing adjustment trouble

(undertoner error)

Detail

A sample data is less than 99 when auto
developing adjustment is executed.

Cause

Toner density sensor defective
Charging voltage or developing voltage
improper
Toner density improper
Unit defective
PCU PWB defective

Check
and
remedy

Make auto developing adjustment with
SIM25-2.

PF

00

Content RIC copy inhibition signal received

Detail

Copy inhibition command received from
the host (RIC)

Cause

Judged by the host

Check
and
remedy

Notice to the host

11 – 7

Trouble code

Description

Main
code

Sub

code

U9
E7

F9

00

Content U9–

: ICU-OPE communication

trouble (ICU detection)
E7–

: ICU-PCU communication

trouble (ICU detection)
F9–

: ICU-PRT communication

trouble (ICU detection)

Detail

Communication setup error,
framing/parity/protocol error

Cause

Slave unit PWB connector improper
connection
Slave unit PWB – ICU PWB harness
trouble
Connector pin breakage of the motor
PWB of the slave unit PWB
Slave unit ROM trouble. no ROM, ROM
reverse insertion, ROM pin breakage

Check
and
remedy

Connect the connector of the slave unit
PWB and the ICU PWB.
Check the connection and the harness.
Check the grounding of the copier.
Check the ROM of the slave unit PWB.

90

Content U9–

: ICU-OPE communication

trouble (OPE detection)
E7–

: ICU-PCU communication

trouble (PCU detection)
F9–

: ICU-PRT communication

trouble (PRT detection)

Detail

Communication setup
error/framing/parity/protocol error

Cause

Slave unit PWB connector improper
connection
Slave unit PWB – ICU PWB harness
trouble
Slave unit PWB mother board connector
pin breakage

Check
and
remedy

Check the slave unit PWB and the ICU
PWB connector connection and
connection.
Check the copier earth.

F9

01

Content PRT DRAM trouble

Detail

Option printer PWB DRAM trouble
(Check when turning on the power.)

Cause

DRAM module is broken and access
cannot be made.
DRAM module improper installation

Check
and
remedy

Check with SIM 67-1.

U2

00

Content EEPROM read/write error

Detail

EEPRO version error. Error in writing into
EEPROM.

Cause

EEPROM defective
Uninitialized EEPROM is installed
Defective EEPROM access circuit on
PCU PWB

Check
and
remedy

Check EEPROM for proper set-up
To prevent the erasion of counter data
and adjustment values, write down the
counter data and adjustment values by
simulation. (If there is a printer option,
execute SIM23-1 and note counter
data/adjustment values.)
Clear U2 trouble with SIM16.
Replace PCU PWB.

Trouble code

Description

Main
code

Sub

code

U2

11

Content Counter checksum error

Detail

Checksum error in counter data area

Cause

EEPROM defective
Control circuit hung up due to noise
Defective EEPROM access circuit on
PCU PWB

Check
and
remedy

Check EEPROM for proper set-up
To prevent the erasion of counter data
and adjustment values, write down the
counter data and adjustment values by
simulation. (If there is a printer option,
execute SIM23-1 and note counter
data/adjustment values.)
Clear U2 trouble with SIM16.
Replace PCU PWB.

12

Content Adjustment value checksum error

Detail

Checksum error in adjustment value data
area

Cause

EEPROM defective
Control circuit hung up due to noise.
Defective EEPROM access circuit on
PCU PWB

Check
and
remedy

Check EEPROM for proper set-up
To prevent the erasion of counter data
and adjustment values, write down the
counter data and adjustment values by
simulation. (If there is a printer option,
execute SIM23-1 and note counter
data/adjustment values.)
Clear U2 trouble with SIM16.
Replace PCU PWB.

11 – 8