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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

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

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

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