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AR-C170M  TROUBLESHOOTING  11 - 25

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EEPROM (ICU) check sum 
error

Section

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Case 1

Cause

EEPROM trouble

Check & 
Remedy

1. Check that the EEPROM 

is properly set.

2. Use SIM 16 to cancel the 

error.

Case 2

Cause

Control circuit freeze by 
noises.
ICU PWB EEPROM access 
circuit trouble.

Check & 
Remedy

1. To prevent against 

deletion of the counter 
data and the adjustment 
data, record them with 
the simulation. (When a 
printer option is installed, 
use SIM 22-1 to record 
the counter data and the 
adjustment data.)

2. Replace the ICU PWB.
3. Use SIM 16 to cancel the 

error.

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FAX backup SRAM 
memory check sum error

Section

FAX

Case 1

Cause

SRAM trouble

Check & 
Remedy

Initialize the one-touch dial 
and the FAX soft switch 
registered in the SRAM. 
Cancel the trouble with SIM 
16.

Case 2

Cause

Control circuit freeze by 
noises.
Access circuit trouble.

Check & 
Remedy

Replace the FAX PWB. Use 
SIM 16 to cancel the error.

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The production No. 
recorded in the PCU differs 
from that recorded in the 
ICU.

Section

—

Case 1

Cause

EEPROM is not exchanged 
when replacing the PCU/
ICU PWB.

Check & 
Remedy

Check that the EEPROM is 
properly installed. When 
replacement, check that the 
EEPROM before 
replacement is inserted to 
the board after 
replacement.

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EEPROM version error
EEPROM write error

Section

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Case 1

Cause

EEPROM trouble, Insertion 
of EEPROM which is not 
initialized or defective.

Check & 
Remedy

1. Check that the EEPROM 

is properly inserted.

2. Use SIM 16 to cancel the 

error.

Case 2

Cause

SCN PWB EEPROM 
access circuit trouble

Check & 
Remedy

1. To prevent against 

deletion of the counter 
data and the adjustment 
data, record them with 
the simulation. (When a 
printer option is installed, 
use SIM 22-1 to record 
the counter data and the 
adjustment data.)

2. Replace the SCN PWB.
3. Use SIM 16 to cancel the 

error.

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EEPROM (SCN) check sum 
error

Section

—

Case 1

Cause

EEPROM trouble

Check & 
Remedy

1. Check that the EEPROM 

is properly inserted.

2. Use SIM 16 to cancel the 

error.

Case 2

Cause

SCN PWB EEPROM 
access circuit trouble

Check & 
Remedy

1. To prevent against 

deletion of the counter 
data and the adjustment 
data, record them with 
the simulation. (When a 
printer option is installed, 
use SIM 22-1 to record 
the counter data and the 
adjustment data.)

2. Replace the SCN PWB.
3. Use SIM 16 to cancel the 

error.

AR-C170M  TROUBLESHOOTING  11 - 26

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EEPROM version error
EEPROM write error

Section

—

Case 1

Cause

EEPROM trouble,
Insertion of EEPROM which 
is not initialized or defective.

Check & 
Remedy

1. Check that the EEPROM 

is properly inserted.

2. Use SIM 16 to cancel the 

error.

Case 2

Cause

PCU PWB EEPROM 
access circuit trouble

Check & 
Remedy

1. To prevent against 

deletion of the counter 
data and the adjustment 
data, record them with 
the simulation. (When a 
printer option is installed, 
use SIM 22-1 to record 
the counter data and the 
adjustment data.)

2. Replace the PCU PWB.
3. Use SIM 16 to cancel the 

error.

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EEPROM (PCU) check sum 
error

Section

—

Case 1

Cause

EEPROM trouble

Check & 
Remedy

1. Check that the EEPROM 

is properly inserted.

2. Use SIM 16 to cancel the 

error.

Case 2

Cause

Control circuit freeze 
caused by noises, PCU 
PWB EEPROM access 
circuit trouble

Check & 
Remedy

1. To prevent against 

deletion of the counter 
data and the adjustment 
data, record them with 
the simulation. (When a 
printer option is installed, 
use SIM 22-1 to record 
the counter data and the 
adjustment data.)

2. Replace the PCU PWB.
3. Use SIM 16 to cancel the 

error.

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The alignment plate does 
not move from the home 
position within 1sec when it 
must move. Return to the 
home position is not 
detected for 5sec or more.

Section

ADU

Case 1

Cause

Home position sensor 
trouble

Check & 
Remedy

Use SIM 9-2 to detect the 
home position sensor.

Case 2

Cause

Alignment plate shift motor 
trouble

Check & 
Remedy

Use SIM 9-4 to check the 
alignment plate operation.

Case 3

Cause

Disconnection of the 
harness between the ADU 
control PWB and the motor 
sensor.

Check & 
Remedy

Check connection of the 
harness between the ADU 
control PWB and the motor 
sensor.

Case 4

Cause

Alignment plate operation 
belt, gear breakage or 
improper adjustment

Check & 
Remedy

Remove the ADU, and 
check for breakage of the 
gear and the belt.

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Desk communication error, 
communication test error 
when turning on the power 
or after canceling the 
exclusive simulation.

Section

Desk

Case 1

Cause

Improper connection or 
disconnection of the 
connector and the harness.

Check & 
Remedy

Check the connector and 
the harness in the 
communication line.
Turn OFF/ON the power to 
cancel the error.

Case 2

Cause

Desk control PWB trouble, 
control PWB (PCU) trouble, 
malfunction caused by 
noises

Check & 
Remedy

Turn OFF/ON the power to 
cancel the error.

AR-C170M  TROUBLESHOOTING  11 - 27

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DLUD1 does not turn on 
within the specified time.

Section

Desk

Case 1

Cause

DLUD1 sensor trouble, 
paper feed unit harness 
disconnection

Check & 
Remedy

Check DLUD1 and the 
harness and the connector.

Case 2

Cause

Cassette 1 lift-up motor 
trouble, desk PWB, lift-up 
unit trouble

Check & 
Remedy

Check the lift-up unit.

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DLUD2 does not turn on 
within the specified time.

Section

Desk

Case 1

Cause

DLUD2 sensor trouble, 
paper feed unit harness 
disconnection

Check & 
Remedy

Check DLUD2 and the 
harness and the connector.

Case 2

Cause

Desk cassette 2 lift-up 
motor trouble, desk PWB, 
lift-up unit trouble

Check & 
Remedy

Check the lift-up unit.

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DLUD3 does not turn on 
within the specified time.

Section

Desk

Case 1

Cause

DLUD3 sensor trouble, 
paper feed unit harness 
disconnection

Check & 
Remedy

Check DLUD3 and the 
harness and the connector.

Case 2

Cause

Desk cassette 3 lift-up 
motor trouble, desk PWB, 
lift-up unit trouble

Check & 
Remedy

Check the lift-up unit.

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• The encoder input value 

does not change in 
0.13sec (first time)/0.5sec 
(second time or later) 
after rotation of the motor.

• The motor is rotated for 

18sec or more.

• The encoder changes 

after the specified time 
from termination of the 
motor. (2sec and 10 
counts or more)

Section

LCC

Common

Check

Use SIM 4-2 and 4-3 to 
check the sensor operation 
and the lift motor operation.
Cancel the trouble with SIM 
15.

Case 1

Cause

Sensor trouble

Check & 
Remedy

Replace the sensor.

Case 2

Cause

LCC control PWB trouble

Check & 
Remedy

Replace the LCC control 
PWB.

Case 3

Cause

Gear breakage

Check & 
Remedy

Replace the gear.

Case 4

Cause

Lift motor trouble

Check & 
Remedy

Replace the lift motor.

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Desk transport motor 
operation trouble

Section

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Case 1

Cause

Motor lock, motor RPM 
abnormality, Over current to 
the motor, saddle finisher 
control PWB trouble

Check & 
Remedy

Use SIM 4-3 to check the 
desk transport motor 
operation.

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Communication error with 
the LCC.
Communication line test 
error after turning on the 
power or canceling an 
exclusive simulation.
Discrepancy of the model 
code between the LCC and 
the machine.

Section

—

Common Turn OFF/ON the power to 

cancel the error.

AR-C170M  TROUBLESHOOTING  11 - 28

Case 1

Cause

Improper connection or 
disconnection of the 
connector and the harness.

Check & 
Remedy

Check the connector and 
the harness in the 
communication line.

Case 2

Cause

LCC control PWB trouble

Check & 
Remedy

Replace the LCC control 
PWB.

Case 3

Cause

Control PWB (PCU) trouble

Check & 
Remedy

Replace the control PWB 
(PCU).

Case 4

Cause

Malfunction caused by 
noises

Check & 
Remedy

Turn OFF/ON the power to 
cancel the error.

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• The encoder input value 

does not change in 
0.06sec after turning on 
the motor.

• The encoder input 

changes after the speci-
fied time from turning off 
the motor. (100 or more 
counts are made in 
0.1sec after 5sec.)

Section

—

Case 1

Cause

Motor lock, motor RPM 
abnormality. Over current to 
the motor, saddle finisher 
control PWB trouble

Check & 
Remedy

Use SIM 4-3 to check the 
transport motor operation.

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DC 24V is not supplied to 
the LCC.

Section

—

Case 1

Cause

Improper connection or 
disconnection of the 
connector and the harness.

Check & 
Remedy

Check the connector and 
the harness in the power 
line.
Turn OFF/ON the power to 
cancel the error.

Case 2

Cause

LCC control PWB trouble

Check & 
Remedy

Turn OFF/ON the power to 
cancel the error.

Case 3

Cause

Power supply unit trouble

Check & 
Remedy

Turn OFF/ON the power to 
cancel the error.

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Connection of a desk which 
is not compatible with the 
AR-C170M is detected.

Section

Desk

Case 1

Cause

Connection of a desk (AR-
D17/AR-D18/AR-D19) 
which is not compatible with 
the AR-C170M is detected.

Check & 
Remedy

Connect the AR-D18N/AR-
D19N.

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Connection of LCC which is 
not compatible with the AR-
C170M is detected.

Section

LCC

Case 1

Cause

Connection of the AR-LC5 
which is not compatible with 
the AR-C170M is detected.

Check & 
Remedy

Connect the AR-LC8.

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RIC communication error, 
communication test error 
when turning on the power 
or after canceling the 
exclusive simulation.

Section

RIC

Case 1

Cause

Improper connection or 
disconnection of the 
connector and the harness.
RIC control PWB trouble, 
control PWB (PCU) trouble, 
malfunction caused by 
noises.

Check & 
Remedy

Turn OFF/ON the power to 
cancel the error.
Check the connector and 
the harness in the 
communication line.

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Access abnormality to CPT-
ASIC (ASIC does not 
operate normally.)

Section

MFP PWB

Case 1

Cause

CPT-ASIC abnormality
MFP PWB abnormality

Check & 
Remedy

Turn OFF/ON repeatedly. If 
the trouble is not canceled, 
replace the MFP PWB.