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AR-C170M  TROUBLESHOOTING  11 - 9

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Phenomenon Detail

Sensor input value 
abnormality

Section

Saddle finisher

Case 1

Cause

Sensor breakage

Check & 
Remedy

Use SIM 3-2 to check the 
sensor operation.

Case 2

Cause

Harness disconnection

Check & 
Remedy

Same as case 1.

Case 3

Cause

Saddle finisher control PWB 
trouble

Check & 
Remedy

Same as Case 1.

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Writing to the backup RAM 
is started but not completed 
in 250msec.
When writing to the backup 
RAM, if the write data do 
not coincide with the read 
data, writing is performed 
again. However, the write 
data still do not coincide 
with the read data.

Section

Saddle finisher/sorter

Case 1

Cause

Saddle finisher control 
PWB, backup RAM trouble

Check & 
Remedy

Replace the saddle finisher 
control PWB.

Case 2

Cause

Saddle finisher control PWB 
trouble

Check & 
Remedy

Same as Case 1.

Case 3

Cause

Sorter control PWB, backup 
RAM trouble

Check & 
Remedy

Replace the sorter control 
PWB, and perform the bin 
paper sensor sensitivity 
adjustment and the guide 
bar motor oscillation range 
adjustment.

Case 4

Cause

Sorter control PWB trouble

Check & 
Remedy

Same as Case 3.

Case 5

Cause

Malfunction caused by 
noises

Check & 
Remedy

Turn off the machine power, 
and turn it on again.

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Phenomenon Detail

Abnormal transformation of 
punch unit backup RAM 
contents

Section

Saddle finisher

Case 1

Cause

Punch control PWB trouble

Check & 
Remedy

Replace the punch control 
PWB.

Case 2

Cause

Malfunction caused by 
noises

Check & 
Remedy

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Punch dust sensor 
detection trouble

Section

Saddle finisher

Case 1

Cause

Sensor breakage

Check & 
Remedy

Use SIM 3-2 to check the 
sensor operation.

Case 2

Cause

Harness disconnection

Check & 
Remedy

Same as Case 1.

Case  3

Cause

Saddle finisher control PWB 
trouble

Check & 
Remedy

Same as Case 1. 

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Phenomenon Detail

The power disconnection of 
the punch unit is detected.

Section

Saddle finisher

Case 1

Cause

Harness disconnection

Check & 
Remedy

Use SIM 3-3 to check the 
punching operation.

Case 2

Cause

Punch control PWB trouble

Check & 
Remedy

Same as Case 1.

AR-C170M  TROUBLESHOOTING  11 - 10

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Phenomenon Detail

The push bar home position 
signal is not acknowledged 
within 2sec from the start of 
initializing. The home 
position sensor remains ON 
after 20 pulses of shift 
operation of the push bar 
from its home position.

Section

Sorter

Common

Check

Execute SIM 3-2 and 3-3 to 
check the push bar drive 
motor operations and the 
sensor operations.

Case 1

Cause

Push bar motor trouble

Check & 
Remedy

Replace the push bar 
motor.

Case 2

Cause

Push bar home position 
sensor trouble

Check & 
Remedy

Replace the push bar home 
position sensor.

Case 3

Cause

The circuit breaker (CB1) is 
operating.

Check & 
Remedy

Remove the cause for 
operation of the circuit 
breaker, and reset the 
circuit breaker.

Case 4

Cause

There is a mechanical bur 
in the push bar shifting 
path.

Check & 
Remedy

Repair the mechanism to 
remove the bur.

Case 5

Cause

Sorter controller PWB 
trouble

Check & 
Remedy

Replace the sorter 
controller PWB, and 
perform the bin paper 
sensor sensitivity 
adjustment and the guide 
bar motor oscillating range 
adjustment.

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Phenomenon Detail

The lead cam position 
sensor signal is not 
acknowledged within 3.4sec 
(2.4sec) from the bin shift 
motor ON signal. The 
operation is not completed 
within 30sec from the start 
of bin's shift operation to its 
home position. The rotation 
sensor output signal is not 
detected within 0.25sec 
from output of the bin shift 
motor ON signal.

Section

Sorter

Common

Check

Execute SIM 3-2 and 3-3 to 
check the guide bar drive 
motor operations and the 
sensor operations. (Case 1, 
2)
Check the voltage (about 
24V) between J8-1 and J8-
2 on the bin shift motor 
driver PWB at the timing of 
the bin shift motor. (Case 3 
to 5)

Case 1

Cause

Cable trouble between the 
bin shift motor and the 
sorter controller PWB.

Check & 
Remedy

Check and connect the 
cable properly between the 
bin shift motor and the 
sorter controller PWB.

Case 2

Cause

The circuit breaker (CB1) is 
operating.

Check & 
Remedy

Remove the cause for 
operation of the circuit 
breaker, and reset the 
circuit breaker.

Case 3

Cause

Wiring trouble of the bin 
shift motor (M1).

Check & 
Remedy

Correct wiring of the bin 
shift motor.

Case 4

Cause

Bin shift motor trouble

Check & 
Remedy

Replace the bin shift motor.

Case 5

Cause

Sorter controller PWB 
trouble

Check & 
Remedy

Replace the sorter 
controller PWB, and 
perform the bin paper 
sensor sensitivity 
adjustment and the guide 
bar motor oscillating range 
adjustment.

Case 6

Cause

Bin shift mechanism trouble

Check & 
Remedy

Repair the mechanism.

AR-C170M  TROUBLESHOOTING  11 - 11

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Phenomenon Detail

Sensor output abnormality 
when adjusting the sensor 
detection level.

Section

Sorter

Common

Check

Execute SIM 3-2 to check 
the sensor output.

Case 1

Cause

Trouble of the paper sensor 
in the bin.

Check & 
Remedy

Replace the paper sensor in 
the bin.

Case 2

Cause

Sorter controller PWB 
trouble

Check & 
Remedy

Replace the sorter 
controller PWB, and 
perform the sensor 
sensitivity adjustment in the 
bin and the guide bar motor 
oscillation range 
adjustment.

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Process thermistor open

Section

Drum cartridge

Case 1

Cause

Process thermistor trouble

Check & 
Remedy

Replace the process 
thermistor.

Case 2

Cause

Disconnection of the 
process thermistor harness.

Check & 
Remedy

Check connection of the 
connector and the harness 
of the process thermistor.

Case 3

Cause

PCU PWB trouble

Check & 
Remedy

Replace the PCU PWB.

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Phenomenon Detail

Toner empty sensor output 
abnormality

Section

Cartridge

Case 1

Cause

Connector harness trouble, 
connector disconnection

Check & 
Remedy

1. Check connection of the 

toner empty sensor. 

→

 

Connect it properly.

2. Check connection of the 

connector harness to the 
PCU PWB. 

→

 Connect it 

properly.

3. Check connection of the 

cartridge. 

→

 Connect it 

properly.

4. Check for disconnection 

of the harness. 

→

 

Replace the harness.

Case 2

Cause

Cartridge trouble

Check & 
Remedy

Replace the cartridge.

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Toner empty sensor output 
abnormality

Section

Cartridge

Case 1

Cause

Connector harness trouble, 
connector disconnection

Check & 
Remedy

1. Check connection of the 

toner empty sensor. 

→

 

Connect it properly.

2. Check connection of the 

connector harness to the 
PCU PWB. 

→

 Connect it 

properly.

3. Check connection of the 

cartridge. 

→

 Connect it 

properly.

4. Check for disconnection 

of the harness. 

→

 

Replace the harness.

Case 2

Cause

Cartridge trouble

Check & 
Remedy

Replace the cartridge.

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Phenomenon Detail

Toner empty sensor output 
abnormality

Section

Cartridge

Case 1

Cause

Connector harness trouble, 
connector disconnection

Check & 
Remedy

1. Check connection of the 

toner empty sensor. 

→

 

Connect it properly.

2. Check connection of the 

connector harness to the 
PCU PWB. 

→

 Connect it 

properly.

3. Check connection of the 

cartridge. 

→

 Connect it 

properly.

4. Check for disconnection 

of the harness. 

→

 

Replace the harness.

Case 2

Cause

Cartridge trouble

Check & 
Remedy

Replace the cartridge.

AR-C170M  TROUBLESHOOTING  11 - 12

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Phenomenon Detail

Toner empty sensor output 
abnormality

Section

Cartridge

Case 1

Cause

Connector harness trouble, 
connector disconnection

Check & 
Remedy

1. Check connection of the 

toner empty sensor. 

→

 

Connect it properly.

2. Check connection of the 

connector harness to the 
PCU PWB. 

→

 Connect it 

properly.

3. Check connection of the 

cartridge. 

→

 Connect it 

properly.

4. Check for disconnection 

of the harness. 

→

 

Replace the harness.

Case 2

Cause

Cartridge trouble

Check & 
Remedy

Replace the cartridge.

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Phenomenon Detail

Before starting process 
control, the transfer belt 
surface is scanned with the 
image density sensor to 
adjust the sensor gain so 
that the output becomes a 
fixed value. However, when 
the sensor gain is changed, 
the output is not within the 
specified range.

Section

—

Common

Check

Use SIM 44-2 to adjust the 
process control sensor 
gain.

Case 1

Cause

When "Error" occurs in SIM 
44-2:
1. Dirt/defect of the image 

density sensor

2. Disconnection of the 

harness between the 
PCU PWB and the 
image density sensor

3. Calibration plate 

solenoid operation 
trouble

Check & 
Remedy

1. Clean/replace the image 

density sensor.

2. Connect/replace the 

harness between the 
PCU PWB and the 
image density sensor.

3. Replace the calibration 

plate solenoid.

Case 2

Cause

When SIM 44-2 is 
completed:
1. Insufficient cleaning of 

the transfer belt.

Check & 
Remedy

1. Check the transfer belt 

surface.

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Phenomenon Detail

Before starting process 
control, the calibration plate 
surface is scanned with the 
image density sensor to 
adjust the sensor gain so 
that the output becomes a 
fixed value. However, when 
the sensor gain is changed, 
the output is not within the 
specified range.

Section

—

Common

Check 

Use SIM 44-2 to adjust the 
process control sensor 
gain.

Case 1

Cause

When "Error" occurs in SIM 
44-2:
1. Dirt/defect of the image 

density sensor

2. Disconnection of the 

harness between the 
PCU PWB and the 
image density sensor

Check & 
Remedy

1. Clean/replace the image 

density sensor.

2. Connect/replace the 

harness between the 
PCU PWB and the 
image density sensor.

Case 2

Cause

When SIM 44-2 is 
completed:
1. Dirt on the calibration 

plate, calibration plate 
solenoid operation 
trouble

Check & 
Remedy

1. Clean the calibration 

plate. Replace the 
calibration plate 
solenoid.

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Process humidity sensor 
open

Section

Process

Case 1

Cause

Process humidity sensor 
harness disconnection

Check & 
Remedy

Check connection of the 
connector and the harness 
of the process humidity 
sensor.

Case 2

Cause

Process humidity sensor 
trouble

Check & 
Remedy

Replace the process 
humidity sensor.

Case 3

Cause

PCU PWB trouble

Check & 
Remedy

Replace the PCU PWB.