DOWNLOAD Sharp AR-C170 (serv.man28) Service Manual ↓ Size: 244.96 KB | Pages: 28 in PDF or view online for FREE

AR-C170M  TROUBLESHOOTING  11 - 21

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

The fusing temperature 
exceeds 230°C.

Section

Fusing

Common

Check 

Use SIM 5-2 to check the 
heater lamp flashing 
operation.

Case 1

Cause

The heater lamp flashes 
properly with SIM 5-2. 
Thermistor trouble, 
disconnection of the fusing 
section connector

Check & 
Remedy

Check the thermistor and its 
harness. Cancel the error 
with SIM 14.

Case 2

Cause

The heater lamp keeps ON 
with SIM 5-2.
Control PWB trouble, AC 
power supply trouble

Check & 
Remedy

Check the AC PWB and the 
control PWB lamp control 
circuit.
Cancel the error with SIM 
14.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

The fusing temperature 
exceeds 230°C.

Section

Fusing

Common

Check 

Use SIM 5-2 to check the 
heater lamp flashing 
operation.

Case 1

Cause

The heater lamp flashes 
properly with SIM 5-2.
Thermistor trouble, 
disconnection of the fusing 
section connector

Check & 
Remedy

Check the thermistor and its 
harness. Cancel the error 
with SIM 14.

Case 2

Cause

The heater lamp keeps ON 
with SIM 5-2.
AC power supply trouble, 
control PWB trouble

Check & 
Remedy

Check the AC PWB and the 
control PWB lamp control 
circuit.
Cancel the error with SIM 
14.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

The fusing temperature is 
not reached within the 
specified time after turning 
on the power relay.

Section

Fusing

Common

Check

Use SIM 5-2 to check the 
heater lamp flashing 
operation.

Case 1

Cause

The heater lamp flashes 
properly with SIM 5-2. 
Thermistor trouble, PCU 
PWB (thermistor input 
circuit) trouble

Check & 
Remedy

Check the thermistor and its 
harness. Check the PCU 
PWB thermistor input 
circuit.
Cancel the error with SIM 
14.

Case 2

Cause

The heater lamp keeps ON 
with SIM 5-2.
Heater lamp trouble, 
thermostat trouble, interlock 
switch trouble, AC power 
supply trouble, PCU PWB 
(lamp control circuit) trouble

Check & 
Remedy

Check for disconnection of 
the heater lamp and the 
thermostat. Check the 
interlock switch. Check the 
AC PWB and the PUC PWB 
lamp control circuit.
Cancel the error with SIM 
14.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

The fusing temperature is 
not reached within the 
specified time after turning 
on the power relay.

Section

Fusing

Common

Check

Use SIM 5-2 to check the 
heater lamp flashing 
operation.

Case 1

Cause

The heater lamp flashes 
properly with SIM 5-2. 
Thermistor trouble, PCU 
PWB (thermistor input 
circuit) trouble

Check & 
Remedy

Check the thermistor and its 
harness. Check the PCU 
PWB thermistor input 
circuit.
Cancel the error with SIM 
14.

AR-C170M  TROUBLESHOOTING  11 - 22

Case 2

Cause

The heater lamp keeps ON 
with SIM 5-2.
Heater lamp trouble, 
thermostat trouble, interlock 
switch trouble, AC power 
supply trouble, PCU PWB 
(lamp control circuit) trouble

Check & 
Remedy

Check for disconnection of 
the heater lamp and the 
thermostat. Check the 
interlock switch.
Check the AC PWB and the 
PUC PWB lamp control 
circuit.
Cancel the error with SIM 
14.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

POD1 not-reached jams are 
detected for five times 
continuously.

Section

Fusing

Case 1

Cause

A fusing jam is not canceled 
completely. (Jam paper 
remains inside the 
machine.)

Check & 
Remedy

Check remaining jam paper 
(winding).
Cancel the error with SIM 
14.

Case 2

Cause

POD1 sensor trouble, or 
harness disconnection

Check & 
Remedy

Check POD1 sensor 
harness.
Cancel the error with SIM 
14.

Case 3

Cause

Improper installation of the 
fusing unit

Check & 
Remedy

Check installation of the 
fusing unit.
Cancel the error with SIM 
14.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

Mirror feed is not completed 
within the specified time.

Section

—

Case 1

Cause

Mirror unit trouble, mirror 
wire breakage

Check & 
Remedy

Use SIM 1-1 to check the 
mirror operation.

Main 
code

Sub 

code

Title

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

Mirror return is not 
completed within the 
specified time.

Section

—

Case 1

Cause

Mirror unit trouble, mirror 
wire breakage

Check & 
Remedy

Use SIM 1-1 to check the 
mirror operation.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

In warm-up, or in canceling 
a jam, the paper feed motor 
is rotated, and the lock 
signal is not detected within 
1sec.

Section

Paper feed

Case 1

Cause

Paper feed motor trouble, 
disconnection of the 
harness between the PCU 
PWB and the paper feed 
motor, control circuit trouble

Check & 
Remedy

Use SIM 6-1 to check the 
paper feed motor operation. 
Check the harness and the 
connector between the 
PCU PWB and the paper 
feed motor.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

When the belt motor lifts up 
or down, the change in the 
belt home position sensor 
characteristics is not 
detected within the 
specified time. 
(When the motor lifts up, 
the lower limit sensor 
remains ON after the 
specified time.)
(When the motor lifts down, 
the lower limit sensor does 
not turn on after the 
specified time.)

Section

Paper feed

Case 1

Cause

Belt lift motor trouble, 
disconnection of the 
harness between the PCU 
PWB and the belt lift motor, 
control circuit trouble

Check & 
Remedy

Use SIM 6-1 to check the 
belt lift motor operation. 
Check the harness and the 
connector between the 
PCU PWB and the belt lift 
motor.

AR-C170M  TROUBLESHOOTING  11 - 23

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

1. Before driving the drum, 

the calibration plate is 
opened with the process 
control BK sensor, and 
light is emitted with the 
gain value of 0 and with 
the light emitting quantity 
fixed to 120. The 
average of ten light 
quantities repeats to be 5 
or less for 3 times 
continuously.

2. Immediately after driving 

the drum, the calibration 
plate is opened with the 
process control BK 
sensor, and one whole 
turn of the belt surface is 
scanned with the gain 
value of 0 and with the 
light emitting quantity at 
the optimum value (120 
– 50). The difference 
between the max. value 
and the min. value of the 
scanned data is 5 or 
less.

Section

Paper feed

Case 1

Cause

Transfer belt motor 
connector disconnection, 
defective connection of the 
harness between the PCU 
PWB and the transfer belt 
motor

Check & 
Remedy

Check the transfer belt 
motor operation with 
SIM25-1. Check the 
harness and the connector 
between the PCU PWB and 
the transfer belt motor.

Case 2

Cause

Process control sensor 
connector disconnection, 
process control BK sensor 
defect

Check & 
Remedy

Check the process control 
sensor operation with 
SIM44-2. Check the 
harness and the connector 
between the PCU PWB and 
the transfer belt motor.

Case 3

Cause

Defective control circuit

Check & 
Remedy

Check the control circuit.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

When initializing the shift 
motor, the change in the 
shift motor home position 
sensor characteristics is not 
detected within the 
specified time.

Section

Paper feed

Case 1

Cause

Shift motor trouble, 
disconnection of the 
harness between the PCU 
PWB and the shift motor, 
control circuit trouble

Check & 
Remedy

Use SIM 6-1 to check the 
shift motor operation. Use 
SIM 30-1 to check the shift 
motor home position 
sensor. Check the harness 
and the connector between 
the PCU PWB and the shift 
motor.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

The full wave signal is not 
provided.

Section

—

Case 1

Cause

PCU PWB trouble

Check & 
Remedy

Replace the PCU PWB.

Case 2

Cause

Power supply unit trouble

Check & 
Remedy

Replace the power supply 
unit.

Case 3

Cause

Harness trouble

Check & 
Remedy

Check connection of the 
harness and the connector.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

An abnormality of the full 
wave signal frequency is 
detected. (The detected 
frequency is 65kHz or 
above, or 45kHz or below.)

Section

—

Case 1

Cause

PCU PWB trouble

Check & 
Remedy

Replace the PCU PWB.

Case 2

Cause

Power supply unit trouble

Check & 
Remedy

Replace the power supply 
unit.

Case 3

Cause

Harness trouble

Check & 
Remedy

Check connection of the 
harness and the connector.

AR-C170M  TROUBLESHOOTING  11 - 24

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

Though the PCU program is 
operating (the power is 
supplied), the main power 
switch OFF is detected.

Section

—

Case 1

Cause

Main power switch trouble

Check & 
Remedy

Replace the main power 
switch.

Case 2

Cause

Power supply unit trouble

Check & 
Remedy

Replace the power supply 
unit.

Case 3

Cause

Harness trouble

Check & 
Remedy

Check connection of the 
harness and the connector.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

The copy inhibit signal from 
RIC (host) is received.

Section

—

Case 1

Cause

Depends on a judgment by 
the host.

Check & 
Remedy

Make notification to the 
host. Use SIM 27-1 to 
ignore.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

Communication 
establishment error, 
framing/parity/protocol error.
ROM version phase shift.

Section

—

Case 1

Cause

Disconnection of the 
operation panel 
communication connector 
of the ICU/MFP PWB, 
harness trouble between 
the ICU PWB and the MFP 
PWB.

Check & 
Remedy

Check the connector and 
the harness between the 
ICU PWB and the MFP 
PWB.

Case 2

Cause

ICU/MFP PWB trouble

Check & 
Remedy

Check grounding of the 
machine.
Replace the ICU PWB or 
the MFP PWB.

Case 3

Cause

When the OPE-ROM 
without security functions is 
installed for the ICU-ROM 
with security kit functions.

Check & 
Remedy

Check the ROM version, 
and replace it if necessary.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

FAX backup SRAM battery 
voltage fall

Section

FAX

Case 1

Cause

Battery life

Check & 
Remedy

Check to insure that the 
battery voltage is about 
2.5V or above.

Case 2

Cause

Battery circuit abnormality.

Check & 
Remedy

Check the battery circuit.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

Abnormal value is read from 
the RTC on the ICU PWB.

Section

—

Case 1

Cause

RTC circuit abnormality

Check & 
Remedy

Set the time again with the 
key operation, and check 
that time advances 
properly.
Check the RTC circuit.

Case 2

Cause

Battery voltage fall. Battery 
circuit abnormality.

Check & 
Remedy

Check to insure that the 
battery voltage is about 
2.5V or above. Check the 
battery circuit.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

EEPROM version error
EEPROM write error

Section

—

Case 1

Cause

EEPROM trouble. 
EEPROM is not initialized.

Check & 
Remedy

1. Check that the EEPROM 

is properly set.

2. Use SIM 16 to cancel the 

error.

Case 2

Cause

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.