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AR-C170M  TROUBLESHOOTING  11 - 1

In case of a trouble in the machine, or when a consumable part
has nearly reached or already reach the lifetime, the machine
detects it, analyze it, and displays it on the display section and
notifies the user and the serviceman by a voice message.

The user and the serviceman are bale to perform the proper coun-
termeasures according to a voice message. In case of a trouble,
the machine is stopped to restrict damage to a minimum in addi-
tion to a voice message.

1) Assures safety. (The machine is stopped when a trouble is

detected.)

2) Restricts damage to a minimum. (The machine is stopped

when a trouble is detected.)

3) By displaying the trouble content, the trouble position can be

identified immediately and accurately. (An accurate repair
work can be performed, improving the repair efficiency.)

4) By providing a preparatory warning when the lifetime of a con-

sumable part is nearly reached, arrangement of the consum-
able part can be made in advance. (Stopping the machine by
exhaustion of a consumable part is avoidable.)

The self diagnostic messages are classified as follows:

The machine always monitors its own status.

When the machine detects a trouble, it stops operations and dis-
plays a trouble message.

A warning message is provided mainly when a consumable part is
nearly or completely exhausted.

When a warning message is provided, the machine may be
stopped or may not be stopped depending on the message.

The trouble and warning messages are indicated with the LCD
and lamps.

Some trouble messages may be automatically cleared after
removing the trouble, and some must be cleared with the simula-
tion.

Some warning messages of consumable parts are automatically
cleared when the trouble is repaired. Some other warning mes-
sages must be cleared by a simulation.

Class 1

User

Troubles and warning messages (paper 
jam, consumable part life expiration, etc.) 
which can be processed by the user.

Service

Troubles and warning messages (motor 
trouble, maintenance, etc.) which can be 
processed only by a serviceman.

Other

—

Class 2

Warning

Warning messages (consumable part life 
expiration, etc.) for the user, which are not 
directly related to any machine trouble.

Trouble

Related to a machine trouble. The 
machine is stopped.

Other

—

Troubleshoot the cause.

YES

NO

Detects/analyzes

the content.

Trouble/Warning

Warning

Trouble

The machine is stopped.

The content is displayed.

Trouble/Warning

Warning

A consumable

part has reached

its lifetime.

Trouble

Replace or supply

the consumable part. 

Cancel the self-

diagnostic message with

the diagnostics

(test commands). 

Reset

Standby state

Monitors the machine

conditions.

Repair

AR-C170M  TROUBLESHOOTING  11 - 2

Main 
code

Sub 

code

Content

C2

10

Transfer charger trouble (Black)

E7

01

Image data memory trouble

10

Shading trouble (Black correction)

11

Shading trouble (White correction)

20

LED controller initial trouble (Black)

21

LED controller initial trouble (Cyan)

22

LED controller initial trouble (Magenta)

23

LED controller initial trouble (Yellow)

24

LED controller output trouble (Black)

25

LED controller output trouble (Cyan)

26

LED controller output trouble (Magenta)

27

LED controller output trouble (Yellow)

28

LED control ASIC connection abnormality

40

Color correction data write abnormality

41

Color correction data transfer abnormality

80

ICU-SCN communication trouble (ICU detection)

90

ICU-PCU communication trouble (ICU detection)

F1

00

Saddle finisher/sorter communication trouble 
(Machine detection)

02

Saddle finisher transport motor trouble (Saddle 
finisher detection)

03

Saddle finisher paddle motor trouble

06

Saddle finisher slide motor trouble

10

Saddle finisher staple motor trouble (Saddle 
finisher detection)

11

Saddle finisher bundle process motor 
abnormality (Saddle finisher detection)

15

Saddle finisher tray lift motor abnormality (Saddle 
finisher detection)

19

Saddle finisher front alignment motor abnormality 
(Saddle finisher detection)

20

Saddle finisher rear alignment motor abnormality 
(Saddle finisher detection)

31

Saddle finisher fold sensor trouble

32

Saddle finisher punch unit communication trouble

33

Saddle finisher punch side registration motor 
trouble

34

Saddle finisher punch motor trouble

35

Saddle finisher punch side registration sensor 
trouble

36

Saddle finisher punch registration sensor trouble

37

Saddle finisher/sorter backup RAM trouble

38

Saddle finisher punch backup RAM trouble

39

Saddle finisher punch dust sensor trouble

40

Saddle finisher punch power disconnection 
trouble

83

Sorter push bar motor trouble

89

Sorter bin shift motor trouble

91

Automatic adjustment trouble of the paper sensor 
in the sorter bin

F2

39

Process thermistor breakdown

40

Toner empty sensor abnormality (Black)

41

Toner empty sensor abnormality (Cyan)

42

Toner empty sensor abnormality (Magenta)

43

Toner empty sensor abnormality (Yellow)

44

Black image density sensor trouble (Transfer belt 
surface reflection ratio abnormality)

45

Color image density sensor trouble (Calibration 
plate surface reflection ratio abnormality)

58

Process humidity sensor breakdown

70

Developing unit improper cartridge detection 
(Black)

71

Developing unit improper cartridge detection 
(Cyan)

72

Developing unit improper cartridge detection 
(Magenta)

73

Developing unit improper cartridge detection 
(Yellow)

74

Developing unit CRUM trouble (Black)

75

Developing unit CRUM trouble (Cyan)

76

Developing unit CRUM trouble (Magenta)

77

Developing unit CRUM trouble (Yellow)

78

Trouble of image density sensor for registration 
(Transfer belt surface reflection ratio abnormality)

80

Half-tone process control 1st patch error (Black)

81

Half-tone process control 1st patch error (Cyan)

82

Half-tone process control 1st patch error 
(Magenta)

83

Half-tone process control 1st patch error (Yellow)

84

Half-tone process control 2nd patch error (Black)

85

Half-tone process control 2nd patch error (Cyan)

86

Half-tone process control 2nd patch error 
(Magenta)

87

Half-tone process control 2nd patch error 
(Yellow)

90

Half-tone process control limit error

F3

12

Cassette 1 lift up trouble

F6

00

ICU-FAX communication trouble (ICU detection)

01

FAX expansion flash memory abnormality (ICU 
detection)

04

FAX MODEM operation abnormality

20

FAX write protect release

21

Improper combination of the TEL/LIU PWB and 
the FAX soft switch.

97

The FAX-BOX PWB is not one for the AR-
C170M. (FAX detection)

98

Improper combination of the FAX-BOX 
destination data and the main unit destination 
data

F7

01

FAX board EEPROM read/write error

F9

00

ICU-PRT communication trouble (ICU detection)

01

PRT DRAM trouble

03

NIC port check error

20

HDD trouble (PRT controller detection)

H2

00

Thermistor open (HL1)

01

Thermistor open (HL2)

H3

00

Fusing section high temperature trouble (THS1)

01

Fusing section high temperature trouble (THS2)

H4

00

Fusing section low temperature trouble (HL1)

01

Fusing section low temperature trouble (HL2)

H5

01

Five continuous detections of POD1 not-reached 
jam

L1

00

Mirror feed trouble

Main 
code

Sub 

code

Content

AR-C170M  TROUBLESHOOTING  11 - 3

L3

00

Mirror return trouble

L4

02

Paper feed motor lock trouble

06

Transfer belt lift motor trouble

07

Transfer belt motor trouble

11

Shift motor trouble

L8

01

Full wave signal not provided

02

Full wave signal width abnormality

04

Main power switch abnormality detection

PF

00

RIC copy inhibit signal reception 

U0

00

ICU-OPE communication trouble (ICU/OPE 
detection)

U1

01

FAX battery abnormality

02

RTC read trouble

U2

00

EEPROM read/write error (ICU detection)

11

EEPROM check sum error (ICU detection)

22

FAX backup SRAM memory check sum error

30

Production No. data discrepancy (ICU 

⇔

 ICU)

80

EEPROM read/write error (SCN)

81

Adjustment value check sum error (SCN)

90

EEPROM read/write error (PCU)

91

Adjustment value check sum error (PCU)

U4

02

ADU alignment plate operation abnormality

U6

00

Desk communication trouble

01

Desk tray 1 lift motor trouble

02

Desk tray 2 lift motor trouble

03

Desk tray 3 lift motor trouble

09

LCC lift motor trouble

10

Desk transport motor trouble

20

LCC communication trouble

21

LCC transport motor trouble

22

LCC 24V power abnormality

50

Desk incompatibility trouble

51

LCC incompatibility trouble

U7

00

RIC communication trouble

UC

02

CPT-ASIC trouble (MFP PWB trouble)

Main 
code

Sub 

code

Content

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

The difference between the 
belt surface output and the 
K-color patch density output 
does not reach the specified 
level. (Judged when 
installing a new developing 
unit.)

Section

Transfer

Case 1

Cause

TC-K output abnormality

Check & 
Remedy

TC-K analog input/output 
abnormality.
Replace the TC PWB.

Case 2

Cause

MC output abnormality

Check & 
Remedy

Replace the MC PWB.

Case 3

Cause

Transfer unit trouble

Check & 
Remedy

Replace the transfer unit.

Case 4

Cause

PCU PWB trouble

Check & 
Remedy

Replace the PCU PWB.

Case 5

Cause

Connector, harness trouble 
(PCU PWB, TC PWB, MC 
PWB, transfer unit)

Check & 
Remedy

Check contact. Replace the 
harness. Replace the PWB.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

The ICU image data 
memory (SDRAM) cannot 
be detected as 256MB or 
more. The required SDRAM 
capacity for the model is not 
provided.

Section

ICU PWB

Case 1

Cause

The SDRAM of ICU PWB is 
not installed. The SDRAM 
of ICU PWB is improperly 
installed.

Check & 
Remedy

Check installation of the 
SDRAM of ICU ASIC PWB.

Case 2

Cause

The SDRAM of ICU PWB 
does not operate properly.

Check & 
Remedy

Use SIM 22-10 to check the 
capacity of the SDRAM. 
Replace the SDRAM of ICU 
PWB.

Case 3

Cause

ICU PWB abnormality

Check & 
Remedy

Replace the ICU PWB.

AR-C170M  TROUBLESHOOTING  11 - 4

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

CCD black reading level 
abnormality when the copy 
lamp is off.

Section

CCD unit

Case 1

Cause

Improper installation of the 
flat cable to the CCD unit.

Check & 
Remedy

Check installation of the flat 
cable to the CCD unit.

Case 2

Cause

CCD unit abnormality

Check & 
Remedy

Check the CCD unit.

Case 3

Cause

MFP PWB abnormality

Check & 
Remedy

Check the MFP PWB.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

CCD white reading level 
abnormality when the copy 
lamp is on.

Section

CCD unit

Case 1

Cause

Improper installation of the 
flat cable to the CCD unit.

Check & 
Remedy

Check installation of the flat 
cable to the CCD unit.

Case 2

Cause

Dirt on the mirror, the lens, 
or the reference white plate.

Check & 
Remedy

Clean the mirror, the lens, 
or the reference white plate.

Case 3

Cause

CCD unit abnormality

Check & 
Remedy

Check the CCD unit.

Case 4

Cause

MFP PWB abnormality

Check & 
Remedy

Check the MFP PWB.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

The initial process of the 
LED controller cannot be 
completed properly.

Section

LED/ICU PWB

Case 1

Cause

Disconnection of the LED 
head connector.

Check & 
Remedy

Check connection of the 
LED head connector.

Case 2

Cause

Disconnection of the 
harness inside the LED 
head.

Check & 
Remedy

Replace the LED head unit.

Case 3

Cause

ICU PWB abnormality

Check & 
Remedy

Replace the ICU PWB.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

The initial process of the 
LED controller cannot be 
completed properly.

Section

LED/ICU PWB

Case 1

Cause

Disconnection of the LED 
head connector.

Check & 
Remedy

Check connection of the 
LED head connector

Case 2

Cause

Disconnection of the 
harness inside the LED 
head.

Check & 
Remedy

Replace the LED head unit.

Case 3

Cause

ICU PWB abnormality

Check & 
Remedy

Replace the ICU PWB.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

The initial process of the 
LED controller cannot be 
completed properly.

Section

LED/ICU PWB

Case 1

Cause

Disconnection of the LED 
head connector.

Check & 
Remedy

Check connection of the 
LED head connector

Case 2

Cause

Disconnection of the 
harness inside the LED 
head.

Check & 
Remedy

Replace the LED head unit.

Case 3

Cause

ICU PWB abnormality

Check & 
Remedy

Replace the ICU PWB.

Main 
code

Sub 

code

Title

Display

Lamp/Message

Phenomenon Detail

The initial process of the 
LED controller cannot be 
completed properly.

Section

LED/ICU PWB

Case 1

Cause

Disconnection of the LED 
head connector

Check & 
Remedy

Check connection of the 
LED head connector.

Case 2

Cause

Disconnection of the 
harness inside the LED 
head.

Check & 
Remedy

Replace the LED head unit.

Case 3

Cause

ICU PWB abnormality

Check & 
Remedy

Replace the ICU PWB.