AR-M155 (serv.man3). Service Manual - Sharp Copying Equipment Service Manual (repair manual). Page 105

AR-M150/M155/M155X  TEST COMMAND, TROUBLE CODES  10 - 39

Main 
code

Sub 

code

Details of trouble

E1

00

IMC communication trouble

10

IMC trouble

13

IMC flash ROM error

16

IMC DIMM memory read/write check error

81

IMC communication interface error (parity)

82

IMC communication interface error (Overrun)

84

IMC communication interface error (Framing)

E7

02

LSU trouble

10

Shading trouble (Black correction)

11

Shading trouble (White correction)

16

Abnormal laser output

F2

04

Improper cartridge (Destination error, life cycle error)

F5

02

Copy lamp lighting abnormality

F6

10

FAX board trouble

H2

00

Thermistor open

H3

00

Heat roller high temperature detection

H4

00

Heat roller low temperature detection

L1

00

Feeding is not completed within the specified time after 
starting feeding. (The scan head locking switch is locked)

L3

00

Scanner return trouble

L4

01

Main motor lock detection

L6

10

Polygon motor lock detection

U1

03

FAX board battery error

U2

04

EEPROM read/write error (Serial communication error)

11

Counter check sum error (EEPROM)

40

CRUM chip communication error

U9

99

Operation panel language error

Main 
code

Sub 

code

Details of trouble

E1

00

Content IMC communication trouble

Detail

An abnormality occurs in communication 
between the CPU and the IMC.

Cause

IMC – CPU signal line abnormality
IMC Memory defect/data abnormality

Check 
and 
remedy

Replace the MCU PWB with new one.

10

Content IMC trouble

Detail

An abnormality occurs in the IMC.

Cause

USB chip error/CODEC error on the IMC.

Check 
and 
remedy

Replace the MCU PWB with a new one.

13

Content IMC flash ROM error
Detail

An abnormality occurs in the IMC flash ROM.

Cause

IMC abnormality

Check 
and 
remedy

Replace the MCU PWB with a new one.
If downloading of the program is abnormally 
terminated, it may cause an error. Download 
the program again to avoid this.

E1

16

Content IMC DIMM memory read/write check error

Detail

An installation error occurs in the IMC memory 
module.
An error occurs during access to the IMC 
memory.

Cause

Improper installation of the IMC memory 
module.
IMC memory module abnormality
IMC memory contact abnormality
IMC abnormality.

Check 
and 
remedy

Check installation of the memory module.
Replace the memory module.
Replace the MCU PWB with a new one.

81

Content IMC communication interface error (parity)

Detail

A parity error occurs in communication between 
the CPU and the IMC.

Cause

IMC memory defect/data abnormality

Check 
and 
remedy

Check the memory of the IMC.
Replace the MCU PWB with new one.

82

Content IMC communication interface error (Overrun)
Detail

An overrun error occurs in communication 
between the CPU and the IMC.

Cause

IMC memory defect/data abnormality.

Check 
and 
remedy

Check the memory of the IMC.
Replace the MCU PWB with new one.

84

Content IMC communication interface error (Framing)

Detail

A framing error occurs in communication 
between the CPU and the IMC.

Cause

IMC memory defect/data abnormality.

Check 
and 
remedy

Check the memory of the IMC.

E7

02

Content LSU trouble

Detail

The BD signal from the LSU cannot be detected 
in a certain cycle. (Always OFF or always ON)

Cause

LSU connector or LSU harness defect or 
disconnection
Polygon motor rotation abnormality
Laser beams are not generated.
MCU PWB abnormality.

Check 
and 
remedy

Check connection of the LSU connector.
Execute TC 61-03 to check the LSU operations.
Check that the polygon motor rotates normally.
Check that the laser emitting diode generates 
laser beams.
Replace the LSU unit.
Replace the MCU PWB.

10

Content Shading trouble (Black correction)

Detail

The CCD black scan level is abnormal when the 
shading.

Cause

Improper connection of the CCD unit flat cable
CCD unit abnormality
MCU PWB abnormality

Check 
and 
remedy

Check connection of the CCD unit flat cable.
Check the CCD unit.

Main 
code

Sub 

code

Details of trouble