AR-M550 (serv.man16). (9) Self diag message and troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 7

AR-M550/M620  SELF DIAG MESSAGE AND TROUBLESHOOTING  9 - 7

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

MC trouble
Three successive MHV-T 
signals are detected 
during operation of MHV.
Main charger output 
abnormality (Output 
open)
A trouble signal is 
outputted from the high 
voltage transformer.

Section

Engine

Operation 
mode
Note 

Case 1

Trouble 
position/
Cause

The main charger is not 
installed properly.
The main charger is not 
assembled properly.

Remedy

Use SIM 8-2 to check the 
main charger output.
Main charger 
disconnection check

Note 

Case 2

Trouble 
position/
Cause

The high voltage 
transformer connector is 
disconnected.
The high voltage harness 
is disconnected or 
broken.

Remedy

Connection check

Note 

Case 3

Trouble 
position/
Cause

High voltage unit trouble

Remedy

Replace the high voltage 
unit.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

Communication error

Section

Operation 
mode

Note 

Case 1

Trouble 
position/
Cause

Improper connection of 
the network cable

Remedy

Check the connection of 
the network cable.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

Network card connection 
trouble

Section
Operation 
mode
Note 

Case 1

Trouble 
position/
Cause

The network card is not 
installed on the controller.

Remedy

Check that the network 
card is installed on the 
controller.

Note 

Case 2

Trouble 
position/
Cause

Network card control 
PWB trouble

Remedy

1. Output the NIC Config. 

Page to check the NIC 
version.

2. Replace the NIC.

Note 

Main 
code

Sub 

code

Title

Phenomenon

Display

Lamp

Message

Details

The specified mail server 
or the FTP server is not 
found.

Section
Operation 
mode
Note 

Case 1

Trouble 
position/
Cause

Improper connection of 
the network cable

Remedy

Check that the network 
cable is properly 
connected.

Note 

Case 2

Trouble 
position/
Cause

Network setup trouble

Remedy

1. Check that the 

connected network 
supports TCP/IP 
protocol.

2. As Primary/Secondary 

E-mail Server Address 
or Destination from 
Web Page

3. When the above 

address is described 
with the Hostname, 
check that the DNS 
server is properly set 
or not.

Note