Read Sharp MX-M350N / MX-M350U / MX-M450N / MX-M450U (serv.man8) Service Manual online
MX-M350/M450 N/U TROUBLE CODES 11 - 13
4. Other related items
(1) Self diag operation
The machine always monitors its own status. When it detects any
abnormality or a status which requires warning, it performs the self
diag operation to display the trouble or warning message as fol-
lows:
abnormality or a status which requires warning, it performs the self
diag operation to display the trouble or warning message as fol-
lows:
(2) Power ON trouble detection function
• When the power is turned on, if the stored trouble is H3, H4, H5,
U1, U2, PF, or U6 (sub code 2, 3), it is immediately judged as a
trouble.
trouble.
∗
E7-50 and 60 are not judged as a storing trouble, (Detected
every time when the power is turned on.)
every time when the power is turned on.)
(3) Basic flow of countermeasures
EE
EU
Content
Auto developer adjustment trouble
(Under-toner)
(Under-toner)
Detail
The toner concentration output is
detected as 3.5V or above in the auto
development adjustment.
detected as 3.5V or above in the auto
development adjustment.
Cause
Insufficient toner concentration
Charging voltage, developing voltage
abnormality
Insufficient toner concentration
Developing unit trouble
PCU PWB trouble
Charging voltage, developing voltage
abnormality
Insufficient toner concentration
Developing unit trouble
PCU PWB trouble
Check and
remedy
remedy
Use SIM25-2 to perform auto developer
adjustment.
adjustment.
PF
00
Content
RIC copy inhibit signal is received.
Detail
Copy inhibit command from RIM (host)
is received.
is received.
Cause
Judged by the host.
Check and
remedy
remedy
Inform to the host.
Warning
Content
This message is displayed to warn
mainly the user to inform that a
consumable part is near life, etc. It is
no direct relation with machine
troubles.
mainly the user to inform that a
consumable part is near life, etc. It is
no direct relation with machine
troubles.
Machine
operation
operation
The machine operation may be
stopped and may be not.
stopped and may be not.
Message
clear
clear
The message may be automatically
cleared by replacement or supply of
the consumable part, or may be
cleared by the specified simulation
operation.
cleared by replacement or supply of
the consumable part, or may be
cleared by the specified simulation
operation.
Trouble
Content
This message is a trouble message
related to a machine trouble.
related to a machine trouble.
Machine
operation
operation
The machine operation is stopped.
Message
clear
clear
This message may be automatically
cleared by repairing the trouble, or
may be cleared by the specified
simulation operation.
cleared by repairing the trouble, or
may be cleared by the specified
simulation operation.
MAIN SUB
Details
Trouble code
Storing
Trouble cancel command
simulation
H3, H4, H5
PCU
SIM 14
U1
ICU
SIM 13
U2
Each block
SIM 16
PF
ICU
SIM 17
U6-2, 3
PCU
SIM 15
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
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