Read Sharp MX-M350N / MX-M350U / MX-M450N / MX-M450U (serv.man8) Service Manual online
MX-M350/M450 N/U TROUBLE CODES 11 - 9
F6
98
Content
Combination error of the FAX-BOX
destination information and the
machine destination information
destination information and the
machine destination information
Detail
Combination error of the FAX-BOX
destination information and the
machine destination information
destination information and the
machine destination information
Cause
Because of improper combination
between the destination information
stored in the EEPROM on the FAX-
BOX PWB and that of the machine (set
with SIM 26-6).
between the destination information
stored in the EEPROM on the FAX-
BOX PWB and that of the machine (set
with SIM 26-6).
Check and
remedy
remedy
Check the destination of the FAX-BOX.
Check the machine destination with
SIM 26-6.
Use a proper combination of the
machine and the FAX-BOX.
Check the machine destination with
SIM 26-6.
Use a proper combination of the
machine and the FAX-BOX.
F7
01
Content
FAX board EEPROM read/write error
Details
EEPROM access error (read/write)
Cause
EEPROM trouble
FAX PWB EEPROM access circuit
trouble
FAX PWB EEPROM access circuit
trouble
Check &
Remedy
Remedy
When replacing the EEPROM, use
SIM66-4/5 (Signal send level) and
SIM66-14/15/16 (Dial test) for
adjustment. However, note that all the
soft switches are reset to the initial
values.
No need to adjust when the PWB is
replaced.
SIM66-4/5 (Signal send level) and
SIM66-14/15/16 (Dial test) for
adjustment. However, note that all the
soft switches are reset to the initial
values.
No need to adjust when the PWB is
replaced.
H2
00···
HL1
01···
HL2
Content
Thermistor open
Fusing unit not installed
Fusing unit not installed
Detail
Thermistor is open.
(An input voltage of 2.92V or above is
detected.)
Fusing unit not installed
(An input voltage of 2.92V or above is
detected.)
Fusing unit not installed
Cause
Thermistor trouble
Control PWB trouble
Fusing section connector
disconnection
AC power trouble
Fusing unit not installed
Control PWB trouble
Fusing section connector
disconnection
AC power trouble
Fusing unit not installed
Check and
remedy
remedy
Check harnesses and connectors from
the thermistor to the control PWB.
Use SIM14 to clear the self diag
display.
the thermistor to the control PWB.
Use SIM14 to clear the self diag
display.
MAIN SUB
Details
H3
00···
HL1
01···
HL2
Content
Fusing section high temperature
trouble
trouble
Detail
The fusing temperature exceeds
242°C. (An input voltage of 0.27V or
above is detected.)
Fusing temperature control is started,
and 242°C is detected three or more
times continuously in sampling in the
specified interval. (Every 300msec)
242°C. (An input voltage of 0.27V or
above is detected.)
Fusing temperature control is started,
and 242°C is detected three or more
times continuously in sampling in the
specified interval. (Every 300msec)
Cause
Thermistor trouble
Control PWB trouble
Fusing section connector
disconnection
AC power trouble
Control PWB trouble
Fusing section connector
disconnection
AC power trouble
Check and
remedy
remedy
Use SIM5-2 to check the heater lamp
Blinking operation.
Blinking operation.
If the heater lamp blinks normally:
Check the thermistor and its
harness.
Check the thermistor input circuit in
the control PWB.
Check the thermistor and its
harness.
Check the thermistor input circuit in
the control PWB.
If the heater lamp keep lighting:
Check the AC PWB and the lamp
control circuit in the control PWB.
Use SIM14 to cancel the trouble
control circuit in the control PWB.
Use SIM14 to cancel the trouble
H4
00···
HL1
01···
HL2
Content
Fusing section low temperature trouble
Detail
The set temperature is not reached
within the specified time (3 min) after
turning on the power relay, or the
temperature does not reach 80°C
within 80 sec.
When the heater lamp is not turned off
in the specified time (3 min) from
starting warm-up, or the temperature
does not reach 80°C within 80 sec.
After completion of warm-up operation,
a temperature 50°C lower than the
temperature control level is detected 5
times continuously in sampling in the
specified interval. (every 300msec)
within the specified time (3 min) after
turning on the power relay, or the
temperature does not reach 80°C
within 80 sec.
When the heater lamp is not turned off
in the specified time (3 min) from
starting warm-up, or the temperature
does not reach 80°C within 80 sec.
After completion of warm-up operation,
a temperature 50°C lower than the
temperature control level is detected 5
times continuously in sampling in the
specified interval. (every 300msec)
Cause
Thermistor trouble
Heater lamp trouble
Control PWB trouble
Thermostat trouble
AC power trouble
Interlock switch trouble
Heater lamp trouble
Control PWB trouble
Thermostat trouble
AC power trouble
Interlock switch trouble
Check and
remedy
remedy
Use SIM5-2 to check the heater lamp
Blinking operation.
Blinking operation.
If the heater lamp blinks normally:
Check the thermistor and its
harness.
Check the thermistor input circuit in
the control PWB.
Check the thermistor and its
harness.
Check the thermistor input circuit in
the control PWB.
If the heater lamp does not light:
Check for heater lamp disconnection
and thermostat disconnection.
Check the interlock switch.
Check the AC PWB and the lamp
control circuit in the control PWB.
Use SIM14 to cancel the trouble.
and thermostat disconnection.
Check the interlock switch.
Check the AC PWB and the lamp
control circuit in the control PWB.
Use SIM14 to cancel the trouble.
MAIN SUB
Details
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