Sharp MX-M350 Service Manual page 241

MAIN SUB
F6 98 Content Combination error of the FAX-BOX
destination information and the
machine destination information
Detail Combination error of the FAX-BOX
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).
Check and Check the destination of the FAX-BOX.
remedy 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
Check & When replacing the EEPROM, use
Remedy 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··· Content Thermistor open
HL1 Fusing unit not installed
Detail Thermistor is open.
01···
(An input voltage of 2.92V or above is
HL2
detected.)
Fusing unit not installed
Cause Thermistor trouble
Control PWB trouble
Fusing section connector
disconnection
AC power trouble
Fusing unit not installed
Check and Check harnesses and connectors from
remedy the thermistor to the control PWB.
Use SIM14 to clear the self diag
display.
Details
MX-M350/M450 N/U TROUBLE CODES 11 - 9
MAIN SUB
H3 00··· Content Fusing section high temperature
HL1 trouble
Detail The fusing temperature exceeds
01···
242°C. (An input voltage of 0.27V or
HL2
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
Check and Use SIM5-2 to check the heater lamp
remedy Blinking operation.
If the heater lamp blinks normally:
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
H4 00··· Content Fusing section low temperature trouble
HL1
Detail The set temperature is not reached
within the specified time (3 min) after
01···
turning on the power relay, or the
HL2
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
Check and Use SIM5-2 to check the heater lamp
remedy Blinking operation.
If the heater lamp blinks normally:
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.
Details