Read Sharp AL-840 (serv.man9) Service Manual online
No
C10
BASIC CAUSE 1
1) Fusing temperature (thermistor) output level recognition error
2) Fusing temperature sensor (thermistor) output level abnormality
2) Fusing temperature sensor (thermistor) output level abnormality
CASE 1
No
TROUBLE POSITION
CAUSE
CAUSE
Fusing temperature sensor (thermistor) signal recognition error
1) Fusing temperature sensor (thermistor) trouble
2) MCU PWB temperature sensor (thermistor) input circuit trouble
3) Fusing temperature sensor (thermistor) dirt
1) Fusing temperature sensor (thermistor) trouble
2) MCU PWB temperature sensor (thermistor) input circuit trouble
3) Fusing temperature sensor (thermistor) dirt
REMEDY
(Check)
1) Fusing temperature sensor (thermistor)
2) MCU PWB fusing temperature sensor (thermistor) input circuit
1) Fusing temperature sensor (thermistor)
2) MCU PWB fusing temperature sensor (thermistor) input circuit
(Remedy)
1) Fusing temperature sensor (thermistor) replacement
2) MCU PWB replacement
3) Fusing temperature sensor (thermistor) cleaning
4) Reset the trouble with SIM 14.
1) Fusing temperature sensor (thermistor) replacement
2) MCU PWB replacement
3) Fusing temperature sensor (thermistor) cleaning
4) Reset the trouble with SIM 14.
(After work)
1) When the MCU PWB is replaced, perform simulations to input various set values and
1) When the MCU PWB is replaced, perform simulations to input various set values and
adjustment values.
NOTE
CASE 2
No
TROUBLE POSITION
CAUSE
CAUSE
Heater lamp control signal trouble
1) MCU PWB heater lamp control circuit trouble
1) MCU PWB heater lamp control circuit trouble
REMEDY
(Check)
1) MCU PWB
1) MCU PWB
(Remedy)
1) MCU PWB replacement
2) Reset the trouble with SIM 14.
1) MCU PWB replacement
2) Reset the trouble with SIM 14.
(After work)
1) When the MCU PWB is replaced, perform simulations to input various set values and
1) When the MCU PWB is replaced, perform simulations to input various set values and
adjustment values.
NOTE
CASE 3
No
TROUBLE POSITION
CAUSE
CAUSE
Heater lamp drive trouble
1) Power PWB heater lamp drive circuit trouble
1) Power PWB heater lamp drive circuit trouble
REMEDY
(Check)
1) Power PWB
1) Power PWB
(Remedy)
1) Power PWB replacement
2) Reset the trouble with SIM 14.
1) Power PWB replacement
2) Reset the trouble with SIM 14.
(After work)
NOTE
SELF DIAG CODE MESSAGE
H4
No
C11
PHENOMENON
DISPLAY
CODE
MAIN CODE
H4
SUB CODE
00
LAMP
TITLE
Fusing low temperature trouble
DETAIL
1) Fusing temperature sensor (thermistor) output level abnormality
2) Fusing temperature sensor (thermistor) output level recognition error
2) Fusing temperature sensor (thermistor) output level recognition error
SECTION
ITEM
TYPE (MODE)
User
Warning
Service
YES
Trouble
YES
Other
Other
OPERATION MODE
Machine operation when the
message is displayed
message is displayed
Stop
NOTE
BASIC CAUSE 1
1) Fusing temperature sensor (thermistor) output level abnormality
2) Fusing temperature sensor (thermistor) output level recognition error
2) Fusing temperature sensor (thermistor) output level recognition error
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