Sharp SF-1020 service manual SF-1120 only

Trouble code	Sub code	Content		Condition
L1	00	Mirror feed trouble	•	When initializing, MHPS is not turned off within 1.5 sec from
				starting feeding of the mirror.
			• When copying, MHPS is not turned off within 0.5 sec from
				starting feeding of the mirror.
			•	When feeding the mirror is started during copying, the
				mirror is not at the home position (MHPS is turned off).
L3	00	Mirror return trouble	•	When initializing, MHPS is not turned on within 2.5 sec from
				starting returning of the mirror.
			•	When copying, MHPS is not turned on within 2 sec from
				starting returning of the mirror.
L4	01	Main motor trouble	•	During rotation of the main motor, MMRE (encoder) pulse is
				not sensed for more than 0.5 sec.
L5	02	Lens trouble	•	The lens shift operation is not completed within 10 sec from
				starting.
			•	When the lens is moving to the home position (normal
				position), LHPS is not sensed even though the lens is
				shifted by the specified steps.
L8	01	Zero cross pulse (FW) trouble	•	The zero cross pulse width is shifted more than 10%.
	03	AE sensor trouble	•	When the AE sensor characteristics measurement
				(simulation 47) is executed, the AE sensor input does not
				change.
H2	00	Fusing thermistor open detection	•	The thermistor (TH) input value exceeds 4.07V.
H3	00	Fusing high temperature trouble	•	The fusing temperature is sensed as abnormally high as
				240 degrees C (thermistor input value 0.38V or less).
H4	00	Fusing low temperature trouble	•	When warming up, the ready temperature is not reached
				within 70 sec.
			• When controlling the temperature after completion of warm
				up, the fusing temperature (set temperature) is sensed as
				–40°C or less.
U2	01	Backup memory trouble	•	The counter addition value and the check sum value are
				different from each other.
	04	Backup IC (EEPROM) access error	•	Data read/write to the backup IC (EEPROM) cannot be
				performed.
U4	00	ADU communication error	•	A communication error occurs between the ADU and the
(SF-1120 only)				copier.
	02	Alignment plate motor trouble	•	The initial operation (returning to the home position) of the
				alignment plate does not complete within 5 sec.
	03	Rear edge plate motor trouble	•	The initial operation (returning to the home position) of the
				rear edge plate does not complete within 5 sec.
	12	ADU transport motor trouble	•	During rotation of the ADU transport motor, the DMRE
				(encoder) pulse is not sensed for more 0.5 sec or more.
			•	The encoder input remains below a certain level after
				500ms with the transport motor PWM at the max. level.
			•	The encoder input remains above a certain level after
				500ms with the transport motor PWM at the min. level.
U5	00	ADF communication error	•	An error occurred in communication of the ADF and the
				main unit.
	01	Resist sensor, resist width sensor	•	When executing the resist sensor and the resist width
		adjustment trouble		sensor adjustment (simulation 53-4), the adjustment value
				is outside the specified range.
	02	Paper exit/reverse sensor adjustment	•	When executing the paper exit/reverse sensor adjustment
		trouble		(simulation 53-5), the adjustment value is outside the
				specified range.
	05	Timing sensor adjustment trouble	•	When the timing sensor adjustment (SIM 53-6) is executed,
				the adjustment value is outside the adjustment range.
	11	Paper feed motor trouble	•	During rotation of the paper feed motor, the rotation pulse is
				not sensed for 0.1 sec or more.
	16	ADF fan motor	•	The ADF fan motor lock signal is sensed continuously for 2
				sec.

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