Sharp SF-2020 Service Manual page 121

Trouble code Sub code
L1 00
L3 00
L4 01
L5 02
L8 01
03
H2 00
H3 00
H4 00
U2 01
04
U4 00
(SF-2120 only)
02
03
12
U5 00
01
02
05
11
16
Content
Mirror feed trouble
Mirror return trouble
Main motor trouble
Lens trouble
Zero cross pulse (FW) trouble
AE sensor trouble
Fusing thermistor open detection
Fusing high temperature trouble
Fusing low temperature trouble
Backup memory trouble
Backup IC (EEPROM) access error
ADU communication error
Alignment plate motor trouble
Rear edge plate motor trouble
ADU transport motor trouble
ADF communication error
Resist sensor, resist width sensor
adjustment trouble
Paper exit/reverse sensor adjustment
trouble
Timing sensor adjustment trouble
Paper feed motor trouble
ADF fan motor
9 – 2
Condition
•
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).
•
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.
•
During rotation of the main motor, MMRE (encoder) pulse is
not sensed for more than 0.5 sec.
•
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.
•
The zero cross pulse width is shifted more than 10%.
•
When the AE sensor
(simulation 47) is executed, the AE sensor input does not
change.
•
The thermistor (TH) input value exceeds 4.07V.
•
The fusing temperature is sensed as abnormally high as
240 degrees C (thermistor input value 0.38V or less).
•
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.
•
The counter addition value and the check sum value are
different from each other.
•
Data read/write to the backup IC (EEPROM) cannot be
performed.
•
A communication error occurs between the ADU and the
copier.
•
The initial operation (returning to the home position) of the
alignment plate does not complete within 5 sec.
•
The initial operation (returning to the home position) of the
rear edge plate does not complete within 5 sec.
•
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.
•
An error occurred in communication of the ADF and the
main unit.
•
When executing the resist sensor and the resist width
sensor adjustment (simulation 53-4), the adjustment value
is outside the specified range.
•
When executing the paper exit/reverse sensor adjustment
(simulation 53-5), the adjustment value is outside the
specified range.
•
When the timing sensor adjustment (SIM 53-6) is executed,
the adjustment value is outside the adjustment range.
•
During rotation of the paper feed motor, the rotation pulse is
not sensed for 0.1 sec or more.
•
The ADF fan motor lock signal is sensed continuously for 2
sec.
characteristics measurement