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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
(SF-1120 only)
00 ADU communication error • A communication error occurs between the ADU and the
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
adjustment trouble
• When executing the resist sensor and the resist width
sensor adjustment (simulation 53-4), the adjustment value
is outside the specified range.
02 Paper exit/reverse sensor adjustment
trouble
• When executing the paper exit/reverse sensor adjustment
(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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