Sc Code Descriptions - Gestetner G056 Service Manual

SERVICE CALL CONDITIONS

4.1.2 SC CODE DESCRIPTIONS

Code No.
302 B Charge roller current leak
A charge roller current leak signal is
detected.
320 B Polygon motor error
The polygon motor does not reach its
operating speed within 10 seconds
after the polygon motor on signal, or
the lock signal is not detected for
more than a certain time during
operation.
322 B 1st laser synchronization error
The laser synchronization detector
cannot detect the laser
synchronization signal for more than
5 consecutive 100 ms intervals.
323 B LD drive current exceeded
The LD driver detects this error for
more than 500 ms.
326 B 2nd laser synchronization error
The 1
laser synchronization detector cannot
detect the laser synchronization
signal from the 2
consecutive 100 ms intervals.
391 B Development bias leak
A development bias leak signal is
detected.
500 B Main motor lock
A main motor lock signal is not
detected for more than 700 ms after
the main motor starts to rotate, or the
lock signal is not detected for more
than a certain time during rotation
after the last signal.
541 A Unstable fusing temperature
During warm-up, the fusing
temperature rises by less than 20 °C
during 11 seconds.
The fusing temperature detected by
the thermistor was 0 °C 5 seconds
after the fusing relay was turned on.
G056/G058
Symptom
st
LD1 is already on, but the
nd
LD for more than 5
• Cartridge (charge roller) defective
• High voltage supply board
defective
• Poor cartridge connection
• Polygon motor
• Polygon motor cable
• Laser synchronization detector
board out of position
• Laser synchronization detector
board or cable defective
• Laser synchronization mirror out of
position
• LD unit defective
• Engine board defective
• LD unit defective
• Laser synchronization detector
board out of position
• LD unit defective
• Engine board defective
• High voltage supply board
defective
• Poor cartridge connection
• Main motor defective
• Too much load on the drive
mechanism
• Thermistor defective
• Fusing lamp open
• Fusing thermostat open
• Power supply board defective
• Poor connection of the fusing unit
4-2
Possible Cause
SM