Ricoh M047 Service Manual page 151

Code No.
FGATE error
The FGATE signal cannot be
detected for 1 second after the
230 B
machine has sent a start trigger.
The FGATE signal is still detected for
13 seconds after the machine has
detected the FGATE signal.
LD error
The machine detects LDB error a few
240 C
times consecutively when LDB unit
turns on after LDB initialization.
Charge roller current leak
60% or more of the PWM duty output
300 B
is detected for 0.2 seconds when the
charge bias is generated by the
charge roller.
Development bias leak
60% or more of the PWM duty output
330 B
is detected for 0.2 seconds when the
development bias is generated by
the development roller.
Main motor lock
A main motor lock signal is not
detected for more than 700 ms after
520 B
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.
SM Appendix
CÓPIA NÃO CONTROLADA
Symptom
2-3
CÓPIA NÃO CONTROLADA
Service Call Conditions
Possible Cause
Engine board defective
Controller board defective
Harness broken
Worn-out LD unit
Disconnected or broken harness
of the LD unit
LD unit defective
Cartridge (charge roller)
defective
High voltage supply board
defective
Cartridge (development roller)
defective
High voltage supply board
defective
Main motor defective
Harness broken
Too much load on the drive
mechanism
M047