Ricoh D072 Service Manual page 264

No.
Definition
Zero cross signal malfunction
The zero cross signal is not
detected within five seconds after
547 B
the main power switch is turned on.
Or, the zero cross signal is not
detected within one second after
operation begins.
Consecutive fusing jam
The paper jam counter for the
fusing unit reaches 3 times. The
paper jam counter is cleared if the
559 A
paper is fed correctly.
This SC is activated only when
SP1159-001 is set to "1" (default
"0").
Exhaust fan motor error
590 B
The exhaust fan motor is locked for
five seconds.
ADF gate error 1
The ADF sends the FGATE signal
760 B
before it is requested to scan
originals.
ADF gate abnormal 2
The ADF does not send the FGATE
761 B
signal within 30 seconds after the
ADF starts scanning.
SM Appendix
Symptom
3-9
SC Tables (F/SPF: D068/D069)
Possible Cause
Defective power supply unit
Defective BICU
Paper jam in the fusing unit.
Loose connection of the exhaust
fan motor
Overload
Defective ADF board
Defective input/output board
Loose connection
Defective ADF connector
Defective SBU board
D067/D068/D069/D072