Kyocera ECOSYS FS-4300DN Service Manual page 81

Code Contents
6400 Zero-cross signal error
While fuser heater control is
performed, the zero-cross sig-
nal is not input within 2 s.
7000 Toner motor error
During driving the toner motor,
an over-current detection sig-
nal is detected at intervals of
10 ms as for 300 accumula-
tion.
7100 Toner sensor error
Sensor output value of 930 or
more continuously for 5 s.
7400 Developer unit non-install-
ing error
Sensor output value of 31 or
less continuously for 5 s.
Causes
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Power source PWB (YC3) and engine PWB
(YC1)
Defective power Replace the power source PWB or the
source PWB or engine PWB and check for correct operation
engine PWB. (see page 1-5-22).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Toner motor and drum PWB (YC4)
Drum PWB and relay-L PWB (YC3)
Relay-L PWB and engine PWB (YC2)
Defective toner Replace the toner motor.
motor.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-22).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Toner sensor and drum PWB (YC3)
Drum PWB and relay-L PWB (YC3)
Relay-L PWB and engine PWB (YC2)
Defective toner Replace the developer unit.
sensor. (See Page 1-5-13)
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-22).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Developer unit and drum PWB (YC3)
Drum PWB and relay-L PWB (YC3)
Relay-L PWB and engine PWB (YC2)
Defective toner Replace the developer unit.
sensor. (See Page 1-5-13)
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-22).
1-4-21
2LV/2L1/2L2/2MS/2MT
Check procedures/
corrective measures