Kyocera ECOSYS FS-4300DN Service Manual

2LV/2L1/2L2/2MS/2MT
1-4-22
7410 Drum unit type mismatch
error
The drum PWB EEPROM
does not communicate
normally.
Absence of the drum unit
is detected.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Drum unit and drum connect PWB (YC1)
Drum connect PWB and relay-L PWB (YC3)
Relay-L PWB and engine PWB (YC2)
Defective toner
sensor.
Replace the drum unit.
(See Page 1-5-13)
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-22).
7800 Broken external thermistor
wire
The average of thermistor out-
put value of 1016 or more
continuously for 160 ms.
The average of thermistor out-
put value of 930 or more con-
tinuously for 5 s.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Operation PWB and engine PWB (YC17)
Defective tempera-
ture sensor.
Replace the operation PWB.
7810 Short-circuited external
thermistor wire
The average of thermistor out-
put value of 31 or less contin-
uously for 5 s.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Operation PWB and engine PWB (YC17)
Defective tempera-
ture sensor.
Replace the operation PWB.
7900 Drum unit EEPROM error
No response is issued from
the device in reading/writing
for 5 ms or more and this
problem is repeated five times
successively.
Mismatch of reading data from
two locations occurs eight
times successively.
Mismatch between writing
data and reading data occurs
eight times successively.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Drum unit and drum connect PWB (YC1)
Drum connect PWB and relay-L PWB (YC3)
Relay-L PWB and engine PWB (YC15)
Defective drum
unit.
Replace the drum unit (see 1-5-15).
Code Contents Causes
Check procedures/
corrective measures

Kyocera ECOSYS FS-4300DN Specifications

General

Brand	Kyocera
Model	ECOSYS FS-4300DN
Category	All in One Printer
Language	English