Kyocera FS-6025MFP/B Service Manual page 140

Code Contents
7810 Short-circuited external
thermistor wire
The thermistor output value is
3 V or more.
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.
7910 Developer 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.
8030 Tray upper limit detection
problem (document fin-
isher)
When the tray elevation motor
raises a tray, the ON status of
the tray upper limit sensor is
detected.
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. Temperature sensor and engine PWB
(YC21)
Defective tempera- Replace the temperature sensor.
ture sensor.
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. Drum unit and engine PWB (YC15)
Defective drum Replace the drum unit (see 1-5-19).
unit.
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 engine PWB (YC12
Defective devel- Replace the developer unit (see 1-5-16).
oper unit.
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. Tray upper limit sensor and DF main PWB
(CN5)
Paper surface sensor 1/2 and DF main PWB
(CN6)
Defective tray Replace the sensor.
upper limit sensor,
paper surface sen-
sor 1/2.
Defective DF main Replace the DF main PWB and check for
PWB. correct operation.
1-4-16
Check procedures/
corrective measures
2K3/2L3