5300-Eraser Disconnection Detection; 6000-Fuser Unit Error; 6020-Abnormal High Temperature Error - Kyocera Mita FS-6750 Service Manual

5300—Eraser disconnection detection
Table 6. 12 5300 error
Meaning
The eraser disconnection
detection signal is effective
more than a certain time
after the ERASER signal has
been output by the engine
board.
6000—Fuser unit error
Table 6. 13 6000 error
Meaning
The thermistor is discon-
nected more than a certain
time after the heater has
been turned on. The status in
which the heater is to be
turned on continues more
than a certain time.
6020—Abnormal high temperature error
Table 6. 14 6020 error
Meaning
The engine board has
detected an abnormal tem-
perature of thermistor.
Suggested causes
• Defective engine board
(KP-904).
• Defective drum unit.
• Defective harness
(S02007) between engine
board and drum relay
board.
• Defective drum unit
installation.
Suggested causes
• Defective engine board
(KP-904).
• Blown-out thermistor.
• Blown-out heater lamp.
• Defective fuser board (KP-
499).
• Defective power supply
unit.
• Defective harness
(S02252) between engine
board and fuser board.
• Defective harness
between fuser unit and
power supply unit or on
the fuser board.
Suggested causes
• Defective engine board
(KP-904).
• Defective thermistor.
• Defective power supply
unit.
6-14
Troubleshooting
Diagnostic
Corrective action
Replace the engine board
(KP-904).
Replace the drum unit.
Replace harness (S02007).
Reinstall the drum unit care-
fully.
Corrective action
Replace the engine board
(KP-904).
Replace the fuser unit.
Replace the fuser unit.
Replace the fuser unit.
Replace the power supply
unit.
Replace harness (S02252).
Replace harness.
Corrective action
Replace the engine board
(KP-904).
Replace the fuser unit.
Replace the power supply
unit.
FS-6750