7-40
Troubleshooting ＞ Self-diagnostic function
[CONFIDENTIAL]
6120 Abnormally high fuser thermistor 1
temperature
The detection temperature of fuser
thermistor 1 is higher than 245°C/
473°F.
In a heater-off state, the detection
temperature of fuser thermistor 1 is
higher than 195°C/383°F after the
detection temperature of fuser
thermistor 1 was 155°C/311°F or
less.
Deformed connector
pin.
See page 7-39.
Defective triac. See page 7-39
.
Shorted fuser
thermistor.
Replace the fuser unit.
Defective engine PWB. Replace the engine PWB and check for correct
operation.
6130 Broken fuser thermistor 1 wire
A/D value of the fuser thermistor 1
exceeds 1019 bit continuously for 4 s
during warming up.
Defective connector
cable or poor contact in
the connector.
Reinsert the connector. Also check for continuity within
the connector cable. If none, replace the cable.
Fuser thermistor and fuser thermistor connect
PWB(YC1)
Fuser thermistor connect PWB(YC3) and engine PWB
(YC21)
Deformed connector
pin.
See page 7-39
.
Defective triac. See page 7-39
.
Defective fuser
thermistor.
Replace the fuser unit.
Defective engine PWB. Replace the engine PWB and check for correct
operation.
6400 Zero-cross signal error
While fuser heater control is
performed, the zero-cross signal is
not input within 2 s.
Defective connector
cable or poor contact in
the connector.
Reinsert the connector. Also check for continuity within
the connector cable. If none, replace the cable.
Power source PWB (YC3) and engine PWB (YC1)
Defective power source
PWB or engine PWB.
Replace the power source PWB or the engine PWB
and check for correct operation.
7100 Toner sensor error
Sensor output value of 930 or more
continuously for 5 s.
Defective connector
cable or poor contact in
the connector.
Reinsert the connector. Also check for continuity within
the connector cable. If none, replace the cable.
Toner sensor and drum PWB (YC3)
Drum connect PWB(YC2) and relay-L PWB (YC3)
Relay-L PWB(YC1) and engine PWB (YC2)
Defective toner sensor. Replace the developer unit.
Defective engine PWB. Replace the engine PWB and check for correct
operation.
7400 Developer unit non-installing error
Sensor output value of 31 or less
continuously for 5 s.
Defective connector
cable or poor contact in
the connector.
Reinsert the connector. Also check for continuity within
the connector cable. If none, replace the cable.
Toner sensor and drum PWB (YC3)
Drum connect PWB(YC2) and relay-L PWB (YC3)
Relay-L PWB(YC1) and engine PWB (YC2)
Defective toner sensor. Replace the developer unit.
Defective engine PWB. Replace the engine PWB and check for correct
operation.
Code Contents Causes Check procedures/
corrective measures
To Next Page
Loading...
