2RV/2RW/2RX/2RY/3RA-3
7-87
C6650: Thermopile EEPROM error
The thermopile EEPROM cannot be accessed.
2 Checking the fuser pres-
sure release operation
The fuser press-release
does not operate properly.
Manually reverse-rotate the
fuser gear to check if the
fuser pressure is decreased.
If not, replace the fuser unit.
3 Reattaching the fuser
pressure release sensor
The fuser press-release
sensor is not properly
attached.
Check the fuser pressure
release sensor is photo-inter-
rupted by the actuator when
decreasing the pressure. If
not, reattach the fuser pres-
sure release sensor.
4 Checking the connection The connector is not prop-
erly connected or the wire
is faulty.
Clean the terminal of the fol-
lowing wire connectors and
reconnect the connectors. If
there is no continuity, replace
the wire.
• Fuser unit (Fuser pressure
release sensor) - Main/
engine PWB (YC19)
• Fuser pressure release
motor - Main/engine PWB
(YC1)
5 Replacing the fuser pres-
sure release motor
The fuser pressure release
motor does not operate
properly.
Replace the fuser pressure
release motor.
6 Replacing the fuser unit The internal parts of the
fuser unit such as the fuser
press-release sensor are
faulty.
Replace the fuser unit.
7 Replacing the main/engine
PWB
The main/engine PWB is
faulty.
Replace the main/engine
PWB.
Step Check description Assumed cause Measures Reference
1 Changing the external
power source
The power supply voltage
reduces.
If the supply power voltage
drops exceeding 10% of
rated voltage or multiple tap
is used, change the power
supply.
2 Checking the connection The connector is not prop-
erly connected or the wire
is faulty.
Clean the terminal of the fol-
lowing wire connectors and
reconnect the connectors. If
there is no continuity, replace
the wire.
• Thermopile - Main/engine
PWB (YC2)
3 Replacing the thermopile The thermopile is faulty. Replace the thermopile.
Step Check description Assumed cause Measures Reference
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