2A3/4
3-5-13
Code Contents
Remarks
Causes
Check procedures/
corrective measures
Fixing unit
heater M or S
installed incor-
rectly.
Broken fixing
unit heater M or
S wire.
Poor contact of
the fixing unit
thermistor con-
nector termi-
nals.
Broken fixing
unit thermistor
wire.
Fixing unit ther-
mistor installed
incorrectly.
Fixing unit ther-
mostat trig-
gered.
Fixing unit
heater M or S
installed incor-
rectly.
Broken fixing
unit heater M or
S wire.
Check and reinstall if neces-
sary.
Check for continuity. If none,
replace the fixing unit heater
M or S.
Check the connection of con-
nector CN3-B8 on the engine
PCB and the continuity across
the connector terminals. Re-
pair or replace if necessary.
Measure the resistance. If it is
infinite, replace the fixing unit
thermistor.
Check and reinstall if neces-
sary.
Check for continuity. If none,
replace the fixing unit thermo-
stat.
Check and reinstall if neces-
sary.
Check for continuity. If none,
replace the fixing unit heater
M or S.
C610
C620
Broken fixing unit ther-
mistor wire
• The fixing temperature
does not increase for 40 s
after the fixing heaters
have been turned on for
warming up.
• The fixing temperature re-
mains below 50˚C/122˚F
for 10 s continuously after
the fixing heaters have
been turned on during sta-
bilization.
Abnormally low fixing
temperature
• The fixing temperature re-
mains below 120˚C/248˚F
for 10 s.
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