2FP/2FY/2FR
1-5-10
Code Contents
Remarks
Causes Check procedures/corrective measures
Abnormal high temperature error
• HTEMP* remains high for longer than 4
seconds since the heater lamp is on. The
heater lamp continues to be turn on for
longer than 60 seconds.
Defective CPU U1
or comparator U9
on the engine
board.
Defective engine
board (KP-1081).
Defective ther-
mistor.
Defective photo
coupler on the
power supply unit
for the heater
lamp.
Follow the flow chart below.
6020
No
Remove and check
harness (S02678)
between fuser board
(KP-1069) and power
supply unit.
Yes
Yes
No
Replace harness (S02678)
between fuser board (KP-
1069) and power supply unit.
OK?
STRAT
Replace engine board
(KP-1081). See page 1-
6-20.
Replace fuser unit. See
page 1-6-27.
CAUTION:
Fuser unit is fed directly by AC
power from primary circuit on
power supply board.
Be careful with electric shock.
Measure voltage at pin
#6 (THERM) of YC831
on fuser board (KP-
1069).
Turn power switch off.
Turn power switch on.
More
than 3 V DC over 3
seconds?
NOTE:
If the problem is not solved by
this flow chart replace, the
following items:
Engine board (KP-1081)
Power supply unit
Fuser unit
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