Error - Kyocera FS-1920 Service Manual

2FP/2FY/2FR
Code
6020 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.
Turn power switch off.
Remove and check
harness (S02678)
between fuser board
(KP-1069) and power
supply unit.
Turn power switch on.
Measure voltage at pin
#6 (THERM) of YC831
on fuser board (KP-
1069).
than 3 V DC over 3
Replace fuser unit. See
page 1-6-27.
1-5-10
Contents
STRAT
No
OK?
Yes
Replace harness (S02678)
between fuser board (KP-
1069) and power supply unit.
More
No
seconds?
Yes
Causes
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.
Replace engine board
(KP-1081). See page 1-
6-20.
Remarks
Check procedures/corrective measures
Follow the flow chart below.
CAUTION:
Fuser unit is fed directly by AC
power from primary circuit on
power supply board.
Be careful with electric shock.
NOTE:
If the problem is not solved by
this flow chart replace, the
following items:
Engine board (KP-1081)
Power supply unit
Fuser unit