Kyocera DISCOVER FS-3830N, Service Manual

Page: 59 / 176

2FP/2FY/2FR
1-5-9
Code Contents
Remarks
Causes Check procedures/corrective measures
Fuser unit 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.
Blown-out ther-
mistor.
Blown-out heater
lamp.
Defective CPU U1
or comparator U9
on the engine
board.
Improper connec-
tor insertion.
Defective power
supply unit.
Defective harness
between fuser unit
and power supply
unit.
Follow the flow chart below. 6000
Yes
Yes
No
No
No
Remove and check
harness (S02678)
between fuser board
(KP-1069) and power
supply unit, or
thermistor connector
(YC834) on the
fuser board (KP-1069).
0 V DC
at pin #6 (THERM)
of YC831 on fuser board
(KP-1069) ?
Yes
Yes
No
Replace harness (S02678)
between fuser board (KP-
1069) and power supply unit.
OK?
"6000"
shown?
End.
Turn power switch on.
Turn power switch off,
and remove power
cable.
Turn power switch off.
Turn power switch on.
Detach connector CN2
(A) on power supply
board.
Measure resistance
between pins 1 and 3
of the detached
connector.
Replace power supply
unit. See page 1-6-20.
Replace engine board
(KP-1081). See page
1-6-20.
Replace fuser unit. See
page 1-6-27.
Open (infinite)?
CAUTION:
Fuser unit is fed directly by AC power from
primary circuit on power supply board.
Be careful with electric shock.
Fuser unit is extremely hot immediately after
the printer was running. Allow substantial
period of time until it cools down.
See figure right.
(A)
Heater lamp
1
3
Replace fuser unit. See
page 1-6-27.
START