Kyocera FS-6950DN Service Manual page 50

2F7-5
Code
4200 Laser output (pin photo sensor) error
The pin photo signal (PDN) is not output
within a specified time after the polygon
motor ready signal (POLRDYN)
becomes ready (L level).
5100 Short-circuited main charger output
Five pages have been printed with the
main charger output short-circuited.
6000 Broken fuser heater lamp M wire
The temperature does not reach 100
°
212 F after the fuser heater lamp M has
been turned on continuously for 30 s.
The fuser thermistor M detection
temperature does not rise by 1
after the fuser heater lamp M has been
turned on continuously for 15 s during
warm-up or at standby.
The fuser thermistor S detection
temperature does not rise by 1
after the fuser heater lamp M has been
turned on continuously for 10 s during
warm-up or at standby.
The temperature does not rise by 1
°
1.8 F after the fuser heater lamp M has
been turned on continuously for 5 s dur-
ing printing.
6020 Abnormally high fuser thermistor M
temperature
The temperature of the fuser thermistor
M detects 250
ously for 3 s.
1-4-4
Contents
°
C/
° °
C/1.8 F
° °
C/1.8 F
°
C/
° °
C/482 F or more continu-
Causes Check procedures/corrective measures
Defective harness Reinsert the connector. Also check for conti-
between PD PWB nuity within the connector harness. If none,
(YC1) and main remedy or replace the harness.
PWB (YC12), or
improper connec-
tor insertion.
Defective APC Replace the laser scanner unit (See page
PWB. P.1-5-32).
Defective PD Replace the laser scanner unit (See page
PWB. P.1-5-32).
Defective main Replace the main PWB (See page P.1-5-
PWB. 26).
Drum unit installed Verify harness is not pinched in the drum
incorrectly. unit.
Engine PWB Verify harness is not pinched in the engine
installed incor- PWB.
rectly.
Defective engine Replace the engine PWB (See page P.1-5-
PWB. 22).
Poor contact in the Reinsert the connector (See page P.1-5-20).
fuser thermistor M
connector termi-
nals.
Fuser thermistor M Check and reinstall if necessary (See page
installed incor- P.1-5-20).
rectly.
Thermal cutout Check for continuity. If none, replace the
triggered. thermal cutout (See page P.1-5-20).
Fuser heater lamp Check and reinstall if necessary (See page
M installed incor- P.1-5-20).
rectly.
Broken fuser Check for continuity. If none, replace the
heater lamp M fuser heater lamp M (See page P.1-5-16).
wire.
Measure the resistance. If it is 0 Ω, replace
Shorted fuser ther-
mistor M. the fuser thermistor M (See page P.1-5-20).
Defective engine Replace the engine PWB (See page P.1-5-
PWB. 22).
Remarks