Kyocera ECOSYS FS-6950DN, Service Manual

Page: 51 / 128

2F7-5
1-4-5
6030 Broken fuser thermistor M wire
Input from fuser thermistor M is less than
1 (A/D value) for more than 3 s.
Poor contact in the
fuser thermistor M
connector termi-
nals. Reinsert the connector (See page P.1-5-20).
Broken fuser ther-
mistor M wire. Measure the resistance. If it is
∞ Ω
, replace
the fuser thermistor M (See page P.1-5-20).
Fuser thermistor M
installed incor-
rectly. Check and reinstall if necessary (See page
P.1-5-20).
Thermal cutout
triggered. Check for continuity. If none, replace the
thermal cutout (See page P.1-5-20).
Fuser heater lamp
M installed incor-
rectly. Check and reinstall if necessary (See page
P.1-5-16).
Broken fuser
heater lamp M
wire. Check for continuity. If none, replace the
fuser heater lamp M (See page P.1-5-16).
6100 Broken fuser heater lamp S wire
After changing to fuser thermistor S,
input from of fuser thermistor S control
temperature compared to 10
°
C/18
°
F
was low in 5 s.
Fuser heater lamp
S installed incor-
rectly. Check and reinstall if necessary (See page
P.1-5-16).
Broken fuser
heater lamp S wire. Check for continuity. If none, replace the
fuser heater lamp S (See page P.1-5-16).
6120 Abnormally high fuser thermistor S
temperature
The temperature of the fuser thermistor
S detects 250
°
C/482
°
F or more continu-
ously for 3 s.
Shorted fuser ther-
mistor S. Measure the resistance. If it is 0
Ω
, replace
the fuser thermistor S (See page P.1-5-20).
Defective engine
PWB. Replace the engine PWB (See page P.1-5-
22).
6130 Broken fuser thermistor S wire
Input from fuser thermistor S is less than
1 (A/D value) for more than 1 s.
Poor contact in the
fuser thermistor S
connector terminals. Reinsert the connector (See page P.1-5-20).
Broken fuser ther-
mistor S wire. Measure the resistance. If it is
∞ Ω
, replace
the fuser thermistor S (See page P.1-5-20).
Fuser thermistor S
installed incor-
rectly. Check and reinstall if necessary (See page
P.1-5-20).
6400 Zero cross signal error
The ZCROSS signal does not reach the
engine PWB for more than 2 s.
Defective harness
between connect-L
PWB (YC8) and
engine PWB
(YC3), or improper
connector inser-
tion. Reinsert the connector. Also check for conti-
nuity within the connector harness. If none,
remedy or replace the harness.
Defective connec-
tion between
power source unit
(YC103) and con-
nect-L PWB (YC1). Reinsert the connector.
Defective power
source unit. Replace the power source unit (See page
P.1-5-28).
Defective engine
PWB. Replace the engine PWB (See page P.1-5-
22).
Code Contents
Remarks
Causes Check procedures/corrective measures