Kyocera FS-6950DN Service Manual page 51

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