Kyocera FS-6970DN Service Manual page 46

2J5
Code
6230 Broken fuser thermistor M wire
The detected temperature of fuser ther-
mistor S is 50
input from fuser thermistor S is 1 less
than 1 (A/D value) continuously for 1.8
second.
Except when the fuser heater is turned
off.
6400 Zero cross signal error
The ZCROSS signal does not reach the
engine PWB for more than 2 s.
7000 Toner motor lock error
A motor over-current signal is detected
continuously for 5 seconds since the
toner motor is activated.
1-4-6
Contents
° °
C/122 F or more and
Causes Check procedures/corrective measures
Poor contact in the Reinsert the connector (See page P.1-5-21).
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.1-5-21).
Fuser thermistor M Check and reinstall if necessary (See page
installed incor- P.1-5-21).
rectly.
Thermal cutout Check for continuity. If none, replace the
triggered. thermal cutout (See page P.1-5-21).
Fuser heater lamp Check and reinstall if necessary (See page
installed incor- P.1-5-17).
rectly.
Broken fuser Check for continuity. If none, replace the
heater lamp wire. fuser heater lamp M (See page P.1-5-17).
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
(YC503), or
improper connec-
tor insertion.
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.1-5-29).
Defective engine Replace the engine PWB (See page P.1-5-
PWB. 23).
Lump of toner Replace the toner container.
inside toner con-
tainer.
Defective toner Replace the developer unit (See page P.1-5-
replenishment 11).
drive system.
Defective toner Replace the developer unit (See page P.1-5-
motor. 11).
Defective engine Replace the engine PWB (See page P.1-5-
PWB. 23).
Remarks