2KA
1-4-40
C6230 Fuser thermistor 1 edge break error
Fuser thermistor 1 detects a temperature
of 40
C/104 F or lower for 30 s.
Defective fuser
heater 1.
Check for continuity across each heater. If
none, replace the fuser unit (see page 1-5-
31).
Installation defec-
tiveness on fuser
thermistor 1.
Measure the resistance. If it is , replace
the fuser unit (see page 1-5-31).
Defective PWB. Replace the power source PWB or engine
PWB and check for correct operation.
C6400 Zero-cross signal error
While fuser heater ON/OFF control is
performed, the zero-cross signal is not
input within 3 s.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC4 on
the engine PWB and the connector YC10 on
the power source PWB, and the continuity
across the connector terminals. Repair or
replace if necessary.
Defective PWB. Replace the engine PWB or power source
PWB and check for correct operation.
C6410 Fuser unit type mismatch problem
Absence of the fuser unit is detected.
Fuser unit connec-
tor inserted incor-
rectly.
Reinsert the fuser unit connector if neces-
sary.
Different type of
the fuser unit is
installed.
Install the correct fuser unit.
C7000 Toner motor problem
After driving of the toner motor starts, the
error signal is not at the H level for 500
ms continuously.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC26 on
the engine PWB and the connector of the
toner motor, and the continuity across the
connector terminals. Repair or replace if
necessary.
Broken the gear. Check visually and replace the gear if nec-
essary.
Defective toner
motor M/C/Y/K.
Run maintenance item U135 and check if
the toner motor operates. If not, replace the
toner motor.
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation.
C7100 Toner container motor error
The rated speed achievement signal
does not turn to L within 2 s since toner
container motor is activated.
The rated speed achievement signal is
at the H level for 1 s continuously after
toner container motor is stabilized.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC26 on
the engine PWB and the connector on the
toner container motor, and the continuity
across the connector terminals. Repair or
replace if necessary.
Defective drive
transmission sys-
tem.
Check if the rollers and gears rotate
smoothly. If not, grease the bushings and
gears. Check for broken gears and replace if
any.
Defective toner
container motor.
Run maintenance item U030 and check if
the toner container motor operates when
YC26-A7 (remote signal) on the engine
PWB goes low. If not, replace the toner con-
tainer motor.
Defective engine
PWB.
Run maintenance item U030 and check if
YC26-A7 (remote signal) on the engine
PWB goes low. If not, replace the engine
PWB.
Code Contents
Remarks
Causes Check procedures/corrective measures
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