Scanner Unit - Kyocera FS-1128MFP Service Manual

Code
3500 CPU - ASIC (CCD PWB) communica-
tion error
An error code is detected.
4000 Polygon motor (laser scanner unit)
error
The polygon motor ready input is not
given for 6 s during the polygon motor is
ON.
4200 BD error (laser scanner unit) error
6000 Broken fuser heater lamp wire
The fuser temperature does not rise
after the fuser heater lamp has been
turned on.
6020 Abnormally high fuser thermistor
temperature
Fuser thermistor detects abnormally
temperature.
Contents
Causes Check procedures/corrective measures
Defective FFC Replace the image scanner unit (ISU) (See
between CCD page 1-5-21).
PWB (YC1) and
control PWB
(YC8).
Defective CCD Replace the CCD PWB.
PWB.
Defective control Replace the control PWB (See page 1-5-
PWB. 39).
Defective harness Reinsert the connector. Also check for conti-
between polygon nuity within the connector harness. If none,
motor and control remedy or replace the harness.
PWB (YC10), or
improper connec-
tor insertion.
Defective laser Replace the laser scanner unit (See page 1-

scanner unit.

5-17).
Defective control Replace the control PWB (See page 1-5-
PWB. 39).
BD sensor does Turn machine power off for at least 30 min-
not detect laser utes, then turn machine on again. If not
beam due to con- cured, replace the laser scanner unit (See
densation on the page 1-5-17).
polygon mirror.
Defective laser Replace the laser scanner unit (See page 1-
scanner unit. 5-17).
Defective control Replace the control PWB (See page 1-5-
PWB. 39).
Poor contact in the Reinsert the connector (See page 1-5-34).
fuser thermistor
connector termi-
nals.
Poor contact in the Reinsert the connector (See page 1-5-34).
fuser heater lamp
connector termi-
nals.
Fuser thermistor Replace the fuser unit (See page 1-5-34).
installed incor-
rectly.
Fuser thermal cut- Replace the fuser unit (See page 1-5-34).
out triggered.
Fuser heater lamp Replace the fuser unit (See page 1-5-34).
installed incor-
rectly.
Broken fuser Replace the fuser unit (See page 1-5-34).
heater lamp wire.
Shorted fuser ther- Replace the fuser unit (See page 1-5-34).
mistor.
Defective control Replace the control PWB (See page 1-5-
PWB. 39).
Remarks
2JN-1
1-4-9