Kyocera FS-2020D Service Manual page 45

Code
4000 Polygon motor (laser scanner unit)
error
POLRDYN signal does not go low within
10 s after POLONN signal goes low.
4200 Laser output (pin photo sensor) error
The pin photo signal (PDN) is not output
within a specified time after the polygon
motor ready signal (POLRDYN)
becomes ready (L level).
5100 Short-circuited main charger output
Five pages have been printed with the
main charger output short-circuited.
Contents
Causes Check procedures/corrective measures
Defective harness Reinsert the connector. Also check for conti-
between polygon nuity within the connector harness. If none,
motor and main remedy or replace the harness.
PWB (YC11), or
improper connec-
tor insertion.
Defective harness Reinsert the connector. Also check for conti-
between main PWB nuity within the connector harness. If none,
(YC12) and engine remedy or replace the harness.
PWB (YC12), or
improper connector
insertion.
Defective laser Replace the laser scanner unit (See page 1-
scanner unit. 5-38).
Defective engine Replace the engine PWB (See page 1-5-
PWB. 25).
Defective main Replace the main PWB (See page 1-5-25).
PWB.
Defective harness Reinsert the connector. Also check for conti-
between PD PWB nuity within the connector harness. If none,
(YC1) and main remedy or replace the harness.
PWB (YC16), or
improper connec-
tor insertion.
Defective APC Replace the laser scanner unit (See page 1-
PWB. 5-38).
Defective PD Replace the laser scanner unit (See page 1-
PWB. 5-38).
Defective main Replace the main PWB (See page 1-5-30).
PWB.
Drum unit installed Verify harness is not pinched in the drum
incorrectly. unit.
Engine PWB Verify harness is not pinched in the engine
installed incor- PWB.
rectly.
Defective engine Replace the engine PWB (See page 1-5-
PWB. 25).
Remarks
2J0/2J1/2J2
1-4-5