Kyocera FS-6970DN - Page 44

2J5
1-4-4
4000 Polygon motor (laser scanner unit)
error
POLRDYN signal does not go low within
10 s after POLONN signal goes low.
Defective harness
between polygon
motor and main
PWB (YC11), or
improper connec-
tor insertion.
Reinsert the connector. Also check for conti-
nuity within the connector harness. If none,
remedy or replace the harness.
Defective harness
between main
PWB (YC12) and
engine PWB
(YC12), or
improper connec-
tor insertion.
Reinsert the connector. Also check for conti-
nuity within the connector harness. If none,
remedy or replace the harness.
Defective laser
scanner unit.
Replace the laser scanner unit (See page
P.1-5-35).
Defective engine
PWB.
Replace the engine PWB (See page P.1-5-
23).
Defective main
PWB.
Replace the main PWB (See page P.1-5-
27).
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).
Defective harness
between PD PWB
(YC1) and main
PWB (YC16), or
improper connec-
tor insertion.
Reinsert the connector. Also check for conti-
nuity within the connector harness. If none,
remedy or replace the harness.
Defective APC
PWB.
Replace the laser scanner unit (See page
P.1-5-35).
Defective PD
PWB.
Replace the laser scanner unit (See page
P.1-5-35).
Defective main
PWB.
Replace the main PWB (See page P.1-5-
27).
5100 Short-circuited main charger output
Five pages have been printed with the
main charger output short-circuited.
Drum unit installed
incorrectly.
Verify harness is not pinched in the drum
unit.
Engine PWB
installed incor-
rectly.
Verify harness is not pinched in the engine
PWB.
Defective engine
PWB.
Replace the engine PWB (See page P.1-5-
23).
Code Contents
Remarks
Causes Check procedures/corrective measures