7004 Toner Motor Y Error; 7401 Developing Unit K Non-Installing Error; 7402 Developing Unit C Non-Installing Error - Kyocera FS-C5350DN Service Manual

2K8
Code
7004 Toner motor Y error
When the toner motor Y is driven, the
toner motor Y over-current detection sig-
nal is detected continuously for 50 times
(5 s) at 100 ms intervals.
7401 Developing unit K non-installing error
No density detection signal is output
from toner sensor K in developing unit K.
7402 Developing unit C non-installing error
No density detection signal is output
from toner sensor C in developing unit C.
1-4-16
Contents
Causes Check procedures/corrective measures
Defective harness Reinsert the connector. Also check for conti-
between toner nuity within the connector harness. If none,
motor Y and remedy or replace the harness.
engine PWB
(YC23), or
improper connec-
tor insertion.
Defective drive Check if the gears rotate smoothly. If not,
transmission grease the bushings and gears. Check for
system of the toner broken gears and replace if any.
motor Y.
Defective toner Replace the toner motor Y.
motor Y.
Defective engine Replace the engine PWB (See page 1-5-
PWB. 29).
Faulty connection Check the installation of the developing unit
of the connector K and drum relay PWB and reinstall them if
between the devel- necessary (See page 1-5-14).
oping PWB K and
drum relay PWB.
Defective harness Reinsert the connector. Also check for conti-
between drum nuity within the connector harness. If none,
relay PWB (YC1) remedy or replace the harness.
and engine PWB
(YC34), or
improper connec-
tor insertion.
Defective toner Replace the developing unit K (See page 1-
sensor K. 5-12).
Defective engine Replace the engine PWB (See page 1-5-
PWB. 29).
Faulty connection Check the installation of the developing unit
of the connector C and drum relay PWB and reinstall them if
between the devel- necessary (See page 1-5-14).
oping PWB C and
drum relay PWB.
Defective harness Reinsert the connector. Also check for conti-
between drum nuity within the connector harness. If none,
relay PWB (YC1) remedy or replace the harness.
and engine PWB
(YC34), or
improper connec-
tor insertion.
Defective toner Replace the developing unit C (See page 1-
sensor C. 5-12).
Defective engine Replace the engine PWB (See page 1-5-
PWB. 29).
Remarks