Kyocera FS-C2026MFP Service Manual page 130

Code Contents
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.
7403 Developing unit M non-
installing error
No density detection signal is
output from toner sensor M in
developing unit M.
7404 Developing unit Y non-
installing error
No density detection signal is
output from toner sensor Y in
developing unit Y.
Causes
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Developing unit K and Drum relay PWB
(YC6)
Drum relay PWB (YC1) and engine PWB
(YC34)
Defective toner Replace the developing unit K (see page 1-
sensor K. 5-18).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-26).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Developing unit C and Drum relay PWB
(YC10)
Drum relay PWB (YC1) and engine PWB
(YC34)
Defective toner Replace the developing unit C (see page 1-
sensor C. 5-18).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-26).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Developing unit M and Drum relay PWB
(YC7)
Drum relay PWB (YC1) and engine PWB
(YC34)
Defective toner Replace the developing unit M (see page 1-
sensor M. 5-18).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-26).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Developing unit Y and Drum relay PWB
(YC13)
Drum relay PWB (YC1) and engine PWB
(YC34)
Defective toner Replace the developing unit Y (see page 1-
sensor Y. 5-18).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-26).
1-4-24
Check procedures/
corrective measures
2KW/2KX