Kyocera FS-C2026MFP

2KW/2KX
1-4-24
7401 Developing unit K non-
installing error
No density detection signal is
output from toner sensor K in
developing unit K.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Developing unit K and Drum relay PWB
(YC6)
Drum relay PWB (YC1) and engine PWB
(YC34)
Defective toner
sensor K.
Replace the developing unit K (see page 1-
5-18).
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-26).
7402 Developing unit C non-
installing error
No density detection signal is
output from toner sensor C in
developing unit C.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Developing unit C and Drum relay PWB
(YC10)
Drum relay PWB (YC1) and engine PWB
(YC34)
Defective toner
sensor C.
Replace the developing unit C (see page 1-
5-18).
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-26).
7403 Developing unit M non-
installing error
No density detection signal is
output from toner sensor M in
developing unit M.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Developing unit M and Drum relay PWB
(YC7)
Drum relay PWB (YC1) and engine PWB
(YC34)
Defective toner
sensor M.
Replace the developing unit M (see page 1-
5-18).
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-26).
7404 Developing unit Y non-
installing error
No density detection signal is
output from toner sensor Y in
developing unit Y.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Developing unit Y and Drum relay PWB
(YC13)
Drum relay PWB (YC1) and engine PWB
(YC34)
Defective toner
sensor Y.
Replace the developing unit Y (see page 1-
5-18).
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-26).
Code Contents Causes
Check procedures/
corrective measures