2MV
1-4-32
7402 Developer unit C type mis-
match error
Absence of the developer unit
C is detected.
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.
Developer unit C and drum connect PWB
(YC7)
Drum connect PWB and engine PWB (YC4)
Different type of
the developer unit
is installed.
Install the correct developer unit
(see page 1-5-14).
7403 Developer unit M type mis-
match error
Absence of the developer unit
M is detected.
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.
Developer unit M and drum connect PWB
(YC8)
Drum connect PWB and engine PWB (YC4)
Different type of
the developer unit
is installed.
Install the correct developer unit
(see page 1-5-14).
7404 Developer unit Y type mis-
match error
Absence of the developer unit
Y is detected.
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.
Developer unit Y and drum connect PWB
(YC6)
Drum connect PWB and engine PWB (YC4)
Different type of
the developer unit
is installed.
Install the correct developer unit
(see page 1-5-14).
7411
Drum unit K type mismatch
problem
Absence of the drum unit K is
detected.
Drum unit connec-
tor inserted incor-
rectly.
Reinsert the drum unit K connector if neces-
sary.
Different type of
the drum unit is
installed.
Install the correct drum unit
(see page 1-5-16).
7412
Drum unit C type mismatch
problem
Absence of the drum unit C is
detected.
Drum unit connec-
tor inserted incor-
rectly.
Reinsert the drum unit C connector if neces-
sary.
Different type of
the drum unit is
installed.
Install the correct drum unit
(see page 1-5-16).
7413
Drum unit M type mismatch
problem
Absence of the drum unit M is
detected.
Drum unit connec-
tor inserted incor-
rectly.
Reinsert the drum unit M connector if neces-
sary.
Different type of
the drum unit is
installed.
Install the correct drum unit
(see page 1-5-16).
Code Contents Causes
Check procedures/
corrective measures