2JZ/2JX/2JV/2H7-1
1-4-48
C7404 Developing unit Y type mismatch
problem
Absence of the developing unit Y is
detected.
Developing unit
connector inserted
incorrectly.
Reinsert the developing unit connector if
necessary.
Different type of
the developing unit
is installed.
Install the correct developing unit.
C7411 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 connector if neces-
sary.
Different type of
the drum unit is
installed.
Install the correct drum unit.
C7412 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 connector if neces-
sary.
Different type of
the drum unit is
installed.
Install the correct drum unit.
C7413 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 connector if neces-
sary.
Different type of
the drum unit is
installed.
Install the correct drum unit.
C7414 Drum unit Y type mismatch problem
Absence of the drum unit Y is detected.
Drum unit connec-
tor inserted incor-
rectly.
Reinsert the drum unit connector if neces-
sary.
Different type of
the drum unit is
installed.
Install the correct drum unit.
C7420 Transfer belt unit type mismatch
problem
Absence of the transfer belt unit is
detected.
Transfer belt unit
connector inserted
incorrectly.
Reinsert the transfer belt unit connector if
necessary.
Different type of
the transfer belt
unit is installed.
Install the correct transfer belt unit.
C7800 Broken external thermistor wire
An abnormal value is detected in the
input data to the outer temperature sen-
sor.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC1 on
the main front PWB and the continuity
across the connector terminals. Repair or
replace if necessary.
Defective PWB. Replace the main front PWB or engine PWB
and check for correct operation.
Code Contents
Remarks
Causes Check procedures/corrective measures
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