Codes C7404 - C7800 - Kyocera TASKalfa 250ci Service Manual

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