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© 2008-2011 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO5520C/6520C/6530C
ERROR CODE and TROUBLESHOOTING
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[C370] Transfer belt motor abnormality
(1) Check if the connector of the transfer belt unit is not disconnected.
(2) Is the transport belt unit working normally?
(3) Check if the connector of the transfer belt motor is not disconnected.
(4) Check if the connector CN311 on the LGC board is disconnected.
(5) Check if the fuse on the switching regulator has blown.
(6) Check if the transfer belt release detection sensor is working properly.
(7) Replace the transfer belt motor.
(8) Replace the LGC board.
[C380] Auto-toner sensor (K) abnormality (upper limit)
[C381] Auto-toner sensor (K) abnormality (lower limit)
[C382] Auto-toner sensor (K) connection error
[C390] Auto-toner sensor (C) abnormality (upper limit)
[C391] Auto-toner sensor (C) abnormality (lower limit)
[C392] Auto-toner sensor (C) connection error
[C3A0] Auto-toner sensor (M) abnormality (upper limit)
[C3A1] Auto-toner sensor (M) abnormality (lower limit)
[C3A2] Auto-toner sensor (M) connection error
[C3B0] Auto-toner sensor (Y) abnormality (upper limit)
[C3B1] Auto-toner sensor (Y) abnormality (lower limit)
[C3B2] Auto-toner sensor (Y) connection error
(1) Check if there is any abnormality on the connector between the equipment and the EPU tray of
the process unit. (05-2788)
(2) Check if the process unit (EPU tray) is securely installed.
(3) Check if the harnesses between the connectors (CN550, CN551, CN555) on the EPU board, the
drawer connectors for the LGC board of the EPU tray, and the connector of the LGC board are
disconnected or open-circuited.
(4) Check if the harnesses between the connectors (CN553, CN554, CN555, and CN556) and the
auto toner sensor are disconnected or open-circuited.
(5) Replace the auto-toner sensor.
(6) Replace the EPU board.
(7) Replace the LGC board.
[C3C0] Process unit (EPU tray) connection error
(1) Check if there is any abnormality on the connector between the equipment and the EPU tray of
the process unit. (05-2788)
(2) Check if the process unit (EPU tray) is securely installed.
(3) Check if the connector (CN551) on the EPU board, the drawer connectors for the EPU tray and
the LGC board, and the harness between the connectors CN308 and CN310 are disconnected
or open-circuited.
(4) Check if the harnesses between the connectors (CN553, CN554, CN555, and CN556) and the
auto toner sensor are disconnected or open-circuited.
(5) Replace the EPU board.
(6) Replace the LGC board.
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