Toshiba DP3500, Service Handbook

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December 2000 © TOSHIBA TEC 5 - 61 DP4500/3500 TROUBLESHOOTING
5.1.11 Communication related service call
[C55] ADF I/F is abnormal
(1) Check if the harness connecting the ADF control board and SLG board is disconnected or open-
circuited.
(2) Check the circuits and connectors on the ADF control board, mainly IC1, IC2, IC5 and CN2 for short-
and open-circuits.
(3) Check the circuits and connectors on the SLG board, mainly IC1, IC5 and J7 for short- or open-
circuits.
(4) Replace the ADF control board.
(5) Replace the SLG board.
[C57] Communication error between main CPU and IPC board
(1) Check the conductor pattern on the LGC board, mainly IC18, IC19, IC21 and J318 for short- and open-
circuits.
(2) Check if the conductor pattern on the IPC board is short- or open-circuited.
(3) Replace the IPC board.
(4) Replace the LGC board.
[C58] Communication error between IPC board and finisher
(1) Check if the specified finisher is attached.
(2) Check if the conductor pattern on the IPC board is short- or open-circuited.
(3) Check if the connector pins connected to the connector J2 on the IPC board are disconnected or the
harness is open-circuited.
(4) Check if the conductor pattern on the finisher controller PC board is short- or open-circuited.
(5) Check the connections between the finisher and the copier if the connector pins are disconnected, or
the harnesses are open-circuited.
(6) Replace the IPC board.
(7) Replace the LGC board.