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January 2000 © TOSHIBA TEC 4 - 33 FC-22 TROUBLESHOOTING
4.1.14 Communications related service call
C57 Communications error between Main-CPU and Sorter-CPU
1. Check if a sorter other than specified is attached.
2. Check the LGC board if any conductor pattern around IC88, IC89, IC96 or J123 is open- or short-
circuited.
3. Check the IPC board for any open- or short-circuited conductor pattern.
4. Check the harness connected to the connector J2 on the IPC board for any disconnected pin or
any open-circuit.
5. Check if the switching power supply fuse F9 is blown out.
6. Check the controller PC board inside the sorter for any open- or short-circuited conductor pattern.
7. Check the connection between the sorter and the copier for any disconnected connector pin or for
any open-circuited harness.
8. Replace the IPC board.
9. Replace the LGC board.