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FC-22 TROUBLESHOOTING 4 - 52 January 2000 © TOSHIBA TEC
4.1.20 Options related service call
F07 Communications error between System-CPU and Main-CPU
1. Check if the SIC board is firmly connected to the MTH board.
2. Check if the IMC board is firmly connected to the MTH board.
3. Check if the IMC board connector J168 is disconnected.
4. Check if the LGC board connector J113 is disconnected.
5. Check if the harness between the IMC and LGC boards is open-circuited.
6. Check the version of FROM on the SIC board.
7. Check the version of MROM on the LGC board.
8. Check the version of IMC-ROM on the IMC board.
9. Replace the SIC board.
10. Replace the IMC board.
11. Replace the LGC board.
F11 Communications error between System-CPU and Scanner-CPU
1. Check if the SIC board connector J182 is disconnected.
2. Check if the SCM board connector J1 is disconnected.
3. Check if the harness between the SIC and SCM boards is open-circuited.
4. Check the version of FROM on the SIC board.
5. Check the version of SROM on the SCM board.
6. Replace the SIC board.
7. Replace the SCM board.