Toshiba e-STUDIO556 Service Manual page 604

[F111] Scanner response abnormality
(1) Check if the connector CN104, CN130, CN131, CN134 on the SYS board is disconnected.
(2) Check if the connector CN10 on the SLG board is disconnected.
(3) Check if the harness connecting the SYS board and SLG board is disconnected or open
circuited.
(4) Check if the harness connecting the SYS board and LGC board is disconnected or open
circuited.
(5) Check if the connection of the SYS board (CN104 and CN130) is open circuited.
(6) If the SYS board has been replaced, check if the jumper pin setting on the SYS board is correct.
(The jumper pin should be inserted between pin 2 and 3 of CN103 and CN115.)
(7) Check the version of the system ROM on the SYS board.
(8) Check the version of the engine ROM version on the LGC board.
(9) Check the version of the scanner ROM version on the SLG board.
(10) Replace the SYS board.
(11) Replace the SLG board.
(12) Replace the LGC board.
e-STUDIO556/656/756/856(Ver03)
ERROR CODE AND TROUBLESHOOTING
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