Toshiba e-STUDIO556 Service Manual page 658

[C590] Communication error between Engine-CPU and Laser-CPU
(1) Check if the harness between the LGC board and PLG board is not disconnected or open-
circuited.
(2) Check if the conductor pattern around IC13, IC58, IC125 and CN342 on the LGC board is not
short circuited or open circuited.
(3) Check if the conductor pattern around IC9, IC25, IC32 and CN204 on the PLG board is not short-
or open-circuited.
(4) Check if the connector CN104, CN130, CN133 on the SYS board is disconnected.
(5) Replace the LGC board.
(6) Replace the PLG board.
[F070] Communication error between System-CPU and Engine-CPU (e-STUDIO556/656/756/856)
[F110] Communication error between System-CPU and Scanner-CPU (e-STUDIO556/656/756/
856)
[F111] Scanner response abnormality (e-STUDIO556/656/756/856)
(1) Reproducible confirmation; Turn the power OFF and then back ON using the main power switch.
(2) Check if the connector CN104, CN130, CN131, CN134 on the SYS board is disconnected.
(3) Check if the connector CN10 on the SLG board is disconnected.
(4) Check if the harness connecting the SYS board and SLG board is disconnected or open
circuited.
(5) Check if the harness connecting the SYS board and LGC board is disconnected or open
circuited.
(6) Check if the connection of the SYS board (CN104 and CN130) is open circuited.
(7) 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.)
(8) Check the version of the system ROM on the SYS board.
(9) Check the version of the engine ROM version on the LGC board.
(10) Check the version of the scanner ROM version on the SLG board.
(11) Replace the SYS board.
(12) Replace the SLG board.
(13) Replace the LGC board.
[F070] Communication error between System-CPU and Engine-CPU (e-STUDIO557/657/757/857)
Classification
Communication related service call Communication error between System-CPU and Engine-CPU
Check item
Error code
Check firmware version
Board check
HRNS-LGC-SYS-H100
e-STUDIO556/656/756/856/557/657/757/857
ERROR CODE AND TROUBLESHOOTING
• Turn the power OFF and then back ON using the main power switch,
and then check if the error code changes to another one.
• If it changes to another one, follow the procedure for the changed error
code.
• Check the version of the system firmware on the SYS board.
• Check the version of the system firmware on the LGC board.
• Check if the connector CN102 on the SYS board and the connector
CN342 on the LGC board are completely inserted.
• Check if the connector pin between the SYS board (connector CN102)
and the LGC board (connector CN342) is disconnected.
• Check if the conductor patterns on the LGC board and SYS board are
short circuited or open circuited
• Connector check
• Harness check
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