Communication Related Service Call; Communication Initialization Error Between Sys Board And Pu Board - Toshiba e-STUDIO477S Service Manual

5.3.4

Communication related service call

[F070] Communication error between SYS board and PU board
Classification
Communication related service
call
Check item
Error code
Check firmware version
Board check
Parts to be replaced
SYS board
PU board
LED head
[F071] Communication initialization error between SYS board and PU board
Classification
Communication related service
call
Procedure Check item
1 LED head, harness
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Error content
Communication error between SYS board and PU board
Measures
• 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 PU firmware on the PU board.
• Check if the connector CN118, CN119 on the SYS board and the
connector CUIF0, CUIF1 on the PU board are completely
inserted.
• Check if the connector pin between the SYS board (connector
CN118, CN119) and the PU board (CUIF0, CUIF1) is
disconnected.
• Check if the connector HEAD0K of the LED head is completely
inserted, and the harness is disconnected or open circuited.
• Check if the conductor patterns on the PU board and SYS board
are short circuited or open circuited
Remark
Communication initialization error between SYS board and PU
board
1-1. Disconnect all the harnesses of the LED heads, and
then turn the power ON. Check if the error changes to
another service call. (HEAD0K, HEAD1Y, HEAD2M,
HEAD3C)
1-2. If the error does not change to another service call in
step 1-1, go to step 2. If the error changes to another
service call, follow the steps below.
1-3. Connect the harnesses of the LED head to the PU
board single color at a time, and then turn the power ON
to identify the LED head in error. Check if F071 occurs.
Place the parts causing the error.
K color: HEAD0K
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Error content
Measures
e-STUDIO477S/527S/477SL
ERROR CODE AND TROUBLESHOOTING
5