45584901TH Rev.1
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Oki Data CONFIDENTIAL
5.3.4
Communication related service call
[F070] Communication error between CU board and PU board
Classification
Error content
Communication related
service call
Communication error between CU board and PU board
Check item
Measures
Error code
• 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 firmware version
• Check the version of the system firmware on the CU board.
• Check the version of the PU firmware on the PU board.
Board check
• Check if the connector CN118, CN119 on the CU board and the
connector CUIF0, CUIF1 on the PU board are completely inserted.
• Check if the connector pin between the CU board (connector CN118,
CN119) and the PU board (CUIF0, CUIF1) is disconnected.
• Check if the connectors HEAD0K, HEAD1Y, HEAD2M, and HEAD3C
of the LED head are completely inserted, and the harness is
disconnected or open circuited.
• Check if the conductor patterns on the PU board and CU board are
short circuited or open circuited
Parts to be replaced
Remark
CU board
PU board
LED head