45584901TH Rev.1
5-41 /
Oki Data CONFIDENTIAL
[F071] Communication initialization error between CU board and PU board
Classification
Error content
Communication related
service call
Communication initialization error between CU board and PU board
Proce-
dure
Check item
Measures
1
LED head, harness
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.
Y color: HEAD1Y
M color: HEAD2M
C color: HEAD3C
K color: HEAD0K
2
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.
3
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 (connector 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
PU board
CU board
LED head
Harness of LED head