Lexmark Optra E Service Manual - Page 46

Fuse F1 continues to open after being replaced, cables connected to the engine board

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4026-0XX Fuse F1 continues to open after being replaced FRU 1 Fuse F1 Action If fuse F1 continues to open after being replaced, disconnect CN7 from the engine board and turn the printer power on. If F1 opens, replace the LVPS. If F1 does not open with CN7 disconnected, check the following: Turn the printer power off and disconnect all the cables connected to the engine board and remove the controller board. Reconnect each cable and the controller board one at a time until the FRU causing F1 to open is found. Replace the failing FRU. 2-24

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4026-0XX
2-24
Fuse F1 continues to open after being replaced
FRU
Action
1
Fuse F1
If fuse F1 continues to open after being
replaced, disconnect CN7 from the engine
board and turn the printer power on. If F1 opens,
replace the LVPS.
If F1 does not open with CN7 disconnected,
check the following:
Turn the printer power off and disconnect all the
cables connected to the engine board and
remove the controller board. Reconnect each
cable and the controller board one at a time until
the FRU causing F1 to open is found. Replace
the failing FRU.