Lexmark C510 Service Manual page 108

5021-0XX
Step Questions / actions
5 If waste toner bottle is
removed, reinsert it.
Ensure rear cover
assembly cover is shut.
Override top and front
cover interlock switches.
For location, see
"Interlock switch
locations" on page
Reconnect operator panel.
Turn printer on. Does 901
error reappear?
6 Turn printer off and remove
engine controller board
shield. See
controller board removal"
on page 4-55
remove shield. Check cable
that connects I2CN on
engine controller board to
DCN3 on I/O board for
proper connection,
damage, pin shorting and
continuity. Is cable okay?
2-30
Service Manual
5-8.
"Engine
for steps to
Yes
Go to step 6.
Replace engine
controller board.
See "Engine
controller
board removal"
on page 4-55.
No
Problem solved.
Replace cable.