2-56 Service Manual
5021-0XX
916—Toner empty sensor (sender-TPD) service check
Step Questions / actions Yes No
1 Turn printer off and remove
I/O board shield. See “I/O
board removal” on
page 4-70 for steps to
remove I/O board shield. Is
cable properly connected
to I/O board connector
DCN15?
Go to step 2. Properly connect
cable. Retest
printer. If error
clears, problem
solved,
otherwise go to
step 2.
2 Turn printer off and replace
I/O board. See “I/O board
removal” on page 4-70.
Retest printer. Does error
clear?
Problem solved. Go to step 3.
3 Check cable that connects
engine controller board
connector I1CN to I/O
board connector DCN1 for
continuity and pin shorts. Is
cable okay?
Go to step 4. Replace cable.
Retest printer. If
error clears,
problem solved,
otherwise go to
step 4.
4 Turn printer off and replace
engine controller board.
See “Engine controller
board removal” on
page 4-55. Retest printer.
Does error clear?
Problem solved. Go to step 5.
5 Turn printer off and replace
toner empty sensor
(sender-TPD). See “Toner
sensor (sender) removal”
on page 4-35 for steps.
Retest printer. Does error
clear?
Problem solved. Call Lexmark
support.
