Diagnostic information 2-27
7100-XXX
Toner empty sensor (receiver-TTR) service check
Step Questions / actions Yes No
1 Turn printer off, and remove engine
controller board shield. See “Engine
controller board removal” on page 4-34
for steps to remove engine controller board
shield. Is cable properly connected to
engine controller board connector MCN8?
Go to step 2. Properly connect cable.
Retest printer. If error
clears, problem solved,
otherwise go to step 2.
2 Check the following for continuity between
engine controller board MCN8 cable and
toner empty sensor (receiver-TTR) cable.
See “Toner sensor (receiver) removal”
on page 4-42 for steps to gain access to
sensor cable.
MCN8
Toner empty sensor sender
pin 2 pin 1
pin 4 pin 2
pin 6 pin 3
pin 8 pin 4
pin 9 pin 5
pin 10 pin 6
Also check for shorted pins. Is cable okay?
Go to step 3. Replace cable. Retest
printer. If error clears,
problem solved, otherwise
go to step 3.
3 Replace toner empty sensor (receiver-TTR).
See “Toner sensor (receiver) removal”
on page 4-42 for steps. Retest printer.
Does error clear?
Problem solved. Go to step 4.
4 Replace engine controller board. See
“Engine controller board removal” on
page 4-34. POR printer. Does error clear?
Problem solved. Contact higher level
support.
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