Diagnostic information 2-31
7100-XXX
Toner low/empty service check
Waste toner bottle 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.
2 Reconnect operator panel. Turn printer on.
Touch negative lead of voltmeter to metal
frame to obtain ground. Touch positive lead
to MCN8 pin 2, 4, 6, or 8 for specific color as
dictated by list below:
MCN8
pin2—black(K)
pin4—yellow(Y)
pin6—magenta(M)
pin8—cyan(C)
Slightly remove toner cartridge in question.
Voltmeter should read approximately 4.8
VDC. Continue to slowly slide toner
cartridge out of printer while noting
voltmeter reading. Voltage should slowly
decrease until it reads approximately 0
VDC. Is toner sensor system working
properly?
Replace engine controller
board. See “Engine
controller board removal”
on page 4-34.
Check cable for continuity
between engine controller
board connector MCN8 and
toner sensor system (both
sender and receiver). Also
check for shorted pins. See
“Toner sensor (sender)
removal” on page 4-24
and “Toner sensor
(receiver) removal” on
page 4-42 for steps to
expose cable. If cable is
okay, replace toner sensor
system.
Step Questions / actions Yes No
1 Remove waste toner bottle from printer.
inside waste toner bottle holder, check
sensor flag. Does flag work properly, and is
it not damaged?
Go to step 2. Replace waste toner bottle
holder. See “Waste toner
bottle holder removal” on
page 4-22.
2 Reinstall waste toner bottle. Does error
clear?
Problem solved. Go to step 3.
3 Replace waste toner bottle holder. See
“Waste toner bottle holder removal” on
page 4-22. Does error clear?
Problem solved. Replace engine controller
board. See “Engine
controller board removal”
on page 4-34.
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