Diagnostic information 2-81
5021-0XX
Missing toner cartridge service check
Step Questions / actions Yes No
1 Remove toner cartridge in
question. Holding toner
cartridge with developer
roller away from you, check
toner present sensor
actuators located on left
rear of toner cartridge. Are
actuators damaged?
Replace toner
cartridge.
Go to step 2.
2 Insert toner cartridge and
ensure toner present
sensor flag moves forward.
Remove toner cartridge.
Toner present sensor flag
should spring forward.
Does toner present sensor
flag operate correctly?
Go to step 3. Replace toner
present sensor.
See “Toner
present sensor
removal” on
page 4-63.
3 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
DCN2?
Go to step 4. Properly connect
cable.
4 Reconnect operator panel.
Turn printer on. Touch
negative lead of voltmeter
to metal bracket that holds
I/O board to obtain ground.
Touch positive lead to
DCN2 pin 2 to ensure 5
VDC is being supplied to
toner present sensor. Is 5
VDC present?
Go to step 5. Go to step 8.
5 Check voltage level on
DCN2 pin 1. Is 5 VDC
present?
Go to step 6. Go to step 7.
