Lexmark 1000 - Manual (Page 23)

Diagnostic Information 2-11
4096-00X
Power Service Check
FRU Action
1 Power Supply Disconnect N1 from the system board and check
the following voltages on the power supply cable:
• N1-1 to GND = +5 V dc
• N1-3 to GND = +24 V dc
If you do not have correct voltage, replace the
power supply. Be sure to unplug the machine
before you reconnect the power supply to the
system board.
2 Printhead Cable
Carrier Home
Sensor
Parallel Cable Turn off the printer. Disconnect one of the
printhead cables and turn on the printer. Look for a
symptom change. Check the failing part for shorts
and replace as necessary.
Repeat this procedure for the carrier home sensor
and parallel cable.
3 System Board If the symptom has not changed, replace the
system board.