Lexmark 1000 Color Jetprinter Service Manual - Page 23
Power Service Check, Carrier Home
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4096-00X Power Service Check FRU 1 Power Supply 2 Printhead Cable Carrier Home Sensor Parallel Cable 3 System Board Action 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. 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. If the symptom has not changed, replace the system board. Diagnostic Information 2-11
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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.