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4077-001
Parallel Port Service Check
FRU
1
Parallel Port
2
Communications
Jumper
Power Service Check
FRU
1
Power Supply
3
Printhead Cable
Parallel Cable
Encoder Card
4
System Board
Action
Run a test page to be sure the printer can print.
"Parallel Port Test" on page 20
Run the
test fails, replace the system board.
If the parallel cable has been replaced and there is
still a communications problem, move the
communications jumper to pins 2 and 3.
Action
Disconnect J11 from the system board and check
the following voltages on the power supply cable:
• J11-1 to GND = +5 V dc
• J11-3 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 parallel cable and the encoder card.
If the symptom has not changed, replace the
system board.
Diagnostic Information
. If the
14
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