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4076-0WJ
Parallel Port Service Check
FRU OR PROCEDURE
1
Parallel Port
Power Service Check
FRU OR PROCEDURE
1
Power Supply
2
Operator Panel
3
Print Head Cable
Parallel Cable
4
System Board
ACTION
Run a test page to be sure the printer
can print. Run
the"Parallel Port Test"
on page
19. If the test fails, replace
the system board.
ACTION
Disconnect J11 from the system
board and check the following volt-
ages on the power supply cable:
J11-1 to GND = +5V 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 recon-
nect the power supply to the system
board.
With the machine unplugged and the
power button depressed, check for 0
ohms at J10-2 on the front of the
operator panel connector. If the read-
ing is incorrect, check the operator
panel cable for continuity. If the cable
has continuity, replace the operator
panel.
Turn off the printer. Disconnect one of
the listed components 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 remaining listed
parts.
If the symptom has not changed,
replace the system board.
Diagnostic Information
14
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