Lexmark 4076 Execjet II Service Manual - Page 25

Operator Panel Service Check, Diagnostic Information, FRU OR PROCEDURE, ACTION

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4076-0XX Operator Panel Service Check FRU OR PROCEDURE 1 Power Supply 2 System Board 3 Operator Panel Cover 4 Operator Panel Card Operator Panel Cable ACTION Disconnect J11 from the system board and check the following voltages on the power supply cable: J11-1 to GND = +5V dc J11-3 to GND = +24V 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 the printer on. Check for +5 V dc at test point CE/TP near the operator panel connector on the system board The operator panel cover actuates the operator panel sensor on the operator panel. Check the cover for any broken parts. Check the operator panel sensor for dirt. Check the operator panel cable for continuity. If the cable is good, replace the operator panel. If the symptom remains, replace the system board. Diagnostic Information 13

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4076-0XX
Diagnostic Information
13
Operator Panel Service Check
FRU OR PROCEDURE
ACTION
1
Power Supply
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 = +24V 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.
2
System Board
Turn the printer on. Check for +5 V dc
at test point CE/TP near the operator
panel connector on the system board
3
Operator Panel Cover
The operator panel cover actuates
the operator panel sensor on the
operator panel. Check the cover for
any broken parts. Check the operator
panel sensor for dirt.
4
Operator Panel Card
Operator Panel Cable
Check the operator panel cable for
continuity. If the cable is good,
replace the operator panel. If the
symptom remains, replace the sys-
tem board.