Operator Panel Service Check - Lexmark Medley 4012-009 Service Manual

4012-0XX

Operator Panel Service Check

FRU
1 Power Supply
2 Operator Panel Board
Operator Panel Cable
3 Fax Board
Action
Disconnect J2 from the fax board and
check the following voltages on the power
supply cable:
J2-1 to GND = +5 V dc
J2-3 to GND = +34 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 fax board.
Perform the Operator Panel Test; see
"Operator Panel Test" on page
If some of the buttons do not work, check
the contacts on the back of the keypads
and the surface of the lands on the opera-
tor panel board. Replace the keypads as
necessary. Check the continuity of the
operator panel cable before replacing the
operator panel board.
Turn the printer on. Check for +5 V dc at
J4-3 on the fax board.
Diagnostic Information
24.
10