Operator Panel Service Check - Lexmark 2390 003 - B/W Dot-matrix Printer Service Manual

Operator Panel Service Check

Note: If the Op-Panel Asm is locked, only the Start/Stop, Form
Feed, Alt + Tear Off and Alt + Park/Load buttons are active. Model
2 and 3 printers have a "Lock" LED to indicate that the operator
panel is locked. To unlock the operator panel, turn the printer off and
then on while pressing Micro
FRU
1 Op-Panel Cable
Sub Logic Board
2-24
and Micro .
Action
Check the connections from the operator panel
to the sub logic board and from the sub logic
board to the main logic board.
Disconnect the operator panel from its cable
and make sure +5 V dc is present on the
following pins on the cable:
23XX-001
CP1-1
CP1-7
If there is a voltage problem make sure the sub
logic board is receiving +5 V dc on CN1-3.
Replace the operator panel cable, the sub logic
board, or the power cable as necessary.
23XX-002,003
CP1-2
CP1-8