Lexmark 2380 Service Manual - Page 48
Operator Panel Service Check, Start/Stop, Alt + Tear Off, Alt + Park/Load
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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↑ and Micro↓. FRU 1 Op-Panel Cable Sub Logic Board 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 23XX-002,003 CP1-2 CP1-8 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. 2-24