Lexmark Optra E Service Manual - Page 49
Operator Panel Service Check, Diagnostic Information 2-27
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4026-0XX Operator Panel Service Check FRU Action 1 Operator LEDs Panel Assem- Be sure the operator panel cable is properly bly seated in J5 on the controller board. Run POST and check each LED for proper operation. If more than one LED does not light or an individual LED stays on solid during POST, replace the following FRUs one at a time in the order shown: Controller board Operator panel If all LEDs are very dim and operate erratically during POST or all LEDs come on and stay on solid during POST replace the following FRUs one at a time in the order shown: Operator panel assembly Controller board If none of the LEDs are on, be sure +5 V dc is present at J1-2 on the controller board. If correct, replace the operator panel assembly. If incorrect, replace the controller board. If all the LEDs come on and remain on, replace the following FRUs one at a time in the order shown: Operator Panel Assembly Controller Board Button Inoperative Disconnect the operator panel cable at J5 on the controller board. Check the continuity between J5-5 and J5-6 on the cable as you press the button. The meter should read from approximately 10K ohms to approximately zero ohms when the button is pressed. If the continuity is incorrect, replace the operator panel assembly. If correct, replace the following FRUs one at a time in the order shown: Operator Panel Assembly Controller Board Diagnostic Information 2-27