Lexmark 4227 Service Manual - Page 44
Operator panel service check, Start/Stop, Load/Unload, FormFeed., Operator Panel Disabled, Micro
UPC - 734646117104
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4227-300 Operator panel service check Note: Press any button except Start/Stop, Load/Unload, or FormFeed. If Operator Panel Disabled is displayed, unlock the operator panel by powering up with the Micro↑ and Micro↓keys pressed. Use the same procedure to re-lock the panel after service is complete. FRU Action 1 Operator Panel If there is a 631 Display RAM Error, replace the operator panel. If there is a 63B Key Scan Error, one or more buttons are being detected as pressed during power-up. 2 Printer Cable Operator Panel Replace the operator panel. During power-up, all LEDs and all LCD pels should turn on briefly. Enter the Service Menu and perform the Button Test. If there are missing or extra pels displayed, or if any of these tests fail, check the condition and continuity of the operator panel cable. 3 Cover Switch Replace the cable or the operator panel. If Cover Open is displayed, check the cover switch. Jumper the cover switch connector on the operator panel. If Cover Open is displayed, check the condition and continuity of the operator panel cable. Replace the cable or the operator panel. 4 Main Logic Board If the symptom has not changed, replace the main logic board. 2-20 Service Manual