Lexmark E330 Service Manual - Page 88
Service Manual, Operator panel service check continued
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4505 Operator panel service check (continued) FRU Operator panel Controller card Warning: Do not replace the operator panel and controller card at the same time. Each card contains the printer settings. When either of these cards is new, it obtains the settings from the other card. Settings are lost when both are new and replaced at the same time. Action Lights If none of the lights come on, make sure the cable is properly connected to the controller card and the controller card has input voltage to it. Verify +24 V dc on cable pin 8 at J7. • Check for +5 V dc at J16, pin 5 See "Controller card service check" on page 2-49 or page 5-3 for more information. • If these voltages are not correct, replace the controller card. • If these voltages are correct, replace the operator panel. If more than one light does not turn on or an individual light stays on solid during POST, replace the operator panel. If all lights are dim and operate erratically during POST or all lights come on and stay on solid during POST, replace the FRUs in the following order one at a time: • Controller card • Operator panel 2-60 Service Manual