Lexmark T430 Service Manual - Page 72

4048-1xx Controller card service check Warning: Never replace both the operator panel and controller card at the same time. Otherwise, some critical settings will be permanently lost. FRU Controller card assembly Action Check for +5 V dc and +24 V dc from the LVPS card to the controller card assembly. 1. Turn the printer off. 2. Disconnect the LVPS cable from the controller card at J17. 3. Turn the printer on. 4. Verify +24 V dc from the cable, connector sockets #1 and #2 and +5 V dc at socket #5. If voltages are not present or incorrect, see "Low voltage power supply (LVPS) service check" on page 2-39. Note: With all cables connected, the printer should complete POST within approximately 12-15 seconds in the following sequence: a. The operator panel light comes on. b. Diamonds display from left to right. c. Dots display left to right. d. The memory size and processing speed temporarily display. e. The operator panel displays Performing Self Test. f. Ready displays. If immediately following power-on, the operator panel lights are on, but the printer does not go through steps a and b above, replace the controller card assembly. Note: Always check printhead alignment after replacing the controller card assembly. See "Printhead assembly adjustment" on page 4-2 for hardware alignment of the printhead. Note: U.S. versus non-U.S. and the printer configuration ID can be reset. This affects default measurements and paper size. This can be changed. See "Defaults" on page 3-15 in the Diagnostics Mode. See "Diagnostics Mode" on page 3-2 for more information. 2-38 Service Manual