Lexmark T430 Service Manual - Page 73

4048-1xx Dead machine service check Note: Check the AC line voltage. The voltage should be within the following limits: • 90 V ac-120 V ac for nominal-100 V model printer • 100 V ac-127 V ac for the nominal-110 V model printer • 200 V ac-240 V ac for the nominal-220 V model printer Low voltage power supply (LVPS) service check FRU Low voltage power supply (LVPS) (100 V, 110 V, or 220 V) Action Unplug the power cord and verify that the cable is correct and functioning. Replace if necessary. With the power cord unplugged, remove the HVPS fan and disconnect the 8-pin (CN2) connector from the LVPS. Pin 8 is the topmost pin of the connector. • Verify pins #2, #5, and #6 are ground. Replug the power cord and turn the printer on. CAUTION: Be careful to not ground pins to cage while testing. • Verify pin #4 is +5 V dc. • Verify pins #7 and #8 are +24 V dc. If any one of these is incorrect, replace the LVPS. If these are correct, check the controller card, operator panel, and wiring. Note: A "dead machine" implies no power beyond the LVPS. If the printer behaves "dead" but has correct power from the LVPS, unplug all connectors from the controller card except J18 (power from LVPS). Turn the printer on. If the printer does not beep 5 times, replace the controller card. If it does beep, turn the power off and plug in other devices such as sensors and operator panel one at a time. Turn the printer back on and observe any beeps and/or operator panel messages. This technique may be repeated to help isolate a faulty component or short. Diagnostic information 2-39