Lexmark E220 Service Manual - Page 97

4500 Controller card service check (E220/E321/E323) FRU Controller card assembly Action Verify +5 V dc and +24 V dc inputs from the LVPS. • Turn the printer off. • Disconnect the LVPS cable from the controller card at J1. See "Controller (E220/E321/E323 only) " on page 5-7 for more information. • Turn the printer on. Verify +24 V dc from the cable, pins 3 and 4. Verify +5 V dc on cable pin 1. Verify that pins 2, 5 and 6 on both the cable and the card connectors are grounded. • If voltages are correct, check the continuity in the cable. If the cable is good, see the "Low voltage power supply (LVPS) service check " on page 2-76 for more information. • If grounds are not correct on the cable, first check it for continuity and then the LVPS. • If the grounds are not correct on the controller card, replace the controller card. (Check with one probe on the connector pin and the other on the cards ground plane found at each screw head.) Diagnostic information 2-67