Lexmark C510 Service Manual - Page 141
-Duplex connection error 1 service check, Disconnect cable
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5021-0XX 985-Duplex connection error 1 service check Step Questions / actions Yes 1 Check duplex unit cable. is Replace duplex cable properly connected? unit. See "Duplex unit assembly removal" on page 4-13. If problem persists, go to step 2. 2 Check cable connection to Go to step 3. connector ACN4 located on low voltage power supply. See "Engine controller board removal" on page 4-55 for steps required to remove engine controller board cover. This will allow access to ACN4. Is cable properly connected? 3 Disconnect cable from Replace low ANC4 and check for voltage power continuity between ACN4 supply. See connector and duplex "Low voltage connector located on back power supply of printer. Is there (LVPS) with continuity? cage removal" on page 4-60. No Properly connect cable. If problem persists, go to step 2. Properly connect cable. If problem persists, go to step 3. Replace faulty cable. Diagnostic information 2-63