Lexmark C750 Service Manual - Page 139

5060-00x Step 10 Symptoms 990 Service Error Yes Go to "990 Service error" on page 2-101 No Call your next level support The printer does not recognize one or more output options as installed. Note: If more than a single output option is installed, check each one to see if the printer recognizes any single option as being installed. If the printer recognizes any of the output options then the base printer autoconnect system is operating correctly and the problem is in the unrecognized option. Continue with this service check or go to service check of the failing output option. Step 1 Action and questions Options-make sure that the output expander option is the only output option that is not recognized by the base printer. Is this the only output option not recognized by the base printer? 2 Mechanical linkage (tables)-check the 5-bin mailbox autoconnect cable and connector for any signs of damage, especially the connector pins. Is there any signs of damage to the cable, connector, or connector pins? 3 Mechanical linkage (electrical)-make sure the autoconnect cables are connected correctly to the control board. Are the cables attached securely and correctly? 4 Voltage check, base printer autoconnect connector- turn the power off and remove the 5-bin mailbox option from the printer. Check the voltages on the base printer top autoconnect connector. Go to autoconnect - top. Are the voltages correct? 5 Voltage check, 5-bin mailbox system board-reinstall the 5-bin mailbox option and check the voltages at J1A and J1B on the connector. Are the voltages correct? Replace the output expander option system board Replace the output expander option mechanical linkage assembly Go to step 5 Check the autoconnects in the printer Go to step 4 Reseat the cables Replace the Autoconnect cable Yes Go to step 2 No Check the autoconnect system in base printer Go to step 3 Diagnostic information 2-105