Lexmark T620 Service Manual - Page 125

4069-5XX/7XX Problems with excessive static electricity buildup. FRU 1 Front Cover Assembly Action Check the front cover assembly to make sure the ESD brush ground lead is firmly attached to the high capacity option. Also check to make sure the ESD brush is not loose or damaged. The printer does not recognize one or more output options as installed. Service Tip: If more than a single output option is installed, check each one to see if the printer recognizes any single option as installed. If the printer recognizes any of the output options, the base printer autoconnect system is operating correctly. The problem is in the unrecognized option. Continue with this service check or go to the service check for the failing output option. FRU Action 1 High Capacity Stacker Option Check the autoconnects, cables and connectors of the option for any signs of loose or damaged parts. 2 High-Capacity Output Remove the left and right side covers Stacker/Mechanical Linkage and check all four autoconnects for Assembly damage, especially the connector pins. Remove the output option and check the voltages on the standard output bin autoconnect located on the top left rear of the printer. Go to "Autoconnect - Top" on page 5-11. If the voltages are correct, reinstall the output option and note the positions of the toroids on the autoconnect cables on the upper and lower assemblies, and check the voltages on the autoconnects. If all voltages are correct and the lower assembly is failing, replace the lower control board. If the upper assembly is failing, replace the upper control board. If the voltages are incorrect, replace the upper or lower failing mechanical linkage assembly. Diagnostic Information 2-97