Lexmark C912 Service Manual - Page 148

5055-xxx Options service check Service Tip: When you have a problem with any of the options installed in the options slots on the interconnect board, switch the non operating option to one of the other option slots to isolate the failure. Serial port Run the "Serial Wrap Tests" on page 3-16. Note: The Serial Wrap Test is designed to check the serial port hardware by using a wrap plug, P/N 1329048, and invoking the Serial Post Diagnostic Test. The test helps isolate the printer from the serial cable and host computer. The test provides failure information on the display for approximately three seconds. If the test indicates a problem, replace the RIP board. Flash Memory Option(s) Run a copy of the test page and check to see if the option you are checking is listed. The printer does not recognize the option being installed if the option is not listed. Be sure the memory card assembly is installed correctly and is not broken or damaged. If the Memory card assembly is correctly installed, not broken or damaged, then run the "Flash Test" on page 3-25. If the test fails, replace the Flash card assembly. If the problem continues, replace the RIP board. DRAM Memory Option(s) This service check is the same as the flash memory option service check with the following exception: Run the "DRAM Memory Test" on page 3-12 from the menu if the DRAM Memory card assembly is correctly installed and not broken or damaged. If the test fails, replace the DRAM card assembly. If the problem continues, replace the RIP board. 2-98 Service Manual