Xerox C2424 Service Manual - Page 95

Power-Up Error Messages and LED Codes The system has three sets of tests that are run when first powered on: ■ Built-In Self Tests (BIST) ■ Power On Self Tests (POST) ■ Print Engine Self Tests (PEST) Note BIST and POST errors are not stored in the fault history logs. BIST Error Reporting BIST verifies basic electronics module CPU operation and reports failures by utilizing the rear interface panel PS and PE LEDs. These tests occur immediately at power-up, before POST tests are run or the control panel is initialized. The following table defines the blink patterns associated with a failure. BIST Error Reporting Blink Pattern Definition Table PE LED Off or 1 Blink, and then off On Solid (dimly) Off 1 2 PS LED Off or 1 Blink, and then off On Solid (dimly) PS and control panel 1/2 sec. blink Rapid blinking Rapid blinking Description The power supply could not remain regulated when DC power was applied so it was shut down. Follow the troubleshooting procedures for electrical shorts (see "Electrical Troubleshooting" on page 4-58 and check the power supply fuses). Initialization failure. The system is held in reset mode. This can be caused by an electronics module fault or a +3.3 V power supply regulation failure (see "Electrical Troubleshooting" on page 4-58). Also, see "Verifying Power Supply Operation - Print Engine" on page 4-71. Boot loader memory test failure. Ensure the systems RAM chips are properly seated and that the correct RAM type for this system is installed. For specifications on approved RAM types for this system, see "System Specifications" on page 1-12. CPU bridge and/or PCI bus is not communicating. Reboot the printer, if the error still occurs, replace the electronics module. ROM not responding. Reboot the printer, if the error still occurs, replace the electronics module. Error Messages and Codes 3-3