Xerox C2424 Service Manual - Page 226
Repeat the following procedures to check all circuits connected to the I/O board
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m. Plug in the I/O board connector ('P' / J800) in the electronics module. This step adds the I/O board and control panel to the electronics module. n. Turn on power to the system. o. If the electronics module, I/O board and control panel are working, the error code 34,001.43 should be displayed on the LCD to indicate the printhead is disconnected. p. If the correct error code is not displayed, replace the control panel and I/O board and verify the correct error code appears on the LCD. Retest electronics module, I/O board, control panel combination. q. If the correct error code is displayed, continue with the next steps of the procedure. r. If no error code is displayed, return the original control panel and I/O board to the system, replace the electronics module and then continue with the next steps of the procedure. s. If a different error code is displayed, see the "Fault Code Error Message Troubleshooting" on page 3-8 for a definition of the problem and the procedures needed to solve the problem. 2. Repeat the following procedures to check all circuits connected to the I/O board: a. Turn off system and wait 30 seconds for power supply capacitors to discharge. b. Plug in the following connectors, one at a time, and perform steps C and D for each connector. c. Turn on system and wait for the error code 34,001.43. Check that the three voltage indication LEDs INSIDE the electronics module (visible through the vent holes of the electronics module near the AC power switch) are lit. d. If the proper error code and LED doesn't appear after each I/O connector is reconnected, repair or replace the faulty circuit. e. If the proper code appears, repeat the procedures until all I/O board connectors are plugged back in. f. If repairs are made during this step, plug in all connectors to system and retest. If system is fixed, reattach covers to system and perform a full test. If no defects are found in this step, continue with next step. 3. The proper error code is displayed, repeat the following procedures to check all circuits connected to the electronics module: a. Turn off system and wait 30 seconds for power supply capacitors to discharge. b. Plug in the following connectors, one at a time, and perform steps C and D for each connector. c. Turn on system and wait for the error code 34,001.43. Check that the three voltage indication LEDs INSIDE the electronics module (visible through the vent holes of the electronics module near the AC power switch) are lit. d. If the proper error code and LED doesn't appear after each I/O connector is reconnected, repair or replace the faulty circuit. e. If the proper code appears, repeat the procedures until all I/O board connectors are plugged back in. 4-68 WorkCentre C2424 Service Manual