Xerox C2424 Service Manual - Page 220
Exit Module (MEP) is Malfunctioning, System Fails to Power-Up
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UPC - 095205676532
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Exit Module (MEP) is Malfunctioning 1. The exit module elevator does not raise and lower correctly. a. Is there scanner power supply working properly? Lift the document feeder and observe the scanner lamps. If the lamps are on and the scanhead moves, the scanner power supply is supplying +24 volts. b. Check the exit module board LED's, see "Scanner/Exit Module Power Supply and MEP (Exit Module) Board" on page 10-8. Replace the exit module board if the LED's do not light up. c. Lift the control panel and check for proper movement of the exit module elevator. Inspect the exit module for defective components. Replace any defective components or the exit module assembly. System Fails to Power-Up PS, PE, and the 3.3 V indicator LEDs are not illuminated 1. System is not receiving proper AC. Caution Use caution with hazardous voltages when diagnosing AC problems. The 3.3 V LED is located INSIDE the electronics module and must be observed through the vent holes close to the AC power switch, see the illustration on page 4-71. a. Inspect the power cord. b. Verify AC outlet voltage and current capacities are within specifications. c. If necessary, move the system to a different outlet and retest. 2. Disconnect the scanner assembly. 3. Transient on AC line tripped protective circuitry in system power supply. a. Cycle power to system to reset protective circuits in power supply. 4. Short circuit on 3.3 V power supply within the electronics module. ESD damage to the system may occur if static electricity is discharged to system electronics a. With power cord connected, touch the metal electronics module to discharge any static electricity. b. Turn off the system and wait 30 seconds for power supply capacitors to discharge. Damage to circuits within the electronics module may occur if the power supply capacitors are not allowed to fully discharge. c. Unplug power cord and remove system covers, see "Covers" on page 8-8. Caution Use caution around motors, pulleys, and live AC connections when working with the system covers off. Disconnect the scanner cable from the electronics module and power on the system. 4-62 WorkCentre C2424 Service Manual
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