Service manual

H57
3-3
Coretronic Corporation
3-2.2 Power Troubleshooting
A. Is LED Indicator OK?
- Check the power cord and AC power outlet.
- Check if the keypad cable has been broken or not.
- Check if all the wires are connected well inside.
- Check the Ballast.
- Check Main Board.
- Check Keypad Board.
B. Is Fan Working After Press Power/Standby Button?
- Check if the Keypad cable has been broken or not.
- Check if all the wires are connected well inside.
- Check the Thermal board.
- Check Main board.
- Check Fan.
C. Is Lamp Lit?
- Check the Lamp cover assembly OK or not.
- Check if there is the sound of Lamp ignitor output from the unit or not.
- Check the Cable of Interrupt Switch.
- Check the DMD board.
- Check the Lamp module.
- Check the Ballast.