[4]
SIX BLINKS OF STANDBY LED
There are three possibilities for this fault:
- Short audio amplifier outputs.
- Lose of 15V supply line.
- Lose of 9V supply.
The key to determine what to check first is if audio is heard before the TV shut off.
- If audio is heard before shut off, check the 15V power supply at CN7503/pin-1. If this voltage is missing replace the G1/G2 board. If this voltage is present, check fuse PS7001 for a possible easy fix. If the fuse is found OK, replace the 'AU' board.
- If no audio is heard before TV shut off, check for 9V at CN9502/pin-1.
- If the 9V is missing replace BU board. If 9V is present check and confirm that the protection circuit output voltage is making it to the Main Microprocessor IC1001/pin-26. If 2.8V is present here, then the Main Microprocessor is defective. Replace BU board. If voltage at IC1001/pin-26 is (0V) the audio output circuit has actually failed. Replace AU board. a shorted audio output or a DC voltage level measure across the audio output will cause a 6 blinks of LED [protection mode]. In either case the problem will exist in the audio circuitry on the AU board.
Contd;