Dell W2306C No 5 volt standby dead

[high-tech]

I've got this tv in my shop and it won't power up. Well I checked the connector leading to the logic board to find no 5vs on the orange wire. I downloaded the service manual and gave it a look and I found IC 903 pin 5 no voltage VCC1 is dead and I cant figure out where VCC1 originates. The IC 903 needs I think 12 to 15 volts on pin 5 to start vibrating the 5 volt xformer

[PlainBill]

Re: Dell W2306C No 5 volt standby dead

I've got this tv in my shop and it won't power up. Well I checked the connector leading to the logic board to find no 5vs on the orange wire. I downloaded the service manual and gave it a look and I found IC 903 pin 5 no voltage VCC1 is dead and I cant figure out where VCC1 originates. The IC 903 needs I think 12 to 15 volts on pin 5 to start vibrating the 5 volt xformer

You are making good progress. Usually the voltage comes through a high value resistor or resistors from the rectified mains voltage. I've given up trying to identify possible candidates, the flash glare obscures too much of the board.

PlainBill

[high-tech]

Re: Dell W2306C No 5 volt standby dead

Problem solved, I somehow ended rechecking pin 5 again to find 9volts dc and 21.5 volts ac present and there ain't suppose to be any ac there IU fond a 1n4003 diode in series from pin 5 IC 903 to the xformer leaking. I replaced the diode and the set powered up nicely. A happy ending and no boards to be purchased to fix this tv!