Question about Akai LCT2662 Television
Hello. I was just wondering if you have came across any of this units that have no power as a result of short on the A/D Board? I have had two of these units now. I sucessfully rebuild the power supplies only to run in to the short on the 5VDC standby. With the power supply switch on, it will only read 1.8 to 2VDC. If I unplug the connector to the main board, it will give the expected 5VDC. I have tried to trace the short down with no luck. Any help would be greatly appreciated. Thanks in advance.
If it is a "low ohm" VCC to GND short. Measure caps looking for the lowest reading...may be just a little difference, but the closer you are to the short the lower the reading will be. You can also try hooking up your meter, one with 5 digit readout works best, to VCC and GND. Try to do it somewhere away from your lowest reading, and use a can of freeze spray to spray individual components. If you "hit" the shorted part the reading will fluctuate. You can test this by spraying the leads. Then you can also try the same set-up with hot air.
Posted on Apr 04, 2008
I have not seen a supply problem that after replacing the caps found something loading down the 5v line. Guess it's time to get out the scope and trace. :)
Posted on Apr 03, 2008
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