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HI, I have a sony BRAVIA TV model KDL-40S2530 never connect on any antenna (so no update possible). The power PCB is G2A ... and after 1/2 H, the tv power off - on - off -on like a metronome. After downloding the schematic, I have done some test and it's the 18 V than, after 1/2 H go down to 12V ... so the relay switch off, and on ... and the 18 V go up .... and down ... etc ... I suspect IC6100 .... Thanks for answer Best Regards CM

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Check the (1-873-818-12) DF4 board part IC6704 see if pins 1 and 3 are dead short ...ps i would like to know ware you got the schematic as i would like to have a copy as well carl69jr@hotmail.com

Posted on Sep 15, 2011

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I sounds like heat might be a factor.
You can get a can of circuit cooler and spray the ic and see if it works longer.

You can test the IC6100 by looking at the input and output. If the input voltage is in specs and the output falls then IC6100 may be at fault. If you have an oscilloscope with two probes you can see it in real time.

You can get a similar action with bad electrolytic capacitors which will eventually fail. You can replace the electrolytic capacitors with low ESR high temperature one.

Posted on Mar 13, 2011

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