Hi,
In addition to replacing C2455 47/25, I replaced Q7461 BC337-25, even though it tested good out of circuit. Note: There is a sign on the pcb that it was very hot. Also, I replaced C2405 220/25. Note: The original capacitors were 85 deg. I replaced them with 105 deg versions.
Now the TV stays on and Q7461 barely gets warm.
Brad
Hi,
>
> I have a Magnavox (Philips) TV model 27MS3404/17 ch L01.1U AC-7638
>(mfg 08/04) in my shop. The TV will turn on with picture and sound, but
>anywhere from a few seconds to a couple minutes, the horizontal sweep
>shuts down, which looks like the TV turned off, but the SMPS is running
>"Full" and the TV on light (front panel) is lit. Note: I replaced C2455
>47/25 in the horizontal driver circuit, but that didn't fix this problem.
>
> HV measures 27KV (aok). Note: I "fixed" a problem like this on a
>similar model several months ago by reducing the "Picture" (contrast) and
>Brightness that was set too high, but doing the same on this TV did not
>"fix" the problem.
>
> Did anyone fix a similar model with the same symptom?
>
> Thanks in advance, Brad
>
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