Question about Philips HTS3500S System
I've got a Philips HTS3500s cinema system and it keeps turning itself on! I'll come in from work and it'll be on when I am 100% sure it was off before I left.
It's hooked up to a Philips plasma TV via a fairly good Scart lead and occasionally turns on whilst flicking channels.
Also while I'm at it, does anyone know how to adjust the volume on this from my TV remote? I press the 'select' button on the TV remote and DVD lights up (and is still on) it allows me to do every function EXCEPT adjust the cinema systems volume!
It's just magically switched on??? Do you have kids? ;-)
Posted on Sep 07, 2008
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It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be with your output drivers. Please check for short on the outputs fitted for both the channels. Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise which can be a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board. Maybe the protect circuit by itself is shutting off due to a faulty bias or there is a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the amplifier comes out of the protect mode then check for short on the speakers.
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