Pioneer VSX-D710S help

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Mike Paull Contact options for registered users 's Avatar (by Gravatar) posted on
July 28, 2007, 5:44 am
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Hi Everyone,

After many years of fantastic service the ol girl has finally started
playing up. After being on for 15-30 mins the digital display will show
"power off" and then the amp will switch off and back on again. Once it is
back on it usually will show the same message and go through the same cycle
again after a couple of seconds and would continue to do so unless switched
off.

I have googled but found little helpful info about the subject and a call
to Pioneer yielded a "take it to one of our authorised service centres".

Before I do so, has anyone here serviced this model before or have any
clues on what might be causing the problem?

Thanks for any help offered.

Mike

ps. if anyone has a pdf of a service manual or schematic could I please
have a copy?

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Trevor Wilson Contact options for registered users 's Avatar (by Gravatar) posted on
July 29, 2007, 9:58 pm
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Re: Pioneer VSX-D710S help



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**Dry solder joints, electrolytic caps, or a dodgy transistor in one of the
output stages. Somewhere.

--
Trevor Wilson
www.rageaudio.com.au



--

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Mike Paull Contact options for registered users 's Avatar (by Gravatar) posted on
August 3, 2007, 11:04 am
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Re: Pioneer VSX-D710S help


On Mon, 30 Jul 2007 07:58:28 +1000, "Trevor Wilson"

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Hi Trevor,

Thanks for the tips. I've had a good look at the caps and visually there is
nothing to indicate a problem although obviously I realise that does not
mean they are ok. Now I have taken the cover off I noticed a fan that blows
air onto a rather large heatsink which has two very large ic's attatched to
it, this fan isn't switching on at all, so i'm going to grab my dmm and see
if there  is voltage on the supply pins. Also going to grab a can of freeze
spray and see what effect that has.

Mike


Rudolf Contact options for registered users 's Avatar (by Gravatar) posted on
August 6, 2007, 12:05 am
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Re: Pioneer VSX-D710S help


Usually, fan is controlled by the signal level or temperature of the
heatsink, so it mau not come on at the start.

Rudolf


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Mike Paull Contact options for registered users 's Avatar (by Gravatar) posted on
August 6, 2007, 11:39 am
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Hi Rudolf,

I took some measurements tonight and found that the fan only switches on
when the volume is wound up to a specific point. The works perfectly.

Next I sprayed freeze spray on transistors and semi's on the various pcb's
that make up this amp and this had no effect what so ever. It still
displays "POWEROFF" and goes through a power cycle.

I guess next i'll start checking the pcb's for poor soldering joints, and
i'll start with the power supply pcb.

mike
 

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Rudolf Contact options for registered users 's Avatar (by Gravatar) posted on
July 30, 2007, 2:19 am
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Re: Pioneer VSX-D710S help


Take it to a technician.  Does not have to be a Pioneer service center.


Rudolf

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