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Pioneer VSX-5000 Receiver

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7/16/2004 1:56 PM

Pioneer VSX-5000 Receiver

Howdy Folks,

An old and dear friend asked me to attempt to fix his Pioneer VSX-5000 receiver. As best I can tell this all digital switching monster is stuck on monitoring Tape 2 - otherwise I "believe" it's functional. Does anyone here have any experience with these beasts? A service manual would be helpful (will have him order one if necessary) but basically I suspect that it just suffers from a switching malady.

Rob

7/17/2004 12:13 AM

I don't know that model specifically, but a lot of receivers use a big custom IC for the selector duties. Look over near the jack plane and see of a lot of the traces collect to one IC, or maybe two - one per channel. The chip may be available from MCM, otherwise get from the factory parts.

A sure sign of trouble is DC riding on signal tracces and even out to the jacks.

ANd make sure the switch for Tape 2 is not shorted.

7/19/2004 1:57 AM

Hey Doug,

Thanks for the reply. Just by luck I found that some bits of grit were mechanically interfering with the "switch" contact strip - almost microscopic bits of funk but enough to keep the Tape Monitor 2 triggered. Otherwise the unit is working well but the power "switch" sometimes takes several whacks to actuate - wonder if one could take a hypodermic with a fine needle and squirt "anything" in to fix those flimsy contacts.

Rob

10/20/2004 6:55 PM
tonto	I have 2 of these amps .. both have the same problem.. sound output clicks on and off.. intermittant, so it's a pain. I have noticed that I can bend the chassis and the sounds will come back.. any ideas ?? where's the schematic ?? sams ?

10/20/2004 8:02 PM

Hey Rob; If you can find a way to get it in, the absolute best "stuff" to use is made by a company called Caig Labs. (www.caig.com) You want the product called Deoxit Power Booster. (Dumb name - great product.)

Tonto; when you have a problem like that, there's really only one good way to find it. You'll need to take the unit apart at least as far as is necessary to be able to examine the main circuit board closely. With a magnifying glass, look over all the soldereing connections. You'll eventually find one,(or more), that appear to have a small "circle" around the solder pad. Remake those solder connections.

They aren't as hard to spot as it sounds. In fact, if your eyes are younger than mine, you may be able to do it with the naked eye. Just make sure the board is lit well.

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