Our Sony STRAV920 cuts out Right channel audio after a few moments of satisfactory performance.

Connect one voice coil to one channel of the amp. Repeat with the other voice coil. Do not bridge the amp as your only choices would be series which would be an 8 ohm final load and cuts the amp power in half or parallel wiring which results in a 2 ohm load and very few Sony amps currently made can handle being bridged to a 2 ohm load.

I have seen the audio relays cut out on these. Try tapping right on them lightly to isolate the problem . Andrews Electronics in santa clara will supply you the parts. Larry's electronics [email protected]

disconnect the speakers and see if amp will stay on. if this the case maybe suspect one of the o/p amps

There are two ways to connect a converter box.

The simplest is to use the RF antenna cable supplied with the converter. Connect it from the box (the round threaded connector) to the TV's antenna/cable input connector and put the TV on channel 3 or 4 (whichever the converter box is set to). If your set has screw terminals for the antenna connection, you'll need an adapter to switch from the round cable connection to the screws. This may also have been supplied, but you'll probably need to pick one up at Radio Shack or another retailer.

The other way, if your TV has the inputs, is to use the audio/video output jacks on the converter. Again, the cable is usually supplied with the box. This direct connection gives better picture and sound quality than the RF method. The jacks are color coded: red and white for the audio right and left channels, yellow for video. Just connect them to the matching jacks on the TV and select the video input to watch the box. (If your TV is mono and has only a single white audio input jack, you'll need a Y-adapter to join the two audio signals from the box into one. This is also available at Radio Shack. If you don't do this, you'll only get one channel of the sound when watching a stereo channel.)

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Try lightly tapping on chassis to see if you can get audio to cut on or off with vibration if you can most likely cause is bad solder connections. This unit is well known for poor solder connections especially around poweramp driver IC's IC701, IC501. Also Electrolytic Capacitors in unit have fluid in them and heat Evaporates the fluid causing them to not operate properly over time . Caps that usually go bad are around parts that run hot like Power amp drivers
Just a couple likely suspects.
Try unplugging overnight to give unit a Good Reset also double check all setup settings.
If you need service manual I may be able to get you one
[email protected]

Stereo Tech: Sounds like you definitly have a broken solder connection on the main PC board. A bad solder connection is tricky to find somtimes if one is not familiar with exactly what it looks like (kinda like mt st helens with a ring around the top) if you attempt this yourself DO NOT MAKE A SOLDER BRIDGE you will open pandoras box. Good luck

Suspect short circuit inside if output performance is below satisfactory level and current drawn is 20% or more than rated.
Shanks1

I had a smilar problem a few years ago where myfront right speaker had a distortion and i gae it to a Sony dealer and they say the IC for that channel went bad. So you could checked

I lean toward an overhating condition since the unit does not go into protection mode right away, and then returns.

My thoughts are as follows...

1) The receiver needs better ventilation

2) The speakers are below the rated minimum nominal impedance, causing the amplifier to strain and overheat

3) There is a problem within the amplifier that is causing this problem - this is not user repairable.

I'd try another pair of speakers which are rated at 8 ohm nominal impedance and give it a trial. At the same time, monitor the heat output from the unit (note that modern amplifier sections do run hot). If the unit runs extremely hot at a low volume and still shuts down on 8 ohm speakers, it's time for service or replacement depending on value.