ADS R1 Receiver Troubles

[nosammai]

Hi Everyone,

I'm a bit of a newb when it comes to audio equipment, but I got an awesome ADS R1 Receiver and a pair of L1290s from my grandfather about a year ago. I was really loving them, but this morning while I was listening to some music through them (at a relatively quiet volume), I heard a click and the music stopped playing.

Now the R1 will turn on, but no sound comes out of the speakers. Usually when I turn it on, sound doesn't come out for about 3 or 4 seconds, then there's an audible click from the receiver and it starts working. Now it will turn on and I can hear the hum of the (power supply?), but there is no click, and thus no sound.

Is this something I can repair myself like a blown fuse, or should I just send it in? Also where would be a good place to send something like this and how much would it cost me?

Thanks,
Mason

 

[ryuuoh]

It sounds like the unit is in protection. Does the unit have adequate ventilation?

 

[swechsler]

Check for something obvious. Are there any loose wire strands that might be causing a short circuit, either at the receiver or speaker binding posts? If that checks out OK, disconnect the speaker wires from the receiver and try turning it on again. If you hear the relay click then you have a problem with your speakers or there's a short somewhere in the wiring. However, it's much more likely that your receiver needs servicing.

 

[nosammai]

It sounds like the unit is in protection. Does the unit have adequate ventilation?

Yes, it's sitting up on a shelf on its own.

Check for something obvious. Are there any loose wire strands that might be causing a short circuit, either at the receiver or speaker binding posts? If that checks out OK, disconnect the speaker wires from the receiver and try turning it on again. If you hear the relay click then you have a problem with your speakers or there's a short somewhere in the wiring. However, it's much more likely that your receiver needs servicing.

I've tried it with all of the speakers disconnected, but it still has the same problem.

 

[swechsler]

There's pics (insides and out) of this receiver on The Vintage Knob under the Braun name. I can see a single fuse visible in the interior shot; from its position, it looks like a power supply fuse (which is unlikely to have caused this problem) but it couldn't hurt to take a look. Be sure to unplug the receiver before removing the cover, and be careful not to touch anything, as there still could be residual charges in the capacitors.

I suspect, however, that you're going to have to have a professional look at it. Here's a thread on Audiogon with a suggestion on getting this equipment repaired.

 

[Binkman]

Power supply needs help. I don't like the 'hum'. Probably main caps and any smaller caps will fix it. Look for bad solder joints, discolored ceramic caps if any, etc.

Service manual in Dutch (I don't speak) but good schematics..

http://www.hifiengine.com/library/braun/r1.shtml

Not a bad amp. probably under rated THD. 1.0% at 30 watts per channel. If the tone control section is easy to get at? I'd replace those caps too. If the amp hasn't been dusted you should do so.