What makes an Amp go into Standby ?

Find a decent tech to take a look at it. My old Parasound was constantly going into "protect" mode a couple of years ago. There is a twelve volt signal that turned on the relay (not to be confused with a 12v trigger, it didn't have one), there was a bad cap in the twelve volt circuit, causing it to lose power, and open the relay. Total cost of repair? $0.52 in parts.

Opening her up can fix a lot of obvious problems as well as discrete component type problems where you can follow the normal circuit flow....but like in Williams case, A parameter needed to be met ( 12 volts to the relay ) and it wasnt, this is where the schematics for the amp would be needed.

beardog,
Parasound will email the schematic to you. Call them and talk to Tony Pointes. He may also give you some advice on which part of the circuit to focus on. FYI: Parasound doesn't really produce "service manuals", just the schematics. One good think, amps like this are generally are built from of many inexpensive parts (appart from the large caps and transformers). No high dollar digital boards to replace. That's why they are almost always worth fixing.

billbillw wrote: »

beardog,
Parasound will email the schematic to you. Call them and talk to Tony Pointes. He may also give you some advice on which part of the circuit to focus on. FYI: Parasound doesn't really produce "service manuals", just the schematics. One good think, amps like this are generally are built from of many inexpensive parts (appart from the large caps and transformers). No high dollar digital boards to replace. That's why they are almost always worth fixing.

This amp looks extremely simple inside....One big **** toroidal transformer...one control board and 5 redundant single board amplifiers sharing one chassis...see the picture I posted above....as simple as they come for multiple channel amps.

That should be pretty easy to fix. Don't overthink things and believe that everything must be completely rebuilt and upgraded. I would suggest a suitable replacement, perhaps better, capacitor and just fix the problem.

We're talking about the 2205 right?

If they are the same caps on each individual single channel ....it could have been a bad batch of smaller electrolytics...A few years back I had to change out about 30 or so Dell motherboards in the 400SC server systems...bad batches of electrolytic caps . They were cheaply made...couldnt handle the application they SHOULD have been able to according to their rated thermal/electrical markings...and the pressure was building up inside as the electrolyte failed ...some just bulged...some popped their safety vents and leaked ....even the ones that just bulged sometimes internally shorted and failed.

Look at this link http://www.news.com/PCs-plagued-by-bad-capacitors/2100-1041_3-5942647.html?tag=nefd.lede I saved it from a while back...scroll down and click on the picture of the caps that says click to view....see if your caps look the same as you scroll through the pics.

Luckily they are easy to change out......piece of cake...she will live again

Ha...I was typing as you were posting the pics....easy fix....you did stay at a Holiday Inn Express this year right ?

beardog03 wrote: »

yeah, thay are all the same ones on each board

That for sure points to a really bad batch of caps...or Parasound used the wrong cap for the job ( More likely bad batch ) ...either way I would contact them even out of warranty. When its obvious that each board failed in the exact same way....most of the better manufacturers would help you in that situation...point them to this thread as well.

One more thing....I would for sure pop the top of the new amp you are getting to just look for this same issue....it possibly could have been manufactured with the same batch of internal single channel amps.