Question about Amplifiers & Preamps
My sony S master digital amp is about 2 years old.I am on digital cable ..and my sound runs through the amp ..and the four speakers.The problem is that the sound works fine ..then for some reason ..will just cut out and not work anymore...then if I am lucky the sound will mysteriously come back on again.I would appreciate anyones help ..please advise me if you need more clarification.Annalisa
SOURCE: sony amplifier power
Hi uscsae, This is usually caused by a blown fuse or a blown capacitor. The fuse would be cheap and easy to fix, the capacitor would be expensive and replacement would be my choice. If you are pretty handy with electronics, unplug it, take the cover off the unit, and look near the capacitor for the fuse. Check the fuse for a break in the wire inside it. You can get these fuses at Radio Shack. Hopefully this is what it is, and will be a cheap and easy fix for you. Let me know how it goes. Best regards, nightdiver
Posted on May 27, 2006
The protection circuit is self resetting, it operates only when there is a fault condition in the amp. there is most probably a failure in the output stages of the amp causing a dc offset condition in the speaker output. The protection cct operates to prevent damage to your speakers. It may be difficult to offer a solution to you for this, it gets a bit complex to fix from here...you may have dry solder joint problems in the output stages, or more likely, failed output components. if you have a transistor checker(ohms meter), then you may be able to determine if any output transistors have failed, I recommend taking the amp to a good HiFi guy for repair. Many (including myself) often replace the all transistors to the last 2 stages when outputs fail. assures reliability in the future to repair this way, but the cost goes up a bit also. expect at least $120 to repair is it is a failed output stage.
Posted on Jan 11, 2008
SOURCE: Technics SU-V2 keeps cutting out
An amp will cut out if the output protection circuit kicks in. This circuit compares output power against the preset level. Each channel has it's own, independent protector. There are calculations that can be done, but for a novice the rule of thumb is to "never use a speaker with a power rating less than the amp AND a lower impedance than stated". Typically using a 4 ohm load on a 8 ohm system is inviting disaster. Even if the system does not become a smoke generator, you might notice that though "louder", the sound quality is deteriorated. Many "audiophiles" often hook up some combinations of speakers to have "surround" without really understanding that the collective impedance actually changes (generally lowers).
Posted on Jan 21, 2008
SOURCE: p-301 onkyo pre-amp
Hi juicer, If you use the switched outlet, then everything will be turned on/off when you operate the preamp power switch. Use the unswitched, then you have to turn off each unit separately. You choose which one you want. It wont matter.
What connection do you intend to use to connect the LBT zx6 to the Onkyo preamp??
Posted on Mar 22, 2008
I have a sony S-master 5.1ich full digital amplifier sound system that has a 5 disc cd changer in it along with radio and other functions. when i plug it in now the power light goes on but it will not actually come on and work. Just the red power light is on. I have tried everything from the remote to click on the power, to trying to open the dvd player which usually worked in the past then I would just switch over the function and last but not least I just tried to plug and unplug it waiting abou 5-10mins inbetween and that didn't work. I think it is something maybe internal and if it is I was wondering if you could tell me where to look to maybe pin point the problem so I can fix it without taking it in somewhere. Thanks. (sorry for the novel i just wrote,lol).
Posted on Jun 03, 2011
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