diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Class D (http://www.diyaudio.com/forums/class-d/)
-   -   Ticking T-Amp (http://www.diyaudio.com/forums/class-d/80021-ticking-t-amp.html)

Solve 22nd May 2006 11:46 AM

Ticking T-Amp
 
I pulled of the power to the t-amp to move it and when i powered it up again i just get an ticking sound from the speaker.
Is it blown?
I lights up and i tried to measure the volts and everythings looks fine.

Solve

GJF 22nd May 2006 11:54 AM

Are you sure that when moving you haven't crossed over speaker wires?
Sounds as if the protection circuits are clicking on and off.

Solve 22nd May 2006 12:09 PM

I checked everything i could.
I tested everything in my Marantz and there its ok just sound very
boring in compare...

DocLorren 22nd May 2006 05:21 PM

I experienced the same thing; a faint clicking a little faster than 1 Hz on both channels and often changing a little in amplitude. Sometimes its barely audible, sometimes its plain irritating. I use a wallwart 12V 2A SMPS supply. Changing to a GC solved the ticking so it must be T-amp intrinsic. What could it be?

Pano 22nd May 2006 08:11 PM

Clicking is the protection circuit. You must have an over current or over temperature problem, or both.

I haven't heard the ticking except in those situations.

john65b 22nd May 2006 11:48 PM

I have heard ticking and all sorts of goofy stuff after inadvertently grounding the - speaker outs on Tripath amps...all speaker outs NEED TO FLOAT...not be grounded...

Check for continuity from ground to neg (black) speaker out...or any of teh speaker outs for that matter...

Solve 23rd May 2006 06:33 AM

Well...now i have two problems.
When testing around with the multimeter i shorten two of the diods,D1 and D3.One accident alwayes seems to follow by another one.Now i have to found an replacement for this http://www.alldatasheet.com/datashee...MBRS130T3.html

Floating ground?When i measure from speaker black to the "big" ground on the bord its contact?

john65b 23rd May 2006 03:32 PM

There should not be contact between the speaker outs and the chassis ground. All speaker outs should be floating - not connected to ground or each other. Independent connections.

Panomaniac --> can you confirm this - you are the subject matter expert...

You can disconnect the speaker outs from the case and see if it works...don't know about your diode issue.

GJF 23rd May 2006 05:01 PM

It is possible that when the diodes across the outputs fail that they can be a short circuit.

This will activate the protection circuits.

john65b 23rd May 2006 06:40 PM

But it was ticking/failing before he shorted the diodes...may have two problems now...

Try solving one at a time....


All times are GMT. The time now is 12:03 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2