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Old 22nd May 2006, 11:46 AM   #1
Solve is offline Solve  Sweden
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Default 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.

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Old 22nd May 2006, 11:54 AM   #2
GJF is offline GJF  United Kingdom
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Are you sure that when moving you haven't crossed over speaker wires?
Sounds as if the protection circuits are clicking on and off.
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Old 22nd May 2006, 12:09 PM   #3
Solve is offline Solve  Sweden
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I checked everything i could.
I tested everything in my Marantz and there its ok just sound very
boring in compare...
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Old 22nd May 2006, 05:21 PM   #4
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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?
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Old 22nd May 2006, 08:11 PM   #5
Pano is offline Pano  United States
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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.
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Old 22nd May 2006, 11:48 PM   #6
john65b is offline john65b  United States
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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...
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Old 23rd May 2006, 06:33 AM   #7
Solve is offline Solve  Sweden
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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?
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Old 23rd May 2006, 03:32 PM   #8
john65b is offline john65b  United States
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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.
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Old 23rd May 2006, 05:01 PM   #9
GJF is offline GJF  United Kingdom
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It is possible that when the diodes across the outputs fail that they can be a short circuit.

This will activate the protection circuits.
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Old 23rd May 2006, 06:40 PM   #10
john65b is offline john65b  United States
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But it was ticking/failing before he shorted the diodes...may have two problems now...

Try solving one at a time....
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