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My amplifier is konzert 502a no sound of speaker a and b but sorround is sound it is capasitor

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It is most likely NOT a capacitor. Not all problems are from bad capacitors. You may have DC Offset(a damaged amplifier). (It's hard fro me to understand your English). If you need more assistance, or would like to inquire about repairing your unit, please visit my website at audioserviceclinic.com. You may contact me there. Thank you.

Posted on Dec 06, 2014

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Posted on Jan 02, 2017

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Why av-502a karaoke amplifier no sound on main speakers but sorround and center have sound pls.help?


Check the main speakers. If found OK, check and replace damaged components at the main power amplifier circuit. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box and press "Enter".
http://electronicshelponline.blogspot.com/

Jul 13, 2014 | Audio Players & Recorders

1 Answer

Konzert model AV 502A


Disconnect the speakers, all of them. If the fuse continues blowing off, you have a short circuit in the final stage of the device, called the amplification circuit. If the does not blow , then the short circuit in is one or more speakers.

Jan 18, 2014 | Audio Players & Recorders

1 Answer

Black diagram of av-502a


front: 500 watts/channel
surround: 30 watts/channel
center: 30 watts

Jun 22, 2013 | Audio Players & Recorders

1 Answer

KONZERT AV-502A KARAOKE AMPLIFIER,POOR AUDIO,2-RESISTOR WORN OUT PLS. HELP ME


pls check burnt resistors, if ceramic it's value is .25 0hms 5 watts, if big carbon film resistor it's value is 10 ohms 3 watts. check also power transistors A1941 & C5198. also check driver transistor A940 & C2073

Jan 06, 2013 | Car Audio & Video

1 Answer

Just asking for a right speakers for konzert 502a


What actually is Right is for you to decide:

These will be dependent to what you intend to use.

If these unit will be used for Karaoke , suggestion could be

using Single 15" Konzert Speakers for each channel or

Dual 12" Konzert Speakers for each channel.


But if you intend to use it in a small room , you can visit the

showroom in which speakers are connected to it, to have your

final decision.What may be best for others may not be the one

you choose.Listen and feel what you like .


Have a nice day!

Nov 03, 2012 | Audio Players & Recorders

1 Answer

I have a konzert 302, just the other day I was wondering why the left speaker sound is disorted and very scratchy. I Thought it was only my speakers but I check and found out it was from the left chan


If you intend to DIY , check for possible cold solder joints,

leaky transistors , changed-value resistor.


Upgrade to 502 it is better than the one you have.

Aug 02, 2012 | Audio Players & Recorders

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