Denon POA 6600, 6600a

[cuz]

Hi all, I have been building my home theater system slowly for some years now and I'm almost done. Recently I purchased 4 Denon POA amps, 2 are 6600 and 2 are 6600a. 1 of the 6600a work and the other is in protection mode. The (non A) 6600 both are not working. One is in protection mode and the other powers up normal but no sound comes out. I would like to learn how to properly fix these amps and I understand that this is not an easy task. I am willing to purchase the equipment needed to fully restore these amps. I feel if I took them into a shop I will be over charged along with the amps not being properly/truly restored. I would like to have them run close to new. A friend told me I should start here at AK. I am new to this, but so was every one at one point. I have good soldering skills and have a good sense of electronics. Hoping someone can help with the beginning steps of my journey. Thanks for any help. Hoping to hear what my first step should be?

 

[chupa]

Hello, when I was to repair my sony ta-n80es for couple years ago I was in the same situation as you now and if you are newbe to repair electronics as I was then, then you have some learning to do before you start repairing your Denons.
First off you need some electronic measurement instruments as multimeter, oscilloscope and maybe transistor tester and capacitor tester to ( you can also test capacitors, transistors with multimeter to ).
Here is one cheap tester :
http://www.banggood.com/GM328A-Tran...l-LCRRLCPWMESR-Meter-Inductance-p-997582.html

You should also have Variac ( variable transformer) to gently test your amp and isolation transformer for safety.
You can get away with " light bulb amp tester" ( google it to see what it is ) if you don't have variac.

Secondly, If I was you I would use google and search after your amp model as: " Denon POA 6600 repair" or similar search terms. You should even see other amp model repair sites or documents and other forums.
Ask questions here or other forums but be specific because nobody have patience if you asking " what is that thing with 10000uF" on it"! You must know the grounds of electronics and know the components before you asking for help!

Use Youtube and search after the same terms and even search after generic "amplifier repair" and watch carefully the vids to learn.
By now you should have the schematics for your amps so study them carefully learn the various sections of your amp and learn what those sections do and their week points.
Be prepared to locate reputable electronic webshops where you can then buy replacement components for your amp. Ebay can work but unfortunately many sellers have counterfeit of the original parts so one must be very careful shopping on ebay.

Lastly, take your time with the repair, be careful check things twice if necessary and have patience and be prepared for drawbacks.
Well I hope you going to have luck to repair your Denons because those are fine machines

 

[cuz]

Hello, when I was to repair my sony ta-n80es for couple years ago I was in the same situation as you now and if you are newbe to repair electronics as I was then, then you have some learning to do before you start repairing your Denons.
First off you need some electronic measurement instruments as multimeter, oscilloscope and maybe transistor tester and capacitor tester to ( you can also test capacitors, transistors with multimeter to ).
Here is one cheap tester :
http://www.banggood.com/GM328A-Tran...l-LCRRLCPWMESR-Meter-Inductance-p-997582.html

You should also have Variac ( variable transformer) to gently test your amp and isolation transformer for safety.
You can get away with " light bulb amp tester" ( google it to see what it is ) if you don't have variac.

Secondly, If I was you I would use google and search after your amp model as: " Denon POA 6600 repair" or similar search terms. You should even see other amp model repair sites or documents and other forums.
Ask questions here or other forums but be specific because nobody have patience if you asking " what is that thing with 10000uF" on it"! You must know the grounds of electronics and know the components before you asking for help!

Use Youtube and search after the same terms and even search after generic "amplifier repair" and watch carefully the vids to learn.
By now you should have the schematics for your amps so study them carefully learn the various sections of your amp and learn what those sections do and their week points.
Be prepared to locate reputable electronic webshops where you can then buy replacement components for your amp. Ebay can work but unfortunately many sellers have counterfeit of the original parts so one must be very careful shopping on ebay.

Lastly, take your time with the repair, be careful check things twice if necessary and have patience and be prepared for drawbacks.
Well I hope you going to have luck to repair your Denons because those are fine machines

I will buy what I was informed I should, I just want to make sure I buy the correct equipment, so far this is my understanding of what is needed? Feel free to Correct any mistakes,

(1) auto ranging multimeter true rms
(2) oscilloscope
(3) Variac
(4) transistor/capacitor tester

I see there are so many I need help with which ones are best to purchase in order to repair amps, am not sure which brands etc... any links to some good brands would be very welcomed.

I am also reviewing YouTube videos but many are on guitar amps. I just need pointing in the right direction, I know about the counterfeit almost everything on ebay, I have been looking for reputable parts suppliers, I am looking for great authentic parts to replace old ones otherwise whats the point of all this, thanks for your response/help , chupa you rock!