2. amps-preamps
  3. 151576-45461

Classe CA-2100 - LED turn red, Amp shuts down, LEFT side of the Amp is extremely hot!

My Amp, which is a Classe CA-2100, has been acting up. It has a status LED light in front that usually stays Blue, but lately, the left channel LED turns RED and it shuts down. Whenever that happens when I goto the Chassis, the LEFT SIDE is extremely HOT! Like super hot to touch. NOT the right side.

The company is in restructuring so I am trying to see if I could get any support, but being a computer engineer and knowing a few things about electronics, is there a way for me to test and see what component is failing? I have access to multi-meter to do some measurements if necessary.


alexb76
georgehifi's avatar
georgehifi
10,312 posts
 
Me thinks you'll need a service manual

It looks very tight in there to get meter probes on to the emitter resistors which I can't even make out.
 And there look to be blue trimpots all over the place!!, good luck finding the bias one with out the manual.

https://hometheaterhifi.com/volume_12_4/images/classe-cap-2100-integrated-amplifier-inside-chassis-m...

Cheers George 
imhififan's avatar
imhififan
2,204 posts
 
https://elektrotanya.com/PREVIEWS/63463243/service-tips-info/egyeb/classe-audio_ca-2100_2200_3200_51...
Good thing is you still have a working channel for reference.
georgehifi's avatar
georgehifi
10,312 posts
 
He’s going to have to get a probe onto the under side of those emitter resistors, looks real hard, unless the speaker terminal works.
Strongly suggest "insulated mini long hook-on probes", connect first then turn on, and visa versa.
Also imhififan do you have an indication which of the blue muti-turn pots is the bias one for him?

Cheers George
imhififan's avatar
imhififan
2,204 posts
 
George,
If you look closely you can see the trim pot on the edge of each side of the main board close to the back panel.
Those blue trim pots close to each other on a daughter board are protection circuits.
 

georgehifi's avatar
georgehifi
10,312 posts
 
That’s good couldn't see the daughter board in my pic

https://hometheaterhifi.com/volume_12_4/images/classe-cap-2100-integrated-amplifier-inside-chassis-m...
Still going to have to get to the underside of those emitters, if they aren’t +speaker
Cheers George
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