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.
Set the DMM to resistance and measure across the collector and emitter of each of the power transistors. If it shows an ohm reading then you have a shorted transistor. This is the most likely cause of thermal overload trip. But first disconnect the speaker wires from the amp, turn it on and see if the problem persists (to rule out a short on the load side). |
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 |
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. |
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 |
