Not working Amplifier, Yamaha A-1 all Black metal.
I'm almost sure it is broken or it has big trouble because the main cable is cut.
I remove dust from jewel...
|Yamaha A-1 inside, without dust!!|
Inside A-1 demonstrate his particular design, Two Power Transformers and two big capacitors.
Power amplifer circuit is splitted on 2 boards+1 an 2 Big Heat Sinks.
The input and VAS stage is a full of components board, there is also an other little board(+1) only for to mount the Yamaha double n channel JFET 2SK100
|Yamaha 2SK100 Y-K100 JFET|
Next Step: let's find trouble!!!