Power amplifie Supply Board. Output 3 line voltage +- 71V.
Size: 120x150x63mm
with short circuit, overcurrent, overvoltage protection, as well as midpoint voltage speaker protection, To the amplifier horn protection board, power amplifier midpoint voltage abnormal shutdown output voltage.
From the board A, B two solder joints outside a normally open temperature switch can also be done temperature protection, should have all the protection functions.
Power panel 220V rectifier
Use 2 small original Japanese chemical 1000U capacitors
With 150U small capacitance
The switch tube is used IRG4PC50W (TO-247) High current IGBT power tube. (note that the large volume TO-247 package of high-power tube, not the kind of TO-220 small size in the power package tube comparable)