Hi,
I have a SABA MI212 amplifier, it works, but there is a transistor and a resistor that become pretty hot (about 100-120°C) at moderate volume. The heat is dependent of the volume.
Here is the schematic : http://www.saba.pytalhost.com/MI212s/mi212-04.jpg
It's about R672 and T672 (bottom right of the schematic).
In my opinion, regarding the schematic, T672 is the cause of the problem, R672 has already been replaced.
Am I right ? If so, the BD388 is obsolete, but can I use a transistor with similar specs, except with a bigger hfe ? I know hfe is important in some cases but in this case I don't know.
Thanks for your help !
I have a SABA MI212 amplifier, it works, but there is a transistor and a resistor that become pretty hot (about 100-120°C) at moderate volume. The heat is dependent of the volume.
Here is the schematic : http://www.saba.pytalhost.com/MI212s/mi212-04.jpg
It's about R672 and T672 (bottom right of the schematic).
In my opinion, regarding the schematic, T672 is the cause of the problem, R672 has already been replaced.
Am I right ? If so, the BD388 is obsolete, but can I use a transistor with similar specs, except with a bigger hfe ? I know hfe is important in some cases but in this case I don't know.
Thanks for your help !