Restoring Boemaster 3000

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Taavi Posted: Mon, Mar 20 2017 10:14 AM

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Hello I'm new this forum

Sorry for my poor english, I have B&O 3000 amplifier and I try to fix it.

Both channel  are broken.

I have changed left/right side capacitor

100µF 35v 3+3, pcs (475,553,473,558,447,553)

47µF 50v 1+1 pcs (458,546)

 22 µF 63v 1+1 pcs (472,561)

10 µF 63v 2+2 pcs (420,500,412,505)

And also left channel

TR.62 org.BC311 à 2SA1020Y

TR.64  org. 2N3055 à2N3055

Now the left channel works well

And Right channel

TR.49  org. 2N3055 à2N3055

TR 43 org. BC183L à BC183A

TR.44 org. BC310 àBC639-16

TR.46 org. BC262B à BC415A

TR.47 org. BC311 à BC161-16

Right channel input 60V (red wire) quiescent current should be ab.100mA ?

when I tested (ampere meter range 0.6A) and as soon as the power cord a bit touched the pin, meter jumped to the bottom

When I put the right channel external power supply (0-25V), so it works (25v) and the current is only n.20mA.

Should there be any tips how to fix.

 Replaced transistors are too different from the original ?

suggestions for better transistor ?