Interesting idea. Strange but after disconnecting the big transformer form the main supply and analog part stopped working , now when I tried it like a CD transport it sounds very nice, better if the analog part is working . May be as you suggested I can take out all BG and Jensen capacitors and just use it like a good CD transport.
I found the following things:
1.The AC after the transformer for the analog part is 2 x 40 V
2. After the diodes the voltage is + 55V DC, -55 V DC
3. the voltage regulators for the analog part are made with bipolar transistors : TIP 32C for the + V and probably TIP 31C for the -V ( I could not see it)
4 one regulator for the right channel, one for the left channel
4. the voltage after the transistors which goes to the analog part is +46 V -46 V
5. One of the TIP 32 C runs very hot if you compare with the other 3 transistors, the voltage before that transistor is +52 V , 3 volts less than the identical transistor for the other channel. But the voltage after this transistor is +46 V,the same like the other one simmetrycal to it . The over hot transistor is part of the regulator which is for the right channel where is the noise.
6. Because I suspected that the big yellow Jensen capacitor are input capacitors for the output stage, I removed from the PCB the leg which I thought is the input of the right channel and the signal stopped for the right channel ( no music). The noise lower a bit level but it was still there.
That is for now. Any tips will be much appreciated
1.The AC after the transformer for the analog part is 2 x 40 V
2. After the diodes the voltage is + 55V DC, -55 V DC
3. the voltage regulators for the analog part are made with bipolar transistors : TIP 32C for the + V and probably TIP 31C for the -V ( I could not see it)
4 one regulator for the right channel, one for the left channel
4. the voltage after the transistors which goes to the analog part is +46 V -46 V
5. One of the TIP 32 C runs very hot if you compare with the other 3 transistors, the voltage before that transistor is +52 V , 3 volts less than the identical transistor for the other channel. But the voltage after this transistor is +46 V,the same like the other one simmetrycal to it . The over hot transistor is part of the regulator which is for the right channel where is the noise.
6. Because I suspected that the big yellow Jensen capacitor are input capacitors for the output stage, I removed from the PCB the leg which I thought is the input of the right channel and the signal stopped for the right channel ( no music). The noise lower a bit level but it was still there.
That is for now. Any tips will be much appreciated
