Now it's time to ...

[amr2]

Hello. If you want to use Proteus, you will need to draw the schematic in Proteus, using its own library. Proteus has a module for schematics, and another for simulation. It's not complicated, but you need to know what conditions you want to simulate.
There are free alternatives like LTspice

 

[Yamaha5000]

This may not have been a great circuit design from the inception Based upon your opinion it may be a good idea to disable this circuit from the amp and use your devices.

How does one purchase the Protection Board being discussed in this Thread?

 

[amr2]

eBay or Alixpress. This for example.
Keep in mind that they are mono modules, you will need 2 units. You also have stereo options, like this one.
You must check that you have adequate power supply for them (12V)
btw, I changed the capacitors for quality ones.

 

[Yamaha5000]

eBay or Alixpress. This for example.
Keep in mind that they are mono modules, you will need 2 units. You also have stereo options, like this one.
You must check that you have adequate power supply for them (12V)
btw, I changed the capacitors for quality ones.

Thank you

 

[amr2]

Thank you

you are welcome

 

[Yamaha5000]

I do have this power supply connection available at R721, your thoughts?

 

[amr2]

if i were you, I would repair the original circuit....But if don't, maybe you can use BE (you have to measure the AC voltage)

 

[amr2]

I think that should be discussed in a dedicated thread...

 

[Yamaha5000]

I think that should be discussed in a dedicated thread...

I agree

 

[Yamaha5000]

if i were you, I would repair the original circuit....But if don't, maybe you can use BE (you have to measure the AC voltage)

This is a bit confusing, do they want AC or DC?

 

[amr2]

This is a bit confusing, do they want AC or DC?

View attachment 2747568

You can use AC or DC