How to add a jack input / line in to this JVC RC X610 station

[toomazoo]

Hello!
I would like to know where I can do a solder to connect a jack input on this device which does a very good job, except than that. Apparently it would have to be done between the fm preamp and the main amp. But well, I don't know where it is, when I open the beast. Anyone knows more than me about this kind of boards?

 

[ramussons]

One place is the volume control.

 

[toomazoo]

What do you mean?

 

[ramussons]

Does this have a volume control?
The "wiper" terminal goes to the amplifier, the "non ground" to the tuner output.
That is where you can feed an external input. Use a jack with a changeover.