Assuming the amplifier part of this unit works,
What would be the possibility of being able to solder in a 3.5mm jack lead so that something plugged into said lead would play through the amplifier/speakers?
I think I saw a company offering old original audio units modified in a similar way at the NEC Classic a year or so back.
It is always possible, but the usual high density in this kind of design might well require sacrificing another function to just fit a socket, let alone break into a suitable point in the circuit.
Given a proper circuit schematic it becomes easier, but even then it is probably not worth the expensive expert time and effort.
The end result might still be disappointing because modern amplifiers tend to have much higher audio quality and better reliability.
Yes, I’m assuming that the CD and cassette are not working so was thinking along the lines of using one of their inputs.
Not a “electronic whizz”, but:
I think the CD player connected to the main head unit by a DIN socket:
But this is 13 pin, not 7 pin
Such leads obviously exist:
I like Saz’ options, but they are for different HUs.
Simplest solutions are always the best, and if there is a socket on the back then it is best to use it.
Failing the presence of a connection on the back, if you can find the service manual with the circuit diagram and board layout etc for that 1C01 Panasonic (their manuals are usually very good) then I can tell you where in the circuit to make the connection. It will probably have a different and more useful reference number hidden on the back of the unit.
Have you a good photo of the back?
It is the same unit as in Saz’ post but has the CD player with it. The CD player is a separate unit.
So, what about this one 
Ah I was fooled by the components being the other way up, CD at top, vs CD at bottom.
That DIN plug on the back is the obvious solution. DIN plugs are readily available in a vast range of pin configurations. You just need the pin connection data to be able to put in a signal or even power another module hidden in the CD chassis. I gather the laser dies in those and they are made of unobtainium.
The same logic applies to any other units however; if you can find a ready made lead that will plug in, then that is the answer.
Anything that requires surgery becomes time consuming and requires information - such as the circuit diagram etc.
In the cage, when there is no CD player, the cassette unit is always fitted at the top, for obvious reasons.
In the Jag XJ, the Alpine system fited as standard, is a complete electronics nightmare, completed with fibre optics. Obviously state of the art at the time. The multichanger (commonly used in Mercedes, Range Rovers, BMWs of the same vintage) is fairly unreliable now, requiring sometimes specialist tools from Glok or Makarov.
I just use a cheap FM transmitter now. They work far better than they used to do, and the one I have only seems to struggle a bit in very built up areas.
A while back I bought a little device that you plug into the earphone Jack of your phone or MP3 player etc. and transmits a signal very locally which you tune your radio to and play your music through the radio, if you’re interested I can get it and give any details, it was only a few quid, used it back in march in my MK2.5 which doesn’t have aux. input.
Dave
