[ms660]

The schematics in the 3rd and 7th photos are the main ones of interest for the video and sound processing.

3rd photo....the two IC's on the right hand side...the top one is the IF and video detector, the output from that is the composite output from the 5th connection down from the top on the IC's right hand side, it's fed via a coil to the 6Mhz sound carrier filter, the output from that feeds the bottom IC, that IC demodulates the sound and feeds it to the two audio output transistors that can be seen below it.

For the video it's back to that coil, there's another a feed from that coil to a two transistor DC coupled amplifier (to the left of the bottom of the top IC) this amplifier amplifies the composite video signal, the output is taken from the emitter circuit of the second transistor, it then goes three ways...

One to the timebase IC (on the left hand side of the schematic) for sync purposes etc...

One to supply a composite signal to the chroma decoder IC in the schematic in the 7th photo (tagged as comp video at the input to the chroma module)….

And one to the luminance amplifiers, you can see the luminance delay line between the bottom transistor and the next one up in the middle of the schematic in the 3rd photo.

The output from the luminance amplifier is coupled to the emitter circuits of the RGB drive amplifiers on the CRT drive board in the 7th photo (tagged as luminance at the input to the board)

The above isn't meant to be a fault finding guide but just a brief explanation of what signals go where.....so far as I can make out from the photo's.

It might help you to understand what's what in that department.

Any errors in the above then I'm guilty as charged.

Good luck whicheverways.

Lawrence.