Help me understand the 630 horizontal circuit

[miniman82]

It's not ansynchroguide, I said that in the beginning. I found somewhere that the 630 had a synchro-lock circuit, must be what the synchroguide evolved from.

In any event, I'm going to do what wayne suggests and look at the discriminator. There's got to be a reason why it's acting up, just need to figure it out.