Quote:
Originally Posted by Yamamaya42
So far, replacing caps has not helped 
https://imgur.com/uodtlrG
almost all caps in the OSC circuit new, point J grounded, this is as close to 3.579545 i can get.
not sure what else to try other than replacing the carbon film-resistors that were put in there with 1% metal film.
The crystal IS OK. removed and tested in x-tal tester, it was on freq.
and got a really neat pic with crystal removed, all reds were green, there was color lock, so burst amp and related circuits are working. not sure what else to look at other than the resistors that were put in before i got it, I only checked visually they they were right value. 5% carbon film in there now. |
Hard to believe you're off that much with the crystal in place (800 KHz low!), especially since the crystal tests to be the right frequency on a crystal meter. I suspect your frequency meter is reading really off. If the frequency were this far off, you would have fine rainbow stripes that might not even be visible.
Also agree that the green without the crystal is an indication that the oscillator is not running.
More sleuthing needed. Dumb question, but do you have any scope probes, meters, jumper wires, or etc. attached when you are trying to tune the oscillator frequency? Which caps in the oscillator circuit are NOT new?