Ok, got a new plan. After looking @ the JP4 service notes and poking around inside the JP4, I notice the negative volts out of the power supply is -16.23v and I can't trim it back to -15v ,this can greatly affect the tuning, so I have to fix this first.
Question: Has anyone run into this before?
I'm planning on replacing the regulator and the electroylic caps.
Any advice would be appreciated.