Now...Before people start screaming...
Review this again...
[ATTACH=full]41760[/ATTACH]
L50 - along with C60 - form a special type of filter for the PLL chip - to help it in reducing a problem of Ringing in the lines that can change how the PLL works in the loop system and how it corrects errors.
[ATTACH=full]41761[/ATTACH]
Locate Pin 1 and Pin 18 - then locate Pin 10 - C60 and C197?
Better stop and locate at least one...
Why?
If this radio was ever "strapped" this can force the grounding point potentials to shift from one pin to another pin simply because power flows like water - thru the path of least resistance.
Fortunately Pin 18 and 10 are "tied" - then released to ground thru Pin 18.
Why the worry?
Because of the radios insulated chassis was ever bonded to ground - Pin 18 and Pin 10 show bonding - but as was discovered earlier by the OP - that Pin 10 was left open and not connected. That was intentional.
Once you connect it, you're left to the mercies of power flowing thru real ground and earth grounds versus the Ferrite bead lead and a noisy ground platform.
The Pin 18 and 10 grounds can cause the "earth ground" potential difference to Board ground - from strapping bonding the panels to the board ground - to look at Pin 10 more than Pin 18 - by inductive means of routing and length of trace run. The ground potentials can and will be different - if only briefly during power up.
The PLL's are not bulletproof, but as they age, the input pins are constantly subjected to static potentials - this is the rub - Pin 10 can be the noise shield grounding "buzz - humm" that can destroy the chip even if it is off - just sitting there.
