[DSP-10] PLL Problems

[Tan Teik Chuan]

U7-11 shows a DC voltage and voltage at R54/U6-6 junction is at about 4.6V. 
So, 19.68 MHz PLL is locked.

I've removed the ground from the junction R105/C113 so that it won't stay 
unlocked. I've tried to screw the L102 coil to the bottom, to the center, 
and even remove it. But, the voltage at R104/R105 junction is either at 
about 5V or about 6mV, can't get to the range between 4.7V and 0.3V. Is it 
something wrong with my board? Or it just couldn't lock with C117 being 10pF 
for my case?

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