Seems to have synthesizer issue in this Cobra 2000. I am getting 8 volts at Test point 9. It should be around 2.7 volts and adjustable through L19. But L19 turning L19 doesn’t change the reading.
When i connect scope to test point 10 for L21 adjustment or to test point 1 for L20 adjustment, turning L19 here does affect those readings. But i can only get L21 to about 650 mv when it should be about 3.4 volts. And I can only get L20 up to about 36 mv when it should be about 190 mv.
All VCO voltages seems to be right on.and PLL seems to be ok as well. In case it matters this PLL is MB8719 and radio is mod for extra channels
Could L19 be bad?
any Help is appreciated!
When i connect scope to test point 10 for L21 adjustment or to test point 1 for L20 adjustment, turning L19 here does affect those readings. But i can only get L21 to about 650 mv when it should be about 3.4 volts. And I can only get L20 up to about 36 mv when it should be about 190 mv.
All VCO voltages seems to be right on.and PLL seems to be ok as well. In case it matters this PLL is MB8719 and radio is mod for extra channels
Could L19 be bad?
any Help is appreciated!
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