[ICOM] IC761 problem

[Jeff]

zl3kr wrote:
> Having repaired the power supply in my IC761, on the surface it appears 
> to be working with the digital readout tuning ok and bandswitching ok
> but it sounds like the frequency is uncontrolled as if there was a PLL 
> oscillator unlocked with various hetrodynes drifting across the band pass
> and it does not receive anything on the frequency it shows it is tuned 
> to as I have tuned a Grid Dip Oscillator across that frequncy.
> With my limited knowledge  I am not sure if the PLL oscillators in the 
> radio also control the digital readout or not.
> Any suggestions as to the likely place to look for the problem please??
>
> Alan ZL3KR
>
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Not sure if this will help but heres some info:


      Knowledge Base Article 5BAH3229A3

Issue
My 761 has noise in RX, birdies.

Resolution
The voltage regulators on PLL unit are oscillating. Replace overheated 
C128, C129, C132 and C137 regulator filter capacitors on PLL unit.

Category
Amateur : HF : 761

Best Regards Jeff kd4lyh