[ICOM] IC761 problem

[Alan]

Hi Clete,
  yes I believe most of the receiver is working ok but either the Ist 
Oscillator which mixes to produce the 70 Mhz 1st IF is either not 
running or is somehow disconnected.
One thing that may also have some bearing on the matter is that I have 
just finished repairing the power supply, and one thought is that as the 
PLL unit seems to be mounted just below the power supply I am wondering 
if maybe taking the power supply in and out during repair I could have 
damaged a wire maybe carrying the HT to the PLL unit or something 
similar. I have checked that all the co-ax cables are plugged into their 
sockets.
I will see if I can manage to check around the PLL board with my 
Frequency Counter and try to pick up the Oscillator output. The main 
problem is that I know enough to probably get myself into a lot of 
trouble but it sure aint easy trying to work around these crammed PC 
Boards  lol
Also Gary I will try to find my way around the board to see if I can 
find a point that will give me some voltage checks. I do have a workshop 
manual for it but as yet I havent been able to see where there are any 
check or test points.
I appreciate your answers so far and hope it will help me get the darned 
thing back on the air soon.
Alan ZL3KR




On 20/05/2010 10:56, C.Whitaker wrote:
> de WB2CPN
> It appears that the receiver is working, but we have
> no idea what frequency it is really tuned to.  The
> block diagram will tell you a lot.  Good Luck.
> 73  Clete
>
>
>
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