[ICOM] IC765 - no rx

[Gary P. Fiber]

Bert,
I have to ask he does not have the RF gain turned all the way down does he?

Is the RX out to RX in jumper on the rear panel in place?

Whats his S-meter doing? is it pegged?

Sometimes DP-6 goes bad, the S-meter will peg and the receive signal 
will be gone. DP-6 is in a metal can on the display unit.
Usually the -5 volts supply is missing from DP-6. Sometimes the problem 
is cracked solder joints on the pins, not where they attach to the 
display circuit board but where they come out of  DP-6 itself. Remove, 
reheat and re-solder those pins and a reinstall many times will fix the 
entire problem. If the receive comes back after the PTT is pressed and 
released generally I would suspect a TR relay. There is also a relay in 
the receiver circuit that may be open so far as I remember. You will 
need to trace the signal through from the antenna jack. Will not be too 
hard as that relay will be almost right after the path breaks between 
the transmitter and receiver. It should show up on the schematic very 
near the antenna connector.

Hope some of this helps

Gary K8IZ


Bert Almemo wrote:
> Hi huys,
>
> I have a friend with a 765 that has no receive. Transmit works in all modes
> with full power. The receive function disappeared instantly - not gradually.
> Trim caps are not replaced. That's all info I have. Ideas?
>
> 73 Bert, VE3OBU
>
>
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