[Icom] PS Question

Thu, 01 May 2003 23:38:14 -0700

I've heard that one common thing between the 761 & 765 is the power supply.=
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My 765 started doing exactly what you're encountering. It took a lot of=20
work to get to the power supply board & there's a resistor(?) which is=20
about 3/32" by 5/32" by 1" & the Icom troubleshooting said to resolder it.=
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It also stated to be careful to not solder beyond the holes on each end of=
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the copper. That solved my problem nicely.

73 - Larry W=D8NFU
[email protected]

At 09:51 PM 5/1/2003 -0500, you wrote:

>Hi Folks,
>
>Well, now I am working on the PS 35 switching power supply for the 761. It
>puts out 13.8 volts like it should but when a current draw of about 5 amps
>is reached, it starts tripping on and off.
>
>The current sense adjustment does not have any effect.  I made a power off
>resistance check on the diodes and transistors and they match the PS 740
>that I have.
>
>Any experts out there on the switching supplies like the PS 35??
>
>Thanks
>
>         William J. Diamond (Bill)
>         Rogers, Arkansas USA
>         [email protected]
>
>         Ham Radio Operator WR=D8T
>       Flying The Flag Long Before
>             It Was Popular
>
>  Please Visit My Icom Radio Page At
>
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>
>
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