[Premium-Rx] CUBIC-CDR-3250-LF-HF-DSP-COMMUNICATION-RECEIVER

[Peter Hamilton]

Jay,

I think we're seeing a pattern here! Didn't see your earlier post until I'd
sent mine.

Cleaning up the PSU board and replacing the electrolytics is probably
worthwhile regardless of whether there's a fault. The parts are easy to
find and don't cost much, and it's an easy job.

I suspect there was some collateral damage in the Rx with the PSU that went
bang, as there were several other faults, all in the RF module. All except
one were consistent with a power rail surge (normally robust active devices
not in the signal path were dead for no apparent reason).



--

Peter (G4VLC)


On 1 January 2016 at 14:05, <jrusgrove at comcast.net> wrote:

> Peter
>
> Interesting on the glue blob issue. I didn't mention that earlier thinking
> it was probably a one off with the unit I was working on.
>
> Same here ... it was under the 220 uF / 35 v electrolytic. Trace was
> intact but fiberglass was charred. Dug out all charred material and applied
> a mixture of epoxy and fiberglass 'milling powder'. Once harderened I
> touched up the area with a green conformal coating repair pen. That was the
> only glue blob that had a problem but, like you, I removed all other signs
> of glue when replacing the other electrolytics.
>
> Thanks for the confirmation that this isn't wasn't a one off situation!
>
> Jay W1VD
>
>
>