Prev: File this book under "Fiction".....
Next: WNTD: Service man or just schematic for SONY AVC-3200 video camera
From: DaveC on 1 Feb 2010 11:59
> On Sun, 31 Jan 2010 12:49:09 -0800 DaveC <invalid(a)invalid.net> wrote in
> Message id: <0001HW.C78B2CC50195EC48B0B2D9AF(a)news.eternal-september.org>:
>
>>> All my experience is with the 540, but I think you're wasting your time
>>> trying to troubleshoot ANYTHING
>>
>> OK, I suspected that, but non-functional buttons seemed a symptom not
>> related
>> to caps issue. But I'll take your advice to heart and do *all* the caps.
>>
>>> until you replace ALL, AND I DO MEAN
>>> EVERY SINGLE ONE on every board, the caps and CLEAN
>>> CLEAN CLEAN and CLEAN again the circuit boards.
>>
>> Yeah, I plan to do that. Making a complete list right now.
>>
>> What techniques and chemicals did you use?
>
> I use Simple Green with a good non-metallic brush, then follow up with 90%
> isopropyl alcohol. For the rubber membrane contacts VERY gently clean with
> alcohol and pat dry.

Thanks JW for your reply.

Serious cleaning ahead!

Dave

From: DaveC on 1 Feb 2010 12:02
> The method I use for cleaning those conductive pads on button switches
> (keyboards, IR remote controls, etc) is very lightly scuffing them with a
> pen-type tool that has strands of glass fibers in it.
> [...]
> WB

Thanks for that input Bill. I'll see if scrubbing lightly helps.

The flex pcb switch contacts are more what I suspect than the button. And
those are seriously fragile. It looks like a tiny bead of carbon-filled
rubber cement. I dented a trace (actually chipped off a *tiny* piece) with a
DMM test probe. Yikes!

Thanks again,
Dave

From: DaveC on 1 Feb 2010 12:03
> Tektronix has an excellent user forum covering these sort of repairs.

Thanks Nico. I'll check it out.

Dave

From: DaveC on 1 Feb 2010 13:11
> Tektronix has an excellent user forum covering these sort of repairs.

Nothing I could find regarding the button switches.

Can you point me to a Tek forum topic about button contact repairs?

Thanks,
Dave

From: Nico Coesel on 1 Feb 2010 16:02
DaveC <invalid(a)invalid.net> wrote:

>> Tektronix has an excellent user forum covering these sort of repairs.
>
>Nothing I could find regarding the button switches.
>
>Can you point me to a Tek forum topic about button contact repairs?

I'd register and post a question there.

--
Failure does not prove something is impossible, failure simply
indicates you are not using the right tools...
nico(a)nctdevpuntnl (punt=.)
--------------------------------------------------------------
First  |  Prev  |  Next  |  Last
Pages: 1 2 3 4
Prev: File this book under "Fiction".....
Next: WNTD: Service man or just schematic for SONY AVC-3200 video camera