old TEK 475 problem

[Fred Abse]

On Fri, 08 Aug 2003 05:42:38 +0100, Jim Adney wrote:

Tek particularly advises AGAINST cotton swabs or "carbon-based
solvents," by which I assume they mean carbon tet, etc.

One would assume so, but taken literally, it precludes isopropyl alcohol
as well.

--
Then there's duct tape ...
(Garrison Keillor)
nofr@sbhevre.pbzchyvax.pb.hx

 

[Jim Adney]

On Sun, 10 Aug 2003 16:56:30 +0100 Fred Abse
<excretatauris@cerebrumconfus.it> wrote:

On Fri, 08 Aug 2003 05:42:38 +0100, Jim Adney wrote:

Tek particularly advises AGAINST cotton swabs or "carbon-based
solvents," by which I assume they mean carbon tet, etc.

One would assume so, but taken literally, it precludes isopropyl alcohol
as well.

Right, but I suspect that this was just a rare weak moment in the
manuals writer's day.

-
-----------------------------------------------
Jim Adney jadney@vwtype3.org
Madison, WI 53711 USA
-----------------------------------------------

 

[Fred Abse]

On Mon, 11 Aug 2003 06:06:29 +0100, Jim Adney wrote:

Right, but I suspect that this was just a rare weak moment in the
manuals writer's day.

I know the feeling.

--
Then there's duct tape ...
(Garrison Keillor)
nofr@sbhevre.pbzchyvax.pb.hx

 

[George R. Gonzalez]

Agggh!!! Don't use a Q-tip on these switches! The guy that suggested this
*may* have been thinking of the switches on the 465M? was it, that had
big sturdy open contacts. On the 475 the switches are these very fragile
little gold-plated forks, about the size a flea would use to eat his salad
(if fleas were vegetarians...). The cotton on a Q-tip is just going to snag
on the tines.

Instead try just one drop of alcohol per fork, then turn the switch a few
times.
Usually works.

Other times, the problem is in the little pins on the bottom of the little
block-attenuators.
You'll know this is the case if the above trick doesnt help, and pushing on
the top of the attenuator boxes does.

The pins and sockets of these are made of pure corrodium, to minimize
thermoelectric effects or imrove service dept sales I guess.. Again a light
cleaning of the pins with alcohol should help. In extreme cases you could
try a little light abrasion with a pencil eraser.