MOTM

when i screw all four corners down to my stooge rails, the s&h does not sample.
it just holds. if i tap on the front panel with my finger, it samples the
input in time with my fingertaps.

i thought this was cool for about 5 minutes, but now i want it to work right
again.

if i take a couple screws out, the s&h works normally.
so, i think some pressure on the frontpanel must be aggravating a poor solder
joint.

instead of touching all the solder points on the board, are there a few
particularly suspect i might go after first? maybe the pots first? any
suggestions welcome, thanks!


____________________________________________________________________________________
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This is one of 2 things:

a) bad solder joint (most likely).
b) a tiny crack in the pc board trace

The S&H is the LF398 IC U6. It can be the Track/Hold switch soldering, or
the wiring on the CLK (J5).

Paul S.

----- Original Message -----
From: "loopcycle" <loopcycle@...>
To: <motm@yahoogroups.com>
Sent: Monday, October 01, 2007 12:03 PM
Subject: [motm] funny problem with s&h module


> when i screw all four corners down to my stooge rails, the s&h does not
> sample.
> it just holds. if i tap on the front panel with my finger, it samples the
> input in time with my fingertaps.
>
> i thought this was cool for about 5 minutes, but now i want it to work
> right
> again.
>
> if i take a couple screws out, the s&h works normally.
> so, i think some pressure on the frontpanel must be aggravating a poor
> solder
> joint.
>
> instead of touching all the solder points on the board, are there a few
> particularly suspect i might go after first? maybe the pots first? any
> suggestions welcome, thanks!
>
>
>
> ____________________________________________________________________________________
> Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user
> panel and lay it on us.
> http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7
>
>
>
>
> Yahoo! Groups Links
>
>
>
>

I 'touched up' the soldering on U6, and the track/hold and clk solder
joints on the pcb. Everything works perfectly now. Thanks Paul!

--- In motm@yahoogroups.com, "Paul Schreiber" <synth1@...> wrote:
>
> This is one of 2 things:
>
> a) bad solder joint (most likely).
> b) a tiny crack in the pc board trace
>
> The S&H is the LF398 IC U6. It can be the Track/Hold switch
soldering, or
> the wiring on the CLK (J5).
>
> Paul S.
>
> ----- Original Message -----
> From: "loopcycle" <loopcycle@...>
> To: <motm@yahoogroups.com>
> Sent: Monday, October 01, 2007 12:03 PM
> Subject: [motm] funny problem with s&h module
>
>
> > when i screw all four corners down to my stooge rails, the s&h
does not
> > sample.
> > it just holds. if i tap on the front panel with my finger, it
samples the
> > input in time with my fingertaps.
> >
> > i thought this was cool for about 5 minutes, but now i want it to
work
> > right
> > again.
> >
> > if i take a couple screws out, the s&h works normally.
> > so, i think some pressure on the frontpanel must be aggravating a
poor
> > solder
> > joint.
> >
> > instead of touching all the solder points on the board, are there
a few
> > particularly suspect i might go after first? maybe the pots
first? any
> > suggestions welcome, thanks!
> >
> >
> >
> >
____________________________________________________________________________________
> > Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s
user
> > panel and lay it on us.
> > http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>