[SBE] Symetrix 528E switch help

[Ben Weiss]

Assuming that the problem is switches and it most frequently is here's an
idea.  This also assumes that the unit is mounted in a permanent location
for a fixed application.  Hard wire the switches to operate in the position
you use them.  This cures the poor switch contact problem once and for all.
It may not be the Symetrix way but it sure fixes the problem.  Spraying the
switches with a contact cleaner is a temporary fix at best.  Cap replacement
is another matter but switch problems are usually the first problem to
surface.

 

Ben Weiss

 

  _____  

From: sbe-bounces at sbe.org [mailto:sbe-bounces at sbe.org] On Behalf Of Bob
Stroupe
Sent: Thursday, July 09, 2009 2:35 PM
To: sbe member discussion mail list; 'sbe member discussion mail list';
radio-tech at broadcast.net
Subject: Re: [SBE] Symetrix 528E switch help

 

Ed:

I have about 40 528E's in my studio complex and some have been mounted so
that they got pretty warm.  We have successfully cleaned any switches but
have had major problems with the electrolytic capacitors after a number of
years.  Heat doesn't help those and have done and continue to do
"capectomies" as needed by replacing all the caps in the unit (including the
surface mount coupling caps).

Good luck, 

Bob Stroupe

-----Original Message----- 
From: Bo 
Sent: Jul 9, 2009 2:41 PM 
To: 'sbe member discussion mail list' , radio-tech at broadcast.net 
Subject: Re: [SBE] Symetrix 528E switch help 




Personally I've never had anything from Symetrix that works as promised
except their 421 and 422 AGC units.  I much prefer Behringer or ART tube
preamp/processors.  They offer a warm, but true sound that most made for TV
oriented gear can't match.

 

But honestly, I don't know of any equipment that will last for long above 90
degrees unless it is built to military specs.

 

Good Luck,

Bo Bratcher

Video Engineer - MetroTV

Louisville Metro Government

 

 

 

From: sbe-bounces at sbe.org [mailto:sbe-bounces at sbe.org] On Behalf Of Edwin
Bukont
Sent: Thursday, July 09, 2009 10:30 AM
To: sbe; radio-tech at broadcast.net
Subject: [SBE] Symetrix 528E switch help

 

Please reply off list if possible as I do not seem to be getting the
radio-tech list reflector
 
I have five Sym 528E mic processors all with the same issue.
 
Units were mounted one atop the other is a wooden rack in a studio with no
HVAC.  The room itself was probably 95-deg and the units were literally tooo
hot to touch.
 
All the units exhibit the same issue.  Audio does not flow reliably through
the unit.  The problem is the blasted plastic shadow (might be other
manufactuer) alternate action push button switches.  They look like shadow
anyway. Excersizing them does seem to help, but the audio remains
intermittent, operating best if the switch is held firmly in.
 
I think the high heat might have corrupted the conductive lubricant that I
understand is contained within the switches.  Is anyone familiar with a
lubricant that can be used to restore proper contact operation of the
switches? 
 
OR..is this a familiar problem that necessitates component replacement?
 
These units are only 6 yrs old, have seen very little use.  Sym wants
$100-240 per unit plus shipping for repair.  I can buy an 8-channel preamp
for less than that.
 
Thanks

Edwin Bukont CSRE, DRB, CBNT 
V- 240.417.2475; F- 240.368.1265 

 










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