Vintage Simmons Drums (UK) Users Group

Installed now is an RS 261-491

http://se.rs-online.com/web/cpd/0261491/?searchTerm=261-491

WT

----- Original Message ----- 
From: <Jacquot.Patrice@...>
To: "Simmons Drums" <Simmons_Drums@yahoogroups.com>
Sent: Saturday, September 17, 2011 4:16 PM
Subject: Re: SV: [Simmons Drums] SDS7 repairs


you can send me a pic of it  so I could look if I have one ?
Tell me via private mail.
good luck,
Patrice.



----- Mail d'origine -----
De: KW
�: Simmons Drums
Envoy�: Sat, 17 Sep 2011 07:26:24 +0200 (CEST)
Objet: SV: [Simmons Drums] SDS7 repairs


























      i'm really sorry to hear this, hope help comes soon buddy!



/k



________________________________

Fr�n: WT <waveterm@...>

Till: Simmons_Drums@yahoogroups.com

Skickat: fredag, 16 september 2011 22:52

�mne: [Simmons Drums] SDS7 repairs





So,



my SDS7 died a few weeks ago.



It has 12 modules and runs very hot. The rectifier for the +5V made a noise

and the display flickered in and out.



I�ve removed all modules and the CPU starts and run with no problem.

Reseating modules one at a time works fine but the more modules that are

connected, the more there is noise on the +5V rail ( no kidd....lol ). The

VCO�s sound garbled and the audio output has hum.



I have replaced the capacitor on the +5V rail but there is still around 1V

AC half wave noise on it. Both before the regulator and after the regulator.

This leads me to believe that I need to replace the rectifier bridge with

one that can output more current.



Does anyone have any suggestion for a suitable one ?



WT



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