[rodgersorgan] Re: Help with Rodgers pipe control system
- From: "Richard Torlai" <rltorlai@xxxxxxx>
- To: <rodgersorgan@xxxxxxxxxxxxx>
- Date: Sat, 2 Aug 2003 21:28:58 -0400
If the system is meant to run on 15 volts and you have that in schematic form
and you are currently running 19. something that IS your problem. Too much
voltage blows transistors and makes things run flooky, if they run at
all.Somewhere there is a circuit that isn't activating(doing it's job) because
something else is either open or shorted. I'd go back to the component that
fries easily and take a look at components before that one. SOmething is
cooking and it ain't eggs and bacon!
I don't have a schematic but I'd put a scope on the system and see where th
problem lies.
Rich
----- Original Message -----
From: Paul Soulek
To: rodgersorgan@xxxxxxxxxxxxx
Sent: Saturday, August 02, 2003 7:02 PM
Subject: [rodgersorgan] Help with Rodgers pipe control system
Hi List!
I'm having a problem with my Rodgers pipe control system---each time the
organ turned on and power is applied to the driver boards, one of the
pipe driver chips pops and smokes (it doesn't matter which one...each
time it's a different one). Two local electronics techs. isolated the
problem down to "hex Schmitt trigger" (a "4106") that interprets and
distributes the Clock-Strobe-Data information. We replaced the "hex
Schmitt trigger" on our chests with parts from the local Rodgers tech
(local means a 140 mile drive yesterday :-) , but we still have the same
problem. (this is the gedackt chest)
Now we are having problems with the principal chest also. When the organ
is turned on, all of the pipes go on at once. We unplugged the
clock-strobe-data to the driver board so that just the power was hooked
up. Same thing happened---all of the magnets opened. Our electronics
techs. tell us that this was a problem with the hex Schmitt trigger
too---but replacing it does no good.
One useful piece of information on both of these items could be the
voltage---the system is supposed to use 15 volts, but when tested, it
shows around 19.2 volts. Could this have "burned out" the "hex Schmitt
trigger" so that strange things happen? (driver chips blowing up, grand
cyphers...) Or is this reading normal when there is no load on the power
supply? (the two "electrical people" that looked at it seemed to think
that it was normal)
I'm lost (and somewhat disappointed). Any help that any of you could
provide would mean the world to me.
Thank you!!!!!!
Paul
!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Find new MIDI music and Guides to Rodgers Organs at www.frogmusic.com
To post send messages to: rodgersorgan@xxxxxxxxxxxxx
To unsubscribe or change mail delivery (digest, vacation)
go to www.frogmusic.com/rodgersmem.html
!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Find new MIDI music and Guides to Rodgers Organs at www.frogmusic.com
To post send messages to: rodgersorgan@xxxxxxxxxxxxx
To unsubscribe or change mail delivery (digest, vacation)
go to www.frogmusic.com/rodgersmem.html
Other related posts:
