Vintage Synth Repair

Hi Rich
Contact me off list and I will try and help you through this problem. I
don't think it's in the keying box. More likely it might be a dirty chime
switch. Does the high octave keys work above the chimes section? The chimes
are a 25 note section beginning at middle C on the lower keyboard. It's good
that you have the complete service manual. Does the Melodia play at full
volume on the notes below middle C? Doe all the other voices play at full
volume? The pizzacot and bongo voices only affect the upper manual. So it
sounds like you may have two problems. 

Keith A. Niver
Certified MITA tech
Niver's Service Corp
801 Columbia St
Hudson, NY   12534
518-828-0616, Bus
518-755-6960, Cel
kaniver@...
 

-----Original Message-----
From: richmarionohio@... [mailto:richmarionohio@...] 
Sent: Sunday, March 13, 2005 6:10 PM
To: vintagesynthrepair@yahoogroups.com
Subject: [vintagesynthrepair] Wurlitzer 4520 Organ lower manual keying
circuit problems




I have a Wurlitzer 4520 (the theater horseshoe version of the 4500 
series) which has one or more problems in the lower manual keying 
circuit(s). The Melodia voice is dead from C# (key #38) upwards 
which also affects the chime voicing and the Pizzacato and Bongo 
percussion signals. I was told by a Wurly tech to look at "the 
coupling capacitors on the lower manual keying circuit box" but I 
have no idea which caps he's referring to. He's in Missisippi and 
I'm in Ohio so it's not like he can come over and have a look. I 
have complete schematics for the organ and some limited experience 
in organ repairs. I would like to talk this out with anyone who 
might be more knowledgeable with this type problem so I can get this 
magnificient instrument back in full operation. Thanks in advance!! 






 
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