Vintage Synth Repair

Call Morelocks and get a service manual to start. If you are familiar with
tracing circuitry, then you can probably find the problem. I am betting on a
problem in the pedal keyer ic on the pedal board or some chewed and shorted
wired. If you are not comfortable with going any further, then go to
www.mitatechs.com and look at the membership list for a tech close to you.
The ic is a 40 pin large LSI ic and sensitive to static. 
 
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: vintagesynthrepair@yahoogroups.com
[mailto:vintagesynthrepair@yahoogroups.com] On Behalf Of Kate
Sent: Sunday, July 01, 2007 3:55 PM
To: vintagesynthrepair@yahoogroups.com
Subject: [vintagesynthrepair] Re: Wurlitzer Organ repair help

Thank you all very much for taking time to respond.
I checked all the plastic sticks that activate the contacts, they are 
all in place. I cleaned the contacts with non-lubricating cleaner and 
a piece of heavy paper soaked in cleaner to make sure the conacts 
were clean. I traced the wires through the organ and could see no 
obvious signs of damage anywhere. The F pedal plays an E note; I 
tried putting a piece of paper between the contacts of the E 
pedal...the F pedal still plays an E.
Any more suggestions?

Bob

--- In vintagesynthrepair@ <mailto:vintagesynthrepair%40yahoogroups.com>
yahoogroups.com, "Keith Niver" 
<kaniver@...> wrote:
>
> Sometimes it's hard to remember what happened yesterday. But when 
you work
> on them all the time, it's hard to forget. 
> 
> Keith
> 
> 
> -----Original Message-----
> From: vintagesynthrepair@ <mailto:vintagesynthrepair%40yahoogroups.com>
yahoogroups.com
> [mailto:vintagesynthrepair@ <mailto:vintagesynthrepair%40yahoogroups.com>
yahoogroups.com] On Behalf Of John Keeley
> Sent: Wednesday, June 27, 2007 11:33 AM
> To: vintagesynthrepair@ <mailto:vintagesynthrepair%40yahoogroups.com>
yahoogroups.com
> Subject: RE: [vintagesynthrepair] Wurlitzer Organ repair help
> 
> 
> 
> 
> 
> Sorry ,got it backwards.
> Sometimes it's hard to remember much of the 70's .
> John
> 
> Keith Niver <kaniver@...> wrote:
> 
> Hi John.
> We were a Wurlitzer dealer from 1957-mid 80's when they were sold to
> Baldwin. I've been a tech since 1968. Pedals have always been low 
note
> preference. The orbit keyboards were hi note preference. But you 
are correct
> about the plastic swizzle stick. It is possible they are either 
broken or
> not in the proper hole in the pedal. Unless the organ has been 
moved, they
> are probably still in there somewhere. I would still look at the 
circuitry.
> Perhaps a mouse chewed some wires and shorted them out for the bad 
pedals.If
> the customer did find any mouse droppings, they should be very 
careful in
> how they remove and clean the offending area. 
> 
> 
> Keith A. Niver 
> Certified MITA tech 
> Master Certified Wurlitzer Tech.
> Niver's Service Corp 
> 801 Columbia St 
> Hudson, NY 12534 
> 518-828-0616, Bus 
> 518-755-6960, Cel 
> kaniver@... 
> 
> -----Original Message-----
> From: vintagesynthrepair@ <mailto:vintagesynthrepair%40yahoogroups.com>
yahoogroups.com
> [mailto:vintagesynthrepair@ <mailto:vintagesynthrepair%40yahoogroups.com>
yahoogroups.com] On Behalf Of John Keeley
> Sent: Wednesday, June 27, 2007 6:58 AM
> To: vintagesynthrepair@ <mailto:vintagesynthrepair%40yahoogroups.com>
yahoogroups.com
> Subject: Re: [vintagesynthrepair] Wurlitzer Organ repair help
> 
> 
> My Mother was a Wurlitzer dealer in the 60's-70's . If I 
remember ,the
> pedals used a nylon "stick" that ran from the pedal to the contact 
switch
> .They were prone to breaking .Also,the Wurlitzer played only one 
note at a
> time on the pedal board .And play the highest note .
> John
> 
> James Cason <jlcason@...> wrote:
> 
> 
> --- Kate <bobmannn@bellsouth. <mailto:bobmannn%40bellsouth.net> 
net> wrote:
> 
> > I could use some suggestions to repair my Wurlitzer
> > Model 4373. I 
> > inherited it from my Uncle recently. It appears that
> > it had not been 
> > played in quite a while, as a lot of the keys made
> > no sound and there 
> > was a lot of static in the switches. I cleaned all
> > the contacts which 
> > restored all the keys and eliminated the static, but
> > the pedals do not 
> > work right.
> > Going UP the scale, I press the pedals:
> > C D E F G A B C
> > The sounds, however, come out
> > C D E E G G B C
> > When I play the pedals DOWN scale, neither the E nor
> > the G play any 
> > sound...I must go back up the scale to get the sound
> > (albeit the wrong 
> > notes)
> > I cleaned the contacts, made sure there were no
> > obvious shorts or 
> > crushed wiring, but no luck.
> > Anyone have any suggestions?
> > Thanks for reading this far...
> > Bob
> > 
> > 
> 
> If I remember correctly (it has been a while) that
> model Wurlitzer used a key contact that had both a
> normally closed part and a normally open part. I used
> to clean them with a rather thin rubber tool made by
> cutting a strip from a big eraser. The silver plated
> bronze contacts get corrosion. There are two wire
> contacts with a flexible spring contact between them.
> 
> The MITA website indicates the following on service
> manuals and parts for Wurlitzer (who have been out of
> business for some time:
> Morelock's Organ Parts (Parts and Service for all US
> built Wurlitzer Organs and Electronic Pianos)
> Mark Morelock
> 37-A Main Street
> Rienzi, MS 38865
> 662-462-7611 - Phone
> 662-462-7611 - Fax
> morelocksorgan@ <mailto:morelocksorgan%40frontiernet.net> 
frontiernet.net 
> Wurlitzer Service Manuals Website:
> www.MitaTechs.com/morelock1.html 
> 
> When I was in the trade, I dealt with Mark and his
> wife, very nice people. I don't know how much of the
> stuff is still available.
> 
> Jim Cason
> Promised LAN Computing, Inc.
> former organ/keyboard/amp technician.
> 
> 
> 
> 
> _____ 
> 
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