Vintage Synth Repair

OK
First thing, I would order a complete service manual from Morelock's Organ
Service in Rienzi, Miss. I don't like the fact that the ground is cut off
the plug. That could possibly induce some hum. The pick=up bar is the long
metal plate that surrounds the reeds. The preamp board is a small board
mounted on the top middle of the pick-up bar. Remove the long metal shield
and you should see it. With your description, it sounds like you have some
debris that lodged between a reed and the pick-up bar, essentially shorting
it out. Take a vacuum and carefully vacuum around all the reeds. Do NOT use
compressed air. Carefully lift a group of dampers and vacuum and inspect the
reeds and clearance. Take a business card and run it along both sides of all
the reeds for clearance. Make sure the piano is unplugged when you do all
this. Then recheck the piano and let me know what happens. Do you know what
notes make the loud snapping sound. That may give you a clue which reeds are
touching the pick-up bar. 

Keith

-----Original Message-----
From: troy kimura [mailto:so_ber@...] 
Sent: Sunday, June 08, 2003 12:21 AM
To: vintagesynthrepair@yahoogroups.com
Subject: RE: [vintagesynthrepair] a new member...


Hi Keith, i checked the headphone and aux jacks,
neither work now, though when the speakers worked, the
aux did too.  the extension cord had three wires, but
the ground was cut off of the plug itself.  also, when
i turn up the volume, the static increases, and vice
versa.  when i bang on the keys sometimes i get a
crackle or pop that sounds like its trying to play but
doesn't produce anything really....also i can hear the
vibrato breathing louder as i turn up the volume, and
i can hear the adjustment of the vibrato as well.  i
don't have a manual so im not familiar with the names
of the parts yet....where is the reed pick up bar and 
the preamp?  when it comes to electrical im in the
dark, but im trying to learn!  thanks alot for your
help though!  

troy


--- Keith Niver <kaniver@...> wrote:
> Troy
> It could be something simple. The 200a used a lot of
> push on connectors from
> cables to the amp board. It's possible le one of
> them is loose, or it may be
> electrical. Do you get anything trough the headphone
> jack? Or aux jack?
> Sorry your friend wired in an extension cord. Was it
> a three wire? Those
> cables are generally available from a variety of
> sources. If it was staticy,
> something may have shorted out in the amp. Was the
> static noise adjustable
> with the volume control or vibrato? Check the input
> cable from the small
> preamp board up on the reed pick-up bar. May also be
> a dc power supply
> problem. Do you by any chance have a service manual
> for it?
> 
> Also, there is a yahoo group specifically devoted to Wurlitzer 
> electric pianos and an archive list that may be of help to
> you in the future. Hope
> this gives you a start. 
> 
> I have parts, reeds, and other stuff if you get into
> a jam.
> 
> Keith Niver
> Master Certified Wurlitzer Tech
> 
> -----Original Message-----
> From: troy kimura [mailto:so_ber@...]
> Sent: Saturday, June 07, 2003 2:18 PM
> To: vintagesynthrepair@yahoogroups.com
> Subject: [vintagesynthrepair] a new member...
> 
> 
> hi, i just joined this group because i just came
> across a wurlitzer 200a.  i got it home and the
> original cable didn't
> come with it so my friend removed the original oval
> three prong connector and wired an extension cord to
> it.  i turned it on and it worked, the keys worked
> and
> the vibrato did too, it was a little static-y but
> not
> bad.  then it was left on for a little while, i came
> back to it and the keys wouldn't make any sound.
> the
> speakers still work and i can hear the vibrato
> pumping
> and the volume sizzle softens as i lower the level,
> but the keys still aren't amplified.  i thought
> maybe
> it was a problem with the power cable so i connected
> a
> iec connector to it but it's still the same.  does
> anyone have any idea what this could be?  please let
> me know what i should do if you get the chance. 
> thanks!
> 
> troy
> 
> 


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