So I just picked up a Wurlitzer 4572 as a practice instrument. It's pretty solid, except for the organ pipe stops. For some reason, several of them have particular sets of keys that aren't playing, as shown in the video. Any idea where to look for a problem/what caps to replace? I have no problem rebuilding electronics, but these PCBs aren't labeled and I don't have a manual.
Very much appreciate any help you can provide!
Appears to be a flute filter issue. Might be a broken connection. The 4573 had flute filters on small vertically mounted circuit boards on the tremolo board. They were RLC networks with no active components. I don't know about the 4572.
td
Thanks for the message! Interesting- do you have access to a service manual? I tried looking up the company referenced in old posts on this site, but they don't seem to be in existence anymore, and I don't know where else to find resources for troubleshooting. Even a diagram showing which boards are where would be great- then I could at least focus on one area to start checking connections.
Contact Morelock Music in Rienzi, Mississippi. They have all the parts for Wurlitzter organs. They also have the service manuals. They are very much still in existence. They helped me out with my 950 organ
Appears to be a flute filter issue. Might be a broken connection. The 4573 had flute filters on small vertically mounted circuit boards on the tremolo board. They were RLC networks with no active components. I don't know about the 4572.
td
The 4572 is similar to the 4570, but the 4572 does not have Slide, Multi-Matic Percussion, or Swingin' Rhythm. The 4572 has a roll top with lock.
I believe the console 4570, 4573, and 4572 all have an add-on percussion circuit board for the lowest 5 notes mounted below the 56 note percussion circuit board. Could the problem be related to that add-on board?
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