wurlitzer model 3100

A number 2 Phillips will work as an alignment tool on all models, except 31/32/3300's as there is not enough room between the floor and the ES, to shove it up/in-- The Wurlitzer tool is about 4 inches long (guessing here--don't have one to check at the moment), with three inches going inside, an on inch stopped by the clip-so, you will need to cut a screwdriver to fit- Ron Rich

ok, let me see if i understand. the electronic selector, which you are calling the memory, is what needs to be centered. i am talking about the whole unit. if this is correct, then i think you are saying that a tool needs to be inserted into the bottom of the shaft in the center on the ES and that the two screws on the rear at the triangle piece and the two screws one on each of the mounts at 45 degrees at the front are the screws used.

if this is all correct can the unit be out of alignement and still give bad selection to just one side, ie odd or even selections?

i see not tool so it must be gone. can a allen wrench be used?

Your "understanding" is correct--
If you have an Allen wrench the exact same thickness as a # 2 Phillips screwdriver, and it's not too long, it should work ?
As far as I'm concerned, I can not see your one sided problem being THAT "alignment" ?
Ron Rich

ok ron,

you still think i need to adjust the backstop on the side that is giving the wrong selections.

also can you explain something to me. the backstop is suppose to stop the motor from reversing. that i understand. why it would reverse is what i do not understand.

i went back and did some more troubleshooting and i must have missed this but looking from the front the right arm is the only one that is lifting and i looked and it is stopping one slot before the correct position on the left arm side. this might give you other ideas on my problem.

No Sir--the back stop does not keep the motor from reversing--it has no bearing upon any motor.
The motor begins reversing when the crank arm hits a released pin, and triggers the switch connected to it. The back stop prevents the carrousel (aka "basket") from being turned backwards.
What you have written indicates to me that the LH back stop is not functioning (at all, or maybe correctly ?). Have you watched / listened to it ? Compare it with the other one-- Ron Rich

lh from the back of the box?

by not working you mean that the stop is not moving against the carrousel correctly?

rm5211 wrote:ok ron,
also can you explain something to me. the backstop is suppose to stop the motor from reversing. that i understand. why it would reverse is what i do not understand.

This is incorrect.

Let's go through what happens when the crank encounters a raised pin;

1) Crank hits pin and instantly triggers a switch on the crank assembly that activates a relay that instantly reverses the carousel motor.

2) When the carousel motor reverses the backstop pawl nearest the selected record slot, either A or B side, stops the carousel from reversing. The main shaft continues in reverse rotation and a slip clutch holds the carousel against the backstop pawl while the lift arm enters the record slot.

0Note: At the instant the carousel reverses a ratchet clutch has engaged the center shaft and main cam to begin record handling. this phase has nothing to do with the backstops.


For a quick check of the backstop pawl alignment:

The idea is to allow the record lift arms to center the carousel during this procedure and adjust the pawl to hold at that position.

1) With power off, manually bring the carousel to a desired record slot. While holding the carousel at that point pull the pawl away so that the carousel is not held by it.
Turn the motor shaft by hand in the direction that starts raising the lift arm into the record slot. Stop as the lift arm has entered the slot and release the pawl. Ideally, it should be just inside the tooth on the carousel gear at that record slot. If not, --slightly-- loosen that backstop's two screws and carefully reposition it to the proper position.

It should not be necessary to shift the backstop more than a small fraction of an inch.

The pawl should be just behind the tooth and not too deep into the tooth recess.

Check on several slots around the carousel.

Rob

Been a year and i now have started to look at my problem again. The memory casing seems to be aligned as far as i can tell. once again here is my problem. the odd selections are not playing, the unit stops one slot before and it plays the record from the opposite side. the even selections are played correctly. i have been told that the back stop and selection of record are on the same side. does anyone think that if i am correct that the memory casing is aligned that the backstop paw could be my problem?

Upon re-reading the last few posts, I have re-called one other "fact" that has not been mentioned---
There are two "crank arms", used to search for raised selector pins--ONE, has the "sensor" welded to it. The other has the sensor screwed to it, and is "adjustable" ( factory adjusted--NEVER SHOULD need to be re-adjusted !!). IF, some "Geppetto" has "adjusted it", I can visualize the problem you're having---My advice to you would be to determine which arm has the welded sensor, (as I do not recall) and observe the operation of both sensors, to determine if moving the adjustable one will solve your problem. Ron Rich

ron,

if i understand, you are talking about the selector crank that rotates to the pin that is up. each end of the of the selector crank has a bracket on it that hits the pin. both of mine are screwed in, no welds and they are not slotted just holes to mount.

Yes--it sounds as if we are talking about the same things--Interesting, as I never spotted that change--guess I never had a problem with the "newer" models--yet
Don't know what to say, other then see the Service Manual and check the back-stop adjustments, as shown, or use Rob's suggestions above ?? Ron Rich

ok, took back stop paw off and cleaned. it was stuck. remounted using the alignment of rotating drive to push the record up from a1. still plays record from the opposite side. since the backstop has slots i even tried it in another position and the same thing, played from opposite side. when the correct slot (a1) is at the correct location to push the record up, the backstop is aligned on the claw the is aligned with t9/0 slot on the record indicator ring.

Either your backstop adjustments are wrong, ( they area b---h, to get correct !) or it's also possible one, or more of Rob's Gepetto friends has "messed with" the stopping switch, actuating screw ??
Try the following--put a record up on either side, take a photo of BOTH back-stops. Then put a record up on the other side. Compare the position of the backstops in the photo, to what you now see stopping the basket from turning in reverse, the non-stopping side pawl should be well advanced up the "ramp"--this should happen on opposite sides for opposite side play. Even side record mounted side should show the pawl stopping the basket wit one pawl. Odd side mounted should show the other side stopping the basket.
If that's OK--try adjusting the above mentioned screw ?? Ron Rich

Ron,

i went back and checked the backstop and aligned it again. before adjusting anything else i decided to run through all of the selections to see what played. i got all the way to c5 when smoke came from the junction box. looks like a cap went bad. on the motor jack. the cap is a
220uf which is not original. the manual says it is suppose to be a 12.4uf. so i will get another cap and replace it to see what happens. in the mean time here is some info that might give you other ideas on why the selection and play are different. a1-a7 play L records, a9 plays m2 and a0 plays L9. b1 is b1 b2 is m1 b3 is m6 b4 is b4 b5 is m8 b6 is m5 b7 is m0 b8 is b8 b9 is n2 b0 is b0. c1 is n4 then c2-5 play c2-5. i guess i needed to do this to begin with since it looks like some selections on both sides work and others do not. i might just be better off going back to my other unit and trying to find the problem with the keys not locking once credits are in. if you have any thoughts please let me know. thanks

IF--it plays the same selection as the pin released indicates on the Electrical Selector, the backstop ( OK--"claws") pawls are working as they should ( In other words, Pin numbered "A-1" released, phono plays record A-1, side A-1). If it's releasing pins other then what correspond to the keys pressed on the keyboard, MOST LIKELY, the "four plugs" are installed incorrectly (TWO SETs of four--one set from the keyboard to the Jbox, other from the jbox to ES).
As for the cap, are you sure you are reading the manual correctly--12.4 and 220 uf are sure a long way apart, IMHO. Ron Rich