Continental 2 Magazine Scan Slows/Shakes same place

[rudy18d]

Greetings,

Just spent a good bit of time reading the numerous threads on slow scanning and magazine issues, even a 12 tab exchange. None covered partial slowness or stuttering/shaking. Hopefully this one will not take much of everyone's time.

Nutshell, magazine slows, stutters, and shakes every revolution starting at (gripper arm as starting and ending point) G5 thru K14. After it clears K14 speeds right up and spins normal and strong. DC voltage under load of scan just drops to 26.8vdc, even during the stuttering and shaking. I am getting 28 VDC at the junction box with no load. All caps have been replaced in the last 2 years throughout the jukebox. Cleaned and serviced the record magazine motor around that same time frame. Did sit for a year while I was deployed.  Jukebox is clean but can see some light surface rust on black shaft inside magazine. My jukebox is currently located in my unheated garage until I get it functional again and it has been colder than usual here in Houston. I know for most of you -1 to 4.4 C is barely sweater weather, here that is cold! :-) The only reason I mention it as a potential variable is because I have a Rockola 1448 that is very temperature sensitive.

Any ideas on possible culprit? I am leaning toward it being some kind of buildup on shaft internally/externally maybe from when it sat for a year? Or else something is bent out of round/adjustment at just that particular area between G5 and K14. The only move it has had since fully functional and working is over thresholds to other rooms/garage.

Appreciate any suggestions.

Rudy

[jukenorman]

You probably need to remove the magazine motor. Then you can check whether there's a tight spot on the carousel itself or whether it's the motor that's a bit close to the carousel at the point where the bind occurs.

Norman.

[Deadhead Japan]

Rudy,

I had a similar problem with my Conti 2. Did you change the cap under the scan switch control box? I changed the cap for a different problem, but when I did the problem went away... It is not listed on the schematic. Someone on FB had mentioned for me to check to see if it had been replaced. Additionally, there is supposedly a cap under the scan box where the gripper motor plugs in that is not listed as well. My restoration is almost complete, but I need to pull the mechanism one more time for something else and when I do, I am going to check to see if that cap is there.

Neal

[rudy18d]

neal - Hi Neal,

Yes, in the control box I put a new 100 MFD Cap in and a new 100 ohm resistor per the diagram in the Continental 2 Service Manual section titled "Record Changer Control Box Wiring Schematic and Mating Plug Pin Identification" courtesy of Bob Maddamma of Medina, Ohio. It was very helpful although it did not mark the polarity of the electrolytic capacitor. I assumed the bottom of the cap in the drawing was negative and attached to the very center pole of the mechanism switch that then connected to pin number 2 on the 6 pin connector.

I did also go thru the "scan box" and put in new components and cleaned points.

Update: Fixed the issue. The magazine belt was a little too loose and turns out the belt that travels horizontally along the bottom of the magazine was hitting and dragging a wire loop and bundle of wires on bottom right of magazine hidden by the small wheel. It was located just inside the bottom wheel of the of the belt drive. Tightened belt, move wires outside path of belt, all works fine now.

@norm - Thanks Norm. I am glad I didn't have to go to your suggestions, means I would have had to pull the playmeter assembly AGAIN to get to the motor. Not super difficult, but very time consuming for me.

Thanks for everyone's help.
Rudy

[gazzy58]

Hi Rudy, just picking up on your post. One thing I would suggest, if you have not already done so, is to put a couple of drops of sewing machine oil or similar on the metal shafts/spindles that run through the plastic rollers which turn the belt and also make sure the rollers are clean. Obviously keep any oil away from the belt and rollers themselves. With lack of lubrication, these can become a bit stiff, possibly slowing the motor down a bit and putting unnecessary strain on it. I agree with you, temperature will affect the running speed of the carousel. I keep a small greenhouse heater on low heat throughout the winter in the room my jukeboxes are kept. Gary