Rowe Ami JB 200 Selection problem

Hi I am new to your site and I must say impressed with the depth of knowledge you guys have. I have a 1964 JBM 200 Tropicana that I have owned for about 10 years. It has worked exceptionaly well untill recently I had to put it in storage at my sons house (inside and covered)for 12 months. Since re instating it it has developed a problem when selecting records, for some reason it initialy stops at the right selection and then advances to the next record. Ocassionaly it will stop and not advance so you get the right record sellected. Any advice very welcome. Also some records sound slow but this could just be the record needs cleaning. Ian Sampson Perth Western Australia

Ian, try disconnecting the toggle shifter (A-B side) coil and see if this still happens. Unplug both spade lugs.

This problem drove a whole shop of guys down on New York's tenth ave (the coin-op district) nuts for a week 'till I dropped by on my way to work. I noticed that this occurred at the exact moment when the toggle shifter would actuate. It had and intermittent short to-ground that caused the basket motor relay to fallout for a fraction of a second causing it to hop one slot over.

If the 33-45 shifter coil is still connected try disconnecting that if the first test fails.

Rob/NYC

Hello Rob thank you for your quick reply I am not sure what you mean by the toggle shifter (A-B side) coil, The 33-45 coil is disconnected, what I have notice is that on every selection the ferris wheel does stop every time at the right place but something causes the solenoid to reactivate making the ferris wheel advance exactly one record. This happens on just about on every selectionvery occasionaly it does stay on the right selection (maybe one in 20-30 plays). I do not have a manual but have just ordred one. Regards Ian

Ian, the toggle shifter is the one at the right of the gripper trunion assembly that shifts the gripper to either play an A or B side.

Rob

Thanks Rob I tried with the two wires disconected and still hops up one record. It is a definate a stop and go process when the solenoid operates, it definately stops on the right selection every time but something is re energising the solenoid and micro switch only long enough to advance one record. When I first switched it on today it played the first five selections perfectly and then started hoping one record on every selection, when I disconnected the two wires it did exactly the same. Could it be dirty contacts in the selection control unit although I suppose if it was I would it would do it all the time and not intermitantly select the right record. Something is re triggering the solenoid circuit at the exact moment it stops. If I stop the ferris wheel manualy the first time the solenoid disengages it obviously plays the right record. I guess it is letting me know it wasn't happy being packed away for twelve months.
Regards Ian

Well, the next suspect is the stopping/canceling assembly and the micros there. What may be happening is that either one of the micros is faulty or not being engaged adequately and the added force from the magazine moving one more space finally sets it.

One test is to determine if this only happens when either and A or B side is selected. It may also be a case of poor contact on the rings of the stopping assembly though most of the probs on these machines are caused from aged miroswitches.

Rob

Guy's,
The most common cause of this type of problem is a contact somewhere "in the chain" that is "bouncing". It can be ANY contact, on a relay, an open blade type switch, or a "Micro-Switch" (brand) type switch. There are two ways, I know of to test this. 1. Using a GOOD "analog" (not digital) meter on the lowest resistance range, slooooowly actuate the switch while watching the meter. If it "makes", and then "flickers", the switch is "bad". 2. Do the same with a 60-100 watt incandescent lamp wired in series with the switch--filament should not "flicker"-- Watch it "make", AND, "break"-- Open blades can be cleaned, and should be free of burns/pits--closed switches usually require replacement--bu there a few that can be carefully opened and cleaned--No "residual sprays" should be used. Ron Rich

See the following post for a successful solution to this problem.

Rowe Model JAN 200 Diplomat (1965) skips past selection.
12by drodeman00 » Tue Sep 13, 2011 3:39 am

Don

Thanks guys you have certaily given me food for thought, I will get the old Avo meter out on the weekend and let you know how I go. Regards Ian