Hi Nigel, I removed the "R" control relay and bracket. The contacts were in good shape with decent follow. I cleaned them up and checked the two sand resistors and they both tested within an ohm of their rated value. I cleaned the male lugs for the Jones plug and also inspected and reseated the nylon Molex plug (exercised it a bit first). If I push the two contacts together (left two contacts) on the "R" control relay with a pencil, the mechanism gripper grabs the record, places it on the turntable and then plays the record. At leadout, the record is placed back in the carousel. If I turn the cam slightly clockwise, the mechanism will do the same. The "R" relay is operating and releasing correctly. With the machine in play mode, pressing on the stop switch does not start the transfer motor. Those contacts tested okay on that mirco-switch when I metered it yesterday. I'm going to look at the sequence schematic on pg. 48 of the service manual and see if I can figure out what potentials I should have and where it's not passing through to the transfer motor. It may sill be that magazine detent switch NC contacts that were noisy when I tested them yesterday. If I understand correctly, current should pass through those contacts when the carousel is turning. I'm learning a lot more about this machine than I used to know so I guess there is a silver lining. Dean
On Wednesday, March 13, 2024 at 01:58:08 PM PDT, Dean Carriveau d.carriveau@att.net wrote:
Hi Tony, I used a Simpson 260 analog ohm meter and a digital meter on the magazine detent switch with wires off Both showed intermittent noisy contact on the normally closed contacts. The normally open contacts tested with a sold contact at near zero ohms. I've ordered that switch. Dean
On Wednesday, March 13, 2024 at 03:48:33 AM PDT, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Did you remove the common wires from the switch to test it?
Did you use a beeping continuity tester or an ohm meter to test it?
Tony
On 3/12/2024 6:03 PM, Dean Carriveau via Jukebox-list wrote:
Nigel, Thank you so much for the directions on the search unit disassembly. It went very well. I checked both switches on the stopping switch assembly and they both tested solidly good. I also checked continuity between the switch terminals and lands on the disk and the reset coils and disk lands. All tested okay. Just to be sure, I re-soldered the wire connections from those units to the disk and then cleaned the disk lands thoroughly. The magazine detent switch gave an intermittent flakey ohm reading on the NC terminals. Moving the NC terminal around caused an intermittent open. I cleaned it up and reinstalled and the stop pin still skips over a selected pin without starting the transfer motor. I've ordered a new switch and will install it when it arrives in the next ten days and I hope this clears up the issue. Thanks again, Nigel, your directions were very clear and gave me the confidence to tackle that part of the machine I'd never had apart before. I'll let you know what happens next when I receive the new micro-switch. Dean
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