Seeburg m100c No Selection

I recieved the Juke about 2 weeks ago. Before plugging it it I went through the Service Manual and replaced all the caps in the reciever and amp. Took the Mech apart cleaned/oiled that up. I also went ahead and adjusted/cleaned all contacts.
Last night I went ahead and powered it up. When I enter a selection the buttons hold down and the solenoid on top of the credit and cancel units stays on and does not release until I power down--no selection is made.
I went ahead and manually selected the selection coils on the back of the machine and wallah the machine works beautifully.
What is causing the communication problem between the electrical selector and the selector assembly?

Note: I went through the basic troubleshooting chart.
This machine does not have a coin mech I am using a box from victory glass for freeplay

I was planning on having it ready for my christmas party---not looking good
Bob

Hi Bob,
Look at the relay in the CCU--determine if it is being energized--If so, NO contacts on it are bad---if not, it NC contact is bad, or it's not getting power (`17V DC minimum), or -it's open, or the cap is shorted (very rare). Could also be a "sticking" coil/rotary switch in the CCU(Be sure the fuse in the "open holder", on the WSR, is not larger then 1.6--no matter what size is listed !!)

Went ahead and tested the relay and found 13.2 volts on both sides of the cap. Looks like we are on to something.
BOB

The selenium rectifier is bad. There should not be anything less than 25VDC as the Low-DC. Replace with a silicon bridge (or 4 diodes) of at least 4 amp capacity and add add ½ amp/slow fuses to each AC leg of the new rect. The voltage will now be approx 30VDC or slightly more, but that is no problem.

---Remember that this is a positive-ground circuit.

Rob/NYC

Thanks Rob I will have to try that. Further inspection tonight proved that the credit and cancel switch had a switch down at the bottom wheel. The contact of that switch released the solenoid and applied the relay. Letter/number selections are proving to be too fast with no delay with still no selection/coil. Forgot to mention that I have 28.2 volts at the slowblow, which is now a 1amp fuse instead of the 2amp i had in there

You can not go by the no-load voltage in these sorts of failures. A selenium rect fails by developing high internal resistance. Under load it breaks down.

The only way to really determine the state of it is to attach a meter to the output of the rect and do something (make selection) to place it under load. Typically, the timing relay in the credit unit will buzz and not be able to pull-in. If that happens the output of the rect will drop to approx half it's no-load reading.

Rob

Bob,
I think you are getting the voltages confused--the fuse has AC, while the relay/rectifier is DC --both "nominal 25".
Did you change the .05(.047) cap on the relay ( use extreme caution here, minimum heat--as the wires "snap off" the relay, real easily !) ? Did you change the 25x50 lytic ? Either, or both being "bad" can cause this problem. Ron Rich

I was using ac to test it--thanks for clearing that up. I did change the cap on the timing relay. Where is the 25x50 lyric?
Happy days Rob

At position "C-1"--
Ron Rich

yes i put a new 25@50 at the c1

Just tested the timing relay with my multimeter on dc voltage and it was reading 28.5 volts

Have you had someone "make a selection", while you were watching the timing relay ?? If so, is it energizing or not ?
Ron Rich

I ended up washing the selection assembly and switching out the slow blow for a 1.5..i ended up having my wife make a selection to get a good reading for ron and guess what it worked -I want to thank you guys for helping me
Merry christmas
Bob

Bob
Glad you "got it"--but what, did you "wash", and how ?
Ron Rich

I washed the electrical selector with some mild soap (dawn) and soaked in hot water for 1 hour. I then used a hairdryer and sprayed all the contacts clean with plastic safe electrical cleaner. Happy Holidays