Problem with SEEBURG 100B....one mistery !

Hi,
I'm new in this great and useful forum, i need some help for one (or more ?) problem in my juke..

I have a Seeburg 100B of the 50's and when the machine is plugged in it start scan and will not stop scanning back and forth.
No selections are made but the mechanism scanning back and forth however...

But when i insert a coin and make one selection the juke stop the scan, clamp the record, play the record and when the record is ended go into magazine and the mechanism return to scan back and forth and replay the same record.

I have see that the play control relay (in the WSR) is always active...

What are the cause of this trouble ?
I'm becoming crazy !
I'm reading the handbook from two days to find a solution !

Thanks for all tips and helps !

Soon
Matteo

Hi,

I don't know if this helps (as I have never seen behind a Seeburb 100B), however, I had a similar problem with my AMI model K.

On the back of the record drum are a lot of small pins that push out when a record is selected. These pins tell the arm where to stop at the selected record.

I found that a few of them were remaining (just a little) bit out and the jukebox continued to scan. As the arm selects a record, it pushes the pin back in. With time the pins had become a little tight. I pushed everyone of the pins in manually and it stopped scanning.

For a permanent fix I provided some very light oil to every pin and worked them in and out a few times. I needed to use a pair of pliers. The problem was solved and never returned.

Good luck.

Gordo (from Australia)

Hi Matteo,

I have not worked on that model.
Have you checked out the contacts on the reversing switch?

Regards
ami-man
UK

Hi,
Thanks for the tips,
I have checked all the contacts and the reversing switch...the contacts are ok and the switch work good.
I have disconnect the plug of the "pin bank" but the mechanism scan again back and forth...

Now i have see that the service switches do not have effect...
The strange thing is that when a record is selected, the record comes played normally.

Thanks for helps

Matteo

As was posted by Gordo, either one, or more, of the pins on he Solenoid Assembly (SA) is not fully in, nor out, or you have an internal short in the SA. There also is a chance the short is in the wiring for the play control relay, or the relay itself is magnatized--does the relay release when the phono is un-pluged? Are the contacts open at that time ? If the former is the problem, I would assume that the "pin dresser" on the contact block is also not operating correctly, which MAY be due to the phono being transported on it's back, without proper shipping proceedures being followed. The problem also can be that cam switch "D" is mis-adjusted, or the spring that pulls the cam switch actuating lever, is missing or broken. Ron Rich

Hi,
I do not succeed to resolve the problem...
I have tried to remove all the connectors from WSR (electrical selector, service switches, pin bank etc etc)..but when the juke is plugged in it the carriage start to scan and will not stop scanning back and forth...and the play control relay are not active...all the coils are not active...

How it is possible ?

I do not succeed to understand what can be...al connectors unplugged from the wsr (excluded that one of the carriage, obviously )...the play control relay not active...but the carriage it continues to scan...

Someone knows the solution of the mystery ?
I suppose a hidden short-circuit...but where ?

Thanks so much
Matteo

Are the contacts on the play control relay open, or are they making contact ? Ron Rich

Hi,
Not making contact, the play control relay is not energized....when energized making contact....
In my first post i have said "the play control relay is always energized" but i have checked and in some cases the play control relay is not energized but the carriage scan however...

Thanks
Matteo

Matteo,
Is this machine connected to 117 vac with a TWO wire power cord ? If so, "the hot side" of the power comes from the wall to the on/off switch on the rear door, then to the "play control relay", where those contacts should be open to stop it from going on to the reversing switch/ and the motor. The "neutral" is connected directly to the R switch/motor. Do you have a meter? If so, measure the resistance at the solder joints of the contacts of the relay with the POWER OFF ! It should be "open".
NOTE--if the power cord is THREE wire, and the third wire is connected to the chassis, remove the third wire, and check that the other two wires are correctly installed !! Ron Rich

I seem to remember one model that kept scanning if you had credit left, until you made enough selections to use up the credit.

Sorry--it's not this model--Ron Rich

Hi,

Finally i have find the trouble....a wire soldered (i suppose in the '70) in the wrong way...when i have removed the bad wire the mech works fine...and stop when no selections are make...

Thanks for all !!
Soon
Matteo