Bandshell UCS2 235VAC model with voltage problems

[cenobyte]

Hi there!

I'm repairing my first ever jukebox so I need some help figuring stuff out please 

I have a European Bandshell UCS2 (so 235VAC) and I'm having too high a voltage in my DCC box. The machine was blowing up fuses to the mech/motor and I found out why: the motor should be getting two lines of 117VAC from the DCC but one of these lines was 0VAC. When I unplugged the DCC box and put the plug back in with the pins switched, I measured 117VAC on one wire and 235VAC on the other! No wonder the fuse to the motor got fried...

The DCC box has a red 235VAC transformer that's getting 235VAC from the power cord and that should be correct in a European model, I guess the transformer should convert that to two lines of 117VAC? 

BUT:
I did find a very strange thing: one of the wires that should be 117VAC is directly connected to the same point as where the 235VAC wire is connected to. That can't be right, is it?

So do I need a new transformer or is something else wrong here?

[jukenorman]

Hi Mario,
Do you have a diagram showing how the UCS2 European 235V models are wired on the AC input?

Norman.

[Ron Rich]

Hi Mario,
Please read and answer the questions in our FAQ's section-Hi Newbies post, so we can help you-- meanwhile--do not power up that phonograph ! Ron Rich

[cenobyte]

Hi guys! Thanks for the replies there. Turns out I was measuring things not quite the way they were meant to be measured...

I did not have 235V model schematics (I do have original schematics though) and it turned out that the fuse that was blowing all the time was not in any schematic, it was added by a previous owner who had something else blowing up I guess and tried to solve that by adding a fuse.

So I started by reading the complete manual and service manual and trying to understand the schematics that came with it. I'm a newbie to jukeboxes but I do understand electronics a bit, so it all made some sense. I also had a lot of help from a guy that was instantly replying to my questions on a Seeburg Facebook group and he put me on the right path.

The fuse was being blown out by the reversing switch. Having the mech pulled out of the box and playing next to the box showed me the sparks when the carriage returned at the end of the track. It turned out that this switch was bent, so in some occasions all three leaves of the switch connected and shorted out the fuse. I set the switch leaves straight, cleaned the contacts and the box is playing perfectly ever since!

[jukenorman]

Hi Mario,
Glad you got it resolved. I was a bit concerned that you might have had the live and neutral AC supply wires crossed, looking at the AC voltage readings you gave us in your first post.

Norman.

[Ron Rich]

Hi Norman & All,
During the last daze of Seeburg's existence, the "cost cutting guy's" attempted to reduce the inventory of the parts division, as well as the production division. It was decided at that time, to eliminate all but the "H 5/6" type, transformers. from both divisions. Starting with the DCC-4's they began using a H ( "H"igh voltage -240vac ) "5/6" (50 -60 Hertz), transformer for all domestic & export models, which they designated as a "DCC-42". On domestic units, they just used one half of the primary winding to get the 117 vac needed-- On 240 volt apps, they used 1/2 of the primary and the CT to get to the 117 vac. After that, ordering a replacement transformer by any of the older part numbers would result in a sub of the newer style transformer. Ron Rich