Wurlitzer 2104 plays one record then blows the pinbank fuse

Hello, my name is Stuart and I live in Aberdeenshire, Scotland.
I just found your forum and it makes very interesting reading.

I have owned my Wurlitzer 2104 for fourteen years and never had any problems with it until now.

It plays one record then blows the fuse in the pinbank (the carousel where the pins pop up). It doesn’t matter what record is played, it blows the fuse while the record is playing. If I pop up a pin manually it plays fine. I have tested all the coils and they seem fine, all have 6.6 ohms resistance. Is there some solenoid that is held on while a record is playing? I guess I need a manual. Is there somewhere I can download a manual or do I need to buy one on eBay?
Any advice will be gratefully received.

Stuart