by Rob-NYC »
Wed Jun 24, 2015 3:22 am
Well, "Backward"

I had that same model from summer 1988 till I sold it in early 1992.
Take a look at this page:
http://www.jukebox-world.de/Forum/Archi ... I_K200.htmIt is for a K but the "electrical" type is the same as yours. Scroll way down and you will see the pulse convertor keyboard. On it there is a set of wiper blades, the ones you ordered that slide over a circular set of contacts as it turns. These create a series of pulses corresponding to the letter and number selected and are translated in the Search Unit on the front of the mechanism.
If the blades have been replaced it is possible that they were not formed to exert just enough pressure on the wafer contacts. A simple test is to tale a thin piece of paper and attempt to slid it under each blade. if the pressure is adequate it will be difficult or impossible to get it to slide easily.
Also, the copper contacts on the wafer do get dull over time and if the new blades are not traveling in exactly the same position it is possible that they are now touching an area with poorer-dirtier contact faces.
The Search Unit has a series of relays and two stepper wheels. Problems in this area require a degree of skill and it is possible that parts here have worn and require replacement.
All this aside for a moment, that machine is now 56 years old and if the amplifiers have not been rebuilt it is inadvisable to continue using it. It can easily destroy itself if a capacitor shorts and overloads the power supply.
If you want to continue owning and using it, a service manual is a good idea -both for you and whoever you hire to do work on it. The men who actually operated and worked on these machines are now few and far between.
Here is one place to get a manual:
http://www.alwaysjukin.com/items/servic ... s/list.htm The place you bought the wiper blade from may be another.
While the selection system was needlessly complicated, the mechanism was very good and cabinet construction of those pre-Rowe models was the best in the industry. Grand Rapids MI was a center of quality furniture builders and AMI used a well-known company for their juke cabinets (I can't remember the name). AMI was also the only juke box company to produce machine with an acoustically isolated speaker cabinet -all other makers housed the speaker in a common area with the electronics and sometimes also with the mechanism.
The tonearms need some modification to be easier on the records, but beyond that, AMI was a high quality builder.
Rob-NYC
"If we believe absurdities, we shall commit atrocities" -- Voltaire