Hello,

I am trying to repair a wurlitzer 2000 jukebox, and am looking for some advice.

Normally, song selections are made via the keyboard with letters and numbers,
and a number lof solenoid latches and switches direct the signal towards the junction box, coin grinder and eventually a latch should pop out in the selector drum, the big "clock'. Once a latch pops out, the wobble ring is displaced, a switch closes and the hands of the clock move towards the popped out latch and a song starts playing.

That's how it normally goes.
However, since a couple of days the latches stopped popping out.
After thorough inspection of all the latches, fuses and solenoids, it would appear to be a twin set of resistors that are the culprits.

One is a 175 ohms ww (wire wound) 5 watt, which only leads to lighting up a ligt bulb (the select light bulb)
The other is a 150 ohms ww (wire wound) 5 watts, which is to limit the current to the latch solenoid after it pulls in.

A veteran repair man pointed out this morning this is likely the case, since we also noticed a puff of smoke coming off of it last week.
He measured it through, however not "out of circuit". In any case, The 150 ohm read 50ohm, the 175 only 0.3 ohm.

I'd like to ask if anybody knows which replacements I should buy, since it seems the 175 ohms resistor is non existent anymore...

 

Disconnect one leg of the resistor and measure the resistance across the resistor to tell if it is bad.

You can buy 150Ω 5W resistors.
You can also buy a 22Ω resistor and put it in series with the 150Ω 5W resistor.
The 22Ω resistor does not have to be 5W.
1W or higher will do.

https://fr.farnell.com/rcd-resistor...d-resistor-150-ohm-5w/dp/1614359?st=resistors

 

Hello,

Looking at the schematic, there is a contact from one of the latches over the 175 Ohm resistor (contacts 3 and 4).
The 0.3 Ohms could well be the closed contact resistance.

Bertus

 

(as said) You need to remove one end of the resistors to test it on ohms, you can't check it correctly in circuit.

 

took a little while to get there, but the resistors have been tested and they both are good and within tolerance. so no luck on finding the culprit.

 

Before going any further, make sure any leaf switches are clean and adjusted. There could be pitted contacts or leaves that are not holding because of dirty contacts. Take a business card and clean all of them. DON'T use a file, if you must, you can use contact cleaner, but not a good idea. Also check for cracked solder joints near any solenoids, not usual to have units that might look good, but have small cracks that prevent good contacts. Do the same on the fuse holders.