(Topic ID: 135701)

LW3 Data East coil question.

By joekiss

8 years ago

Topic Heartbeat

Topic Stats

  • 13 posts
  • 3 Pinsiders participating
  • Latest reply 8 years ago by terryb
  • Topic is favorited by 1 Pinsider


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#1 8 years ago

The left saucer coil isnt working. The switch works fine the coil wont fire even in test mode. Everything else on the game works all connections look good. Where should i begin? Thanks

#2 8 years ago

Check the Q43 transistor on the CPU board. It is likely bad.

#3 8 years ago

Will do

#4 8 years ago

Transistor looks good. Did a voltage check. The double wire has current the single wire has nothing. ALL of the other oils have constant current from both lines. What now?

#5 8 years ago
Quoted from joekiss:

Transistor looks good. Did a voltage check. The double wire has current the single wire has nothing. ALL of the other oils have constant current from both lines. What now?

You kind of lost me there. If you're testing voltage then the reading would be volts rather than current. Also if I'm understanding correctly nothing you did would actually test the transistor.

Did you take a voltage reading on each winding of the coil and the coil lug with two wires has voltage, but the lug with one wire has no voltage? If this is the case then the coil is bad or the small wire from the coil that goes to the lug is broken.

#6 8 years ago

Guess I meant the ohms. Sorry. Anyway checked the diode between the two wires one side has current the other doesn't. Have I found the problem?

#7 8 years ago

The upside down horseshoe one. Put red on the wire/connection black on the cabinet.

#8 8 years ago

Any ideas?

#10 8 years ago

I would be glad to help, but it's like we're speaking two different languages. Voltage, current and ohms are three very different things and they keep getting inter-mixed. If you're not sure what someone is telling you to do then ask questions. Also try to be more clear/exact in your responses because at this point I'm totally confused as to what readings you are getting where. Also, I have no idea what the upside down horseshoe thing is.

If necessary post photos.

As I said before you should have voltage on both leads of the saucer coil. Meter set to volts, black lead on ground and red lead on one lug and then the other. Both readings should be 50-70 volts (or something like that). If you don't then the coil is bad or the coil winding is broken at the lug (common issue). You can test the saucer coil and compare it to another coil.

#11 8 years ago

Sorry the volts. really need to learn my meters. The side with the two wires has power the other side doesn't. Looks like the coil winding is ok.

#12 8 years ago


#13 8 years ago

If the side with single wire does not have any voltage than the coil winding is broken.

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