New! Dark mode!

Browsing Pinside at night? Getting tired of all the white? Switch to dark mode using the button in the top right (or CTRL-B)!

(Topic ID: 127739)

LW3 VUK not working


By joekiss

5 years ago



Topic Stats

  • 7 posts
  • 3 Pinsiders participating
  • Latest reply 5 years ago by joekiss
  • Topic is favorited by 2 Pinsiders

You

Linked Games

#1 5 years ago

Need some advice where to start. Failed the coil test. Ran the switch test and it def recognized when there was a ball there. I have checked all connections. It just stopped working. Where should I begin?? As always thanks in advance!!

#2 5 years ago

No thoughts?

#3 5 years ago

If the coil won't fire in the coil test, it is most likely a bad transistor. Check Q2 on the PPB board. It is a TIP36C. If it tests ok then check the pre-driver, Q24 on the CPU board. If both those check out ok. It might be the 7402 chip in position 12A on the CPU board. Hope this helps.

#4 5 years ago

I would first make sure there is power to the coil and then do as action76 suggested.

#5 5 years ago

How do I check power to the coil?? Is it possible the coil itself is shot?

#6 5 years ago
Quoted from joekiss:

How do I check power to the coil?

To test the supply voltage, put your red lead on one of the coil leads and the black lead on ground. Meter set on DC 100 volt scale and game on.

#7 5 years ago

Fixed!!! Bad connection!! As always thanks!!!

Promoted items from the Pinside Marketplace
$ 27.00
Electronics
Yorktown Arcade Supply
€ 95.00
Lighting - Led
FlipperLED
From: $ 9.99
Eproms
Matt's Basement Arcade
$ 17.50
Playfield - Plastics
Pinball Haus
From: $ 40.00
Lighting - Interactive
Professor Pinball
$ 50.00
2,350 (Firm)
Machine - For Sale
South Bound Brook, NJ
$ 99.00
Playfield - Other
Arcade Upkeep
$ 35.00
Cabinet - Other
Arcade Upkeep
$ 15.00
Playfield - Decals
Metal-Mods
2,500 (OBO)
Machine - For Sale
Magnolia, TX
From: $ 369.95
Boards
PinSound
From: $ 99.99
Cabinet - Other
Lighted Pinball Mods

Hey there! Got a moment?

Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside