(Topic ID: 139296)

Converting Gottlieb System 80 from 220V to 110V


4 years ago

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  • 20 posts
  • 6 Pinsiders participating
  • Latest reply 5 months ago by Ericpinballfan
  • Topic is favorited by 7 Pinsiders


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#1 4 years ago

I am working on a recently acquired Gtb Spirit that needs to be converted to run on 110V. From what I have read and been told, the 2 primary sides of both transformers need to have the jumper wires of their 110V and com tabs switched from series to parallel. This makes sense for the smaller transformer on the lh side of the cabinet, as the 110V and COM tabs were wired in series, but the large transformer on the rh side of the cabinet is wired much differently. On this one the lines coming in to the primary are going to the 100V and 120V tabs, with a jumper going between the other 100V and 120V tabs, and nothing going to the com tabs like the other one has. This transformer is a Gtb #C-19554-3 and is not referenced in the manual anywhere, so I'm not sure why it's like this or if it's safe to wire like the other transformer. I have a domestic HH and BH here to compare, but they both use different transformers that are single sided an don't take jumpers. I'll post a pic in a little bit, but can someone please look at their imported sys 80 and tell me how that rh transformer is supposed to be wired? Thanks!


#2 4 years ago

Here the other left side transformer just for the heck of it


#3 4 years ago

Have a look at this manual....


....specifically pages 5 and 6. Pg.6 shows the wiring for the primary side (230V) of your transformer. Pg.5 shows the primary side wired for 115V input.

#4 4 years ago

Pinballer73, that link doesn't work...

#5 4 years ago

interesting ... The url doesn't work because of a Pinside bug! The URL has brackets in it, which are getting filtered out, probably because Pinside assumes they contain markup code.

Use this link:

And scroll down to "Gottlieb Technical Seminar Workbook".

#6 4 years ago

Thanks pin73 and pez, I will look again.

#7 4 years ago

Ok. That tech manual does show both of my 230V Transformers 19554 and 19550, which is a step in the right direction, and verifies that their 115V taps should be wired in series to make 230V. However, my problem is why is my 19554 shown in my first pic not wired that way...

#8 4 years ago

Who knows, people do strange things. Maybe the previous connections were done for voltage supply issues or the mistaken belief that they were going to high-tap the flippers or something stupid like that. Make the wiring mods and leave the secondary wiring disconnected, power up the primary and test the secondary taps for the correct voltages before reconnecting the secondary side wiring.

#9 4 years ago

Just looked at pics of 2 other 230V spirits that have the same primary wiring on the large transformer as mine, so i don't think it's something done by mistake or a hack. Can any USA spirit owners show the wiring on the large transformer? Thanks

#10 4 years ago

Bump to the top for Sunday morning. If anyone can look inside their spirit and see how the large transformer is wired on the primary side please let me know. 3 euro games so far don't match the schematic in the manual so not sure how to proceed. Thanks

#11 4 years ago

The connections shown in your first photo above will allow connection to a mains supply of 220V. Simply disconnect the wiring from these terminals and connect as per your other transformer, two windings in parallel, connected to 110V mains supply.

#12 4 years ago

Oh and as I mentioned earlier, if you are worried about the output voltages being too high or low and damaging your game circuitry. Simply remove the secondary wiring and test each voltage tab to the COM terminal/s with your meter. If within range, then power down and reconnect the wiring.

#13 4 years ago

Thanks pinballer73. So I should not be concerned that the com tabs were not used for the large transformer in the first pic, but were used for the smaller?

Here are pics of both transformers now with 120 windings in parallel, but haven't plugged in yet.



#14 4 years ago

Yep, that looks correct, if your main supply voltage is between 110 & 120V.

If you are in doubt, prior to powering up the game, I would disconnect the secondary wiring or remove all the fuses directly after the transformer and disconnect any plugs immediately after the transformer. Then power on the game and test the secondary voltages. That way, if something is a miss, you won't go applying the wrong voltages to the secondary wiring/circuits of the game.

I can't answer why they were connected that way before. The schematic diagram in the manual referenced above shows the common tab used on both occasions.

#15 4 years ago

Cool, thank you very much for your help and looking it over.

#16 4 years ago

No worries. Please report back when you get it all done.

3 years later
#17 11 months ago

I’ve had a couple people contact me recently asking if this voltage conversion wiring worked, so I wanted to resurrect the thread briefly as I never reported back the results.

The final pictures posted above with 2 jumper wires bridging each pair of 120 and com tabs worked fine. Hope that helps future Spirit importers!

#18 11 months ago

Yep - confirmed. Thanks for the help!

1 week later
#19 11 months ago
Quoted from PNBLWZD:

I’ve had a couple people contact me recently asking if this voltage conversion wiring worked, so I wanted to resurrect the thread briefly as I never reported back the results.
The final pictures posted above with 2 jumper wires bridging each pair of 120 and com tabs worked fine. Hope that helps future Spirit importers!

Did you do this to both transformers?

5 months later
#20 5 months ago

Thanks for the tip finding thread!

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