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Voltages on Bally rectifier board as-2518-54

BigIan

Registered
10 Years
Joined
Jul 21, 2011
Messages
4,517
Location
Belfast, Northern Ireland
Hi

Firstly ive never worked on Bally machines untill about a month ago when I brought Star Trek back to life. This week I moved Black Pyramid down to the workshop (the one I got free Last year)

It has a Bally rectifier board as-2518-54 (under playfield type) like so

bally-54mount01.jpg

Can anyone tell me the voltages I should be getting from the Transformer on the two plugs that plug into J5 and J6 on the right on the above picture?

Im getting 240v at the connector with the fuse just prior to the transformer.

I suspect that that the transformer is faulty as there is no 240v coming out of of it, below are the readings I am getting on these two plugs

The pin numbers are for my reference only, I doubt they are correct

J5
9 pins
1 - 49.80v
2 - 102.2v
3 - 9.69v
4 - 5.54
5 - not connected
6 - 9.76
7 - 37.9
8 - 13.59v
9 - 13.63

J6
6 pins
1 - 6.48v
2 - 10.75v
3 - 13.12v
4 - 6.90v
5 - 11.00v
6 - 23.19

I dont have the readings from the test points at hand but they were also low especially TP2 which should be 230v, it was 110 or so from memory.

Assuming that the transformer is knackered are there any available out there or can it be repaired etc

Any help appreciated

Cheers
Ian
 
Ok ive found this which is obviously the plug configuration for USA 110v

USA as-2518-54-wiring.jpg

The transformer (power recepticle) end matches but the plug end is nothing like that other than pins 1 and 5 having the AC coming in.

Anybody have a similar config for UK 240v setup ?

Or a photo of the plug from above and I can work out the pins from there.

Cheers
Ian
 
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