The Aussie Pinball Arcade

Aussie Pinball Forums => Technical Matters => Pinball Repairs / Problems & Assistance => Topic started by: solar value on January 03, 2012, 09:42:35 PM

Title: Black Knight voltage conversion
Post by: solar value on January 03, 2012, 09:42:35 PM: Hello everyone,

I need to convert a BK from US 120V to run on our 240V. I can't find the manual (with the blue cover) online. I've found the instruction booklet but this doesn't have the transformer connection table. Does anyone have a link to it?

Anyhow, I believe there are four steps involved in the conversion:

1. Change the plug.

2. Re-wire the transformer.

Here's the whole transformer assembly:

(http://i1128.photobucket.com/albums/m483/antswanmail/DSCN2010.jpg)

and here is the transformer:

(http://i1128.photobucket.com/albums/m483/antswanmail/DSCN2015-1.jpg)

So I believe I need to change the connections on this molex connector.

(http://i1128.photobucket.com/albums/m483/antswanmail/DSCN2016.jpg)

Does anyone know what the nw configuration should look like?

3.Change the varistor. I have this varistor:

(http://i1128.photobucket.com/albums/m483/antswanmail/DSCN2018.jpg)

It's rated at 275VAC with a surge current of 6000A (1 time) and 4500A (2 times), will this do the job?

4. Change the fuse (bottom right):

(http://i1128.photobucket.com/albums/m483/antswanmail/DSCN2011.jpg)

It says I need a 4A fuse, I have a 5A, will this be OK or should I get another?

Thanks in advance for any help, Anthony.
Title: Re: Black Knight voltage conversion
Post by: PinPal on January 03, 2012, 10:54:06 PM: Hi Anthony, here is a pick of my Black Knight transformer and the plug. I hav the blue BK manuel but it dont say much about the transformer. Hope this helps you ^^^
Title: Re: Black Knight voltage conversion
Post by: PinPal on January 03, 2012, 11:19:39 PM: Closer pick of the plug from BK transformer, same side you are holding.
Title: Re: Black Knight voltage conversion
Post by: solar value on January 03, 2012, 11:43:50 PM: Thanks, that's exactly what I was after, looks like it will be easy to repin. I see yours is the early prototype with the transformer in the head, the transformer is in the base of the cabinet in the machine I have here.

I should have also mentioned to everyone that the text next to the fuse says a 4A fuse is required for 220V, 8A for 117V.
Title: Re: Black Knight voltage conversion
Post by: Retropin on January 04, 2012, 09:47:03 AM: If it says 4A.. then 4A you should use
Title: Re: Black Knight voltage conversion
Post by: solar value on January 04, 2012, 10:35:45 AM: Quote from: Retropin on January 04, 2012, 09:47:03 AM
If it says 4A.. then 4A you should use

Yes, sound advice, stupid question really :D
Title: Re: Black Knight voltage conversion
Post by: PinPal on January 04, 2012, 02:50:17 PM: Yes, the transformer in mine is in the back box, it dident hav a cage around the trans when I got my BK. Hav to watch I dont touch it while the game is on, might get a ZAP out of it ^&(
Title: Re: Black Knight voltage conversion
Post by: solar value on January 05, 2012, 09:03:31 PM: OK, so does any one know which extractor tool is required to get the female pins out of the Molex connector housing (and where to get one)? Ive got the Hanlong HT-319D pin extractor which is supposed to be for the female pins, but it doesn't fit.
Title: Re: Black Knight voltage conversion
Post by: necroscope on January 05, 2012, 09:28:41 PM: Jaycar sell both the male and female molex pin extractors
Title: Re: Black Knight voltage conversion
Post by: solar value on January 05, 2012, 09:35:32 PM: Quote from: necroscope on January 05, 2012, 09:28:41 PM
Jaycar sell both the male and female molex pin extractors

yep, the one I have is the female pin extractor from Jaycar but it doesn't fit over the female pins, the inside diameter is too small. That set from Jaycar must be for a different size molex pin becase neither the male or female fit.