(Topic ID: 201543)

Black Knight continued woes

By StratDoc

6 years ago



Topic Stats

  • 4 posts
  • 2 Pinsiders participating
  • Latest reply 6 years ago by Schwaggs
  • No one calls this topic a favorite

You

Linked Games

#1 6 years ago

This pin is killing me. I have made mistakes and the pin seems to have gremlins as well.

Pin was working great and then the GI decide to go out. I am using a new Rottendog power supply. I have checked continuity from the GI connector pins through the cabinet, backboard, playfield, and cabinet door. Everything is okay. No voltage readings to cabinet, backboard, playfield when the pin is turned on and the GI is connected to the power board. The 6.3vdc connector was brown so repinned that. However, I am not reading any voltage on the yellow 6.3vdc wires coming from the cabinet. All other voltage test points on the Rottendog board check out okay - no 6.3vdc test point on the board.

Thanks to everyone that continues to help along the way.

#2 6 years ago

I had problems with the GI on my BK too. It seems the load on this circuit is high and it overloads the connectors.

Which connector did you replace, the 2 pin or the 9 pin?

This is an AC circuit so you need to measure it differently. You put your meter on AC and you do not measure from ground, you measure between the AC supply and AC return. On this circuit, the 2 pin connector on the far right bottom of the power supply board with 2 yellow wires is the supply and return from the transformer. Measure across these 2 pins with your meter on AC.

GI power exits at the 9 pin connector right next to the 2 pin connector. This connector has yellow wires and yellow with white wires. Maeasure voltage again with your meter on AC and from one of the yellow wires to one of the yellow with white.

These connectors can get so hot they unsolder connectors from the board. When you have the power supply board out, make sure the 2 and 9 pin connectors and the 20 amp fuse holder clips are soldered in securely. You should also check that the clips on the fuse are nice and tight.

#3 6 years ago

It was indeed the fried connector - I replaced the 9 pin but the 2 pin was completely shot. I checked marco and didn't see a 2 pin connector replacement.

#4 6 years ago

That 2 pin was burned on both my system 7 power supplies.

Board part: https://www.greatplainselectronics.com/proddetail.asp?prod=15-31-1026

Housing that plugs into the board part: https://www.greatplainselectronics.com/proddetail.asp?prod=19-09-1029

Sockets for the housing are standard 0.093 round molex type: https://www.greatplainselectronics.com/proddetail.asp?prod=02-09-1119

Promoted items from the Pinside Marketplace
$ 15.00
Playfield - Decals
Metal-Mods
Decals

Reply

Wanna join the discussion? Please sign in to reply to this topic.

Hey there! Welcome to Pinside!

Donate to Pinside

Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!


This page was printed from https://pinside.com/pinball/forum/topic/black-knight-continued-woes and we tried optimising it for printing. Some page elements may have been deliberately hidden.

Scan the QR code on the left to jump to the URL this document was printed from.