(Topic ID: 54503)

Black Knight Club...Members Only!

By mof

10 years ago


Topic Heartbeat

Topic Stats

  • 3,192 posts
  • 303 Pinsiders participating
  • Latest reply 26 days ago by vec-tor
  • Topic is favorited by 161 Pinsiders

You

Linked Games

Topic Gallery

View topic image gallery

IMG_4866 (resized).jpeg
IMG_4867 (resized).jpeg
20240211_173024 (resized).jpg
pasted_image (resized).png
100_5044 (resized).jpg
Screenshot_20240202_022524_Chrome (resized).jpg
SndBd_Conn-2 (resized).png
SndBd_Conn-3 (resized).png
SndBd_Conn-1 (resized).png
BKUpperTroughMetal (resized).jpg
39AEBF82-A933-49F4-BBBB-BC68B30656EE (resized).jpeg
bk_sst.jpg
IMG_9825 (resized).jpeg
IMG_9824 (resized).jpeg
IMG_9823 (resized).jpeg
IMG_9817 (resized).jpeg

You're currently viewing posts by Pinsider johnstewart.
Click here to go back to viewing the entire thread.

#2817 1 year ago

Hello; my girlfriend has a BK we picked up a year or so ago; her family had one when she was a kid and wanted for her collection. My experience in dealing with games has been newer (90's and newer) and older (one old EM game I have), so this era of machine is new to me (electronics, but weirder than I'm used to!).

It has been working fine, but a while back the Start button stopped working. It's been in freeplay, but even adding credits, the button doesn't operate. Thinking it was just a dirty switch, I tried cleaning it, and then even jumpered it with a piece of metal, and it's not starting the game. Also confirmed the physical switch seems to work fine by testing it with a multimeter continuity test.

This seemed odd to me, so I've been mining this thread for more info, and see there's a whole concept of a "switch matrix".

Am I correct in understanding that if one of the other switches in the same column or row as the start button is not operating, it can also stop the start button from working?

I see this general Williams guide mentioned in the thread: http://www.firepowerpinball.com/downloads/FlipperManual.pdf

https://pinside.com/pinball/forum/topic/black-knight-clubmembers-only/page/15#post-3802375

I had a problem on my BK a while back where the start button wasn't working. I checked so many things until i finally looked at the switch matrix and realized i had to check every other switch on the same column and row as the start switch. Sure enough it was the ball-roll tilt on the left side of the cabinet had a wire broke off (same row as start switch). That's when i finally 'got' how the switch matrix works, and perhaps more importantly: how to troubleshoot it.

https://pinside.com/pinball/forum/topic/black-knight-clubmembers-only/page/18#post-4146945

Quoted from frunch:

Those are the correct connectors.
Are you familiar with the diagnostics for the game? You have to use the switches on the coin door (open the door, you'll see 3 push-button switches on the 'back' of the coin door)... If you have the manual, you can follow the instructions from it. If not, the manual can be downloaded for free at ipdb.org (search for Black Knight). Basically, you push the middle switch into the down position (it will stay down until pushed again, which will pop it back up), then push the 'advance' switch to the right of it. That should start the display test. Push the middle button again so it pops back up. Now, pushing the advance button again should begin the sound test. Pushing advance again starts lamp test. Pushing it again starts the solenoid test. Push the switch again for the switch test. If any switches are being activated, the number of the switch(es) will appear in the credit/ball count display (refer to switch matrix diagram in manual to decipher which switches it detects are closed).
I would start the switch test, then run the jumper between a column pin and row pin and check the display to see if any number appears. I'd probably try a working column first, and make sure it registers a switch closure (a number will appear on a display) when the jumper is on any row pin. That way you'll know you're doing the test correctly. Then try running the jumper from the pin for column five and see if it registers a switch closure when the jumper is on any of the row pins. If no numbers come up, then we know the chip Schwaggs mentioned (IC18) is the most likely culprit.
Good luck!

In looking at that FlipperManual.pdf above, I don't see where these "pins" for the "switch matrix" would be, where I might be jumpering between. Is that in the backbox somewhere?

https://pinside.com/pinball/forum/topic/black-knight-clubmembers-only/page/30#post-4665386

Quoted from frunch:

Have you verified that the credit button (aka start button) is working in switch test? It's switch 3 on the switch matrix chart:
[quoted image]

Aha, good to know the start button == "credit button"!

This post has a picture of the "switch matrix":

Quoted from mwsmith:

Example from BK manual:
Shorted diodes (or an incorrectly wired switch) can cause "rectangle" switch matrix problems as follows: The lower left 3-bank upper target is down (switch 27), and lower right 3-bank center target is down (switch 30). A ball enters the lockup trough making switch 43, a shorted diode at switch 27 would cause switch 46 Playfield Tilt to be (incorrectly) indicated. Note that the "rectangle" is always completed with an incorrect switch diagonally opposite from the switch with the shorted diode.
[quoted image]

So, I think my plan is to:
- Try and get into switch test mode
- Test all of the switches in column 1 and row 3
- See if I can find where these switch matrix "pins" are to possibly jumper (still not real clear on this bit)
- PROFIT (oh, wait)
- Try and identify which of these switches (because it doesn't seem to be Start/Credit button switch itself) is not working (would it likely be OPEN? Or CLOSED?)

Seem about right? Thank you!

#2819 1 year ago
Quoted from Mathazar:

This may sound like a longshot, but worth it if it turns out to be the issue.
BK will not start a game if one or more balls are "not present" in the upper or lower troughs. Make sure there are no balls stuck somewhere on the playfield (outside of the troughs), make sure the balls in the troughs are actually sitting on their rollover switches, and lastly make sure those rollover switches in the troughs are registering in the switch test.

Holy heck Mathazar you nailed it. There was no ball in the top trough, which is something I never ever would have realized was a possible problem without your help. Many thanks!

The Black Knight lives again.

image (resized).jpgimage (resized).jpg
Promoted items from the Pinside Marketplace
$ 399.95
Lighting - Led
Pin Stadium Pinball Mods
Led
$ 95.00
Cabinet - Sound/Speakers
Pinball Mod Co.
Sound/Speakers
3,000 (OBO)
Machine - For Sale
Egg Harbor Township, NJ
$ 59.95
Playfield - Toys/Add-ons
Hookedonpinball.com
Toys/Add-ons
$ 7.95
Playfield - Toys/Add-ons
ULEKstore
Toys/Add-ons
$ 18.95
Eproms
Pinballrom
Eproms
$ 135.00
Cabinet - Toppers
Sparky Pinball
Toppers
From: $ 90.00
Tools
Pincoder Store
Tools
$ 59.95
Playfield - Toys/Add-ons
Hookedonpinball.com
Toys/Add-ons
$ 12.50
Lighting - Led
RoyGBev Pinball
Led
$ 13.50
$ 7.95
Playfield - Toys/Add-ons
ULEKstore
Toys/Add-ons
Wanted
Machine - Wanted
Newcastle, OK
$ 69.00
Gameroom - Decorations
Pinball Pimp
Decorations
$ 53.95
Eproms
Pinballrom
Eproms
$ 959.00
Flipper Parts
Mircoplayfields
Flipper parts
$ 649.95
Lighting - Led
Pin Stadium Pinball Mods
Led
$ 129.00
Cabinet Parts
Bob's Pinball Stuff
Cabinet parts
$ 299.95
Lighting - Led
Pin Stadium Pinball Mods
Led
$ 17.00
Playfield - Decals
Metal-Mods
Decals
$ 1,059.00
Flipper Parts
Mircoplayfields
Flipper parts
$ 44.99
Cabinet - Shooter Rods
Pinball Shark
Shooter rods
$ 69.00
Gameroom - Decorations
Pinball Pimp
Decorations
From: $ 649.95
Lighting - Led
Pin Stadium Pinball Mods
Led
From: $ 5.75
Playfield - Other
Rocket City Pinball
Other
From: $ 30.00
Cabinet - Toppers
+CY Universal
Toppers
$ 15.00
Cabinet - Other
Space Coast Pinball
Other
$ 15.00
Playfield - Decals
Metal-Mods
Decals
$ 5.95
Playfield - Protection
The Pinball Scientist
Protection
From: $ 8.00
Cabinet - Other
NO GOUGE PINBALL™
Other
Great pinball charity
Pinball Edu

You're currently viewing posts by Pinsider johnstewart.
Click here to go back to viewing the entire thread.

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-clubmembers-only?tu=johnstewart 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.