Jungle King Freeplay using Bob Roberts Method?

scamp

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Has anyone rigged a Taito Jungle King/Hunt for free play using the Bob Roberts method of connecting the coin mech switch to the player 2 button?

I know he says it works for 95% of games, could JK be part of the 5%?

I cannot get it to work...either nothing happens or it starts firing off credits as soon as I turn on the machine!

I basically took a piece of wire and made it have 2 ends on both ends of the wire...I put a male and female wire connector on each of the ends so that one end of the wire had a male and female coming off and the other end did the same...I then removed one of the connectors from the coin switch and connected my wire in its place with the female and them put the male end of my wire into the removed wire....I did the same on the player 2 button...basically no harness wires were cut and I used the existing connectors...Anyway it didn't work...

I really want to rig this for freeplay without adding an additional button in the coin door or something...and there is no freeplay chip out there...

Any ideas would be appreciated!! Thanks!

-S
 
Mine is set up via this method and it works flawlessly. Make sure you connect both non-ground wires on each side. It sounds like you wired the signal wire for the coin switch to the ground wire on player two.
 
Sometimes I find that if the wire from the Player 2 switch to the coin switch is too long, it won't work....
 
Do you keep the button and the coin switch still connected? I'm assuming yes, otherwise the button would not work at all....

The gauge of wire wouldn't matter right? I'm using 18 gauge....

thanks!
 
Do you keep the button and the coin switch still connected? I'm assuming yes, otherwise the button would not work at all....

The gauge of wire wouldn't matter right? I'm using 18 gauge....

thanks!

Yeah, they're both still connected. I can coin up with coins and I can start a 2 player game when there's 2 credits in the machine. My wire is maybe 2 ft long and as thick as any of the control panel wires.
 
So does this work on your Jungle King? I noticed in your profile you have one...
 
The credit switch will have two wires - signal and ground. The 2P start button will have the same two wires (although a different signal) Connect the two signal wires together. It should now work. If not, try connecting the two ground together as well (just in case the coin ground is different)...
 
So either I've made a bad cable or I'm connecting the wrong wires...

My wire is actually 5 pieces...a single wire joined at each end with 2 pieces of wire and on each of those ends are connectors (1 male and 1 female) to connect to the switch and the existing wire (the one removed from the switch)...hopefully this explanation makes sense...does it sound like it's an issue?
 
Without seeing a picture, I couldn't tell you. But you only need one wire, with one end connected to the coin switch and the other end connected to the Player 2 Start button...
 
Well maybe that was the issue then...I've been trying to keep everything connected, but it sounds like you are saying remove the existing signal wires from the button and switch and make a single wire that connects to them...and the existing signal wires are left unhooked...if that's right then that is where I messed things up....does that make sense??
 
No No No...

Leave the game wired up as original. then get yourself 2 feet of wire. Use that wire to connect the non-ground wire on the coin switch to the non-ground wire of the start buttons...
 
Well maybe that was the issue then...I've been trying to keep everything connected, but it sounds like you are saying remove the existing signal wires from the button and switch and make a single wire that connects to them...and the existing signal wires are left unhooked...if that's right then that is where I messed things up....does that make sense??

To do it the most basic way, you would disconnect the signal wire from the coin switch and connect it to the signal side of the player 2 switch.

Show us some pictures.
 
ok here are my photos...one shows one end of my wire...the other shows how I use this end to connect the coin switch side...

the other end of the wire is the same and I connect it the same way to the button, so I left those out...

but you should see that I am trying to keep everything connected while injecting the connection between the switch and the button....

Hopefully this will shed some light on what I am doing wrong!!

thanks for the help!!
 

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It looks like you have it hooked up to the signal wire on the coin switch. Do you have a picture of it connected to the button?
 
Ok I've attached the photo...hopefully this helps...I do believe I have it connected to the signal..its a blue wire nd the other wire on the button is actually 2 black wires that appear to go to the other buttons..so it must be ground...

So it sounds like I was doing the right thing and my wire was correct...so could it be the gauge of the wire causing an issue? I'm using thicker wire...18 gauge...I guess I could recreate the wire with a thinner gauge wire and see if it helps....
 

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ok here are my photos...one shows one end of my wire...the other shows how I use this end to connect the coin switch side...

the other end of the wire is the same and I connect it the same way to the button, so I left those out...

but you should see that I am trying to keep everything connected while injecting the connection between the switch and the button....

Hopefully this will shed some light on what I am doing wrong!!

thanks for the help!!

Looks like your on the wrong terminal on the coin switch. Isnt the middle pin N/C on those switches?

Its been a long time since I've had to fiddle with one of those so I might be totally off.

Matt
 
All I can say is that it was wired with those plugs, I just replaced the wires.is that something that can be tested? Like with a logic probe or multimeter? Just curious....
 
Its probably right then. You can look really close at the coin switch and you should see "COM" "N/O" and "N/C". you want your sires on COM and N/O.

Matt
 
It sounds OK.

My coin door looks similar and the terminal on the coin switch farthest from the door is common and the middle connection is NO (normally open).
If you can still enter a credit with the coin switch and still start a 2PL game with the 2PL button, then that section of your wire is OK, just make sure you have continuity through the middle section.

Each of the four terminals on the wire harness you created should show zero ohms when tested against one another.

The schematic shows that the coin door ground and the control panel ground are hooked together at the PCB (pins A and 1). So, this should be all you really need.

Try unplugging the NO terminal from the coin door switch and leaving everything else connected. Maybe something down there is messing with you. This is kind of interesting in that it should be simple, but something is amiss...
 
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