TG16 II button not working

[lastcallhall]

So I picked up a TG16 this weekend, and I immediately set to component and region modding it. The mods are fine, but something I didn't notice when I bought the system was that the II button on the controller doesn't work unless the turbo is all the way on, and then it's sporadic at best. I tried another controller, same thing. I reflowed all the connections inside the controller, the DIN jack on the TG16, the filters that are in line with the buttons and pin 16 on the HuC6280 (which controls button II) and no go. So I tried grounding pin 16 and every time I do, the console registers a return as if I pressed button II. So i ran a wire from pin 16 on the HuC6280 to the filter on the controller line that controls button II, no go. I shorted the filter, no go. I replaced the filter, no go. So at this point, Im not sure what to do as I've done everything I can think of... help!

[Keith Courage]

So you only have the one controller to test it with? The reason I ask is because if the button will work with rapid on but not off it is generally a controller issue itself and not a system problem.

try scrapping off the rubber looking contact stuff on the controller pcb for the rapid fire slider. This usually fixes the problem. If not then there is a broken trace somewhere in the controller pcb itself.

[NecroPhile]

So you only have the one controller to test it with?

I tried another controller, same thing.

I've got nothing.  I'd try sacrificing two rabbits (or a large hen) to the Lamia.

[lastcallhall]

Who knew rabbits could hold so much blood?

Anyway, I also forgot to mention that I replaced the DIN jack too. I also tested continuity from the chip to the control. I just dont get it.

[PCEngineHell]

Your only option now is to cross the wastelands and travel to the Dark Tower.

[NecroPhile]

Heh, bring your father's horn.

[PCEngineHell]

His button II was all like "See you later alligator after a while crocodile don't forget to write..." before it's dipolar computer finally died.

[thesteve]

the controller is multiplexed
that means if its only 1 button it can only be the controller
note the turbo switches tarnish causing this

[lastcallhall]

the controller is multiplexed
that means if its only 1 button it can only be the controller
note the turbo switches tarnish causing this

Yeah, I read up on the controller function before I posted here. So, with that in mind, I had an idea the other day:

Take the cable out of my known working PCE pad, and swap it into the TG16 pad, and vice versa. That way I have a PCE pad that I know works that I can test on my TG16...

And it works. That's so fucking strange that the SAME thing happened to two separate controllers. So, I guess my next steps are to get the controllers working. I'm guessing it's either the 74HC157 (which I think I have on hand) and/or the 74HC163 (which I'll have to order), since it controls the rapid fire, which - and correct me if im wrong here - is just a simple counter that polls the controller for rapid fire (at which point II works).

Thanks for the help, all!

[PCEngineHell]

Just for the sake of doing so, you may want to extend the metal pins some on the turbo slider switches, and clean/sand them some to get their connection going again. You will prob have to clean the spots on the pcb too real well. I had a game pad that suffered a similar situation to yours once, and that fixed it.

[thesteve]

Also some of the controller boards have carbon traces that fail

[choijimmy]

Also some of the controller boards have carbon traces that fail

yes, I saw this issue in GT most of the time. I fixed by sanding those black carbon trace ( esp the turbo switch carbon trace ) with very fine grained/soft sandpaper carefully. I am not sure this is the right way to do it or not but it fixed two of my GT Button I issue.

[PunkCryborg]

Also some of the controller boards have carbon traces that fail

yes, I saw this issue in GT most of the time. I fixed by sanding those black carbon trace ( esp the turbo switch carbon trace ) with very fine grained/soft sandpaper carefully. I am not sure this is the right way to do it or not but it fixed two of my GT Button I issue.

My button I isn't working on my GT, will have to try that

[thesteve]

It's often the jumpers on the te/gt
A jumper wire fixes it