Author Topic: BDM-010 x button always active  (Read 823 times)

Offline miguibuk

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BDM-010 x button always active
« on: December 02, 2022, 05:43:07 AM »
Hi, the x button is always active even with the board without connections. Can you help me?
« Last Edit: December 02, 2022, 05:47:38 AM by miguibuk »

Offline miguibuk

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Re: BDM-010 x button always active
« Reply #1 on: December 05, 2022, 05:52:41 AM »
No help? I have the X button continuously grounded and I don't know why.

Offline RDC

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Re: BDM-010 x button always active
« Reply #2 on: December 06, 2022, 01:29:38 AM »
What all was done to the controller? What all was tried? No one knows if it was brand new out of the box like that, or it it's had 15 people that don't know one end of a Resistor from the other put their fingers all over it.

If it was messed with, even by one person, especially if they were adding duplicate buttons, then it could be anything, though I'd suspect the X line is shorted to ground wherever they were messing around.

If it's a pretty much untouched controller, then the Cap on the X line is what I'd remove first to make sure that thing isn't shorted or dragging down the line causing it. Then if that doesn't do it and there is no obvious signs of a short on that X line then the PCB could have a manufacturing error as that X trace is buried in an internal layer or the MCU is suspect as all button lines pretty much just go go right to it.

Screwing up is one of the best learning tools, so long as the only thing you're not learning is how to screw up.

Offline miguibuk

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Re: BDM-010 x button always active
« Reply #3 on: December 06, 2022, 11:27:02 AM »
Thanks for answering. You're right, that component is blown up, I hadn't seen it. After cleaning the area the short has disappeared. What is the value of that component?
« Last Edit: December 06, 2022, 11:35:32 AM by miguibuk »

Offline RDC

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Re: BDM-010 x button always active
« Reply #4 on: December 06, 2022, 11:43:28 AM »
1nF, 4v or higher.
Screwing up is one of the best learning tools, so long as the only thing you're not learning is how to screw up.

Offline miguibuk

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Re: BDM-010 x button always active
« Reply #5 on: December 06, 2022, 11:01:58 PM »
Part changed and working, thanks for everything and for sharing your knowledge.

Offline RDC

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Re: BDM-010 x button always active
« Reply #6 on: December 07, 2022, 02:01:40 AM »
Welcome.
Screwing up is one of the best learning tools, so long as the only thing you're not learning is how to screw up.

 

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