(Topic ID: 166846)

Gorgar - Odd Switch Matrix Problem!

By bonedoc

7 years ago



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  • 1 Pinsider participating
  • Latest reply 7 years ago by bonedoc
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#1 7 years ago

This is an odd one. I bench tested the boards, and they are testing good. I noticed some odd switch behavior. So, I ran the switch test. All switches work great, but the switches on row 1 exhibit something odd. These are switches 9,17,25,33,41. On the chart is says row 1, but it is actually row 2 on the matric, as row 1 is the tilt ad other things connected to the door region.

If I press any switch, it will show closure, but it will then show the one below it is also closed. For example. If I close switch 33, it will flash switch 33 and then switch25. It is very odd. It only does this with this row. What is more interesting is that when switch 9 is closed, it will flash switch 9 then switch 1.

Ive tested and replaced all diodes on this row and also switch #1. Any ideas? Im stumped. Im starting to wonder if the chip reading the rows is lagging or shorted. Odd!

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#2 7 years ago

It was the row chip! 4049

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