(Topic ID: 88574)

Tech: Demo Man switch matrix problem

By billsfanmd

10 years ago



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#1 10 years ago

Ive gotten good at troubleshooting these but before I started wanted to get some opinions as this one should be easy if I know where to start. Every switch in row 1 activates the next switch down in row 2. No matter which switch I press along row 1 or 2 it activates the other one...all other switches work fine. On the 8 by 8 grid all the problems occur on top 2 rows.

Any troubleshooting tips would be great

After quick read looks like row 1 and 2 wires are shorted together.

Mike

#2 10 years ago
Quoted from billsfanmd:

After quick read looks like row 1 and 2 wires are shorted together.

That would most likely be it. Remove the row and column connectors, heck for continuity between the two columns with a DMM and then start breaking down the circuit from there.

#3 10 years ago

thanks...found it already...when I reconnected must have pinched row wire in there...its snug in there..all good now.

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