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Old 08-14-2015, 12:10 PM
pigsnoot pigsnoot is offline
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Join Date: May 2015
Posts: 3
Default Siel cruise?

Ok I'm not really sure if I understand the Key/matrix stuff well enough...so Here's the service manual of the Siel Cruise, would be great if you guys can take a look at it and see if it's cool with the UMR2! Thanks!
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Old 08-15-2015, 06:10 PM
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John John is offline
Join Date: Jan 2009
Posts: 3,007

It's a little blurry, but I'm a little confused by the "contact board" schematic. It looks like the data lines have pull-up resistors, yet the diode orientation suggests that the data lines will be pulled up by the select signals.

It would help if you could measure the voltage levels with a scope.
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