K1 Front Panel resistance checks
Posted by
egernet on
Apr 01, 2010; 6:52pm
URL: http://elecraft.85.s1.nabble.com/K1-Front-Panel-resistance-checks-tp4838940.html
Before mounting the LCD on the K1 FP board, I am checking the
resistances of adjacent pins on the U1 socket.
Most of them come out unmeasurably high >1M, but 30 and 31 (and 11
& 12) on the U1 socket come out as 480 ohm which is too low. If I
reverse the leads on my DMM, I get 1.65k. Confusing.
I had a look at the schematic and the pins connect to Vss and Vdd,
where the 6 volt regulator U4 is connected.
My question is: Is this correct?
It sounds like I am just measuring the 78L06 and getting funny but
benign readings.
73, Chris
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