Where is R23

Anything about this unique oscilloscope DIY kit
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jslac46
Posts: 2
Joined: Sun May 07, 2017 12:52 am

Where is R23

Post by jslac46 »

I am trouble shooting a problem with V%. It should read ~1.6v, but I read 3.36 volts. The Schematic I downloaded shows three resistors tied to the inverting pin of U2A, R21,22,23. I cannot find any resistor on my rev H board that is labeled R23. Also, R21 is 120 Ohms, not 10k, R22 is 3.3k, as shown in the schematic. The Schematic shows R23 to be a 300 Ohm Resistor, but I have not found it.

Is there a newer Schematic than the Rev F that you post for download?
jye1
Posts: 1221
Joined: Wed Feb 20, 2013 4:58 pm

Re: Where is R23

Post by jye1 »

Please see the H version schematic here http://www.jyetech.com/Products/LcdScop ... c_068H.pdf .
jslac46
Posts: 2
Joined: Sun May 07, 2017 12:52 am

Re: Where is R23

Post by jslac46 »

Got it. Thanks for the link. You might check the link on the product page. I took me to the Rev F. schematic.
jye1
Posts: 1221
Joined: Wed Feb 20, 2013 4:58 pm

Re: Where is R23

Post by jye1 »

There are two links on the page for the two different versions. Sorry it might appear confusing since they look similar.
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