Schematic help
#1
I've completed RED system boards received a week ago. Loaded the software and got an OK from the programmer (after updating the ST firmware). All of the LEDs are appropriate and the Ethernet controller flashes appropriately. But screen is dark. Checking the module supply voltage on pin 2 gives me about 2.3 volts. On pin 3 sort of varies, but positive rather than the expected negative. I do have 5 volts on the back lite supply pin17. These measurements with or without the module DIP122-5NLED installed.

This is PCB10 ver4 11/2013. The pdf instructions Figure 43 with the schematic (for ver3) is blank. I can probably follow traces and do a schematic, but pin 2 doesn't seem to have a trace to my eyes and it would be a lot easier with a schematic.

Anyone help? Thanks,
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Messages In This Thread
Schematic help - by Lawrence Stoskopf - 2015-02-13, 04:44
Schematic help - by DelandeC - 2015-02-13, 07:43
RE: Schematic help - by Lawrence Stoskopf - 2015-02-13, 17:34
RE: Schematic help - by Lawrence Stoskopf - 2015-02-14, 05:17
RE: Schematic help - by ing.sohaib - 2015-05-24, 20:53
RE: Schematic help - by Lawrence Stoskopf - 2015-02-16, 16:34
RE: Schematic help - by DelandeC - 2015-02-16, 17:16
RE: Schematic help - by Lawrence Stoskopf - 2015-05-25, 03:24

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