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Topic: mcHF rev 0.7 - RED screen (Read 2065 times)
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S58J
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Posts: 100
Ich liebe dieses Forum!
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mcHF rev 0.7 - RED screen
« on: 06. May 2018, 23:37:23 »
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Hi
I just did the modification for limiting unwanted interaction between the UI and LOGIC boards (adding capacitors to P2a, P2b and P2c connectors - total 26 capacitors). During power on SOMETIMES I get the red screen (see the photo bellow).
I repeat, it happens sometimes during power on, and after pressing Power button for the second time mcHF powers up normally. Before the mod involving additional capacitors I have never seen this screen. I used 100nf capacitors (20 pcs) on all pins except for the encoders I Q lines. There I used 1nF capacitors (6 pcs).
Any idea?
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S58J
schon länger dabei
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Posts: 100
Ich liebe dieses Forum!
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Re:mcHF rev 0.7 - RED screen
« Reply #2 on: 07. May 2018, 20:40:28 »
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Hi Andreas
Thanks for the reply and the advice. Yes, I will change the 100nF caps to 10nF.
For the rest, I attached a photo how my mod looks like (green coloured caps are 1nF).
Best 73
Janez, W4/S58J
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