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Topic: [solved] WM8731 not detected (Read 1982 times)
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Paul C. H.
Neuling
 Offline
Posts: 23
Ich liebe dieses Forum!
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[solved] WM8731 not detected
« on: 29. January 2018, 01:24:19 »
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Dear all,
I am building my OVI40 UI board, successfully installed the CPU, LCD and boot up normally.
But I see "WM8731 not detected" even I have installed both (and also resistors bridging the serial buses, verified soldering with 10x mini microscope).
To pinpoint the problem, I want ask if the "WM8731 not detected" refers to U1 or U12?
Paul
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| « Last Edit: 29. January 2018, 09:37:28 by DL8EBD » |
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I understand only two German words.
with help of this forum, I often change from "g-e-t-l-o-s-t" to "g-e-l-ö-s-t".
what in front of me was feeling of "f-u-n-k", now it is a piece of almost working "f-u-n-k"
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DL8EBD
positron
Urgestein
Offline
Posts: 1924
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Re:WM8731 not detected
« Reply #1 on: 29. January 2018, 04:15:06 »
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Paul, here are the schematics
https://www.amateurfunk-sulingen.de/forum/attachments/UHSDR_OVI40_UI_18__sheet.pdf
I think, you test without an RF Board, right?
The 3V for the codecs come from the RF board.
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| « Last Edit: 29. January 2018, 05:28:35 by DL8EBD » |
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bitte keine technische Fragen oder Diskussionen via PN, dafür ist das Forum da.
vy73
Thomas
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Paul C. H.
Neuling
Offline
Posts: 23
Ich liebe dieses Forum!
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Re:WM8731 not detected
« Reply #2 on: 29. January 2018, 09:26:28 »
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The 3V for the codecs come from the RF board.
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I temporarily borrowed 3V3 from UI_3V_CPU rail. Very nice design with three DC supplies of 3V3.
No more error message, thanks DL8EBD.
Paul
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Logged
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I understand only two German words.
with help of this forum, I often change from "g-e-t-l-o-s-t" to "g-e-l-ö-s-t".
what in front of me was feeling of "f-u-n-k", now it is a piece of almost working "f-u-n-k"
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DL8EBD
positron
Urgestein
Offline
Posts: 1924
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Re:[solved] WM8731 not detected
« Reply #3 on: 29. January 2018, 09:39:00 »
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super Paul!
your little problem is "gelöst" 
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Logged
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bitte keine technische Fragen oder Diskussionen via PN, dafür ist das Forum da.
vy73
Thomas
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