H5 A3 FIXES

Information and progress towards the H5 board.
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Re: H5 A3 FIXES

Post by exxos » Tue Oct 06, 2020 10:16 am

dragmar wrote:
Tue Oct 06, 2020 8:34 am
@exxos As soon as PCB H5 you have. Did you fix any mistakes before shipping? will everyone have to do it themselves?
I've not even got the boards yet.. And yes people will have to do the fixes themselves.
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Re: H5 A3 FIXES

Post by Icky » Thu Oct 22, 2020 1:15 pm

Started to look at the patches and the board. I think I will probably do the patch wires underneath where possible then I don't have to look at them :)

Will probably start tonight and will upload alternative pics if I manage to patch another way to @exxos' original patches.

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Re: H5 A3 FIXES

Post by Icky » Sat Oct 24, 2020 8:53 pm

Helpful Hint #1

Not quite a fix but more of a hint. The S2 MIDI header on the H5 has a header close to it that can be used to take the L/R audio out from the MIDI card. However don't put a vertical header in as the S2 card is in the way. Instead put in a 90 degree header.

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Re: H5 A3 FIXES

Post by exxos » Tue Oct 27, 2020 2:21 pm

Check #1 - MAKE SURE YOUR IC11 ISN'T UPSIDE DOWN

On my board, and I assume everyone else's is also, please check that the dot on the chip is on the top left, not on the bottom right as in this image because this is upside down. :roll:

do not power up as the IC will get red-hot and kill it...

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Re: H5 A3 FIXES

Post by Icky » Tue Oct 27, 2020 3:50 pm

exxos wrote:
Tue Oct 27, 2020 2:21 pm
IC11 UPSIDE DOWN

On my board, and I assume everyone else's is also, please check that the dot on the chip is on the top left, not on the bottom right as in this image because this is upside down. :roll:

do not power up as the IC will get red-hot and kill it...
Just checked my board and its the right way round.

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Re: H5 A3 FIXES

Post by exxos » Tue Oct 27, 2020 4:37 pm

Icky wrote:
Tue Oct 27, 2020 3:50 pm
Just checked my board and its the right way round.
odd. wonder how many.. though they said some of the boards were scratched and had to be redone, so maybe just half the boards have the issue :shrug:
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Re: H5 A3 FIXES

Post by exxos » Tue Oct 27, 2020 10:00 pm

Fix #4 - SMT MFP FIX


D3,D4 need to be swapped on the MFP...

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Re: H5 A3 FIXES

Post by exxos » Tue Oct 27, 2020 11:10 pm

Fix #5 - YM AUDIO BIAS FIX (NO AUDIO)


Remove C60 and blob over C60 pads.

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Re: H5 A3 FIXES

Post by terriblefire » Wed Oct 28, 2020 9:39 am

You could avoid all this pain by sticking to top and bottom for data signals. I mean its not like the board is tight for space :P
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Re: H5 A3 FIXES

Post by exxos » Wed Oct 28, 2020 9:44 am

terriblefire wrote:
Wed Oct 28, 2020 9:39 am
You could avoid all this pain by sticking to top and bottom for data signals. I mean its not like the board is tight for space :P
No way possible unfortunately. Was really pushed to fit in 3 layers.
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