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Old 9th February 2014, 07:54 PM   #1181
WalterW is offline WalterW  Netherlands
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That's the schematic I have too, if somebody has a better one, pls post...
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Old 9th February 2014, 07:58 PM   #1182
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The components are in the same positions so the schema should do for debugging.
But of course the correct schema would be welcome.

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Old 9th February 2014, 08:02 PM   #1183
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Here's the one I have.

https://dl.dropboxusercontent.com/u/...-schematic.png
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Old 10th February 2014, 08:27 AM   #1184
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Quote:
Originally Posted by McQuaide View Post
Seems to be the same when it comes to the positive rail. I haven't checked the rest. Neither have I checked if Andrews claim is correct that there should be errors in the schema - it is usable anyway.

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Old 10th February 2014, 10:31 AM   #1185
AndrewT is online now AndrewT  Scotland
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If my comment in post1179 is wrong then tell me and tell the other Members.
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Old 10th February 2014, 11:01 AM   #1186
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Andrew, the arrows in Q1 and Q2 should be pointing downwards so you were quite right. Now I didn't give the fact much attention since I put it right in my mind and thought.

Since the actual components are FET's the symbols are wrong as well BUT they can be useful for describing the function as is.

BUT my call for help took a totally different direction...

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Last edited by Turbon; 10th February 2014 at 11:12 AM.
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Old 10th February 2014, 11:26 AM   #1187
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This schematic is also what Salas posted in another topic. I also built my board by that, so it should be fine. You should check each wire from the board setup to see if really all the components are facing the right way and all wires conenct to the right components.

PS: I guess the system doesn't work well with 1 side partially dead. You'll have to find the dead component, replace and then go on.

R13 has 0,168V dropping, meaning ~17mA if you used 10R. If T6 is a 2sk170, than it is dead for sure (12mA is max for BL).

Last edited by mrWagner; 10th February 2014 at 11:47 AM.
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Old 10th February 2014, 11:33 AM   #1188
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Thanks mrWagner.
It worked allright for days +9.86V -9.79V but I believe I shorted something poking around measuring. So everything are where they are supposed to be.

V+ still rising... When I first took a reading after the short it was 12.5ish but last evening it was 16.5ish... Very strange.

I have ordered spares.

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Last edited by Turbon; 10th February 2014 at 11:37 AM.
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Old 10th February 2014, 11:51 AM   #1189
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I did as Salas suggested and measured each chain of LEDs with the FET that was going to be used with them on the breadboard.
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Old 10th February 2014, 11:56 AM   #1190
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KD, yes I will probably need to redo that when I have replaced, as I believe, Q2 and got it working again. That is another issue.

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