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Author Topic: Need help with a Gyruss PCB  (Read 6796 times)
Ron
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Building my first DK cab :-)


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« on: October 31, 2011, 09:12:15 PM »


Is there somebody on this board who can help me with a bad functional Gyruss PCB?
Everything is working except the sound  confused
I'm a really noob when it comes to electronics 
Hope somebody can help me out with this or knows somebody who can.

Thanks in advance

Ron
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PaulSwan
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ZZZ


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« Reply #1 on: October 31, 2011, 09:52:28 PM »

Post a good picture of your complete top (sound) board.
Paul.
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ZZZ
Robinholland
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« Reply #2 on: October 31, 2011, 09:54:42 PM »

Do you have 12 volt for the amp on board ?
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Ron
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Building my first DK cab :-)


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« Reply #3 on: October 31, 2011, 10:09:23 PM »

Post a good picture of your complete top (sound) board.
Paul.
I will do that tomorrow.
Thanks Paul.
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Ron
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Building my first DK cab :-)


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« Reply #4 on: October 31, 2011, 10:10:05 PM »

Do you have 12 volt for the amp on board ?

Yes, i have.
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Ron
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Building my first DK cab :-)


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« Reply #5 on: November 01, 2011, 06:31:03 PM »

Added a photo of the board.

https://picasaweb.google.com/109956512574431177388/1November2011?authkey=Gv1sRgCKOug--zsLqRYA#

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Etienne MacGyver
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The Netherlands


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« Reply #6 on: November 01, 2011, 07:21:17 PM »

let me help you  Wink



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Ron
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Building my first DK cab :-)


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« Reply #7 on: November 01, 2011, 07:46:05 PM »

Thanks, Etienne  Cheesy
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shrunkenmaster
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« Reply #8 on: November 01, 2011, 08:16:34 PM »

Wow, that's a shiny looking board! I have the original Gyruss board schematics if that's of help to anyone (My Gyruss has an intermittent left speaker fault - I have checked all the speaker connections and think it may be one of the two sound chips causing the problem).
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PaulSwan
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« Reply #9 on: November 01, 2011, 10:00:44 PM »

OK, it's a bootleg and it looks like the volume pots and audio caps are in place, though the amps look as if they might have been replaced at some stage.

Do you have any sound at all from the speakers - noise/hiss, with the volume turned up full, that might suggest that at least the audio amps and output is working?

Paul.
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ZZZ
Ron
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Building my first DK cab :-)


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« Reply #10 on: November 01, 2011, 10:41:13 PM »

Thanks Paul,

I think youre right about the amps.
If i turn on the pots to full there is no sound at all.
According to the former owner there was a power shortcut in his cab which caused the damage?
It's a nice looking board but without sound it's useless unfortunately confused
I was hoping it's something minor but i'm afraid it isn't.
I wish i had the technical knowledge  oppps
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PaulSwan
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« Reply #11 on: November 01, 2011, 11:48:18 PM »

Do the amps get hot?
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ZZZ
Laschek
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« Reply #12 on: November 02, 2011, 04:06:17 PM »

Check -5V.
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Ron
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Building my first DK cab :-)


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« Reply #13 on: November 02, 2011, 04:17:20 PM »

Check -5V.

I want to but did not have the knowledge and tools for that  oppps
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Ron
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Building my first DK cab :-)


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« Reply #14 on: November 02, 2011, 07:29:51 PM »

Do the amps get hot?

Hi Paul,

Only the left amp is getting hot.
Is this a good thing?
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