Dragon's Lair Fans - Arcade Lifestyle

General Chat => Arcade Lifestyle => Topic started by: Ron on October 31, 2011, 09:12:15 PM

Title: Need help with a Gyruss PCB
Post by: Ron 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 :?
I'm a really noob when it comes to electronics :wink:
Hope somebody can help me out with this or knows somebody who can.

Thanks in advance

Ron
Title: Re: Need help with a Gyruss PCB
Post by: PaulSwan on October 31, 2011, 09:52:28 PM: Post a good picture of your complete top (sound) board.
Paul.
Title: Re: Need help with a Gyruss PCB
Post by: Robinholland on October 31, 2011, 09:54:42 PM: Do you have 12 volt for the amp on board ?
Title: Re: Need help with a Gyruss PCB
Post by: Ron on October 31, 2011, 10:09:23 PM: Quote from: PaulSwan on October 31, 2011, 09:52:28 PM
Post a good picture of your complete top (sound) board.
Paul.
I will do that tomorrow.
Thanks Paul.
Title: Re: Need help with a Gyruss PCB
Post by: Ron on October 31, 2011, 10:10:05 PM: Quote from: Robinholland on October 31, 2011, 09:54:42 PM
Do you have 12 volt for the amp on board ?

Yes, i have.
Title: Re: Need help with a Gyruss PCB
Post by: Ron on November 01, 2011, 06:31:03 PM: Added a photo of the board.

https://picasaweb.google.com/109956512574431177388/1November2011?authkey=Gv1sRgCKOug--zsLqRYA# (https://picasaweb.google.com/109956512574431177388/1November2011?authkey=Gv1sRgCKOug--zsLqRYA#)
Title: Re: Need help with a Gyruss PCB
Post by: Etienne MacGyver on November 01, 2011, 07:21:17 PM: let me help you ;)

(https://lh6.googleusercontent.com/-zhdhqx67-N8/TrAr0Xr8n8I/AAAAAAAAADU/-eDfZvUHJGA/s720/Gyruss%252520001.JPG)

(https://lh3.googleusercontent.com/-g0ymQcwzJNo/TrAr0wpXURI/AAAAAAAAADE/YUyTQCXHUng/s720/Gyruss%252520004.JPG)
Title: Re: Need help with a Gyruss PCB
Post by: Ron on November 01, 2011, 07:46:05 PM: Thanks, Etienne :D
Title: Re: Need help with a Gyruss PCB
Post by: shrunkenmaster 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).
Title: Re: Need help with a Gyruss PCB
Post by: PaulSwan 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.
Title: Re: Need help with a Gyruss PCB
Post by: Ron 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 :?
I was hoping it's something minor but i'm afraid it isn't.
I wish i had the technical knowledge :oops:
Title: Re: Need help with a Gyruss PCB
Post by: PaulSwan on November 01, 2011, 11:48:18 PM: Do the amps get hot?
Title: Re: Need help with a Gyruss PCB
Post by: Laschek on November 02, 2011, 04:06:17 PM: Check -5V.
Title: Re: Need help with a Gyruss PCB
Post by: Ron on November 02, 2011, 04:17:20 PM: Quote from: Laschek on November 02, 2011, 04:06:17 PM
Check -5V.

I want to but did not have the knowledge and tools for that :oops:
Title: Re: Need help with a Gyruss PCB
Post by: Ron on November 02, 2011, 07:29:51 PM: Quote from: PaulSwan on November 01, 2011, 11:48:18 PM
Do the amps get hot?

Hi Paul,

Only the left amp is getting hot.
Is this a good thing?
Title: Re: Need help with a Gyruss PCB
Post by: PaulSwan on November 02, 2011, 08:25:20 PM: They would usually be the same - hot as in burning hot?

I'd suggest that you download the manual/schematics and then if you have a multimeter you can check the amp's power and connectivity. I can't remember if this PCB has a strapping option for stereo to mono for normal cabs, or if the bootleg has this arranged differently from the original PCB.

Paul.
Title: Re: Need help with a Gyruss PCB
Post by: Ron on November 02, 2011, 08:40:52 PM: Yes, hot like in - burning.

I already had the schematics and the amps are getting power (my father has looked at it with a multimeter a while ago).
Well, i appreciate your help but i think i can't do any more.
I have no technical background to dig further in the schematics.
Maybe i have to look for a replacement of the soundboard.
Title: Re: Need help with a Gyruss PCB
Post by: Etienne MacGyver on November 02, 2011, 09:08:45 PM: Here is one for 90$

http://www.ebay.de/itm/GYRUSS-KONAMI-CLASSIC-ARCADE-CIRCUIT-BOARD-PCB-TESTED-WORKING-/170704744317?pt=LH_DefaultDomain_0&hash=item27becbaf7d (http://www.ebay.de/itm/GYRUSS-KONAMI-CLASSIC-ARCADE-CIRCUIT-BOARD-PCB-TESTED-WORKING-/170704744317?pt=LH_DefaultDomain_0&hash=item27becbaf7d)
Title: Re: Need help with a Gyruss PCB
Post by: Belike on November 02, 2011, 11:03:01 PM: Quote from: Etienne on November 02, 2011, 09:08:45 PM
Here is one for 90$

http://www.ebay.de/itm/GYRUSS-KONAMI-CLASSIC-ARCADE-CIRCUIT-BOARD-PCB-TESTED-WORKING-/170704744317?pt=LH_DefaultDomain_0&hash=item27becbaf7d (http://www.ebay.de/itm/GYRUSS-KONAMI-CLASSIC-ARCADE-CIRCUIT-BOARD-PCB-TESTED-WORKING-/170704744317?pt=LH_DefaultDomain_0&hash=item27becbaf7d)
Beware of the edge connector pins, looks like in very bad condition. ::)