Author Topic: Need help with a Gyruss PCB  (Read 13346 times)

Ron

  • Jr. Member
  • *
  • Posts: 47
  • Building my first DK cab :-)
    • View Profile
    • Ronsblog
Need help with a Gyruss PCB
« 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

PaulSwan

  • ArcadeLifeStyler'
  • ***
  • Posts: 773
  • ZZZ
    • View Profile
    • The Zaccaria WWW Site
Re: Need help with a Gyruss PCB
« Reply #1 on: October 31, 2011, 09:52:28 PM »
Post a good picture of your complete top (sound) board.
Paul.
ZZZ

Robinholland

  • Member
  • **
  • Posts: 494
    • View Profile
Re: Need help with a Gyruss PCB
« Reply #2 on: October 31, 2011, 09:54:42 PM »
Do you have 12 volt for the amp on board ?

Ron

  • Jr. Member
  • *
  • Posts: 47
  • Building my first DK cab :-)
    • View Profile
    • Ronsblog
Re: Need help with a Gyruss PCB
« 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.

Ron

  • Jr. Member
  • *
  • Posts: 47
  • Building my first DK cab :-)
    • View Profile
    • Ronsblog
Re: Need help with a Gyruss PCB
« Reply #4 on: October 31, 2011, 10:10:05 PM »
Do you have 12 volt for the amp on board ?

Yes, i have.

Ron

  • Jr. Member
  • *
  • Posts: 47
  • Building my first DK cab :-)
    • View Profile
    • Ronsblog

Etienne MacGyver

  • ArcadeLifeStyler'
  • ***
  • Posts: 7607
  • The Netherlands
    • View Profile
Re: Need help with a Gyruss PCB
« Reply #6 on: November 01, 2011, 07:21:17 PM »
let me help you  ;)




Ron

  • Jr. Member
  • *
  • Posts: 47
  • Building my first DK cab :-)
    • View Profile
    • Ronsblog
Re: Need help with a Gyruss PCB
« Reply #7 on: November 01, 2011, 07:46:05 PM »
Thanks, Etienne  :D

shrunkenmaster

  • Jr. Member
  • *
  • Posts: 56
    • View Profile
Re: Need help with a Gyruss PCB
« 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).

PaulSwan

  • ArcadeLifeStyler'
  • ***
  • Posts: 773
  • ZZZ
    • View Profile
    • The Zaccaria WWW Site
Re: Need help with a Gyruss PCB
« 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.
ZZZ

Ron

  • Jr. Member
  • *
  • Posts: 47
  • Building my first DK cab :-)
    • View Profile
    • Ronsblog
Re: Need help with a Gyruss PCB
« 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 :?
I was hoping it's something minor but i'm afraid it isn't.
I wish i had the technical knowledge  :oops:

PaulSwan

  • ArcadeLifeStyler'
  • ***
  • Posts: 773
  • ZZZ
    • View Profile
    • The Zaccaria WWW Site
Re: Need help with a Gyruss PCB
« Reply #11 on: November 01, 2011, 11:48:18 PM »
Do the amps get hot?
ZZZ

Laschek

  • Guest
Re: Need help with a Gyruss PCB
« Reply #12 on: November 02, 2011, 04:06:17 PM »
Check -5V.

Ron

  • Jr. Member
  • *
  • Posts: 47
  • Building my first DK cab :-)
    • View Profile
    • Ronsblog
Re: Need help with a Gyruss PCB
« 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  :oops:

Ron

  • Jr. Member
  • *
  • Posts: 47
  • Building my first DK cab :-)
    • View Profile
    • Ronsblog
Re: Need help with a Gyruss PCB
« 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?