Gholus and Ghost Bootleg No sync Sync

PCB problems and fixes
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gnomx
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Gholus and Ghost Bootleg No sync Sync

Post by gnomx »

Hi there.
I've got a Jamma board Bootleg titled Ghouls and Ghost.
I have a problem with video sync.
Audio works perfectly.
Here a video :
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mastercello
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Re: Gholus and Ghost Bootleg No sync Sync

Post by mastercello »

To me it looks like video gnd is missing - common on many jamma bootleg pcb (check connection between gnd pin (1,2,27,28) and video gnd pin (14) on the pcb)
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gnomx
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Re: Gholus and Ghost Bootleg No sync Sync

Post by gnomx »

mastercello wrote:
July 27th, 2019, 12:55 pm
To me it looks like video gnd is missing - common on many jamma bootleg pcb (check connection between gnd pin (1,2,27,28) and video gnd pin (14) on the pcb)
I've checked there is connection between them.
Pin 14 is grounded.
Now I'm gonna make a wire between Pin 14 and 1/2.

Edit : by grounding this no fix... still same problem
Any help??
This is my pcd detailed pic :
Image
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Re: Gholus and Ghost Bootleg No sync Sync

Post by gnomx »

Anybody can help me?
In gonna connect it at My personal cabinet and watch if works correctly. Maybe there is a gnd problem on my home made supergun.
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Re: Gholus and Ghost Bootleg No sync Sync

Post by gnomx »

No Works.
I've tried to connect to my jamma cabinet but it still out of sync.
Vary bad news....
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yosai
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Re: Gholus and Ghost Bootleg No sync Sync

Post by yosai »

Have you tried adjusting the sync on your cab or the TV?
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gnomx
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Re: Gholus and Ghost Bootleg No sync Sync

Post by gnomx »

yosai wrote:
July 28th, 2019, 5:58 pm
Have you tried adjusting the sync on your cab or the TV?
Yes of course.
I have tri frequency monitor and it shows me on video waiting signal and video still out of sync.
Maybe oscillator faulty??
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Zebius
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Re: Gholus and Ghost Bootleg No sync Sync

Post by Zebius »

Many CPS1 bootlegs have a weak SYNC signal, read this repair log for a possible solution:
http://www.arcadeitalia.net/viewtopic.php?f=57&t=20810
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Re: Gholus and Ghost Bootleg No sync Sync

Post by yosai »

gnomx wrote:
July 28th, 2019, 6:14 pm
yosai wrote:
July 28th, 2019, 5:58 pm
Have you tried adjusting the sync on your cab or the TV?
Yes of course.
I have tri frequency monitor and it shows me on video waiting signal and video still out of sync.
Maybe oscillator faulty??
I was referring to the 15k horizontal hold adjustment on the chassis.
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Re: Gholus and Ghost Bootleg No sync Sync

Post by gnomx »

yosai wrote:
July 28th, 2019, 9:40 pm
gnomx wrote:
July 28th, 2019, 6:14 pm
yosai wrote:
July 28th, 2019, 5:58 pm
Have you tried adjusting the sync on your cab or the TV?
Yes of course.
I have tri frequency monitor and it shows me on video waiting signal and video still out of sync.
Maybe oscillator faulty??
I was referring to the 15k horizontal hold adjustment on the chassis.
Hey bro.
I know it. I have experience in this. Don't worry.
Here the problem isn't fix by setting horizontal Freq is other story. Some faulty components or bad graunded points
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gnomx
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Re: Gholus and Ghost Bootleg No sync Sync

Post by gnomx »

Zebius wrote:
July 28th, 2019, 9:27 pm
Many CPS1 bootlegs have a weak SYNC signal, read this repair log for a possible solution:
http://www.arcadeitalia.net/viewtopic.php?f=57&t=20810
Didn't work.
:(
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Re: Gholus and Ghost Bootleg No sync Sync

Post by gnomx »

I take It to my personal technical. I hope he can fix it.
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