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Author Topic: Jamma to scart tv ?  (Read 9092 times)

Blanbek

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Jamma to scart tv ?
« on: June 02, 2014, 02:01:22 PM »
Hello,

I would like to make a jamma harness to scart tv ?

Is there a correct diagram to do this?

I have one, but I can't seem to have one stabilized picture ?

here is the link where I found the diagram

http://www.arcade-system.com/index.php/articles/36-montage-de-composants-conversions-a-creations/433-supergun-construisez-votre-propre-acade-systeme?start=3

Thanks...
« Last Edit: June 02, 2014, 02:05:22 PM by Blanbek »
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Luigi

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Re: Jamma to scart tv ?
« Reply #1 on: June 02, 2014, 02:24:44 PM »
For my cable I have used this one:

http://www.geocities.ws/podernixie/htpc/cables-en.html

and it worked 'out of the box' :)

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Blanbek

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Re: Jamma to scart tv ?
« Reply #2 on: June 02, 2014, 03:07:55 PM »

I'll give it a try tomorrow, thank you!
And say what....  ::)
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Etienne MacGyver

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Re: Jamma to scart tv ?
« Reply #3 on: June 02, 2014, 04:17:17 PM »
Looks like a sync problem
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Wurstkopp

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Re: Jamma to scart tv ?
« Reply #4 on: June 02, 2014, 04:54:00 PM »
Could be a confused sync pin. They're crossed on the scart-plugs, it's either pin 19 or 20.
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Blanbek

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Re: Jamma to scart tv ?
« Reply #5 on: June 02, 2014, 04:55:35 PM »
On pin20 sync the value of the resistance is different from me, 390ohms and 1k.

My diagram is less complete.

The project is 60in1 pcb jamma to tv



« Last Edit: June 02, 2014, 06:45:06 PM by Blanbek »
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Wurstkopp

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Re: Jamma to scart tv ?
« Reply #6 on: June 02, 2014, 05:54:51 PM »
Done this with quite a few tvs and never needed any resistor.
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DarthNuno

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Re: Jamma to scart tv ?
« Reply #7 on: June 02, 2014, 08:12:43 PM »
Quote from: Wurstkopp on June 02, 2014, 05:54:51 PM
Done this with quite a few tvs and never needed any resistor.

+1

Done this with more than...20 TV, and never needed any resistor too!  8)
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Blanbek

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Re: Jamma to scart tv ?
« Reply #8 on: June 03, 2014, 10:17:47 AM »
Hello,

it works, but then what is the difference with transistors resistors?

the image is a bit on the left side...

« Last Edit: June 04, 2014, 07:12:21 AM by Blanbek »
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Wurstkopp

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Re: Jamma to scart tv ?
« Reply #9 on: June 03, 2014, 10:32:25 AM »
Depending on the tv model you'll have to find out whether there's a service mode (access via remote) or look on the chassis if there's a pot for horizontal shift.
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Blanbek

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Re: Jamma to scart tv ?
« Reply #10 on: June 03, 2014, 11:22:37 AM »
Tv Goldstar CB-20A86 chassis PC53A.

I can not find a correct service mode but I have a .pdf Explains horizontal adjustment " the H shift control VR401 "

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Wurstkopp

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Re: Jamma to scart tv ?
« Reply #11 on: June 03, 2014, 11:45:44 AM »
 ;)
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Luigi

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Re: Jamma to scart tv ?
« Reply #12 on: June 04, 2014, 06:43:13 AM »
What transistors? Or do you mean resistors?

I just can say that I have tried it on a Grundig TV and I had sync issues without the resistor.
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Blanbek

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Re: Jamma to scart tv ?
« Reply #13 on: June 04, 2014, 07:36:07 AM »
Quote from: Blanbek on June 03, 2014, 10:17:47 AM
Hello,

it works, but then what is the difference with transistors resistors?

the image is a bit on the left side...



I did not take any risks, I did the wiring with resistors
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level42

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Re: Jamma to scart tv ?
« Reply #14 on: June 04, 2014, 06:20:41 PM »
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