nanao MS8 and scramble screen sync

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bodtx
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nanao MS8 and scramble screen sync

Post by bodtx » September 13th, 2019, 9:31 am

Hi an astro city's friend has some problems to start up the screen, some times it works and sometimes not.

after looking on the board, I've seen this transistor was unsoldered:
IMG_20190911_124632_590.jpg
see the moving transistor on this video :-o https://peervideo.net/videos/watch/eaac ... 9c8d5a8127

after testing it seems to be ok:
photo5967499244522811583.jpg
so I realise this strap:
IMG_20190911_124549_153.jpg
I f I look into the schematics, the strap is good (tested with continuity tester also), the transisor is in bottom left, wuth red color.
Image

now when we light up the screen, yeaaaah it powers up 8-) .... but the image is like this, it was not like this before when we could start the screen:
Image

The scramble image is changing when booting and loading, my friend can recognize the menu.
We did not move the H or V hold buton yet (have to remove the board again)
could the H sync has moved alone or there could be another problem?

thx

needaes
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Joined: October 30th, 2018, 5:23 pm
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Re: nanao MS8 and scramble screen sync

Post by needaes » September 16th, 2019, 8:41 am

just capkit chassis ;) or you can buy one here :

http://www.neo-arcadia.com/forum/viewto ... =9&t=45336


I buy one at Niko, it's a good man ;)

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yosai
280bpm's too slow
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Re: nanao MS8 and scramble screen sync

Post by yosai » September 16th, 2019, 9:55 am

bodtx wrote:
September 13th, 2019, 9:31 am
We did not move the H or V hold buton yet (have to remove the board again)
could the H sync has moved alone or there could be another problem?
thx
I would definitely try the hold before attempting anything else.

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