How to make video cable for my GBS 8200 (RGB-VGA converter)

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Van -Neo-

Champion (384)

afbeelding van -Neo-

04-11-2015, 15:45

I see green blocks on the screen with some recognizable parts of what is on display and the screen is frozen. It's a gbs 8220 to be exact.

Van DamnedAngel

Master (187)

afbeelding van DamnedAngel

04-07-2016, 18:55

+Raymond,

Are you still experiencing the waves?

Chances are that you power supply has more ripple that it should. What power supply are you using? Have you tried with other units?

best,
DA

Van raymond

Champion (456)

afbeelding van raymond

04-07-2016, 19:32

DamnedAngel wrote:

+Raymond,

Are you still experiencing the waves?

Chances are that you power supply has more ripple that it should. What power supply are you using? Have you tried with other units?

best,
DA

Yes, I still have the waves. No, I have not tried a different power supply. I will give it a try in my holiday and let you know, thanks for the tip!

Van DamnedAngel

Master (187)

afbeelding van DamnedAngel

04-07-2016, 20:57

Just for you to know, I just installed the GBS-8200 in my MSX-1 (Gradiente Expert). Firstly I tried Expert's internal power supply (5V) and it gave me waves as well. I then replaced it for an external Linksys 12V power supply (from a dead router - exact same connector and polarity! Yes!) and it is now just perfect.

I should start to think to place my Expert's power supply with a newer, more modern one... Big smile

Wish you luck! Let me know the outcome!

best,

Van tvalenca

Paladin (747)

afbeelding van tvalenca

04-07-2016, 21:14

DamnedAngel wrote:

Just for you to know, I just installed the GBS-8200 in my MSX-1 (Gradiente Expert). Firstly I tried Expert's internal power supply (5V) and it gave me waves as well. I then replaced it for an external Linksys 12V power supply (from a dead router - exact same connector and polarity! Yes!) and it is now just perfect.

I should start to think to place my Expert's power supply with a newer, more modern one... Big smile

Wish you luck! Let me know the outcome!

best,

Just checking: did you tried internal 12V supply? (from one of the pins on the Expert's RGB port, not sure which)

Van DamnedAngel

Master (187)

afbeelding van DamnedAngel

04-07-2016, 22:07

tvalenca wrote:

did you tried internal 12V supply?

Nope. Tried with 5V supplied to the digital board. That's the one which apparently has a considerable ripple, from the interferences in LCD screen (can't be 100% sure of that, since I don't have an oscilloscope).

Van tvalenca

Paladin (747)

afbeelding van tvalenca

04-07-2016, 22:28

DamnedAngel wrote:

Nope. Tried with 5V supplied to the digital board. That's the one which apparently has a considerable ripple, from the interferences in LCD screen (can't be 100% sure of that, since I don't have an oscilloscope).

Say that did a awful job on Expert PSU is quite generous... That piece of junk can't be considered "ok" even if someone rebuild it from scratch. Seriously, I can't think on anything worse.

Ok, Maybe Hotbit's PSU, which contains only juice enough to power the computer, if you need to power anything it overloads.

Van ~mk~

Master (248)

afbeelding van ~mk~

10-07-2016, 21:45

-Neo- wrote:

On my Turbo-R GT it works fine in 60Hz, it doesn't though when I switch to 50Hz. Strange as I assume Raymonds'Philips runs in 50Hz by default.

This is so strange, I have the opposite problem.
I built the RGB cable for my Sanyo Wavy 23 (r,g,b and sync signals) and plugged it into the GBS 8220 V3.0 board.
At native 60 hz I get a picture, but every 60 seconds or so (it's not consistent) the GBS reports no input signal for 1 second and then the image comes back immediately, and after a while is gone again, etc.
If I switch to 50 hz the input signal is never lost.
Does anyone understand what might be going on?
I assumed it was GBS 8220's fault but now that I've read -Neo-'s message I'm puzzled.

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