Question VGA image error ZJ050NA 08C

Fly_5

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Hello, I am trying to get VGA output from the Ps2 model 90004 and I get the image displaced I have connected all the cables (I think) that in place, but I think there is something that I left that makes the image is not centered, someone could help me? greetings
IMG_1102.JPG
IMG_1103.JPG
IMG_1104.JPG
 
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Have you tried grabbing the H and V sync from pins 22 and 21 on the other side of the DAC? The logic level on the input side is only 1.2 volts.
 
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Might be a good idea to use resistors on them as well, 75Ω should suffice, same as ones on the RGB lines
 

Fly_5

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thank you very much for helping me I will follow your advice and report back to you.
 

Fly_5

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Have you tried grabbing the H and V sync from pins 22 and 21 on the other side of the DAC? The logic level on the input side is only 1.2 volts.

Do you mean to take the H and V points directly from pins 22 and 21 of the video DAC ?
 

Fly_5

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"H" in PIN 22 and "V" in PIN 21 ? are you sure ?
 
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Pretty sure, but you can look on page 11 of the 70000 service manual for confirmation.
 

Fly_5

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My board is a 90004 but it has the same video DAC, I'm going to take out those points and put a 75 ohm interleaved resistor on it.
 

Fly_5

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IMG_1107.jpeg

Is it ok like this ?
 

Fly_5

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I tried it and it doesn't work either
 
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That's a bummer. Sorry I wasn't able to help. Only thing I can suggest is trying to use C-Sync to get the H and V signals. A guy who called himself Ashen on the old ModRetro forum did it like that years ago.
 

Fly_5

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It is off-centre in the ps2 menu but in the opl menu I can configure it and I can centre it. I don't understand why in the ps2 menu it is offset.
 
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I don’t know where I saw a post but they used the lcd button controller to enter menu then reset settings it might re adjust the display.
 

Fly_5

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Enter the menu but there is no reset option.
 
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Is there an option to adjust the h or v, can you post picture of screen menu
 
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