Rodotron 666a / Sanwa 29E31S Vertical Height Issue

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idc
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Rodotron 666a / Sanwa 29E31S Vertical Height Issue

Post by idc »

I have an issue with my Sanwa 29E31S fitted with a Rodotron 666a chassis.

The vertical height is too tall for the screen, even with the pot on the remote board turned all the way anti-clockwise to its minimum. It's mostly a problem at 15KHz. The picture had always been a little 'tall' at 15KHz, even at its lowest setting, but only a few lines off the top and the bottom. Now, it seems to have suddenly become considerably worse. As an example, I can't get the picture small enough to be able to see both the upper health bars and the lower Super Art gauges in 3rd Strike.

Note that at 31KHz, I'm unsure if the 31KHz picture has become 'taller' in the same manner, since I'm still able to adjust the vertical height to fit the picture in the screen.

Monitors are far from my area of expertise, so can anyone advise me what the problem could be? As I've already turned the vertical height down as low as it will go on the remote board, is there something I can/should adjust on the chassis PCB itself?

Cheers for any advice. :)
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grantspain
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Re: Rodotron 666a / Sanwa 29E31S Vertical Height Issue

Post by grantspain »

there is a resistor to change,R111 replace with 1 ohm
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idc
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Re: Rodotron 666a / Sanwa 29E31S Vertical Height Issue

Post by idc »

Thanks for the tip. Before I go tearing things apart, this is on the main chassis PCB, right?
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grantspain
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Re: Rodotron 666a / Sanwa 29E31S Vertical Height Issue

Post by grantspain »

yes not far from the vertical deflection ic
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