Sega Blast City: garbled/distorted screen

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Magicalbottle
Posts: 155
Joined: Sat Sep 20, 2008 1:19 pm
Location: The Netherlands

Sega Blast City: garbled/distorted screen

Post by Magicalbottle »

I'm having trouble fixing this issue, sound is OK, but screen is all distorted running all over the place.

Anyone know where to set the hori/vertical hold or is it a 5v issue? I have a Toki pcb connected.
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mikejmoffitt
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Location: Tokyo, Japan

Re: Sega Blast City: garbled/distorted screen

Post by mikejmoffitt »

V hold isn’t adjustable, but there is a pot on the chassis labeled H.H15 on the MS-2930. For the later models, you want the secret menu.


For the 2930 make sure you are in 15KHz mode too, with the remote DIPs reading OFF-ON-OFF.
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Magicalbottle
Posts: 155
Joined: Sat Sep 20, 2008 1:19 pm
Location: The Netherlands

Re: Sega Blast City: garbled/distorted screen

Post by Magicalbottle »

I checked the DIP settings and they are correct.

How exactly do I adjust the 5v on the PSU? These don't work with a screwdriver.
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