How can I set the Monitor Frequency from 31khz to 15khz?

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OldFoo

How can I set the Monitor Frequency from 31khz to 15khz?

Post by OldFoo » Thu Apr 26, 2012 2:47 pm

Hi all,



I have Blastcity Cabinet with a Toshiba Monitor A68LBT696X4I ans Sanwa Electronics.

Actually, the frequency setting of my monitor are on 31KHz .

I need to change those settings to 15KHz, ideal resolution for 2d games.

Can you please give me a detailed process of what to do to change the setting?



Thanks in advance!



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OldFoo

Post by OldFoo » Tue Jun 19, 2012 1:28 pm

Could you sort it out yet? This isent an original Blastcity tube, could it be that it is 31khz only? can you post a pic of the monitor's controlpanel?

OldFoo

Post by OldFoo » Tue Jun 19, 2012 4:35 pm

typically you don't set a monitor for refresh rate. Normally it'll either accept the signal or it won't. a lot of newer monitors just don't accept anything below the 31KHz. Someone please correct me if I'm wrong (seriously, that isn't sarcastic).



yours should auto detect:



http://www.arcadespareparts.com/arcade_ ... 13254.html



http://www.arcade-game-sales.com/produc ... 372-1.html



"H.Frequency: 3-mode (15/24/31khz), auto"

OldFoo

Post by OldFoo » Tue Jun 19, 2012 7:09 pm

It "can" autodetect, this depends on the chassis in usage, if it dosent you should be able to set the freqency manually on the CP of the Chassis. Otherwise it' a chassis designed for only 31khz BUT compatible with the Tube, because the Tube can manage trisync. Plz try to post a Pic of the CP.

OldFoo

Post by OldFoo » Sun Jun 24, 2012 9:15 pm

Check the remote board for the monitor under the CP. I have a Blast as well. If you do not have the digital chassis (with On Screen Display), there will be a small dipswitch under the CP, on the remote board for the monitor (on which you set contrast, H-sync, etc). It is on the right of the small PCB, and there should be a sticker in the bottom half of the CP telling you how to set the dipswitch for 15k.



The Blast city cabs all have a tri-sync chassis (MS2930 or MS2931)

OldFoo

Post by OldFoo » Sun Jun 24, 2012 9:43 pm

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OldFoo

Post by OldFoo » Sun Jun 24, 2012 9:44 pm

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OldFoo

Post by OldFoo » Sun Jun 24, 2012 10:17 pm

Ah, the monitor (or at least the chassis) is not original anymore, as you can see from the mismatch in the schematic versus the remote board.



Most probably a 31khz-only screen, meaning you cannot switch to 15khz. Someone here might recognize the specific Sanwa chassis and have more info. I don't :-)



If nobody chimes in, contact Craig at giz10p.

OldFoo

Post by OldFoo » Mon Jun 25, 2012 5:43 pm

Cageman wrote:Ah, the monitor (or at least the chassis) is not original anymore, as you can see from the mismatch in the schematic versus the remote board.



Most probably a 31khz-only screen, meaning you cannot switch to 15khz. Someone here might recognize the specific Sanwa chassis and have more info. I don't :-)



If nobody chimes in, contact Craig at giz10p.


thank you ;)

wnai
Posts: 1
Joined: Thu Jun 28, 2018 6:04 am

Re: How can I set the Monitor Frequency from 31khz to 15khz?

Post by wnai » Thu Jun 28, 2018 6:06 am

i acquired a blast city yesterday with the same chasis.

it will show video that comes in over a jamma harness from the original taito X2, but it will not show video that is coming in directly via the VGA port.

any ideas?

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