MV-1C consolization question

retronerd

retronerd

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Thanks! when i do the stereo mod, can i still use the mono sound from the jamma connector?
 
mikejmoffitt

mikejmoffitt

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No. The mono sound comes from a mix from the pre-amp going to the power amplifier. If you want mono, pull stereo properly and mix it down to mono outside the unit.
 
retronerd

retronerd

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I get som High annoying noise specially on the test screen if i dont have an cartridge inserted, can this be fixed?
 
Xian Xi

Xian Xi

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retronerd said:
I get som High annoying noise specially on the test screen if i dont have an cartridge inserted, can this be fixed?
Click to expand...

Either increase the size of your ground wires or lower the brightness of the video output.
 
Neo Alec

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Xian, you mentioned in another thread that if you use the same ground for audio and video, it can be noisy, so you like pull the audio and video ground from opposite ends of the board. Where do you recommend tapping audio and video ground from?

What about if I just want to use a standard Neo Geo 8-pin DIN for A/V? in that case, audio and video have to share ground. Is one then doomed to a noisy video signal?
 
Xian Xi

Xian Xi

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Neo Alec said:
Xian, you mentioned in another thread that if you use the same ground for audio and video, it can be noisy, so you like pull the audio and video ground from opposite ends of the board. Where do you recommend tapping audio and video ground from?

What about if I just want to use a standard Neo Geo 8-pin DIN for A/V? in that case, audio and video have to share ground. Is one then doomed to a noisy video signal?
Click to expand...

Nah, I learned from MKL that ground is ground. The noise problem I was having was from a bad cap on the board not filtering as it should have been. I just connect them all together and use a single ground point, just make sure the wire is big enough, I usually use a minimum of 22awg.
 
retronerd

retronerd

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Ive only connect ground to pin 18 is that enough?

MsEY1gW.png
 
Xian Xi

Xian Xi

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It's fine as long as all the other grounds are connected to 18.
 
Xian Xi

Xian Xi

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retronerd said:
An CRT TV European RGB.
Click to expand...

If it's a SCART tv then you only need one ground since they're all connected. Noise is most likely from the video being too bright. Add more resistance to the RGB lines. 75/100ohm should be fine.
 
retronerd

retronerd

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Thanks! Seems to work:)

One more question! Im going to do the battery mod, is it just to desolder these three components and solder a new CR2032 battery?
I8ViF6v.jpg
 
Last edited:
aha2940

aha2940

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I believe you just need to remove D5, that would disable the charging circuit effectively. Removing the rest of the components will not make it any more disconnected.
 
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