MV-1C consolization question

Nostromo

Nostromo

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I am about to consolize an MV-1C - got a few questions...

1. I am gonna pass audio through scart - is there a way to make it "tv safe" (voltage might be too high?)?

2. I read somewhere that 12v is not needed for the 2 slot - what about MV-1C?

3. Some TVs dont switch to RGB mode unless the voltage is 3v (as opposed to 5v). What resistor do I need t drop voltage from 5v to 3v?

4. If I remove the black plastic cover, will carts insert securely or it will be a bit wobbly?

Thanks :smirk:
 
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Xian Xi

Xian Xi

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Nostromo said:
I am about to consolize an MV-1C - got a few questions...

1. I am gonna pass audio through scart - is there a way to make it "tv safe" (voltage might be too high?)?

2. I read somewhere that 12v is not needed for the 2 slot - what about MV-1C?

3. Some TVs dont switch to RGB mode unless the voltage is 3v (as opposed to 5v). What resistor do I need t drop voltage from 5v to 3v?

4. If I remove the black plastic cover, will carts insert securely or it will be a bit wobbly?

Thanks :smirk:
Click to expand...

I sent you an email.

1. If you remove the audio amp you only need 5v.

2. See above.

3. The 3v it is referring to is the line voltage coming from the G or synce line which I beileve is 3.3v not 5v.

4. The game wont be wobbly at all unless you have a loose cart.
 
Nostromo

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Thanks a lot for the info!

How much ohms does a resistor has to be to drop 5v to 3.3v?

Thanks!
 
Xian Xi

Xian Xi

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Nostromo said:
Thanks a lot for the info!

How much ohms does a resistor has to be to drop 5v to 3.3v?

Thanks!
Click to expand...

The line is already at 3.3v
 
Nostromo

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I am in Europe, we use an RGB/Scart connector... for sync I need to feed 3.3volts to the TV but the psu outputs 5v... so I have to drop it to 3.3... am I right?
 
Xian Xi

Xian Xi

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Nostromo said:
I am in Europe, we use an RGB/Scart connector... for sync I need to feed 3.3volts to the TV but the psu outputs 5v... so I have to drop it to 3.3... am I right?
Click to expand...

You're confusing yourself. The PSU outputs 5v to power the unit but the sync outputs 3.3v to the TV via the SCART. You dont have to change any voltage.
 
Nostromo

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Xian Xi said:
You're confusing yourself. The PSU outputs 5v to power the unit but the sync outputs 3.3v to the TV via the SCART. You dont have to change any voltage.
Click to expand...

Well yeah, and when am I going to get the 3.3v from? :) I am using a mini PSU thingy which only outputs 5v + 12v... so the 5v has to be dropped to 3.3volts :)
 
Xian Xi

Xian Xi

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Dude you're making me laugh. :lolz:

The sync already outputs 3.3v, just because the PSU is pushing 5v doesnt mean that everything is gonna output 5v. If you want you can check it yourself with a multimeter, you will see that the sync outputs 3.3v.

If you are asking where the sync is it is Jamma pin P
 
Nostromo

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Xian Xi said:
Dude you're making me laugh. :lolz:

The sync already outputs 3.3v, just because the PSU is pushing 5v doesnt mean that everything is gonna output 5v. If you want you can check it yourself with a multimeter, you will see that the sync outputs 3.3v.

If you are asking where the sync is it is Jamma pin P
Click to expand...


Oh yeah you are right :) OOOoops.

I meant pin 16 of on the scart cable. It needs 3 volts or so otherwise certain TV sets wont go in RGB mode ^-^

I read somewhere on another thread is that all I have to do is connect 5v to pin 16 via a 100 ohm resistor :)
 
MKL

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Nostromo, the blanking signal on pin 16 of the scart needs 1-3v (not 3.3v) to switch the TV to RGB mode. You can easily get that kind of voltage values by putting a 100ohm resistor in series with the 5v line to pin 16.

Sometimes, when a power pin is not present (e.g. in a VGA cable) it's possible to use the sync for the same purpose but the above method is obviously preferable.
 
Xian Xi

Xian Xi

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I think MKL or toooddddy know way more about this than I do.


I dont know anything about SCART. :crying:
 
Nostromo

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Xian Xi said:
I think MKL or toooddddy know way more about this than I do.


I dont know anything about SCART. :crying:
Click to expand...

RGBSCART > Svideo, composite ;)
 
Xian Xi

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MKL said:
Nostromo, the blanking signal on pin 16 of the scart needs 1-3v (not 3.3v) to switch the TV to RGB mode. You can easily get that kind of voltage values by putting a 100ohm resistor in series with the 5v line to pin 16.

Sometimes, when a power pin is not present (e.g. in a VGA cable) it's possible to use the sync for the same purpose but the above method is obviously preferable.
Click to expand...


Thanks for clearing that up. ;)
 
MKL

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ttooddddyy said:
MKL is the King of SCART :)
Click to expand...

In Italian scart sounds like the word for trash/discarded thing so i like your definition ;)
 
MKL

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anyone misread it as king of SCAT? :spock:
 
retronerd

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Consolise mv-1C

I have some questions! I just bought an mv1c PCB. And an hammond case.

1: if i do the stereo mod which caps is no longer nessesary?

2: do i still need the heatsink and the thing mounted to that?
Thanks
 
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