Only one way to find outThe only gotcha I found with the crystals around now is that their maximum input current is 5 mA lower than the one being used but never got an answer if that mattered.
On the 10MHz crystal that I looked up that is on my A boards it is rated to 35mA max current I believe and the ones you can obtain off digikey/mouser only one was rated to 30mA max and the rest were lower.What tolerance does it make? If it's 5mA on 50 then you're good to go.
And it doesn't mean you need 35mA. Maybe 10mA works too but Capcom just fitted what crystal was available at manufacturing time.On the 10MHz crystal that I looked up that is on my A boards it is rated to 35mA max current I believe and the ones you can obtain off digikey/mouser only one was rated to 30mA max and the rest were lower.
Is this what were looking at as a suitable replacement?And it doesn't mean you need 35mA. Maybe 10mA works too but Capcom just fitted what crystal was available at manufacturing time.I've installed 12Mhz crystals before, never looked at the ratings and never had any issue so tolerance must be quite high.On the 10MHz crystal that I looked up that is on my A boards it is rated to 35mA max current I believe and the ones you can obtain off digikey/mouser only one was rated to 30mA max and the rest were lower.
I picked up a few of those. Unfortunately the board I'm testing with doesn't boot with it installed, even though the pinout appears to be correct. Not sure what's going on, really.Is this what were looking at as a suitable replacement?And it doesn't mean you need 35mA. Maybe 10mA works too but Capcom just fitted what crystal was available at manufacturing time.I've installed 12Mhz crystals before, never looked at the ratings and never had any issue so tolerance must be quite high.On the 10MHz crystal that I looked up that is on my A boards it is rated to 35mA max current I believe and the ones you can obtain off digikey/mouser only one was rated to 30mA max and the rest were lower.
https://nz.rs-online.com/web/p/crystal-oscillators/7675294/
Well, apparently the dash board I've just tried it on must have become faulty at some point, because now it only plays blind. A bit of a bar of colour flickers at the top of the screen occasionally, so maybe it's some sync issue.I've never bothered looking at the characteristics in details. I just order whatever active 12Mhz crystal is available and it has always worked for me.
Might depend how well other components on the board can support overclocking (mainly thinking of RAM chips).
@fluxcore I would test the crystal on a dash board.
Well the oscillators are the clock signals to the cpu and the rest of the board so they aren't insignificant. To put an idea to them the crystals are the war drum that controls the forefront.I think these crystals are inadequate somehow.I've never bothered looking at the characteristics in details. I just order whatever active 12Mhz crystal is available and it has always worked for me.
Might depend how well other components on the board can support overclocking (mainly thinking of RAM chips).
@fluxcore I would test the crystal on a dash board.