no sound on mv 2f but sound test ok? help!
- Thread starter jago
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Reset the backup RAM and try it again.
If that's not it then there's a problem between the slot and the sound subsystem.
RJ
If that's not it then there's a problem between the slot and the sound subsystem.
RJ
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If the sound test works then there is no problem between the digital section of the sound system through the audio amp section, and out to the speakers.
You have a problem between the cart and the YM2610 chip. Most likely culprits: Dirty cart/slots or a bad trace.
RJ
You have a problem between the cart and the YM2610 chip. Most likely culprits: Dirty cart/slots or a bad trace.
RJ
ok i will try but i need to know what pin from the cart connector go to what pin of chip?
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BB,
That's not it. It's working with the audio test so the amplifier section is working. Since he's not getting a Z80 error that leaves a problem somewhere else.
RJ
I have same problem on mv2fs:
6116 was removed by someone, i put a new one and hardware test pass.
Then sound test works, but i get no sound from game at any slot (1 or 2).
Which chip to look at ? Near the Z80 (SM1 section) ?
Aren't the neog0, neoe0 or neo257 chip between the cart and the audio part ?
Nobody has some schematics ?
Anyway i found intesting information about the neog0 here: http://newlifegames.net/nlg/index.php?topic=152.20 thanks !
edit: is there any pinout of the game cartridge to know which signals are link to audio ?
6116 was removed by someone, i put a new one and hardware test pass.
Then sound test works, but i get no sound from game at any slot (1 or 2).
Which chip to look at ? Near the Z80 (SM1 section) ?
Aren't the neog0, neoe0 or neo257 chip between the cart and the audio part ?
Nobody has some schematics ?
Anyway i found intesting information about the neog0 here: http://newlifegames.net/nlg/index.php?topic=152.20 thanks !
edit: is there any pinout of the game cartridge to know which signals are link to audio ?
Last edited:
SetaSouji??
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Have you tried replacing the wiring from the speaker to the JAMMA? Damaged wiring would do that.
Seems that neo257 purpose is to select signal of the current cartridge.
The select pin (17) is 0 for cart0 and 1 for cart1 then all output signal are the one from the corresponding cartridge.
I tested all the signal and this chip seems to works.
any information how all the sound chips are working together could help me.
does someone has some pinouts of the yahama chip ?
Note that the z80 gets it 4 mhz and the 24 mhz crystal works, but there is a 32 khz crytal on the board and i get no freq from it using my multimeter. does someone known his purpose ?
The select pin (17) is 0 for cart0 and 1 for cart1 then all output signal are the one from the corresponding cartridge.
I tested all the signal and this chip seems to works.
any information how all the sound chips are working together could help me.
does someone has some pinouts of the yahama chip ?
Note that the z80 gets it 4 mhz and the 24 mhz crystal works, but there is a 32 khz crytal on the board and i get no freq from it using my multimeter. does someone known his purpose ?
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Stop... OK?
You are trying to shotgun a VERY narrow problem. The 32KHz crystal has NOTHING to do with this sound problem. It's what runs the clock/calendar chip. If it were bad you would have a Calendar Error or the system would be stuck on a green screen when trying to boot.
If you get sound from the test screens then your Z80, 6116, YM2610, and the amplifier sections are ALL WORKING FINE.
First step: Clean the carts and slots!
After that: reset the backup RAM and if that's not it then check for damaged traces between the slots and the chipset chips. Beyond that, you may have a bad chipset chip such as a NEO-257.
RJ
You are trying to shotgun a VERY narrow problem. The 32KHz crystal has NOTHING to do with this sound problem. It's what runs the clock/calendar chip. If it were bad you would have a Calendar Error or the system would be stuck on a green screen when trying to boot.
If you get sound from the test screens then your Z80, 6116, YM2610, and the amplifier sections are ALL WORKING FINE.
First step: Clean the carts and slots!
After that: reset the backup RAM and if that's not it then check for damaged traces between the slots and the chipset chips. Beyond that, you may have a bad chipset chip such as a NEO-257.
RJ
I have clean one more time, and it doesn't change anything. I don't get any dust when i clean it anymore...
I have reset the backup RAM and it doesn't change anything.
I didn't find any damaged trace. Some looks like a little bit dirty (like corroded). For ex pin 52 of neo 257. But if i put a cartridge in 2nd slot, i can see some signals (using a multimeter in frequency mode).
there are some others traces that look not clean, but not damaged.
I have reset the backup RAM and it doesn't change anything.
I didn't find any damaged trace. Some looks like a little bit dirty (like corroded). For ex pin 52 of neo 257. But if i put a cartridge in 2nd slot, i can see some signals (using a multimeter in frequency mode).
there are some others traces that look not clean, but not damaged.
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Chips,
Ping Chaoticjelly or MKL for services on your side of the world. Either one should be able to get it running for you.
Ping Chaoticjelly or MKL for services on your side of the world. Either one should be able to get it running for you.