InitialNik
Student
Hi everybody,
I have a problem with a MV1F board.
When I received it, it hadnt any sound...so I started checking traces...I repaired 4 traces from Z80 to Yamaha 2610 and 2 traces from Neo D0 to Z80 I think.
I mounted Z80, Sm1, Ram 6116 in sockets and I replaced them by other working IC. I add: NEO-C1 is changed too, because 2 buttons were pressed. Yamaha 2610 is changed too by other working.
All new chips mounted are from other working board.
Now I have sound, (never had z80 error or similar) but there are missing sounds, for example: when I insert coins, no sound. In samurai shodown when select character, no sound when you move to select character.
And sometimes, for example, I turn off the board and I wait 5-6 hours...I turn on again and there isnt any sound, totally mute.
I cant understand what happening here, i can accept some missing sounds, but why sound is mute sometimes ?
Can anyone help me?
Remember, is a MV1F single slot.
I have tested with neo diagbios but I dont have M1 rom to test sound, when i do the z80 test I get a Z80 Error Expected: C3 - Actual: 00.
Thanks in advance.
EDIT: I Have checked traces between Z80 and Cart Slot + Y2610 to cart slot and everything OK. Traces between audio chip are ok. Only chip i havent changed is Neo-D0 becuause is in good condition.
I have a problem with a MV1F board.
When I received it, it hadnt any sound...so I started checking traces...I repaired 4 traces from Z80 to Yamaha 2610 and 2 traces from Neo D0 to Z80 I think.
I mounted Z80, Sm1, Ram 6116 in sockets and I replaced them by other working IC. I add: NEO-C1 is changed too, because 2 buttons were pressed. Yamaha 2610 is changed too by other working.
All new chips mounted are from other working board.
Now I have sound, (never had z80 error or similar) but there are missing sounds, for example: when I insert coins, no sound. In samurai shodown when select character, no sound when you move to select character.
And sometimes, for example, I turn off the board and I wait 5-6 hours...I turn on again and there isnt any sound, totally mute.
I cant understand what happening here, i can accept some missing sounds, but why sound is mute sometimes ?
Can anyone help me?
Remember, is a MV1F single slot.
I have tested with neo diagbios but I dont have M1 rom to test sound, when i do the z80 test I get a Z80 Error Expected: C3 - Actual: 00.
Thanks in advance.
EDIT: I Have checked traces between Z80 and Cart Slot + Y2610 to cart slot and everything OK. Traces between audio chip are ok. Only chip i havent changed is Neo-D0 becuause is in good condition.
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