Dogyuun (korea) strange audio problems

[Uroko Sakanabito]

Hey, i have strange audio problems with my Dogyuun:

After coming back from the repair i still have missing sounds with my Reijin Supergun setup
Sounds 1-7 work but then 8-13 are missing, 14 works again etc...
Rest plays fine, including the game itself.

My modder says it worked fine (and i believe him)
He used the Supergun Mak Strike v3

Any ideas?

 

[Darksoft]

If he really tested those sounds and worked well for him and the board did not get damaged during transport, then I'd check the +5V on the Jamma. I don't think that this game needs -5V but worth checking. My guts tell me that he tested it but not as much in detail as to notice that some tunes work and some dont.

 

[ShootTheCore]

The symptoms you describe make me think one of the address lines for the ROM that stores the sound samples isn't functioning. Could be a broken trace or corrupted ROM. The ROM is labeled "22" and is located at position A5 on the board - check it for broken traces.