Operation Wolf

Mcdog727

Member

Donor 2015
Joined
Jun 27, 2015
Messages
327
Reaction score
1
Location
Ellwood City, Ohio
Has nobody been able to fix the sound boards on these games. I picked up a free app Wolf that wasn't working. Re-pinned and reconnected the wires now game works great except no sound only static. Tried both audio outs and same static only, it does change pitch when the screen changes. New Z80, new pot and no change. Checked voltage all good, gun tracks and recoils like it should just no sound. Now waiting on a new YM2151 since it was the warmest chip on the board. Any other help would be great!

Thanks
Steve
 
YM2151 since it was the warmest chip

that the amplifier ?
I think the amp is bad

"warmest chip" you typed
warm is ok, hot is not

on some of these things you can tap the amp and hear the taps from the speakers, that's how you can tell on some of these that the amp is good

seems like you're doing just fine so far good luck


.
 
Sound board uses the HB-41 SIL custom which is quite prone to failure :


20160509215322-aje_fr-MODULE.JPG


Specifically the IC filters and mixes together both the music from YM2151 and sound FXs.Anyway, first of all you should determine if fault has an anolog or digital cause.Use a logic probe and an audio probe for this.
 
Last edited:
Back
Top Bottom