srarcade80
New member
I got a bubble bobble that had a blown sound amp. I replaced it with the same part, sound works great but man, does that sucker get hot. I can see how the original one broke. Anyone run into this issue before?
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Looking at the schematic, it looks like there is a 330mfd 25V (C36) and a 0.1mfd (C35). The parts list has it as C5 and C13 (25V Ceramic).
The schematic looks like the amp is running in bridged mode... According to the data sheet, pin 8 and pin 10 of the audio output IC are both audio outputs and NEITHER pin should be grounded. Check to see if your audio wires have one grounded. This would cause the amp to run blistering hot and burn itself out.
This may sound dumb, but check the schematic for the game vs. the cab wiring.
The schematic looks like the amp is running in bridged mode... According to the data sheet, pin 8 and pin 10 of the audio output IC are both audio outputs and NEITHER pin should be grounded. Check to see if your audio wires have one grounded. This would cause the amp to run blistering hot and burn itself out.
On the board edge connector, pin 5 is speaker + and pin E is speaker - and NOT ground.
RJ
I did this once when I was making a jamma adapter.