im only getting 28.3 volts to my A6 sound board and having problems, I've already replaced the bridge rectifier on the power supply side of the pinball, is that enough for the A6, I'm having fading volume problems, I've replaced the SC01-A chip already and suspect the amp on this board. Seeing that my R15 and R16 are fine, can I not just connect up a cheapo 12V ebay amp to the pins and connect it to the speaker bypassing the whole mess?