I am working on restoring the sound to a Bullseye / 301 pinball machine I have. When I purchased this pin, it was missing the sound PCB, and I was lucky enough to find a pin owner through RGP that was willig to loan me his board. I've hooked up the board in my pin, but I'm having a problem.
At first, I tried plugging the speaker into J3, circled in red. I heard nothing, even though the connector has a small sticker on it labeled 'speaker.' Adjusting the volume pot (orange square) does nothing.
Currently, I have it hooked up like the picture shown below. I have sound, but it's very faint. My speaker is plugged into the connector circled in yellow, which is J4 on the schematic. Plugging into that connector gets me faint sound, but adjusting the volume pot on the pcb does nothing.
Looking at the schematic for the sound module, it would appear that J3 is the speaker connector (red circle), and J4 (yellow circle) is for a remote volume adjustment pot. I have no such pot installed in my table.
So my question is this: how do I hook this up so that my sound PCB can control the volume? Do I HAVE to install a remote volume control?
At first, I tried plugging the speaker into J3, circled in red. I heard nothing, even though the connector has a small sticker on it labeled 'speaker.' Adjusting the volume pot (orange square) does nothing.
Currently, I have it hooked up like the picture shown below. I have sound, but it's very faint. My speaker is plugged into the connector circled in yellow, which is J4 on the schematic. Plugging into that connector gets me faint sound, but adjusting the volume pot on the pcb does nothing.
Looking at the schematic for the sound module, it would appear that J3 is the speaker connector (red circle), and J4 (yellow circle) is for a remote volume adjustment pot. I have no such pot installed in my table.
So my question is this: how do I hook this up so that my sound PCB can control the volume? Do I HAVE to install a remote volume control?
