Boot Hill sound board pinout? (Midway, 1977)

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Does anyone have the pinout for the Boot Hill sound board please?

I'm mainly confused about pin 4 on the 13 pin connector - according to the wiring diagram this is +5 volts DC (this goes to the TIP110, specifically the Collector) yet the schematics simply state '15' for pin 4
note: the TIP110 handles the coin meter.

I'm not convinced that the schematics and wiring diagram that I have are 100% accurate which is why I'd prefer to look at a known good pinout.


Thanks
 
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the schems are correct, just repaired and fully tested a BH boardset including the audio - both speakers coin inputs and everything else and all checked out with the factory schematics
 
Thanks very much. Do you happen to know what the '15' means for pin 4 (13 pin connector) on the schems?
 
i believe what you are seeing is a typo on the sound board schematics showing "i 5" instead of "+5"

are you having a problem with your coin counter circuit?
 
i built a test harness for the bench so the one thing i didn't test was the coin counter (don't have that)

so i guess to answer your question if your counter uses a 5v pulse to activate then pin 4 would be correct with 5v, if it requires a different voltage it would be something else - right?

btw, this pin does not need to be connected for the boards to operate
 
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