I picked up a Beast Busters Second Nightmare machine for 20 bucks off a local op, was missing the power supply and he said the guns had issues, but I didn't care, it was 20 bucks. I've wanted this game for a while, and for 20 bucks!?!? Hell yeah. Anyway, put a power supply in it today, I fixed the monitor last week, and fired it up for the first time this afternoon. No sound (found a blown fuse), not a great pic, but I was able to play a game. Second gun just had a broken wire on one of the pots so both guns work now, yay. But here's the problem--a cut wire harness, and I have NO idea where it's supposed to go. Please look at the pic, and if anyone has a BBSN cab, if you wouldn't mind, please tell me what this is supposed to go to. My blind guess is a volume/test control panel behind the coin door, as it's missing one and I can't find where the heck it would be if it had it. It's the only large molex connector in the area in the pic, on the inside by the coin door (and audio amp?). Oh and please ignore the dust bunnies, I haven't had the chance to do my usual strip and clean on it yet, a ritual I do on every game I bring home.
After a week of poking around online, I checked the arcade manual links on this site, and of course found the manual in the first url I tried. Once again I unintentionally use the bass ackwards approach to repair, har. Schematic is a bit convoluted and IMO a bit odd in it's labeling, but it does confirm the test/volume panel is missing from the machine. In the manual it says both switches must be on the machine, the front one on the test panel and the one on the back on the power supply. From playing the game I'm wondering if the front on/off switch isn't separate from the power supply and instead runs to the gun board, as I'm getting nothing from the guns for vibration. A quick look at the cab before bedtime revealed a few empty plug sockets on a few boards (1 on game board, 1 on sound board, 1 on gun board) so maybe the operator robbed the test panel and also unplugged a few of the connectors to use on other machines. The marquee still has the note the op taped to it about the cab being marked for disassembly (dumpster death, aieee!), so I guess I'm lucky it's only missing a few bits and pieces. I wish I had more free time for this type of puzzle.
You can do it, it just takes time. Odds are when he robbed out the coin mech, he just cut away the wiring for coin detected, test/vendor mode, volume pot, and the illumination for the coin if it has any.
Victoly is mine! Went by Rat Shack and nabbed two pots, traced the wires down, rigged them to the pots, fired up the game, and yaaay, sound. Well, main game sound, checked and found red with a black stripe wire looks an AWFUL lot like red with a brown stripe wire in less than perfect lighting conditions. Rigged it to the right wire and the gun speakers fired up. So it's all working, need to cap kit the monitor, but hell, I'm pretty happy it lives again. Sorry to clutter the forum with my "I need wiring/oh, here's a manual" reverse method of repair, hah. Horrible pic of it working.
