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Well, got this working! A guy from Pinside, Erak, came over Saturday with is friend's Hollywood Heat SB. It worked & luckily his friend was willing to sell. I guess what happened was I re-pinned the connector backwards, sent 12v somewhere it shouldn't have gone & then chased my tail. I...

Taking it to NuTech tomorrow to have Z13 socketed & replaced.

I checked Z13 in diode mode with it disconnected & this is what I got. I assume my DMM's not displaying the decimal & 015 is actually 0.15. L1=717; L2=578; L3=716; L4=015; L5=572; L6=574; L8=578; L9=711; L10=577; L12=586 So, with leg 4 being low, I guess the chip's bad?

I read about using a DMM to check logic, so I checked the logic on Z13 on the driver board (you get used to playing with no sound). Leg =0.16; Leg 2=2.34; L3=0.16; L4=0.49; L5=0.12; L6=5.08; L8=5.08; L9=0.16; L10=3.97; L11=0; L12=3.99; L13=0 & the Vcc=4.99. Legs 3 & 4 both being low, it looks...

Unfortunately, the Docent appears to be only a kit where you reuse the housings. I'll search around & see if a kit's available. Edit: Yikes! Could only find a 7" at Marco for $55 US. Guess I'll try re-pinning.

Will do. I only have the 0072 (?) Molex pins. Will they fit in the double-sided connectors? Is it a pain to do the double-sided ones?

There's a couple single-sided connectors, A1J1 being one, that I haven't done & I haven't done the double-sided connectors. I've done all the ground mods. The game sound isn't just intermittent, it's all messed up. I think it plays every sound constantly.

Hi shinynick. I have the manual & the dip switches are set correctly. I'll mess with them though & see if anything changes. Interestingly, after not having any sound for a month or two, the sound came back Sunday.

While in attract mode it was resetting, where the display would flash & some relay would click, so I checked the 5v at A1J1. I know I set it to 5v, but it was 4.8v, so I set it to 4.96v. When I did this, it made the explosion sound so I went through the sound checks. It made one sound when I...

Okay, I'll call Al & see if he can dig up his soundboard. Won't know if it's the board or ROMs until I try. Thanks everyone for your help. I'll let you know if I get it working.

I checked those cap voltages. I got 4.98v on C18, 12.72v on C10 & 12v+/- on C19. The schematics show the positive end towards the switches (the manual shows the board upside down compared to how it's mounted in the back box). Of course, if I reverse the probes, I get -12v. Does this mean...

I read on a blog, http://ty-ffasi.com/repair/gottlieb-system-80b-sound-boards/ that the display could keep the SB from working & I read somewhere else that the driver board will hold the signal low & prevent the sounds from working when grounding the pins of the SB connector, so I tried both the...

Totally understand Sylvain. The LED blinks correctly. There's no test for the sounds, only the beep that the MPU is working. I'll check those caps tonight. I don't think any chips get hot, but I'll be sure to check. Depending on what I find, I'll give Al a call. When he was here looking the...

I tested the SB grounding pins 1, 2, 3, 5, & 8 & didn't get any sounds. Pins 4, 6 & 7 don't have any wires. Does this mean the SB's bad? I'm not sure what to do now. Get another SB? Find someone to burn the sound ROMs?

I went through steps 2, 3, 5 & 6 and got absolutely nothing. I disconnected everything from the diode board & checked Z31 in diode mode. All the pins except no. 4 were in the vicinity of 0.4 to 0.7. Pin 4 measured .015. Does this mean the chip's bad? Would this stop all the sounds?

I finally got around to "Testing the Data Pathway". I jumped to ground pins 2, 4, 6, & 8 of Z13 on the driver board & got nothing. The pins on A3J5 look good, but that's the one single-sided connector I haven't re-pinned because I mistakenly ordered a 7-pin connector housing instead of an 8...

I had C7 & VR1 replaced. I now get -12.26v DC on A6P1 pin 13 & 12.8v DC on pin 14, -12.25vDC on pin 5 of A5P1 & testing R7, I get -15.9v DC on one end & -12.26v DC on the other, so the voltages are good. Unfortunately, there's still no sound, although it may come back after warm up. I'll have...

Thanks. I'll take it in on Monday.

I'm going to take the board in & have C7 & VR1 replaced. C7 is 47UF, 50V & VR1 is a 1N4742A. Are there recommended upgrades, or just replace with the same?

If that's the case, I'll take it to the place that socketed some chips for me & have them replace the cap & the zener. I turned it off & checked the zener again & got 298 & 223. On A5P1, pin 5 measured -6.5v DC & R7 measured -13.39v & -6.49v. On A6P1, pin 13 measured -6.5v DC (-12v DC) & pin...