Operation Wolf Issues

BozoTheClown

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So I picked this machine up a few weeks ago at auction and finally had some time to dig into it this past weekend. I knew the grenade button wasn't working and that the recoil action was failing. First thing I do is remove the gun from the game and tear into it. Finding a broken wire for the grenade, problem #1 fixed. There were a couple of other wires with the shielding worn through so I put some liquid electrical tape on them.

Next up was the recoil so I removed the assembly, cleaned it, lubed it, and re-installed it. Went to test it in the game. So I put everything mostly back together and sure enough the grenade button now works and the recoil is working as expected. What I do notice however is that there is no sound. A little more poking around at connectors and stuff, now the gun recoil isn't working at all.

So my current issue is a lack of sound and no power to the gun recoil or light sensor (the trigger functions). I've played with it some more and replaced some minor parts that I bought as spares, but nothing changes. I need some direction here. Do I have a power failure or PCB failure? I know the top board is dedicated to sound, and I did try to connect the speaker to amp #2 with some jumpers I have, but it didn't seem to help at all. There appears to have been some mouse activity at some time as there were droppings in the box and what I can only assume is dried urine on the sound board, thus the board could use some cleaning, but the sound and recoil were both definitely working previously, even if it wasn't at the same time. I'm hesitant to start randomly replacing anything else without some expert input :)
 
Do I have a power failure or PCB failure?

break out that multimeter and start checking voltages
I would start at the power supply and see if theres +/- 12volts and also check the +5v while you're there
if all is well there, check the voltages on the game board now and see what they are
that game board is pretty big and maybe the switching power supply is a little weak/low and needs to be turned up a little bit or maybe you have a weak pin in the connector that is inhibiting electron flow

I have a good used power supply that I use to swap in to verify if the old power supply is worn out, getting hot and failing or whatever
if problem goes away then you know the old PS is bad

good luck
 
I can certainly start with that. I have tested the main PS and everything seemed to be in order, but I can still swap in another from my stock to see if it helps. Will post up this evening after work.
 
There is an aux board in there for power to the sound and recoil. check that small pcb for proper voltages and make sure that fuse is good. I think when you fixed the recoil issue, it pulled enough amps to blow the fuse on the auxiliary pcb.
 
There is an aux board in there for power to the sound and recoil. check that small pcb for proper voltages and make sure that fuse is good. I think when you fixed the recoil issue, it pulled enough amps to blow the fuse on the auxiliary pcb.

That PCB is actually one of the items I replaced with a supposed known working spare. Both fuses on both my original board and the "new" one test fine. I'll try to figure out the proper voltages it should be getting in and out to test that way. If anyone has a cheat sheet with that info on it I would appreciate it. Save me some time tonight :)
 
That PCB is actually one of the items I replaced with a supposed known working spare. Both fuses on both my original board and the "new" one test fine. I'll try to figure out the proper voltages it should be getting in and out to test that way. If anyone has a cheat sheet with that info on it I would appreciate it. Save me some time tonight :)

I believe it is just single voltage 12 or 13.8.

I fix the sound boards but have had mix of results fixing main board.
 
That PCB is actually one of the items I replaced with a supposed known working spare. Both fuses on both my original board and the "new" one test fine. I'll try to figure out the proper voltages it should be getting in and out to test that way. If anyone has a cheat sheet with that info on it I would appreciate it. Save me some time tonight :)

In my experience, it is never the fuse on these guys. I'm told it is the big cap.

Try disconnecting either sound or recoil and operate just one at a time. (Reducing the draw on the aux board.)
 
I had a similar thought and have tried disconnecting the gun connector but the sound didn't kick in. I will try again this evening just to be sure.
 
Ok, dug into a bunch of the suggestions tonight. Swapped out the mini power PCB which didn't help. Swapped out the switching power supply didn't help. Then I started playing around with the wiring and connectors and found the issue. If I pull the circled connectors back a little versus having them pushed in snug, everything works properly. The one on the left is the speaker output, and the one on the right most likely has something to do with the gun signals.

Now I have two of the internal wiring harnesses and they both did the same thing so I think I can rule out the connectors themselves being the issue. Could the pins just need a good sanding to clean up the contacts perhaps. Any suggestions on how to correct this more permanently?

Yes the sound board looks like it has seen better days. I believe there is more than a little mouse urine on it from over the years, but for now the machine seems to be working (although in pieces) so getting it cleaned up will have to wait at least a little while. I'll probably ask around and see if someone here wants is willing to clean it up and go over it for any issues.

 
The connector you have pulled part way off is the H connector (main board) and that is the power plug.
.
the other is the X connector on the sound board, it is for speaker out. It has seen better days but they usually work. It is the shinny new looking ones that never worked.


Ok, dug into a bunch of the suggestions tonight. Swapped out the mini power PCB which didn't help. Swapped out the switching power supply didn't help. Then I started playing around with the wiring and connectors and found the issue. If I pull the circled connectors back a little versus having them pushed in snug, everything works properly. The one on the left is the speaker output, and the one on the right most likely has something to do with the gun signals.

Now I have two of the internal wiring harnesses and they both did the same thing so I think I can rule out the connectors themselves being the issue. Could the pins just need a good sanding to clean up the contacts perhaps. Any suggestions on how to correct this more permanently?

Yes the sound board looks like it has seen better days. I believe there is more than a little mouse urine on it from over the years, but for now the machine seems to be working (although in pieces) so getting it cleaned up will have to wait at least a little while. I'll probably ask around and see if someone here wants is willing to clean it up and go over it for any issues.

 
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