Hello all,

I am a new member here and this is my first post. I have been a member of klov for a few years now and have recently sold off most of my video game collection to consentrate more on pinballs.

Here is what has been done to buck so far by me. I have installed a new xpin power supply in the back box. I have removed the battery from the mpu and added a remote one. I have done a few of the ground modifications. All fuses are good and the correct size, all coils check good, the edge connectors are not new, but are making good contact. I have inspected every one of them. I plan to re pin them, but not yet.

Here is what its doing. When the game is turned on I get general illumination, 5 seconds later the tilt and game over relays engauge and then disengauge, but I get no displays and it seems like the game does not boot. I dont think it was booting because if I hit start, or add a credit nothing happens. There is one bulb blinking behind "high score to date" all the others are lit solid. If the game has been powered up for a minute or two I think its in attract mode because some sounds will go off then stop. I checked the x pin power supply and it is not getting the +60v needed to power the displays. I then plunged below the play field and tested the bridge rectifiers. The one on the left (cpu lamp bridge) tested .45 across all 3 connections. I had set my meter to diode setting and put my red lead on the ground and used the black lead to test the other 3 connections. I then tested the other one (Coil bridge) the same way. There was only one lead that read weaker than the rest. Two of them read .45, the weak one read .14. Does this mean I have found the problem? I have not tested the small transformer voltages yet, because I didnt know what the voltages were supposed to be. Pinrepair.com has realy helped me in the disagnosing of this machine but I figured I would reach out here and see if I can get any other directions to go.

Thank you in advance for the help,

Austin

P.S. If needed I can provie pictures and a short video of what the machine is doing.

Do you think the rectifier in the bottom is bad since the one leg read weak?

There was no acid damage on the mpu or edge connectors, and the pins appear to be in good shape and making good connections. Like I said I am not getting the 60V to the powersupply which comes from the bottom of the cabinet. I dont feel like it has anything to do with the connectors at this point.

I will pick one up this weekend and report back.

Thank you!

UPDATE: Well the bridge was not the main issue. After I replaced it I was still not getting the proper voltages at the harness a2j3. I then checked the voltages coming out of the small transformer. All voltages were correct except the 69vac. Line taps #8 and 9 off the mall transformer are only reading 30vac. I used the transformers ground to check these voltages. At this point I have a feeling the windings in the small transformer for taps 8 and 9 are bad.

Do you guys think I'm on the right track?

There is not from the factory but you better believe there will be once I replace the damn transformer. Anyone know where I could get one? :/

Wow, who quoted you that to rewind a transformer?! That seems outrageous to me!

Thankfully I found a friend here locally that is selling me an entire Buck Rogers lower cabinet working minus the sound board. It would be nice to have some spare play field parts. Sounds like God herd my prayers. lol.

Thank you to all of you that have helped me with this issue. I will post back once I get the old "new" power board in.

The Connector was plugged in properly. My sticker is still attached telling me which direction to install it. I can't believe someone quoted that. That is just crazy imo. I wish I could say that I can work around that one bad winding but I cant find a transformer that will take 120v in and output 69v. :/

I will pick up the other "parts" cab hopefully this weekend and swap the transformers and install the fuses immediately. I will report back once this is finished!