This is a restored volcano I picked up. It has a Rottendog MPU and NiWumpf driver board. Game played fine and then decided not to start a game. I checked trough switches and all appeared okay.

Powered back up the pin and the displays are out, speaker has a whine to it, and some of the controlled lamps are stuck on along with GI.

Checked voltages in the cabinet and have the following:
F1 -4.5vac
F2- 4.5vac
F3- 5 vdc
F4- -7.43vdc
F5- 13.8vac
F6- 34.6vac
F7-77.2vac

Voltages in the backbox power supply are as follows - note 5vdc is missing at TP4 and 5vdc led is not lit.
Tp1-63.3vdc
Tp2- 45.7vdc
Tp4-0 vdc
Tp5-15vdc

The 5vdc led on the MPU is also out. Checked and the MPU is not getting 5vdc so it cannot boot.

Not very familiar with these system 80 games. Any help on trouble shooting would rally be apprciated.

Grumpy,

I pulled the power board and found where someone had broken one of the legs on the silicon rectifier at scr1. I resoldered and it worked for second- had correct 5vdc and then crapped out again. Is there an equivalent for that rectifier? Not finding one on the web.

Thanks.

Grumpy,

I got the power supply back and the game now goes into to attract mode. I still cannot get a game to start, which was the original problem before the power supply crapped out. One day the game is working fine, the next day the game will not start.

It has a rottendog MPU and NiWumpf driver board. It is as if the game does not recognize the balls in the trough. Solenoid self test activates all solenoids including the ball kicker in the trough. I don't have a schematic so don't know which transistor on the driver board controls the ball trough kicker. Would it be the same as for a black hole? I have that manual.

Thanks for the additional reading. I have filed it away for future reference.

No on the slam switch mod. Was not aware of that mod for system 80 games - don't work on these very much as I only have a black hole in my small collection. I will run a switch test later this evening when I get home.

I could not determine the switch test for the rottendog board during attract mode. I figured out the solenoid test because they started firing. Rottendog does not post their manuals online. Do you know which number is the switch test while in diagnostic mode?

Thanks,

No manuals on info available through their site. I did a google search and didn't come with anything either. I will contact them directly.

I got the game to start - had to manually add credits with the coin door switch. Two pop bumpers and the return kicker on the left out hole are not working. Also background sound is not working. I checked the dip switches on the soundboard to make sure it was set for background sound. Leaving to go out of town and won't get back to it until next weekend.

Finally a little time to get back working on this pin.

As I mentioned above, I got the 5volts working so the game now goes into attract mode. Free game does not work, but I can start a game with the coin door switch. Sound has voice but no background sounds. Several solenoids are not working - pop bumpers, left ball kick back, ball tough kicker.

I am trying to tackle the sound first. All ground mods are completed. Whe I push the test button on the sound/speech board it says "eprom one failed". not sure where to start.

Thanks

The target sounds are missing. I have voice and the Volcano eruption background sound. The sound board is original. New boards are Rottendog MPU and NiWumfp driver board.

I will try toggling DIP switch. I did reset all the DIP switches when initially checking out the problem but did not try resetting the 5th switch several times.