I'd like to resurrect this thread because this problem continues to give me trouble and I need some help.
I've had this game for 4 months and it has played excellent except for a lamp matrix issue which was resolved by replacing the Q84 transistor.
It was back to its former glory until I started having a ball trough issue. During a game it wasn't registering when a ball drained unless I waited 5-10 seconds, or I pressed both flippers at the same time. I figured it was a trough switch issue. Did a switch test, and adjusted the left, center and right switch and all was well again. (Also fixed some fish paper that was underneath the mounting plate of the shooter lane switch. I just moved it from underneath back to where it belonged) I haven't had this issue since.
About a week after that I had some friends over and the game locked up during a game. Everything but the GI lights turned off, even the displays, music looping. I turned it off, waited a few minutes and turned it on and it never did it again that night.
I tried playing it the next day and it locked up, every game. It even reset back to attract mode one of those times.
This has been going on for 2 weeks. Here are all the symptoms:
-Attract mode works fine. It has been on for a few hours without malfunctioning.
- play a game and the game will reset back to attract mode (this happens the least)
-play a game and everything turns off, except GI lights and music. (this happens the most)
-play a game and it freezes. Whatever lights are on during the game are locked on, flippers still work, displays work, but no shots register or change the lights.
-Blew the F2 fuse a couple days ago on the power supply, replaced it with a 2.5 amp 250v slow blow
- after I restart the machine, I've pressed the CPU test switch on the left hand side of the board and it reads 0 every time. It has given me a 5 twice, but after I open the coin door, I press the test button again and I get a 0.
What I've checked:
-checked for broken diodes on coils, no diodes, backwards diodes, everything looks good to me.
-checked voltages:
Tp1- 4.99vdc
Tp2 0v tested for AC ripple and there was none
Tp3- 12.95vdc
Tp4-14.7vdc
Cpu-4.96vdc
3J5 Pin 3-100.8vdc, Pin 4-101.3vdc, Pin 5- 4.99vdc
- I've tested all of these voltages during attract mode, during a game, and during a lock up, and they all are within .03-.04 of each other or exactly the same.
- I put all of the screws back into the CPU board, as I had about 3 or 4 missing when I bought the game, and tightened them all down. This seemed to resolve the issue for about a dozen games, and then it locked on me again.
-reflowed solder on capacitors C1, C3, C10 on power supply. The person I bought it from said he replaced all of the larger capacitors on the power supply, so I assume they are good.
- pulled the U26 and U27 rom to reseat them
-also pulled all of the connectors from the power supply to reseat them
-today I installed the Inkochnito rectifier board.
I'm running out of pinside thread reading materials and the problem persists. I'd really like to try some other troubleshooting if someone has any suggestions, otherwise I was going to start replacing diodes on coils.
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Little Elm, TX
