Ok. So I sent my MPU board off and it was repaired. The game now boots, but the insert lamps don't work. The solonoids worked for a few seconds when I replaced the fuse in the small board in the lower right of the backbox, but the fuse blew right away. Where should I be starting the troubleshooting?
Any help is greatly appreciated.
Ok, so I replaced the fuse on the flipper power board with the right one (had a 2.5 instead of a 5A fuse) - Flippers started working. For a while. Inserts still don't work. Now no coils are not working and I think this is why: Should I just replace the power supply board?
Ok here is the deal. Need some wisdom. Finally got the game working 100% with no more switch matrix issues. So now the last remaining issue is killing me. Game plays fine for a few games. After it gets warm it will eventually freeze and go to GI only. It won't reboot. This will happen in attract mode or while playing.
The MPU is still getting 5V and the MPU display readout is "8". Any ideas on where the cause and solutions?
I am able to power cycle it and play again but it will freeze and go GI only shortly thereafter.
Quoted from GRUMPY:
I would check for the correct voltage, 5 and +12 at the CPU. I would check for AC voltage on both of these. I would swap both CPU chips on the Cpu board. I would check for cracked header pins for the power cable that goes from the power supply and CPU board. Also remove the game Roms and look for dirty or bent pins. Clean pins with an eraser and reinstall Roms. Last would be to monitor the 5 volts while someone plays multiball until it locks up.
Thanks. Is there a +12v test point on the CPU? The 5V tests fine at the test points on the MPU board.
So now I am having an issue with both hideout kickers fireing when I boot the game on. See the video. Is this a switch matrix issue?
Here is one that came up on my High Speed: When I power up the game, I hear the relays clicking under the playfield. The start button won't start a game. The first time I press start 3 relays (under the playfield) click a few times and then stop. I can go into solenoid test and switch test and everything works properly.
Any ideas on this one?
Quoted from PiLgRiM:
Check the switch right above the ball shooter. It needs to sense the ball there after the game starts and it pops one out of the trough. It will try a few times, then give up from what I recall.
It’s not that. None of the playfield solonoids will fire. At all. They won’t even feed them into the trough. If I manually put them into the trough a game will start. But none of the playfield solonoids fire. Just the flippers work.
All fuses are good. I can hear the these three relays clicking a few times.
Quoted from Tomass:
About to join, I think. Trading a working Rescue 911 for a High Speed with a locked coil. Playfield looks real nice though. Pinside shows value in their favor, but I prefer sys 11's mostly. Never played High Speed. Anyone have any thoughts on this trade? Also pins are limited in AK so hard to find specific games. Not like I can wait for the next HS.
This trade is a no brainer. Classic Steve Ritchie flow, awesome sound package, an absolute classic. R911 isn't even close for me.
Quoted from GRUMPY:
Use your logic probe on U-49 pin 1 and pin 2 in coil test. Do you have pulses? Yes, the check U-50 pin 1, do you have pulses? Yes, then replace Q-76. Let me know what you find.
U49 1 and 2 have pulses. U50 pin 1 has pulse. Replaced Q77. Replaced Q76. Still does not work.
Also both kickers and one more jet bumper are not firing in coil test.
Edit: 11A board may need a jumper to work properly in HS. Researching.
Ok, so I am trying to track down another issue with my High Speed. Currently, 4 special solenoids do not fire in test or game. Solonoids 17,18,20,21. (Q75,Q71,Q69, and Q77). During test, the pulses seem to be correct, so I don't think its a IC issue. Grounding the transistors do not fire the coils. Coils have power (28v). Maybe its a grounding issue? anyone?
Quoted from PinballAir:
It is one big rubber which I believe is a 5".
And yes the assembly has to be removed.
I removed the one on my game to clear coat and it did not seem that difficult, but in my case, I had the playfield out of the machine.
No, it is actually two big rubbers. Well, at least it was on my game..
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