(Topic ID: 234468)

Rescue 911 power probs

By mark532011

5 years ago



Topic Stats

  • 6 posts
  • 4 Pinsiders participating
  • Latest reply 5 years ago by wayout440
  • Topic is favorited by 1 Pinsider

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#1 5 years ago

Just got a Rescue 911 and have started looking at it. some of it is working but not much and I was hoping my description will give someone a clue on where I should start.

When powering on, the lights all seem to work correctly and when I hit the start button I can hear some music. But I have no display and no flippers and no bumpers/solenoids. I have checked the fuses but I have not done the recommended grounding fix yet.

game start video:

At first I suspected the power but when the self-test is run, portions of it works, the lamp test individually lights each lamp and changes via the flippers so I know at least the power to the MPU and Lamp boards are good. The solenoid trest doesnt do anything even though a couple of solenoids appear to be trying to reset during game start.

self test video:

So I am looking for a place to start on this

#5 5 years ago
Quoted from wayout440:

You checked the fuses? Did you check for power at the fuses with a DMM? Start with checking for the following voltages at the transformer module fuses:
F3: 3/8 amp slo-blo (95 volt AC DMD display power fuse) - vertical style fuse holder (often fails)
F4: 3/8 amp slo-blo (58 volt AC DMD display power fuse)
F5: 2.5 amp slo-blo (10 volt AC power supply). Goes to the 12 volt DC bridge rectifier.
F6: 10 amp slo-blo (16 volt AC for the CPU controlled lamps and switches). Goes to the 20 volt DC bridge rectifier.
F7: 8 amp slo-blo (50 volt AC solenoids). Goes to the 48 volt DC bridge rectifier.
F8: 10 amp fast-blo (6.3 volt AC backbox general illumination)
F9: 7.5 amp fast-blo (6.3 volt AC playfield general illumination)
F10: 3 amp slo-blo (12.6 volt AC auxiliary power supply)
F11: 3 amp slo-blo (12.6 volt AC auxiliary power supply)

hmmm, looks like some problems. I wasn't sure where the other lead was for checking AC, so I measured against ground which should give me 1/2 volts for AC.

F3: 96v. Too much
F4: 30v, looks good
F5: 4v, looks good
F6: 9v. Too much
F7:25v, looks good
F8,F9: 3v, looks good
F10,F11: 12v. Too much

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