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(Topic ID: 234468)

Rescue 911 power probs


By mark532011

1 year ago



Topic Stats

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

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#1 1 year 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

#2 1 year ago
Quoted from mark532011:

I have checked the fuses
So I am looking for a place to start on this

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)

#3 1 year ago

I'm no expert.Mine was doing crazy stuff with the voltages and I found the capacitor on the transformer was shorted.

#4 1 year ago

You might need to replace the ribbon cable between the driver board and MPU. There are some shared strobes for switches and lamps that might prevent them from working if there is a connectivity issue.

https://www.greatplainselectronics.com/proddetail.asp?prod=130-220

#5 1 year 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

#6 1 year ago
Quoted from mark532011:

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.

Go across the "legs" - across the secondary coils of the transformer (or the input pins of the rectifiers, in either case you need to look at the schematics)

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