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(Topic ID: 212255)

BTTF All controlled Lights not working


By ChrisPINk25

2 years ago



Topic Stats

  • 9 posts
  • 5 Pinsiders participating
  • Latest reply 2 years ago by GRUMPY
  • Topic is favorited by 1 Pinsider

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#1 2 years ago

I recently bought a BTTF. Initially had it upstairs and all controlled lamps functioned. I thought I was going to take off the head to move it downstairs, however, some of the power supply wires were soldered. So, I replaced all the plugs and moved it downstairs as one piece. Fired it up downstairs and now, none of the controlled lamps work. Checked the fuse. Found one that appeared to be blown, replaced it, still nothing. Double and triple checked plugs against pictures and the manual. Nothing. Tested the bridge rectifiers and they appeared to be good. The game functions, however, none of the scoring lights come on. It is hard to believe all the transistors that control these lamps went bad at the same time. Any ideas?

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#2 2 years ago

Did you check if the bulbs are burnt?

#3 2 years ago

I think it could be CN1 on the power supply board. Someone hacked it because it was burnt. I cut the wires (and applied labels) when I was planning on removing the head. I checked voltage at the sockets in question and I am reading 20 some volts. I think it is only suppose to be 6 volts. Did I burn out all the LEDs? Does anyone know if CN1 has the power for the controlled lamps? The three wires that were hacked were all grey. Details are on page 38 in the manual, however, it is not legible in my photo copy or PDF (I even used magnifiers)! So, it is possible I connected two wires incorrectly.

#4 2 years ago

Hopefully you can put CN1 back together... I don’t see wire colors in the manual per pin.
Pin 2 of CN1 goes through fuse F4, then to CN4 for the lamps. At least that’s how I’m reading it.

Once CN1 is back together, check connectors on the MPU: CN4,5,6,7

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#5 2 years ago

Ok guys, back to square one. The grey white and grey wire that has wire nuts is 9v for the display and cpu. The grey green doesn’t appear to do anything different when connected or not. I’m getting 32v at CN4 which you can see at the bottom of the power supply. Any ideas? I noticed the power supply only has two screws, could that be it? I get 32v at CN4 blue wires with or without the grey wire connected.

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#6 2 years ago

Back of ps

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#7 2 years ago

The cut wires that are supposed to be connected to CN 1 pins 10, 11 and 12 don't have anything to do with the 18 volts required to operate the controlled lamps. Pin 10 & 11 are each 9 volts AC to ground. 18 volts AC in relation to each pin. This AC voltage is rectified to create 5v,12v,-12v DC. The power supply doesn't create the 18 volts DC for the controlled lamps. It is passed through. It comes from the bridge rectifier mounted to the back box near the big blue capacitor. There is a fuse connected to it. Then goes to pin 1 of CN 1, through fuse F4 and output at CN 4 pins 5,6,7,8. Also CN2 is the ground for the 18v DC power(controlled lamps) from the bridge rectifier

#8 2 years ago

Thanks mikat11 I swear I checked the fuse on the rectifier and replaced when I started, but that was it. A big thanks to grumpy for his help as well!

#9 2 years ago

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