(Topic ID: 214384)

Tales From the Crypt left slingshot won't fire

By swirvin

5 years ago



Topic Stats

  • 8 posts
  • 3 Pinsiders participating
  • Latest reply 5 years ago by swirvin
  • No one calls this topic a favorite

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#2 5 years ago
Quoted from swirvin:

The left slingshot on my TFTC will not fire in game play or test.The coil is good and will fire when the collector is grounded.Replaced the tip 122,the 2n4401,the 7402 or gate,the 7404 hex buffer, and the pia 6821. The switch does score points.I have no idea where to go from here

Hi there,Have you tested the main transistor and the pre drive transistor(Smaller one) that run that slingshot coil?Did you check the fuse,Pull it out and check with meter.Are there any diodes on the slingshot coil?if so those will also need to be checked.
1.The main transistor
2.The pre drive transistor
3.The coil and the coil diodes(If there are diodes on that coil)The coil very seldom ever goes bad unless it is fried.
All these 3 would need to be tested/checked with a multimeter.Replacing all 3 would be best so you won't be doing the same work over and over again,it is possible you may have shorted that transistor again if diodes,pre driver were shorted/faulty

#4 5 years ago
Quoted from swirvin:

Thanks I rechecked transistors coils fuses and diode all are fine.

The slingshot still not firing?

#5 5 years ago

This could very well be a switch issue,The switch blade might need to be adjusted to make contact,Also make sure the plastic piece on the slingshot is not screwed down to tightly.This will not allow the switch to make contact and the rubber ring hardens around the slingshot

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