modessitt
Volunteer: Encyclopedia Submission Moderator
I am working on a T2 with non-functioning guns. Both gunsites are stuck in the upper left corner.
When I opened up the gun bases, I found one wire off on the Y axis pot of the left gun, but the other three were wired up properly. I reconnected the loose wire and then checked the 4 pots with my meter. The one with the loose wire has a good 5K reading across the outer lugs, and smooth readings from the center to each outside lug as the pot turns. The other three pots show opens between all lugs, so I assume they are bad and will replace them.
Now - on the test screen for gun calibration, when I turn the good(?) pot, I get no change in the number for the Y axis. The fuses are all good on the Gun input board, and I don't see any problems with the connector. Do both pots have to be working for the gun to register? Or is there something else I should be looking at?
Thanks...
BTW - I should be able to pick these little 5K pots up from Radio Shack or Fry's, right? Even if I may have to trim down the shaft? And I guess the end needs to be beveled for the gear sleeve to turn with it?
When I opened up the gun bases, I found one wire off on the Y axis pot of the left gun, but the other three were wired up properly. I reconnected the loose wire and then checked the 4 pots with my meter. The one with the loose wire has a good 5K reading across the outer lugs, and smooth readings from the center to each outside lug as the pot turns. The other three pots show opens between all lugs, so I assume they are bad and will replace them.
Now - on the test screen for gun calibration, when I turn the good(?) pot, I get no change in the number for the Y axis. The fuses are all good on the Gun input board, and I don't see any problems with the connector. Do both pots have to be working for the gun to register? Or is there something else I should be looking at?
Thanks...
BTW - I should be able to pick these little 5K pots up from Radio Shack or Fry's, right? Even if I may have to trim down the shaft? And I guess the end needs to be beveled for the gear sleeve to turn with it?