MarkWComer
Veteran and General Yakker
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Left and right picos read good... Zero ohm resistors read good
Mark goes at it again... just bought a PL700/II!
- Thread starter MarkWComer
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Remember nothing is shared on the G1 so if your negative regulator is not working that is where the troubleshooting starts
MarkWComer
Veteran and General Yakker
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VR50 is a conductor, not a semiconductor!
I wonder what made it fail...
Will get on Mouser or DigiKey in the morning...
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Breathing on it...
PM me your address and I will mail you one Mark.
MarkWComer
Veteran and General Yakker
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D50 shows 11Ω in both directions, D53 looks good, too
Had it failed open you would have gotten ~19.3V
MarkWComer
Veteran and General Yakker
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Yeah, that does it sometimes. I should brush my teeth, but since the quarantine, why bother?
MarkWComer
Veteran and General Yakker
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I should add that Q50 checks OK, no problem with that.
MarkWComer
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On the plus side, reviewed the video clips and they look great.
Getting the knack of this camera.
Getting the knack of this camera.
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Dunno when your vid's private.. but if there are backplanes involved then pico fuses?
MarkWComer
Veteran and General Yakker
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Yes, found it. It is one of the picos. SHIT! Have to pull a backplane...
MarkWComer
Veteran and General Yakker
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The saga continues...
And continues further:
And continues further:
silver_face
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Had to do pull backplanes on a PL 400, (pico blew) I populated a transistor where it did not belong on the control board.
Great vid's
MarkWComer
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Thank you!
I think that fusing scheme has been changed in the rev. C backplanes from what I can see in the pictures.
silver_face
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Also on that PL 400 that I did, I had a probe slip and took out a zenor diode and a transistor.
Your vid's will help me do my Pl 700II. I already replaced the meters with White Oak meters , you gonna love Em...
Your vid's will help me do my Pl 700II. I already replaced the meters with White Oak meters , you gonna love Em...
silver_face
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We are not gonna be the only ones to show the world what not to do by doing it....
MarkWComer
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I’m still not 100% sure what I did, but pretty sure I hit the heat sink, not the transistor pin. The test point is so close to that sink that it’s easy to make that hit. I was told that I wasn’t the first to do this, so it must be a pretty common occurrence.
MarkWComer
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So... funny thing...
YouTube slaps a copyright bust on me for playing music in the background during my PL400 vids, but not for lifting the Three Stooges opening theme on these two latest uploads. I clipped from a couple Hollywood releases, too- but no bust from those, either.
Stupid, right?
YouTube slaps a copyright bust on me for playing music in the background during my PL400 vids, but not for lifting the Three Stooges opening theme on these two latest uploads. I clipped from a couple Hollywood releases, too- but no bust from those, either.
Stupid, right?