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#1
09-11-2011, 02:47 PM
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Flyback on my CTC-12...HELP!!!!
Okay, I'm about 80% done with changing the flyback on my CTC-12....and of course the new fly isn't exactly plug and play, so I had to transfer resistors and caps from the bad one.
I did all of the wiring successfully, except for two things. One is a thick blue wire running underneath the chassis to pin 9 on the picture tube. The second is a 47 meg resistor. Both are attached to the 4 pin junction on the flyback. I redid everything else correctly, but like a ham fisted retard, somehow I lost the positions of where both of these should go. Please help, it's all apart on my living room floor! 
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia." 
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#2
09-11-2011, 03:14 PM
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Pin 5 of the focus rect 1V2 should connect to a 1 meg 2 watt resistor as well as one of the filament leads. The other side of the 1 meg resistor should connect to that blue wire.
Pin 4, the other filament lead should connect to the 47meg resistor and the disc cap that goes to the focus coil, the other side of the 47 meg goes to the vert circuit. Maybe I misunderstood your question..?
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#3
09-11-2011, 03:49 PM
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I think I got it. We'll see.....
Incidentally, I ended up finding the schematics here: http://boxcarcabin.com/rcaschematics.html
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia."
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#5
09-13-2011, 08:46 AM
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It didn't go so well
 Nothing fried, but nothing else happened either. No raster, no sound, no nuttin. Back to the drawing board.....
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia."
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#6
09-13-2011, 09:25 AM
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what was the original problem that pointed you to replacing the fly?
if you disconnect the plate cap from the horz out do you get 400vdc at the connector (the wire not the plate cap of the tube)? Last edited by DaveWM; 09-13-2011 at 09:34 AM.
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#7
09-13-2011, 10:25 AM
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Check for a dead damper tube if there is no B+ on the plate cap of the horizontal output. A bad flyback could have killed it. If it's good, check for 390 volts on pin five of the damper.
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#8
09-15-2011, 09:53 AM
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I bought the set from grimer, needing a flyback. In retrospect, I should have powered the set up first and saw how bad the corona was (it had some burn marks) and tried to reseal it. Since it came with a NOS fly, I figured might as well swap it out. I'll pick up on the set when the snow starts to fly
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia."
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