View Full Version : new flyback


timmy
01-10-2012, 05:30 PM
well guys i am sorry for all the crazy questions about this 66 motorola color so hopefully all will be fixed because i got a new thordarson flyback for it and i am confident that it will fix all the crazy things that were going on. i had given the wrong number to moyers and since i took the old fly out i then seen the number was different so i called and they had it. moyers is amazing and i was surprised he had one for such a set.

DaveWM
01-10-2012, 06:02 PM
great, looking forward to seeing it worked out.

timmy
01-10-2012, 06:14 PM
yes ill post pics of it when its done. it had a great picture befor so now it should be much better, i hope.

ctc17
01-10-2012, 09:14 PM
TimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmy
TimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmy TimmyTimmy
TimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmy TimmyTimmy
TimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmy
TimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmy
TimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmy Timmy:banana:

DaveWM
01-10-2012, 10:40 PM
better than great, fantastic :banana:

timmy
01-11-2012, 05:05 AM
TimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmy
TimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmy TimmyTimmy
TimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmy TimmyTimmy
TimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmy
TimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmy
TimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmyTimmy Timmy:banana:

ok,lol,lol......

Electronic M
01-11-2012, 09:35 AM
If each phosphor dot calls your name like ctc17 seems to be implying then you either need to check in to a mental clinic, get a new CRT, or have your TV exorcised. :yikes:
:lmao:

timmy
01-11-2012, 10:52 AM
If each phosphor dot calls your name like ctc17 seems to be implying then you either need to check in to a mental clinic, get a new CRT, or have your TV exorcised. :yikes:
:lmao:

.......lol,lol.....lol,lol..... the crt is from 1980 i am beyond mental as they wont admit me, and yes maybe it should be exorcised,:D

dieseljeep
01-11-2012, 08:14 PM
yes ill post pics of it when its done. it had a great picture befor so now it should be much better, i hope.

I hope that part solves all your problems with that set. I'd hate to see that set go to the scrap pile, because of an unobtainable part. I'm glad Thordarson made a replacement. Mine was a fine performing, well built set.

timmy
01-13-2012, 06:26 AM
well back to the drawing board, got the fly and got the same ,low hv and lines on the left of screen. i am going mental right about now.

ctc17
01-13-2012, 09:22 AM
We have been trying to tell you that sense that Silvertone set you were working on. Flybacks fail in really only 2 ways, smoke and fire and or meltdown of the horizontal output tube.

For what you spent on that flyback you coulc have picked up a few pieces of test equipment. If you are going to work on color you need test equipment. Start with a new high voltage probe, I bet the one you have is lying to you.

timmy
01-13-2012, 10:06 AM
alot of people think my hv tester is not right but with the silvertone this meter did get up to 30 kv and this set clearly has low hv, meter lying to me or not its low and something somewhere it seems the return path may be shorted or blocked, who knows because i dont,lol,lol. the new fly was only 48.00 and im sure the old one was weakend possibly in some way so the new one is in and ready to go after i find whats holding back or loading down. would the convergence board have anything to do with hv because i didnt check anything in that area.

timmy
01-18-2012, 08:47 AM
well still no luck with this motorola. i checked the green and blue drives voltage which is 415 volts and the sams shows a scope coming in at 100 volts and and it also shows 300 volts at the crt, but 415 seems high from what i am seeing in the sams. there are dropping resistors, where would they be, as i am so burned out with this set now but i dont want to give up. i eliminated the convergence and checked the hv but no change. HELP............

ctc17
01-20-2012, 09:32 PM
Unplug the socket off the back of the crt and see if your high voltage goes to where you think it should on your meter. If it does, good chance the crt is being overdriven.

You should be able to adjust those drive voltages with the drive adjustments.

timmy
01-21-2012, 06:51 AM
i did all those tests that should raise the hv including the crt plug, 6bk4 cap, focus rec, and no more hv.i have checked resistances in coils for shorts, checked voltages on the 6bk4, b+ , resistors around the horiz oscillator tube, voltages at the hot,all are very close, boost voltage ok. also checked resistances in the yoke which were right on but dont know if it makes a difference once the yoke is in circuit with the voltages that travel in it if there is a problem with the yoke. when i first got this set the edge of the yoke would sizzle alitte like static or maybe a short so i had taken it off to find carbon track on the other side so it went from the vert coil to the horiz coil. i cleaned the greasy stuff and it didnt arc again, so who knows if the yoke ohms could be good and still have a bad yoke, in circuit.

ctc17
01-22-2012, 01:24 AM
Hmmmm, I have never seen a set with proper boost, good picture and full width that had low high voltage. What was the complaint with performance again?

timmy
01-22-2012, 06:31 AM
Hmmmm, I have never seen a set with proper boost, good picture and full width that had low high voltage. What was the complaint with performance again?

the lack of height and width and the lines on the left that are distorted. i used the horiz centering to make up the width but i still understood the set had problems. just adjusted what i can to see how the set worked in the beginning. the source voltage 1010v is 1200v and i think the boost 570v is around 800v i dont remember exactly.

timmy
01-26-2012, 10:39 AM
hey guys i know i have been a thorn in the sides of some but is there anyone that can lead me in the right direction to get full hv back in this motorola set. i do have limited knowledge of this old stuff but i am trying. after a new flyback i still have low hv and i took each wire one by one off the flyback except the hot cap wire and the hv lead from the damper and there is no change. when i power up the hv will go to 16kv and within seconds it drops to around 10kv and the cathode current is still up around 250ma where it should be at 210ma. i have eliminated the wires to and from the fly and in the circuit , removed the hv reg tube, tried another horiz oscillator tube and checked resistors around that tube socket, and went ahead and got a new yoke really because the old one is falling apart anyway, dried up plastic, and the yoke made no difference either. what could be left to raise the cathode current and starve it for hv. being everything i disconnected it dont leave much more but maybe the drive to the hot for the fly if this is possible, would the cathode current raise up and not have enough hv if the drive were to slow or just not at the right frequency because of a bad cap,and where would i look for this cap if it were a possibility.............

timmy
01-26-2012, 07:30 PM
well this is it , 12kv only and cant get anymore from it. and even if my hv probe is off alittle it still has low hv. now the vert is having a hard time locking in.

ctc17
01-26-2012, 10:13 PM
Im fighting a rca that has a simular issue can only get 20kv and thats not enough for the regulator to take effect so the picture is unstable.

Ill tell you this...there is NO WAY that picture is comming from 12kv. NO WAY!! If you only had 12kv the focus and boost voltage would be so low and the thing would be blooming so bad it would be a smeared out blured mess.
That is a good picture.

timmy
01-27-2012, 07:03 AM
this is what i have been saying that it gives a good picture but the g1 master is only up a quarter way because it will bloom and wash out to nothing as well as the contrast if turned cw and the g2 adjustments have to be on the low ccw side. anything that effects the hv has to be set low and im sure this was not like this from the factory in 1966.it wound out being the 4.7k resistor in the yoke that was giving the lines on the left side of the picture. if i were to raise the g1 master it would bloom and pull to the right and leave the left side 3 inches gone. so it still has low hv and why i just dont know and maybe my hv probe is not right but if it were, well it would show how low it really is. now i have to figure out why the vert wont lock.

sharejutt
01-28-2012, 04:05 AM
Convergence problem on an rca 52 inch tv?