Hi guys,I have a problem.I started with dim picture i resolder everthing no avail. then turned up g2 have enough bright but get bad poor covergency on greens. when i turn down the G2 to the rihgt level where i can get a good pic and convergence,then when turn off set then turn back up again the pic is dim or without bright,i have to keep the G2 a litle bit higher thus degrades the green convergence,I don't have sckematic, i suspect either FLY or IC TDA6108 Video Amp, any ideas thanks in advance.
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Re: RCA ATC113AA.F20TF20 G2 Problem
Adusting these stuffs needs a special equipment like the color pattern generator. u cannot just adjust this manually. try to inspect the crt circuit board see if there is an open resistor there. u have a luminance problem
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RCA has had rough time with bad grounds with units similar. You will have to have someone resolder the vertical IC, resolder any grounds on the Flyback and any other IC with heatsinks attatched to them. Also, have them resolder the the yolk connections located on the rear of the picture tubes. This is where you will see two connections that look as if they are weak solder grounds. Good grounds are very important to get your TV operating again! I cannot say enough...have the repair person look at all connections on the bottom of the board and shotgun with the soldering!!! Good luck and thanks for asking!
Try adjusting your focus&screen control Block-R/G/B 3 on top are focus and 3 on bottom are screen drives to the Tubes R/G/B you will have to remove front Panel on TV thats where the control Block is. You need to also resolder (FBT) flyback Transfomer Pinns.
Yes you could look for the capacitor that is leaky, probably in the 200v line, or you could just open back and turn up G2 screen control on the Flyback. You have Screen and Focus on this black transformer with a long anode lead going to the picture tube of set. Becareful, High Voltage!
Did you adjust the two controls on the new flyback? The top one is almost always the focus control and the bottom is the G2/screen control (brightness) If you adjust the G2 do it until the picture looks normal, too high and you will get retrace lines through the picture.
In my case, the adjustment was available from outside the TV. Sortof. On the rear of the TVabout 2 inches to the right of the coax in, there are two vertical slits on a little protrusion. Inside the slits are the two adjustment screws. The lower screw adjusts brightness, the upper screw adjusts focus.
I spend 30 minutes popping the case apart just to find that I could not access the adjustment screws from inside. Lo and behold, they made them easily accessible from the outside. On a side note, I have never seen a TV designed as poorly as this on the inside. You have to literally reach in and unplug things just to get the back off. All the electronics save the tube itself are mounted to the rear chassis. On all other TV's I've seen (taken apart, rather), all the electronics are in the FRONT part of the chassis so that they move WITH the tube.