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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Never tune G2 voltage too up to a state, to appear retrace lines on screen. it is bad. It might make the CRT damaged. Check the video output card, and the voltages comes to it. This card can be located at the neck of the picture tube itself, will directly plugged to its back of the neck. Reduce the G2 voltage, in such a way that, there is no retrace lines appear. Be careful. To get some details, http://electronicshelponline.blogspot.com/ Pull up older posts
remove back panel of set look at the pcb boar conecting to the crt, look for a wite or black ajustment knob not all sets have them but most do, it called the g2 seting turn up your g2 a bit pic should come back the sad thing is this meens you pictortube dosent have much life left in it.
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.