Question about JVC AV-27530 27" TV

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Brighteness brightness cranked up. Still picture too dark. Can any one help? What is the g2?

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Re: brighteness

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.

Posted on Oct 05, 2006

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Re: brighteness

G2? Grid 2. Also known as Screen Electrode. And to adjust G2, just open rear of set, and carefully adjust a control on the FBT (what is FBT? Fly Back Transformer. It is a Black Block with a couple of thick cables, one leading to the Picture tubeand another leading to the Picture Tube Circuit board.It also has two controls - Focus and Screen)) You should adjust G2 (or Screen) voltage as per the instructions given by Techman.

Posted on Sep 25, 2006

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Re: brighteness

You have a drive problem then or the G2 on the High voltage trasformer is set to low. if you really want to attemt to adjust the G2 then lower the brightness and contrast to middle of scale. remove back, and adjust the lower knob on the high voltage trasformer clock wish tilkl the picture gets bright and you see little white lines in the picyure, now turn back counter clockwise till those little white lines just disapears. now the G2 is adjusted right. If then you adjust your set and its still to dark, you have a video driver problem and are going to have to seek out a pro to assist you in this repair.

Posted on Sep 24, 2006

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