Question about RCA D52W20 52" Rear Projection HDTV-Ready Television

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APEX GB65HD09W Convergence Issue!

I have an Apex model GB65HD09W television. The convergence began going out and I found on the internet how to re-adjust the convergence on the set. followed the steps mission accomplished.... for awhile maybe a week. Then convergence would click out we'd just ignore it and in a matter of an hour or two it would go back in. Finally. now it goes out.. I can tap on the lower front panel and kick it back in every time it goes out. so far knock on wood. I contacted my local dealer whom I purchased the TV from (aprox 5 yrs ago) and is also a service repair shop hates dealing with APEX as they have a horrible time getting parts for them. I was quoted a $75.00 diagnostic fee and then based on description of the problem a convergence module for a bill of $300 - $500 if that is all they find wrong. My question is... is this a fix I can peform myself and if so.. how?

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Re: APEX GB65HD09W Convergence Issue!

You need to re-solder the circuit board that contains the STK convergence modules. They're on the center circuit board attached to an aluminum heat sink that's about 8" long and 6" tall, about dead center in the circuit board. You may be able to recreate the problem by gently moving the heat sink (which the modules are connected to). This is an indication that the modules pins aren't solidly connected (meaning soldered) properly. Remove the circuit board and clean the old solder off & resolder the modules pins to the circuit board reconnected the board and then retest by again pushing on the heat sink. This is a caused by a minimum effort (a.k.a. minimum cost) solder job, probably done in some 3rd world sweat shop. The "factory" job was good enough for 3-4 years but the heat (and these modules do create a lot of heat) and stress created from repeated use eventually takes it's toll, weakens the pin connections and our problem occurs. take the appropriate cautions working around the high voltage of the set & use a non-conduting piece of wood to push the heat sink when we doing tests.
Best of luck, hope ya fix it.

Posted on Jan 18, 2008

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I have an apex model, GB65HD09W with convergence problems. I have already replaced both stk 392-020 chips Is ther a fuse or resister feeding the B= to the chips? I checked all the resisterts in the area.

After a repair to convergence circuit, you should do the convergence adjustments. If you wish to get more details about this, check the site linked here. it is difficult to type in all here by this window.
Selecting the view option, either to Mosaic / Time slide, can be selected by the drop-down list, at the top left of the display window, will make surf easy. You can also do a search, by type in the brand name/model number/IC used, in the search box at the top right of the display window.

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replace the convergence ICs very common problem for all rear projection Tvs that develope a convergence control issue.

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Please have it taken care of ASAP. It definitely sounds like Cold Solder joints on the convergence IC's. Cheap repair now, if you stop playing it. Every-time the convergence goes out, the ic's struggle to bring it back in and can't and therefor over heat. so please have it taken care of Pronto. Apex used a Samsung chassis which was a good chassis in that PTV.

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My apex gb65hd09w has power going to it but it is not coming on no fuses appear to be blown is there some manual rest on this device.

Pull out Power supply board you will find Poor solder connection around the tyrisitor..And maybe a BAD capacitor 100uf 250v?

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Convergence IC's

Lines going across is a little vague but there is always the problem with the electrolytics (caps) around the vertical, be sure and get the one on the power supply too. Just change all you can find(usually 4-5). Thre are 2 convergence ic's if you didn't change them both, resolder the other one.
Then check the value on R519 for me.

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Convergence IC's

I would bet its convergence ICs under 20 bucks at most electronic parts stores. Usually though the ICs take out a couple resistors with them when they go.

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1 Answer

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Try resoldering the convergence chips.

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