Question about Apex Digital GB55HD09W 55" Rear Projection Television

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APEX DIGITAL GB55HD09W

The Television wouldn't power up. After reomoving the power supply board I noticed a large burnt hole behind it. I ordered and installed a new power supply board but still cannot power up the televison. Any help would be appreciated

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  • valley girl Apr 18, 2008

    Same tv, same problem. I replaced the power supply and got it to work for a couple of weeks. The tv shut down again. The repairman showed me that the power supply works but it is not sufficient to get the tuner to turn on. We are looking for a repair manual for assistance.

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3 Suggested Answers

Slinteriors
  • 8617 Answers

SOURCE: problems after new ic chip install

Did you check for open resistors in the convergence circuits? Often that is what happens when the old ICs wear out it will cause a couple resistors to burn open, and they show no outward sign of being bad. Also double check the IC pins connections for solder bridges thats another common problem, I always use a magnifying glass to double check my solder when ever I do convergence or any IC work where the pins are close. But with the streaks youre describing I would think maybe resistors.

Posted on Jun 16, 2008

  • 2 Answers

SOURCE: apex gb55hd09w

you need two STK392-020 - 3-Channel Convergence Correction Circuits. they run anywhere from $10 to 40, then either you or electronics shop solder them in

Posted on Apr 05, 2009

judojuan
  • 1 Answer

SOURCE: Access Convergence Menu APEX GB55HD09W

Try changing the input to something other than component video, like AV1 or F AV

Posted on Jan 22, 2012

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APEX GB55HD09 remote control


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Feb 16, 2012 | Apex Digital GB55HD09W 55" Rear Projection...

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I have this TV and have fixed this issue. If you cannot adjust Red or Blue convergence, then your STK ICs are defective. The signal board or Digital convergence board is not able to adjust sig lines on the deflection board so pushing buttons does nothing. The STK's are your amplifiers for vertical and horizontal. This will require dissassembly and soldering. You'll need 2 STK392-020 IC's and 125v/5A pico fuse or buss fuse..

The STK's are mounted on 2 massive heatsinks. Can't miss it. Word of advice, LABEL the 3-4 Pin plugs B,G,R from left to right. These are your Vertical and Horizontal coils for each tube. Don't mix them up. I did and the tv survived luckily. Chances are if your STK's poped, then they took out the -25v line. Take out the power supply that is mounted vertically on the right. Look for a row of axiel lead fuses with "SOC 5000" printed on it. They look like white rectangular blocks with leads. Check them all. Particularly RF817. Sits next to RF814. The service manual lists it as a fuse and NOT a Resistor-Fuse like the label suggests. I found more than one typo like this. I replaced mine with a generic 125v/5A fast blow buss fuse. Soldered in a holder for it. Should work the same.

Took me abit to realize it was a fuse on the power supply. This -25 line traces to W057/W058 next to the first STK chip. Explains the symptoms.

May 12, 2009 | Apex Digital GB55HD09W 55" Rear Projection...

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Apex gb55hd09w


you need two STK392-020 - 3-Channel Convergence Correction Circuits. they run anywhere from $10 to 40, then either you or electronics shop solder them in

Oct 18, 2008 | Apex Digital GB55HD09W 55" Rear Projection...

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1 Answer

Problems after new ic chip install


Did you check for open resistors in the convergence circuits? Often that is what happens when the old ICs wear out it will cause a couple resistors to burn open, and they show no outward sign of being bad. Also double check the IC pins connections for solder bridges thats another common problem, I always use a magnifying glass to double check my solder when ever I do convergence or any IC work where the pins are close. But with the streaks youre describing I would think maybe resistors.

Jun 16, 2008 | Apex Digital GB55HD09W 55" Rear Projection...

1 Answer

Converence ic


If you go to the following link you can get new replacement ICs and they provide free instalation instructions as well as free instant messageing tech support so you can do the job yourself and save quite abit of money. Heres the link.
http://servicemanuals.vstore.ca/

May 25, 2008 | Apex Digital GB55HD09W 55" Rear Projection...

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