Samsung HCN4226W 42" Rear Projection HDTV-Ready Television Logo

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Posted on Aug 16, 2007
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How to axces convergence mode.

Hcn4727w convergence problem

  • Anonymous Dec 13, 2007

    trying to find how to access the service menu on a samsung hcn4727w

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  • Posted on Aug 17, 2007
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Joined: Jun 26, 2007
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Covergence is a very common problem with big screens and the longest to work on and adjust back to a nice picture. its really an art to converge, that takes years of practice. accessing the convergence mode is usually found on the menu button on the remote or on the set. use the remote so you can stand back too see everything. good luck

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1helpful
1answer

Replaced convergence ic's and picture is good but still no blue color to adjust in the convergence mode. the blue bulb is lit in back.

You may have pressed a wrong button when in service mode---it allows among other things to turn individual colors off like Blue--to make it easy to adjust red to green first.

Also take a look with set on into the Blue lens to make sure you have a image and it does not look like a blue flood light.

a last note: if you tampered with the lens (they have a wing nut on side that allows them to be turned you may have on the blue turned the lens so far there is no focus---for that lens--Did you?
0helpful
1answer

Blue green and red not in line. how to solve

Thats a convergence issue which is caused by the convergence amp board needing repair. The samsungs with the P55A chassis such as your model usually require replacing the convergence amp board which is a simple unplug old board and plug in the new one repair. You can get the convergence amp board for your model from www.tvcircuitboards.com
0helpful
1answer

HCN4727W with Convergence issues

Mike,
The ICZ designations on that board are two Sanyo STK392-040 amps used for convergence. Rz142 through Rz145 are the yoke return circuit are 3.9 ohm 1/2w resistors. CZ140 and 141 are two electrolytic radial 22mf/50v caps in the feed circuit for those amps.
My question would be - and I've NEVER seen this, in my 30 years in electronics, what caused such a domino failure? The amps are basically LV fed by a +/- 24v line input. If the yoke(s) were to short shouldn't cause enough feedback to destroy the convergence board in the manner you've indicated here. That's a P58A chassis used in several models of the Samsung and Akai designs. Only trouble I've heard of with those boards are cooling and most techs have taken to installing cooling fans directly on the board, driven by the +/- 20v line. That drops the temp several degrees and allows the amps to operate at a much cooler temp. We rebuild those boards here on a daily basis and add the mods for greater reliability. But other than that the P58A is considered a bullet proof chassis.
Hope this helps!
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993
0helpful
1answer

HCN4727W Convergence issue

Repalce STKs with 392-040 resistors should be 3.9 ohms,also you might want to join Repairworld it is for members who have TV shops over 7,000 different shops / lots of good techs there.They will not put up with anyone just looking to repair there own tv .Sorry unable to help with cz140,141.will do some checking you also can order whole convergence board.
0helpful
1answer

Blowing Convergence Amp Boards

either the DCU Digital convergence Unit or the velocity board are most likely the fault.
0helpful
3answers

Samsung HCN4727W

Convergence board shot. Cheap to fix yourself, board has two STK chips on it and is easy to get to.
0helpful
1answer

Samsung HCN4727W

Replace convergence amp IC's = tech skill required.
Then activate auto focus...............T.

Let me know if you want step-by-step help....................
0helpful
1answer

Red ghosting

pretty simple, unplug the power, ground, red, green, and blue plugs...unscrew the entire board...replace with the new parts...put it back in...
0helpful
2answers
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