Question about Samsung HCM4215W 42" Rear Projection Television

3 Answers

Samsung hcm4215w Convergence board problem

I have a Samsung projection tv I'm trying to fix. It wouldn't stay on originally. After searching this forum, I tried unplugging the convergence pcb and turning it on. It would stay on when the pcb was unplugged. I ordered two new stk392-040's from mcminone and soldered the new ones in. Now when I power up the tv, the new IC on the right gets really really hot immediately. The heatsink gets so hot you can't touch it. The tv powers itself off after about 30 seconds. I double and triple checked my soldering job and all looks good (I have some pcb soldering experience). I can't find any suspect components on the board visually. Did I get a bad IC or is there something else that went bad? Thank you

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  • jimmyjet Sep 28, 2007

    Ok, last night I removed the really hot stk and reinstalled one of the old ones. I got a picture and the convergence board ran considerably cooler. However, the picture was badly bowtie shaped and couldn't be adjusted out with the convergence menu. The colors also don't line up.
    Should I purchase a new convergence pcb, new panasonic stk's, or try something else?
    Thank you for any tips.

  • jimmyjet Oct 17, 2007

    The problem was solved by purchasing a new convergence pcb.  I must have gotten some bad stk's initially.  Thank you for all the help.



    jim



     

  • IBFLYONE Nov 11, 2007

    This is the part that is broken in my set. Does anyone know how to identify it? And where can I get a replacement?

    Thank you

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3 Answers

I found my convergence board on ebay being sold by partsstore.com. try looking there.
jim

Posted on Nov 07, 2007

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Hello all. New to the site. I was given this tv with the exact same problem. I would like to know the details on the parts in order to fix mine. I am no tv expert. Any assistance would be very appreciated. Thank you
Van

Posted on Nov 06, 2007

  • IBFLYONE Nov 07, 2007

    Hello again, Could someone send me the site and part numbers so I may fix my tv thanks.

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Use PANASONIC STK's.They are expensive,but they hold up!Safe,durable repairs require OEM or BETTER quality replacement parts.

Posted on Sep 27, 2007

  • Vista Electronics Oct 17, 2007

    Use Panasonic IC's.---T.

  • Vista Electronics Oct 17, 2007

    PS. Don't forget to check the pico fuses after installing good IC's.

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1 Answer

Picture seems to be offline( curved down) also everything seems doubled and you can see the red, yellow and blue colors of the lenses on the screen


Tv have a problems known as a convergence problems it is dead.Tv have colors lines R,G,B mis alignments,have colors shadows pictures or 3D pictures look alike?Yes,than the board that call the convergence board it is dead.This convergence board require service must be replacing parts 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board,to solved the tv picture convergence problems mis alignment.The tvs shops,will cost u like around $300-350 for parts and labors.

May 28, 2011 | Samsung HCM4215W 42" Rear Projection...

1 Answer

Samsung 42" rear projection HD tv issue


pico fuses are those small on board fuses, usually soldered into place, that protect important parts of the board.

Feb 26, 2008 | Samsung HCM4215W 42" Rear Projection...

1 Answer

Samsung HCM4215w has wavy red lines and bowtie effect


Are you saying that after installing a new convergence board, you still have the same issue? If that's the case, another new board isn't going to resolve this. Also, you can't do a factory reset. Doing that would lose all the convergence and geometry data in the TV and would require a qualified technician hours of work to restore the settings. If you've installed a new board and have the same problem, suspect a problem in the TV's power supply. All convergence circuits require 2 voltages to operate. There will be a postive and a negative voltage of the same value. If you're missing either of these voltages, your convergence will never work properly.

michtech

Feb 17, 2009 | Samsung HCM4215W 42" Rear Projection...

1 Answer

Red Convergence Issue( Samsung HCM4215W)


Bad chips or faulty soldering.

Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
Example Photo:
5f6e85c.jpg
Problem #2 CRT Fluid has clouded over.

Symptoms


  • Dull Video, Washed out
  • White/Bright looking video
  • Halos around objects
  • Red/Orange looking
Example Photo:
ee1ca68.jpg

You can see more examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Dec 23, 2008 | Samsung HCM4215W 42" Rear Projection...

1 Answer

Red Convergence out on right side of the screen only


Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
Example Photo:
5f6e85c.jpg
Problem #2 CRT Fluid has clouded over.

Symptoms


  • Dull Video, Washed out
  • White/Bright looking video
  • Halos around objects
  • Red/Orange looking
Example Photo:
ee1ca68.jpg

You can see more examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Dec 08, 2008 | Samsung HCM4215W 42" Rear Projection...

1 Answer

Ghost like shadows


It seems your TV Samsung HCM4215W has problem in convergence board and need to be replaced.
You can get that board from Parts Store on $76
If you have bit electronics knowledge and know how about tv repair, you can replace it by yourself or get help of local tv tech person.

Oct 06, 2008 | Samsung HCM4215W 42" Rear Projection...

1 Answer

Samsung HCM4215W


Unplug the power.

Remove largest plug from convergence board. Plug in TV, see if it starts. If it does, then a convergence IC is are shorted.

Repair convergence

easyab

Jul 28, 2008 | Samsung HCM4215W 42" Rear Projection...

1 Answer

Replaced convergence brd but now picture goes dark and audio stays on


I would suggest to go back and make sure that all the connectors are firmly inserted in their respective plugs.
Let me know if you need further assistance.

Apr 09, 2008 | Samsung HCM4215W 42" Rear Projection...

1 Answer

Tv wont turn on


Further, I've replaced the convergence board, but that didn't fix it either.

Nov 05, 2007 | Samsung HCM4215W 42" Rear Projection...

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