Question about Samsung HCL4715W 47" Rear Projection Television
The tv was found with a note attached that reads "convergence needs fixing, and when i turn it on i can hear audio but no picture at all except dark black in the center and regular blue on the left and right sides.
SOURCE: how to realign the picture tubes
You should NOT need to re-align the crts to correct this problem... Chances are the failure is in your convergence circuit and most likely the convergence amps, (IZ103 & IZ104)Samsung p/n#AA62-30173D which may be substituted to an original STK394-250 and you'll need two of those. (Make sure they're not cheap knock-offs).. You may also want to test the resistors feeding those amps for change in value. And if I've lost you with any of this take the set to a qualified tech for the reapir - - you'll be money ahead... Under no circumstances should you need to change or alter the CRT placement. Chances are better for you winning the lotto three times in a row than it being a placement problem...
Posted on Jun 01, 2007
the lines that move are the from the auto self focus on the tv. I have the same model. go to menu and then setup and you can turn the self focus off. The only problem I have with mine, is after the tv is on for about twenty minutes, the convergience is misaligned on the left and right sides of the screen, I am currently trying to figure out how to fix it.
Posted on Jan 26, 2008
The Convergence ICs will need to be replaced , 95% of the time thats the problem they are on the sub board not the convergence board. You will need two STK392-040 ICs . you can get replacements at the following link and they will provide free installation instructions along with free on-line tech support when you install them. takes about 45 minutes. Heres the link.
Posted on Apr 21, 2008
SOURCE: Blue Convergence
Hello All Above,
Your one and only problem is a bad convergence Amp board. Changing it will fix your set. You can contact http://www.interactiverepair.com for step by step assistant with installation of this board.
List price $100
Part Number: BP95-00142P
Posted on Jun 22, 2008
These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.
When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.
Here are some of the most common problems with these sets...
Problem #1) Convergence
Yours may have one or more of the following symptoms...
*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound
Problem #2 - Another common problem is dull or washed out video.
Your set may have one or more of the following symptoms....
*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture
You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull
Posted on Apr 22, 2010
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