Red on LG rt-54na21t convergence out of line now

SOURCE: 43H70 Blue Convergence out of line and will not line back up

If the blue colors will not line up, and the blue appears to sag inward from one or more sides, then you can bet that one of your convergence IC's has either cracked loose or burned out. The IC should be resoldered or replaced and the convergence realigned by someone experienced with projection TV convergence circuits.

Sonny Berry

• 8617 Answers
• Posted on Apr 16, 2008

SOURCE: Mitsubishi Projection TV HD1080

you need to replace your convergence ICs. Post your model number of your set, and I will post the correct stk numbers and a link where you can get new ones.

SOURCE: lg rt 56nz23rb

Hi there.

Replace the stk convergence ics and also the 3.9 0hm fusible resistors.

SOURCE: Convergence is off - Blue and Red are fine Green will not line up

On most units, the Green is constant and the Red and Blue are adjustable. Here are 2 links on how to manually adjust the convergence. There is a menu option using the remote control. Once there, you will find step by step procedure on how to adjust the convergence. Hope this helps answer your question. All the best!
Greg

http://www.fixyourowntv.com/menumitsubishi.php
http://www.ehow.com/how_2034880_perform-convergence--tv.html

SOURCE: Unable to move the blue and red convergence lines to the green

If red or blue will not move this model uses two of the STK-392-110 CONVERGENCE CHIPS.

Both chips along with any of the 8 or 10 protect resistors around need to be replaced--the parts are cheap--you can buy a pair of the chips on Ebay for less than 14 dollars plus shipping and the resistors are easy to test and or replace if gone.

Total parts cost should be under 30 dollars.

The hard part of this repair in your set is getting at the chips to replace them---most of these sets you have to unbolt the entire chassis--you will have to mark and unplug several plugs---so that you end up with the bottom of all the boards facing the back of the set.

Both chips are black in color--2 1/2 inches wide and 1 1/2 inches tall with 18 pins each--you need to be able to get at them, un-solder them and replace them.

They usually are near the middle of the boards and are on two large metal heat sinks with fins side by side and will have the STK-392-110 PRINTED ON THEM IN WHITE.

The resistors are dark gray in color an are usually 1.8 ohm in value---they can be tested with a meter---like checking a fuse--one with no reading is open. They usually do not burn or discolor in this set.

Most of the time just the chips need to be replaced and then the set adjusted--you will get ok results in the customer menu and if you get it working I can give you instructions to get into the TECH menu for fine adjustment all over the screen.

I am willing to step you through this repair if you or someone you know can do it---I will tell you all the things you need and give general instructions depending on where you find the chips are located in your set.

This repair usually takes me less than 1 hour, but I have done hundreds of them---someone else here with a similar set and problem I helped recently was able to do this repair--it took him over 2 or 3 hours since it was his first time.

If you cannot do the repair let me know and I will give you options.


If this information helped you, rate this solution as I DO THIS HERE FOR FREE.

SD TECH