LG protection tv model no RT 62NA31RP convergence problem i have replaced stk 392-570

SOURCE: sony kp-51ws510 51' projection tv

There are resistors that need changing and maybe small fuses.

SOURCE: hitachi 65xwx20b convergence

Your message says you "replaced stk392-150", did you replace both of the stk`s or just one of them??? One is for RGB vertical the other is for RGB horizontal, you should always replace both stk`s as a set, Hitachi recommends you use a "replacement kit"
part number X480306", this kit includes both stk`s with a new & supposedly improved set of stk`s as well as all resistors that are required for proper set-up, they strongly recommend you change all of the parts in their kit. The only other thing besides IC`s & resistors that could cause your problem is:
1) bad dcu output (you need a scope to check this)
2) you`ve lost either the +15 volt line or the -15 volt line to the IC`s, "Fxxx" chemical fuse open in power supply.

Sonny Berry

• 8617 Answers
• Posted on Aug 10, 2008

SOURCE: sony projection tv convergence issue

You will need two STK392-560 Convergence ICs and you will also need two of the 3.5 amp pico fuses as Sonys will always blow at least two of the Pico fuses. You can get replacement ICs and Pico fuses at the fiollowing link and they provide free instalation instructions. Heres the link.
http://servicemanuals.vstore.ca/

SOURCE: HCM4216W...replaced convergence board...still no

Do not take this the wrong way--I have seen several people make this kind of mistake--why on earth replace the board when you can buy the pair of chips for under 15 dollars?

At worst--there will be other than the chips a fuse on the board near them bad...

Look at the old board if you have it--this model should use STK-392-040 chips--I can tell you a seller who has them on EBAY---my point is these sets it is almost always better to just replace the chips and fuses if needed--

Do you have the old board? Can you return the new one for a refund?

I have repaired hundreds of sets with convergence problems and only a very few needed to have the board replaced.

I understand why this happens--people think it is easier to replace a board but they are wrong--it always costs more that way and presents problems.

Give me as much info as you can and those chips are readily available. I can tell you name of the seller I buy mine from--got several of the chips your set uses on hand right now.

If this helps you rate this solution as I do this here for free.

If you have questions or need any help ask me--I am here to help.

SD TECH