I recently found this forum and installed stk392-150s in place of my 110's. Then after installation, a few resistors were blown so i replaced as needed. Now I am in a predicament. I replaced RK 42 and RK 62 but they continue to blow. I might have the wrong size or something, but according to my notes RK 42 = 3.3ohms and RK62 = 2.2ohms (both 1W). I had the wrong size on the RK62 at first and put the right one in after and it blew as well. The 42 might have been wrong from the beginning but I dont have a 3.3ohm resistor to check that.
Why is the RK62 blowing when I start up the TV? Any ideas? Oh and when I went to play with the convergence, its even worse. NOTHING will move now, as opposed to after I fixed the ICs I had full range with green, left and right with red, and nothing with blue. Now i have NOTHING. Any help?
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Re: Convergence repair problems.
Alot of people make the mistake of putting two STK392-150 Ics in the Hitachi , and most times it will not work unless you change all the convergence resistors.. If youre going to upgrade hitachi to anything other than the stock ICs, it is recomended by Hitachi to use the STK394-160 ICs but then you have to change the ratings on the resistors. You can get the upgrade kit for your hitachi at the following link. http://servicemanuals.vstore.ca/
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install the convergence repair kit. Its takes 2 STK392-110 Convergence ICs and you will need a few of the 6.8 ohm resistors. You can get the DPTV305 -DPTV345 convergence repair kit which also applies to your model from www.tvrepairworld.com which has the parts and the CD with instructions and the Kit has the STK392-120 ICs which would be a better set of ICs for your model.
If model number is
AV48WP30 go into the customer menu and select CONVERGENCE---if Red or
Blue will not move in some direction one or both of the two STK-392-110
CHIPS this set uses for convergence is bad.
What happens is the
convergence chips are black in color--about 2 1/2 inches wide X 1 1/2
inches tall with 18 pins each----the back of each is metal--when they
are installed(each is mounted to a metal heatsink to keep it cool) they apply a white grease to transfer heat quickly----
After some years the grease dries out and one of the chips overheats and fails.
Not a real hard repair to do if you are handy and know how to solder----
shops are going to charge about 300 or more for this
repair-----considering you can buy all the parts for under 25 dollars
if you or someone you know can do it you can save a lot of money.
I can give you general instructions for this repair on this set.
I have repaired hundreds of sets with convergence troubles--very common problem.
Sure, Stk392-180, I use them all the time instead of the 110 and 120. Was your convergence out and that prompted you to replace the Stk's? If you had a picture before ( but bad ) I would check for the 6.8ohm bias resistors. They must be on the money, if not, they will destroy your Stk's in a heart beat. They are all located right buy the Ic's all in a row. Don't forget to clean the heat sinks off then apply a bead of Heat Sink Compound across the middle of the Ic's before installing them. the resistors may not be the value I stated, so measure a few, that will tell you,
You need two STK392-110 ICs and the six feed resistors. You can get the complete kit at the following link which includes both Ics and the resistors along with step by step instructions on how to do the repair. The Kit you need is the Panasonic convergence repair kit type1. Heres the link. http://servicemanuals.vstore.ca/
Check convergence adjust screen after picture distorts.
Description sounds like shading from a defective convergence circuit. If you replaced STK392-110 with 150, then re-install new 110's, or new 150's and re-design the circuit and change low-ohm resistor values to compensate for different IC's. It is not the same as a brighter light bulb.
(2) STK392-110 Convergence Amp ICs
(3) 220 ohm 2watt metal film resistors
(3) 150 ohm 2watt metal film resistors
(2) 1.5 ohm 1watt metal resistors
(2) 2.2 ohm 1watt metal film resistors
(1) 1.8 ohm 1watt metal film resistor
(1) 3.3ohm 1watt metal film resistor
You can get the entire convergence repair kit which contains all the parts listed at the following link its called the AV48WP30 Convergence repair kit , but it applies to your model as well, and they include free installation instructions. http://servicemanuals.vstore.ca/
sounds like the convergence ICs and resistors due to the double image. You need two convergence ICs both STK392-110 ICs and the following six resistors. (2) 3.3 ohms 1watt resistors, (2) 1.8 ohm 1watt resistors. (1) 1.8 ohm 1watt resistors. (1) 3.9 ohm1watt resistor. You can get replacemnet ICs and resistors at the following link and they provide free instalation instructions so you can do the repair yourself. Heres the link. http://servicemanuals.vstore.ca/
You need to replace the convergence ICs and also a few of the 6.8 Ohm 1 watt resistors as that model will usually burn about 4 of the resistors. Your ICs are STK392-110 you need two of them. You can get replacements at the following link and they also provide free instalation instructions with pictures so you can do the repair yourself. Here's the link. http://servicemanuals.vstore.ca/