hi to all,
my tv quit working !!!!! when turn it on, all what i got is a dark screen with beeping noise
last year i was able to change the convergence ic, and it was working great, but now it is not.
any ideas where to start please .
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Where did you buy your parts. My guess is that you bought your parts from a vendor that is not selling the most reliable parts and you have another convergence failure. Read the first ten posts of the convergence repair sticky linked below very carefully.
I'd be willing to bet lcaillo is correct - the chips have failed again. The beep might be what's being referred to as a chirp and when I do some searching with the model number as 9303 instead of 9503, I find that to be the cause most often.
thank you so much guise for your quick answer :wave:
and sorry for posting at the wrong area.. i guess i am blind, as i could't read the model number correct.
first of all i bought the ic off ebay. which i am sure it is not original parts, it was cheap price. i was afraid i can't do it my self. but if this is the case i ll buy new ic from an authorized dealer. but i thought the convergence board will not display a black screen !!!! it will display a bad picture, but i have no picture at all, power light is on and beeps. i ll change them and post the result very soon.
thank you again
If you need a source for the chips check MCM electronics - I have ordered from them previously and they are on the vendor list on this site.
You may want to look at ordering the entire kit instead from tvrepairkits.com HERE. I've since only ordered the entire kits as I don't have a supply for resistors and pico fuses (etc) locally and it's just more convenient to have it all in one kit (comes with heatsink compound as well).
I have repeatedly said that there are only a handful of vendors who have not had problems with the quality of their chips from time to time. MCM is not one of them, IME. TVRepairKits at one time bought their chips from the vendors that I have recommended, but according to those vendors no longer do so.
Many consumers and techs have wasted their time on cheaper parts. Just buy them from the recommended vendors, B&D, Acme, or Electronica of Denver (not Electronix). Follow the details of the convergence sticky carefully, and check and recheck everything.
Ahhhhhhh! - I'm sorry lcaillo, I was trying to help and was making it worse for this guy. Thanks for keeping up on the threads and keeping those that know just enough to be dangerous (like me) from leading others astray.
I'll be more careful in doling out information in the future and keep trying to help others solve their problems by searching the forums and net for solutions that have already been found.
i toke the convergence board cable out out (that one coming from the power board) turn on tv, but nothing at all
so i think my tv can't work without the convergence board on. now i have the board out of the set, mi ic is STK-392-120 i don't think it is sanyo, anyway reading Icaillo post he mentioned that STK-392-160 is a superior sub for my STK-392-120, do you think i go ahead and order 160 ?????
I don't think I ever said that the STK394-160 is a superior sub for the 392-120. The -120 is a 4 amp chip, and we don't know about the -160, but suspe3ct it to be a 3 amp chip. What I have said is that unless you know specifically that something is a good sub, and know specifically WHY, one should stick with the original part. When there is ANY doubt, DO NOT make substitutions.
Again, read and re-read the first ten posts of the convergence repair sticky.
Sorry, that is a mis-statement that needs to be corrected if it is not made in a context that applies specifically to the Hitachi sets. Hitachi does replace the 392-120 with the 394-160, but the -120 was used in only a few cases in circuits that did not need the additional current capability. They were trying to avoid the use of the -110 which proved to be a problem in many brands and models.
That should have read most "Hitachi" sets. I have corrected this. A few lines above I make it clear that this may not be a good sub for other brands. In practice it works in many cases, but there may be some differences in the muting circuits and in the power rating that are not well understood.
It is important to read the entire text of the first ten posts and understand the context. I try to make sure that there are no incorrect information, but mistakes do happen.
cause you still patiently addle: helping me without giving up on me,
i hope this will be my last question, do you recommend buying from tv-repair-kit ?
i see they have a kit for my tv, including the 2 OEM Sanyo Convergence Chips, and the Convergence Resistors too, there price maybe little high and i am on budget but i have to do what i have to do.
i am waiting for your answer before i make my order.
Some have reported good results from them. At one time they bought their parts from one of my preferred suppliers. They do not any more, and I would not trust them. The only suppliers that I use are Acme, B&D, and Electronica of Denver (specifically NOT Electronix). If you use any other vendors you are much more likely to get bad parts at some point, IME, which is quite extensive. As supplies of the original parts get smaller, the numbers of copies as a portion of the market increases. I do not take chances with other suppliers.
I FIX IT,
thank you all for you help,
special thanks to Leonard Caillouet and CVinje, without you i would never been able to do it
it is very important to get the original parts, once the 2 ic, and 12 resistors soldered on the board, picture came excellent no need to do any manual convergence, thank you again.