I just wanted to post that I was able to purchase the IC units and tested all resistors on this Philips TV and fixed 1 of 5 that we found in a storage unit.
The convergence was the problem and I was able to carefully label each wire and connector before removing the board. Then after I removed the board (finally) I desoldered the ICs, removed them, and soldered the new ones in. I tested the resitors and they tested at .4ohms each, they were fine.
Reconnected and reinstalled board. Tested all lines with a VCR, instant success, converged on it's own. Doing another one tommarow, wish me luck!
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1) Faulty Lamp 2) Vertical/Horizontal Output IC 3) A Shorted IC driver 4) Blown fuse 5) Open resistors around the fuse
Keep all of these in mind and I would test the IC's first with a multimeter,IC's are transistors,usually having 3 legs and screwed into a heat sink,if they read 0 they are shorted. Also if you find something has gone bad,look around the component to see if there is an underlying problem as it will be frustrating and more expensive to find out after the first replacement.
The problem is that the ICs may have been blown because the resistors were bad. Just as a double check before you replace anything else. Please confirm that the STKs are STK392-110. Also, replaceing them with STK392-150 is a valid upgrade, I'm not sure about the 180s, but I'll check. Both the STKs and the resistors need to be changed at the same time.
The hour glass view you reported: Was the bowing on the top and bottom or on the sides?
yes the convergence ICs need to be replaced they are both STK392-120 ICs and you will also need four 6.8 ohm 1 watt resistors you can get replacment ICs and resistors at the following link and they provide free instalation instructions with pictures and free on line instant messageing to help you do the repair yourself. Heres the link. http://servicemanuals.vstore.ca/
one of the resistors must be open, you cant always tell by looking if theyre open you have to remove one leg out of circuit then test them for resistance they can only be 5% out of tolerance, any more than that and they must be replaced.
I fixed this very problem several times on this set. You must check some parts and, if bad, replace them correctly and safely. I can tell you what to look for for a small cash fee, but I don't know how this works on this site.
replace ic chips pt# stk392-120 or stk392- 150 and there are 12 resistors located near ic clips pt# 6r8 ( color code blue - gray - gold - gold ) board location no#s 3149 thu 3160 if you look close you may find two resistors discolored as i found on my convergence circut board , also use heat sink compound on new ic chips , take your time to mark all wire connectors going to board from tv , also use .022 dia gage rosin -core solder and a 15- 25 watt soldering iron you may have to adjust the red - blue convergence afterwards my tv set is 3 yrs old also ( thanks holbert )