Seemed to Fix Convergence problem; Now TV power doesnt work.
I only had a convergence problem , now I have more!.
I removed the Convergence PWB, and Replaced BOTH IC804 and IC805 with two STK392-150's.
Now, when I plugged the TV in, the
"power" button would go on "blue light" but, no picture, no sound.
The "blue" power button is not workable; the only way to turn the TV off is to unplug.
Thanks for the help.
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Re: Seemed to Fix Convergence problem; Now TV power...
You need to check first for solder splashes or bridges created when the new Ic's were installed,the next thing to check is a disconected conector or might not in place fully and then check for loose conections in the main board,all that movement might have loosen something more than before,check the horizontal driver transformer,the horizontal output transistor.Be careful
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You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.
Problem #2 CRT Fluid is Cloudy
Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos aroundimages.
Hello, I have the exact same issue with my R49W36, I replaced the convergence chips but there are also two 1 ohm resistors with the same color pattern as yours that are bad. I have looked all over and cannot find a 1 ohm resistor anywhere. Where did you find it?
chances are that IC804 has failed. You have two ICs that allow you to
converge the three colors. IC804 is used for Red Horizontal and
Vertical Convergence and also for Green Vertical Convergence. IC805 is
used for Blue Horizontal and Vertical Convergence and also for Green
Horizontal Convergence. These ICs run very hot and have a very high
failure rate which sometimes will cause damage to resistors in their
associated circuits. They are both STK-110 and it's best to replace
them both at the same time. It's also a good idea to upgrade them to
either STK-150 or STK-180. These will run a lot cooler than the
Before replacement do
inspect for any open or overheated resistors as I stated earlier. Being
you only have problems with Red Convergence the plus and minus power
supplies should be okay since they are common to both ICs.
www.tritronicsinc.com. They have the Hitachi CZ00433 (STK392-150) in
stock for $20.11 ($32.43 retail). These are Hitachi OEMs. I've had very
good results replacing STK392-110s with these chips. Do check for open
or overheated resistors before replacing these chips
It sounds to me also as though the convergence amps are out. That unit has two STK392-110 IC's which are multi-pin IC's and not something the ordinary laymen should consider replacing for several reasons - more on that thought later...
The convergence circuit for that system is in the 800 location numbers on the board. IC804 and IC805 are your amps. They're mounted to an aluminum heat sink via screws and are backed with heat sink compound for added heat dissipation. You would also need to check all the feed resistors to those IC's for change in value. I have RARELY changed out the convergence amps and not found at least one of the feed resistors had changed in value. In that unit they're 2.2 ohm 2 watt.
Another insider tech advisement is to replace the present amps with STK392-150's instead of the 110's for greater reliabilty. They do cost a bit more, but are well worth the investment.
Lastly, can you so this yourself... If you're the kind of guy that could remove your appendix yourself with simple phone instructions from a doctor this will be a breeze. If not, get a professional. Not only can you ruin the amps putting them, heat damage, line-up or simple static blow out - after the job you'll need to do a complete convergence and may need to touch-up the parameters in the service menu (not a customer menu). And it relies on hex-decimal input. In short, you would be a penny wise but a pound foolish to do this yourself.
1st guess is bad convergence ic-either IC804 or IC805. Both are part #STK392-110. May be bad connections in convergence circuit, or open resistor(s) As for too much green, not sure, shouldn't be because of convergenece circuit, possibly green CRT screen voltage needs adjustment.