Question about Panasonic PT-65WX51 65" Rear Projection Television
I have just had the 2 ics changed for a convergence prob stk392 -040 but i noticed on the old ics they both stated on them stk392-040 but had diff model numbers on them are there 2 or 3 ics to be changed as you have blue red and green it was only the red that was a pain but changed both use heatsink paste soldered perfectly but now when i turn tv on the standy clicks and makes a little squel noise then goes to click again like in a loop where did i go wrong i put all the wires back exactly as i disconnected them please help any ideas
From the symptoms you describe, it seems the
high voltage flyback autotransformer has failed along with the horizontal
amplifier (they are slaved to each other). The sound comes from the flyback unit. I guess it must be a
high pitched squeal, and click noises.
Also check for cold solders. You can inspect the PCB's for fractures, and then repair them. It may also be poor soldering that has failed. I would be checking for these things first.
If is better to change all the CRT's at the same time if one is replaced. Same with the IC's. Look for bad resistors, or bust capacitors, especially around the heat sinks. Once again, if you are changing one, might as well change all 4 (I think its 4-6) resistors. It will serve you well in the long run.
Hope that helps!
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Posted on May 04, 2008
First check for solder bridges on your work even the best solderers can bridge solder (even myself). if this is a seperate board. then unplug the power lead to the convergance board. if it is not a seperate board and is part of the main board then unplug just the convergance yolks turn the set on and set the convegance back to factory reset in the menu. unplug the set and return the wires back. then turn on the set you should be able to do a flash focus to return the convergance. if the set doesn't turn on after retuning the wires then check for open pico fuses or bad resistors in the convergance circuit.
Posted on May 04, 2008
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