Question about Philips 55PP9352 55" Projection Television
Red power light on no picture,no sound just a chirping sound
That problem indicates that the Horizontal Output Transistor (HOT)is beginning to malfunction. I would suggest that if you have a background in electronics that you do the following:
1) unplug and open the back of the set
2) look for the HOT and locate the Collector, Base and Emitter of the transistor and using your multimeter set to read resistance measure from the collector to the ground, it should read high almost infinite, red from base to ground it should read low and from emitter to ground it should read low.
3) if the HOT when read from the collector to ground reads low then you can bet that the HOT has a short circuit from collector to ground, and will have to be replaced.
4) In addition I would also perform a ring test on the Integrated High Voltage Transformer (IHVT).
This will tell you if the IHVT has suffered any damage from the HOT malfunctioning. You may end up having to replace both of the components.
If you do not have a background in electronics I would suggest that you take the TV to your local TV repair facility.
Posted on Feb 20, 2009
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Posted on Jan 02, 2017
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