Question about Philips 27PT6441 27" TV

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Power supply problem on chassis EM2E

No turn on at swith on. I would need a diagram of PS, because of its peculiarities..
Thanks in advance

Francisco from Spain

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After turning on, my tv (21 inch CRT) produces peculiar rattling noise like high voltage sparking. The screen remains blank and there is no audio.


particularly that is a sign of leaking of high voltage in the secondary power supply or flyback transformer and should be corrected right away..check for emission of odor smell of ozone which is coming from high voltage leaks to make sure that it is definitely a high voltage leak...

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JVC AV-36D502: Input #3 doesn't work


Good day sir, its a different issue, about the capacitor, for as long as your replacement part is correct, it will work, now, there are several things you should check, the I/O device that controls the inputs of the TV, usually an IC, check your schematic diagram to trace the fault. check also the line from the input 3 to the controller IC on your diagram. Measure the voltage across the IC Vcc to ground if the IC is getting the right power, Low voltage can be cause by faulty capacitors, on the power supply line, or the IC itself is faulty, Circuit analysis and voltage measurements are needed to trace the faulty part. hope this helps thanks.

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Diagram of SANSUI LCT37SD.
Power supply default.

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1 Answer

Tv wont turn on -- stand by light just keeps blinking


This is very common problem for sony. Blinking light is power supply problem need to replace two voltage reulators in supply and caps and sometime horz output.


Sometimes if you adjust screen voltage adustment on flyback just slightly it will fix it.

cost if ps is 225.00
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Thanks doctor video

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1 Answer

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Your set isthe LN-1 chassis that problem is definately in the deflection / high voltage circuitry most likely the flyback itself. however this chassis has a history of bad solder cracks around the flyback and horizontal transformer mounting locations. I would check the solder before replacing the flyback. Also notethat if this condition has been ongoing without putting the set into protective shutdown you will also be looking at possibly having some weak regulator transistors and leaky diodes on the power supply module. Let me know if you need further info or a service manual for this set.

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Hello bashlort, The increase in voltage may be to some circuit loading being removed this is a sign that something may have increased in resistance or something may have opened in the attached circuit. Have you taken any voltage measurements in the video section of the set, if not check the voltages on the pins of the video processor IC and follow the connections up to the CRT socket, be sure to pay special attention to the focus and screen grid voltages. If those are ok check the voltages in the horizontal section including oscilloscope measurements for drive signals. Please inform me of your findings. Thank you, Shuttle83

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2 Answers

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Your TV swithes itself off, probably to standby to protect from doing further damage. If you, or an experienced friend have any idea of the power supply voltages in the set, then get him to monitor each voltage when you switch on. Bear in mind the chassis metal may be live at 120 to 300 volts, and keep clear of the line output transformer. You may have to use the old type analogue volt meter with a pointer and scale, as the reading may only be there for a second or so. Remove any dust so that you are sure to see where to connect probes. There is usually an electrolytic capacitor for each voltage to connect the probes to. If the negative side is at chassis potential, then clip the negative probe to this. If no reading is measured across one of the electrolytic capacitors, then this, or another component, may be short circuit. The rectifier diode or a fuse will have blown, or be overloaded. The fault is detected by protection circuits, which cause shutdown to standby. If you can locate the protection circuit, its input data (voltages) may give you a clue where to look.

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1 Answer

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You will have to order this through an authoized RCA dealer Its not old enough yet for general publications from RCA If you call Sherl at TEEVEE Supply at 1-866-207-9824 or sales@teeveesupply.com give them the CHASSIS number NOT the model and they will order you one. You should know my freind when dealing with RCA alsway go by a chassis number! Good Luck

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