Question about Philips 27PT5441 27" TV

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Blows Fuses Philips 27PT5441/37 Blows Fuses. Posts suggest some kind of "PTC" device. If this is the surge MOV protector it is not the cause of the problem in this case. Are there other known issues with this model that cause the blown fuse issue?

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  • jhair543 Feb 25, 2009

    The cause has been discovered to be a poorly designed Deguasing Circuit. The Positive Temperature Thermistor in this circuit had been employed as a dual 3 ohm thermister package running in a parallel configuration of its internal thermistor disks. Removing one of the thermistor disks inside that 3 legged device and connecting only one of them has solved the over current issue. The dequasing circuit still works sufficiently and the fuse no longer blows.

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Hi

They have so many reasons why blown fuses in TV... all you have to do is to check the shorted semiconductor like regulator and drivers..

Thanks!

Posted on Feb 25, 2009

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I have sony trinitron wega t.v and when i plug in to switch on.. Light does not come, no sound. Nothing. is it repairable.


hi,
yes , it is reparable. ur tvs smps power supply have some problem. check th fuse first. also check the over surge protector MOV is short or not. also check the STR power drive in the power supply. just relapse. below is the photo of MOV and STR. if u repalce the STR also try to replase the opto coupler also. added the photo of opto coupler.
ok

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I had a power outage a couple nights ago, which has caused my television to not turn on. It is a Toshiba model CZ27T31, which was off & plugged into a surge protector at the time the storm knocked the...


Please check if your surge protector is working properly now. There is possibility that the surge protector is blown off due to high voltage surge. Check if your surge protector has a reset switch which some of the surge protectors have. If the problem still persists then you have to call the technician to replace the safety fuse which is inside the TV. The cost will not be much. I will personally recommend that you change your TV as it has outlived its life being 10 yrs old.

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1 Answer

We had a near lightning strike and now my tv (sanyo model ht27744)doesn't want to come on.


Lightening may have caused a surge on your power lines to the house and to the outlet the TV was on.
Do other things work on that outlet? If not you tripped a power breaker.If they do work check this.
Unplug the TV for 2 min or more and plug back in.
Try bypassing your surge protector you had it plugged into. It could have died when the lightening struck.
(no surge protector?) Bet you'll buy one for your next TV.
Look for 3000 joules and up rating for a surge protector and insure it has protection for a cable/antenna input too.
If this doesn't work the TV may be fried or internal fuse blown.
Time to take it to a repair shop or depending on it's age (5 years+) it may be time to buy a new TV and surge protector.
Near Lightening strikes can effect appliances from several inputs that could be affected from outside like Power, Cable, Antennas, Phone Lines that come into your house.

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1 Answer

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Switch off the surge protector for 2-3 minutes then switch back on and TV should work.

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Not to different from arcade, If the fuse is blowing right away check the bridge rectifiers next for shorts and anything on the primary ac to dc side first, Caps,may have a surge suppressor on the ac side. If it was lightning sure you will find it in this area. Secondary supply shorts usualy do not blow fuses, Just cause the supply to shutdown.

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1 Answer

Fuses


Hi there!

Dead short in the power supply, possibly the rectifier or the PTC has failed. PTC located in the Primary supply at the point where the coil around the tube plugs into the Main board. Two terminals to be exact. Normally cream in colour if it is an original Philips PTC. If the rectifier is short you may expect to have more items blown. Good Luck, Regards, JUS004

Mar 22, 2008 | Philips 27PT5441 27" TV

1 Answer

Philips 27pt5441/37


Hi there!
Dead short either in the power supply or rectifier, or PTC faulty.
PTC is cream in colour close to the mains on/off switch. Regards, JUS004

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1 Answer

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Check this link: //http://www.fersay.com/view/catalogo/ls_catalogo.php?q=PTC+96012+&busquedaen=cod_etco&lang=es&busqueda=1

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If you register at thsi site which is free you can download the manual from there. Follow the link below:

http://tv.manualsonline.com/manuals/mfg/philips/philips_magnavox_mt1931b_mt1931b.html

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