Question about Panasonic CT-27G14 27" TV

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Tv my tv blows the fuse every time i switch it on ive changed twice still the same thing it all started when there was low power in my area and as soon as i nlight the heater the tv went dead coz even my amplifier could not switch on properly due to the power being low voltage

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Re: tv

Check the transistors around the power supply, most likely there is one that is that is shoted out.

Posted on Sep 10, 2007

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19 in lcd sharp keeps blowing fuse

check the primary section of the powersupply mostly diodes and transistors inside and alo there filters.

Feb 06, 2013 | Sharp 32R-S50 32" TV

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In my tv fuse is blowing off immediately

If fuse blows off immediately, i means that there is a short circuit occured in your telivision. This can mainly due to some diodes or regulators inside your tv. An overvoltage, spikes, ie [sudden high rise and go low], in the supply votage in your home, could damage power supply regulator components inside your tv.
All Sony Tvs has high accuracy power regulating systems inside. It is an onboard assembly, usually take 1/4th of the area of the TV. In older Sony TVs, this section was built in with use of transistors of different types. But your tv is not so old, so its power supply system is built with an STR, an Ic meant only for power regulations. Normally it willb numbered STR S6707, STR S6703 etc; according th the working voltage of the main board, and screen size of the TV.
This STR may get shorted due to power fluctuations, or any other reasons. A I mentioned above this is an Ic look like small squuare biscut of about an inch in square, and will be black in colour.
The rectified main power supply is given to it via an SMPS transformer [Swiched Mode Transformer], and the Ic will swictch it on and off at the rate of sbout 25KHz or more, and this transformeres secondary voltage is used to power up the other part of the ciiruit board.
If the fuse is blowing as soon as the set is switched on, this Ic will be faulty [Shorted inside]. If you put an another fuse, it also will blow up due to short. It is not good to play with power supply system by doing this as it may harm to other components also.
You have done it I thinks. Here in India, we gets 220VAC as home power supply. Sony TVs used here have a fuse rateing of 250V 3.5Amps. If your household supply system voltage is also this you must put only this rated fuse. If it is 110 or 120VAC, the fuse rating may differ; and will go upto 6 to7 Amps. More than this rated fuse should not be used.
You just do one thing. Just open the back cover of the TV, locate the power regulator section, and chech whether any main rectifier diodes for leak. There may four of them. In some sony Tvs, rectifier stalks are used. Check it for leak. If thery are all good, measure the resistance across the main filter capacitor with a multimeter set in Ohms range. If the STR said above is short, the meter will give full scale deflection. Unsoder the STR and pick it out after loosing its fixing screws to the heat sink. Again check the resistance accross the main filter capacitor. It must sho a low deflection or no deflection at all. Never replace the STR with a new one as there may be some other faulty components in that section. Usually when STR fails, there are some Zener diodes, Wire wound resistor etc will also gets shrted. If you replce the STR before checking them for fault, the STR you puts in will get shorted as you swich on the set. It will take just 1/100 part of a second.
So check all the components related with power regulator system, and then only repace the regulator. Caution: Keep chlidren away from you while you open the tv. Never touch any part of the circuit board while power supply is there. Plug out from the wall socket each time you touch the printed circuit board. As your Tv screen size is 32", an approximate of 25KVDC [15,000VDC], will be present at the first anode of the picture tube while it is working. It is too dagerous to contact.
If you haven't through knoledge, skill and patience, never try to repair it. If you knows to follow its schematic digram, buy one book and follow the circuit.
Keep an adult beside you as you try to repair your set, as a precaution.
If you have any doubt, report to Fixya, they will give me alert. Ok

Oct 20, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

On/off - fuse blows out

Use a higher amp fuse this should solve your problem if its not a electrical fault in the set.

Mar 09, 2009 | Sanyo DS31520 31" TV

1 Answer

My 36" Flat-screen CRT Philips TV turns itself off

I'm getting the exact same thing with a 26" model. First I found AV2 started carrying AV1's input so we put a switch in. Then it starts to shut off with the twice blinking light after viewing the scart input for a while. I'm currently trying feeding it scart set to composite rather than RGB to see if it'll stay on. One other thing - I just got a oneforall remote. I don't suppose you did - in case that is triggering something?

People are reporting a fault with the "painter" chip which is terminal usually. But that seems to manifest as the tv switching to scart input spontaneously. I haven't seen that.

Hope you get somewhere - I'll let you know if I find anything.

Feb 02, 2009 | Philips 34PW9817 34" TV

1 Answer

Sony 2167 No power on

I have not worked on your particular model. But, I have serviced many TV sets over the years. My answer will ge generic.

Check all the capacitors in the horizontal output stage and power supply areas for high ESR. All the caps that are out of spec must be changed.

The high voltage multiplier & flyback can also cause the fault you are having.

You have to consider that the DC voltages are not the only important spec that has to be met. There are also many power drive signals that work with reactive devices. If there is any defect in the critical areas there will be failures.

Jerry G.

Nov 26, 2008 | Sony FD Trinitron WEGA KV-21CL10 21" TV

1 Answer

Blows fuses repeatedly on IWT3206 model

when electrical storm was going on the t.v. was on ? if it is was then return electrical / heavy lightning it may burn the parts.shorting through your mains and anteena conections, please clarify

Jun 24, 2008 | Standard (CRT) Televisions

2 Answers

RCA XL100 Commercial Skip won't turn on

The power supply or one of the circuits that it is feeding has a short in it. It may be able to be serviced by someone who knows the product and is experienced at working on the model you have. There may be a question about parts availability for it.

You can call RCA to find out who the authorized service rep is for your area. This is something that most small TV service stores may not be able to repair.

Ask for an estimate before approving service. The repair for your unit may be expensive.

Jerry G.

Apr 16, 2008 | Standard (CRT) Televisions

1 Answer

Power disconnectd when i switch on my TV

maybe the power regulator is damage or there some zener diode change value

Mar 27, 2008 | Philips 20PT6441 20" TV

1 Answer

Its actually a 13GP244

you need to check the power supply area. usually when a fuse blows, that means the bridge rectifier is blown or the ic in the power supply area is blow too or both are blown.check there..good luck

Apr 04, 2007 | GE 13GP243 TV

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