Question about Sony KV-27S22 27" TV

1 Answer

Tv repairing when i plugged it, it blew. i replaced the 102, 1kv ceramic capacitor and the 2.7 ohm fusable resistor ans also the str. but it still doesn't start to turn on. the power led doesn't light. what do i need to do?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,153 Answers
Re: tv repairing

You still have something open in power supply. Look for a fuse resistor or bad relay.

Posted on Sep 23, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Sony TV has a power supply problem both ics irf1b7n50a in the power supply section are all shorting which number could I use as an equivalent. is there a way I could use a power modular with two power id's

Hi Saidi
Have you checked all the other components used in the main power supply regulator section circuit, before replacing a new STR? You should do it. There should be a reason for the failure to STR. You should find it, and rectify it, before replacing an other STR. Check all the small components, resistors, zener diodes, small value ceramic capacitors etc: Make sure all of it are OK. Especially give a keen attention to zener diodes used; if any. It will be best to replace these diodes, even if you do not find any fault with it with multimeter test.For more information go to
Power supply schematics to some popular brand TVs are given. Pull up older posts. Good Luck.

Nov 26, 2013 | Standard (CRT) Televisions

1 Answer

Enter main220v str6707 shart

when u replace the str 6107 along Whit it ,replaced the opto-coupler, the polistor , ceramic capacitors in the str side. mainly that one connected to is pin 3.
on the out put side replace the SE1XX voltage controller also.

Dec 22, 2010 | Sony FD Trinitron WEGA KV-36FS120 36" TV

1 Answer

Dear Sir, I'm Bangladeshi Tv Techanician, Sony tv


Before replacing the STR, have you checked all the components related to it? When STR burns out some of the nearby components, such as zener diodes and other resistors will also get damaged. You just replace the components, especially, zener diodes, in case it does not show any fault, replace it. Connect a 100W filament type bulb in seris with the power supply, and switch on the set. This will reduce the power concumton at the begining, and we can check its heat effect also, after all are ok we can connect directly. Check the smoothing capacitor at the secondary 130VDC. Replace it also. If you need furthermore assistance, feel free to contact me through Fixya. I'm an Indian, residing at Trivandrum, the capital city of Kerala State.

Dec 11, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

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

2 Answers

The power went out while watching my Sony TV KV-32V16. I tried to turn it back on with no success. When I push the power button I hear a click, but the TV does not come on. How do I repair.


The problem is from the power panel of the television. It got burnt due to the voltage that hit the panel.

Mostly, it's a capacitor that gets burnt on the panel, so what you have to do is, open up the television with the appropriate screwdrivers and locate the power panel, it is attached to the main cord that is connected to the power supply.

Assess the panel, and check for the burnt capacitor that is on the panel, or you can as well replace them power panel.

After doing this, your television will be in good condition once again.

Take care and good luck

Oct 08, 2010 | Sony KV-32V16 TV

1 Answer

Trinitron tv don't turn on

check power supply and H.O.T
also 0.01 ceramic fusabl resistor.

Jan 08, 2009 | Sony KV-20S42 TV

1 Answer

I have a resistor problem in sanyo ST-21G1

it's very difficult to give the exact value of that resistor.,but i can give some tips to find the value of the said resistor .( find how the resistor works, it is a dropping or fusable? if fusable used .47 or 1 ohm resistor if it is a dropping resistor you should make a trial and error .from 100k,10k or 1k.

Oct 29, 2008 | Standard (CRT) Televisions

2 Answers

Sony kv xj29m50 no picture.

If I understand you correctly:
The horizontal output transistor in your TV blew.

You replaced it with a BU2520DF.

I'm not sure what you mean by "change to dynamic mode".

Dynamic what?

Usually, horizontal problems in TVs are caused by bad capacitors in either the sync circuit, the driver circuit, the geometry circuit or the output circuit.

When I repsir problems like this I use an oscilliscope to find which stage is not working properly, then start substituting the capacitors in that stage until the problem is solved.

Look for large orange or blue ceramic or polyprop capacitors with bulges or cracks in them.

Look for electrolytic capacitors with bulging tops or shrunk cases.

Check and make sure no resistors are brown, they may be blown.

Use an ohm meter to test low value resistors in circuit.

If you don't have an oscilliscopw, that's about all you can do.

Jan 31, 2008 | Sony KV-XJ29M50 29" TV

4 Answers

Tv trouble shooting

whenever any fusible resistance fails means there is a short ckt in tv. failure is mainly due to main filter cap or rectifire diode os switching ckt failure(here as you cleared str.) remember while servicing power supply isolate hor. section for safety purpose.& connect it only after power supply output is ok &after checking parts in hor. ouyput section. if this seems to be ok then go for hor.output ckt failure like hor output,flyback transformer & cap& diodes connected with it.

Oct 02, 2007 | Standard (CRT) Televisions

Not finding what you are looking for?
Standard (CRT) Televisions Logo

Related Topics:

92 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Standard (CRT) Televisions Experts

The Knight
The Knight

Level 3 Expert

66413 Answers

Jaime Hernandez

Level 3 Expert

2267 Answers

matt martin
matt martin

Level 3 Expert

1187 Answers

Are you a Sony Standard (CRT) Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides