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Ultra slim tv

Ultra silm tv is there in that fault is dc ok and str no x6757 ok ,horizontal output ok power supply voltage not getting

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Lg ultra slim TV supply STR 6554 ,110 volt drop in one second when we on the tv

Is the power source/transformer
output to spec
looks a bit past it in your photo

resistors drop ......capacitors increase

look for leaks or printed board burns42045576-892f-42e6-be9f-ea2f910b1692.jpg


Mar 30, 2017 | LG Televison & Video

1 Answer

Videcon slim tv No eht power supply ok

Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
Type in this key phrase " my service table today " in the search box at the top right of the display window of the home page, to get gathered some pages which has the details of practical experiences to the author of that site.

Jun 02, 2016 | Televison & Video

1 Answer

Tv lg ultra slim no display but sound ok why?

Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts.
Do a search by type in the brand name of your device at its search box.

Jul 16, 2014 | LG Televison & Video

1 Answer

No power supply regulating and str no x6757

The STR or voltage regulator is probably bad. If you are not familiar with soldering and using a multi meter for troubleshooting then I suggest buying another power supply they are not too expensive. Try e-bay. Good luck

Mar 23, 2014 | Computers & Internet

1 Answer

My tv is samsung 21A530 ultra slim the problem there are curve in all corncers and horizontal bar on the top and bottom

The problem of your television is the abnormal screen like the pincussion in booth side and bar at top and buttom.The cause of that is the abnormal supply voltage of the crt board.The power supply have low output voltage because deffective and leak parts like the regulator transistor or capacitor.If the power supply is low voltage it affects the apperance of the screen of the TV.So its better to replace the deffective parts of you television to came back the normal appearance of you TV.If you do not know how to repair and troubleshoot its better to called a repair technician.

Jul 11, 2011 | Televison & Video

1 Answer

Onida 21''ctv picture coming in stamp type {cutting from four sides}

Replace its Horizontal output Transistor. If the base-emitter junction has a leak inside it, this type of fault will occur. Before replacing it, check the main DC voltage to LOT [Line Output Transformer]. It should come around 102VDC. If there is not this much voltage, check the electrolytic filter capacitor connected across thie supply line to main negative for open or value developed. Replace the same is good. Till there is low voltage found, check the retifier diode that rectifies this 102 volt DC. If all the above are OK and still you get a stamp like raster, check the heat of the Horizontal Output Transistor described above. if it overheats, LOT is defective and should be replaced with same type and number. OK.

Jun 12, 2011 | JVC Televison & Video

1 Answer

I have a sony trinitron puchased 2001 after 911 standby light flashes constantly picture flashes off and on

Complete loss of horizontal oscillation and output is the trouble. To get it repaired you have to open your TV, Just look the horizontal driver transformer, a small transformer fitted on the main board very near to the line output transformer [LOT] for winding opened. If its primary winding gets opend, even though the horizontal oscillator section works, the pulses will not reach the horizontal output trnasistor, which drive the above said LOT, and the fault you describes will occur. Check the main secondary regulated supply voltage [140VDC] also. If this voltage is missing, check the reason and follo the supply rail print from the SMPS power supply reguator section.
Check the low voltage regulator IC, usually 7808 or 7812, which can be located on the main board, which supplies 8VDC or 12VDC to the ICs on the main board. Anyway, there is no horizontal output fuction in your tV. and try to find it. If you wants furthermore assistance, feel free to get me through Fixya. OK.

Jan 01, 2011 | Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer

My standby light comes on and blinks seven times repeatedly but no picture.

Seven blinks of standby light in Sony tv denotes that there is a high voltage problem. It is otherwise called as high voltage shutdown.
Normally 32" tvs has an anode voltage of 27,000Vdc approximately. If it rise beyond its limit, the microcontroler in your set will detect the high voltage, and will prevent it from working further, to protect you fro X-Ray emisson as well as to protect the TVs other components inside the ciircut board from further damages, and will inform you about this fault, by seven continous blinkings of standby light. Now you are seeing this.
The final anode voltage depends very much on the input DC voltage to LOT [Line Output Transformer]. Usually this supply rail will have a voltage level of 135 to 140VDC. If it rises above this level, extra high tension voltage generated by the above said LOT will also rise proportionaly to high, which will goes to the final anode of the picture tube. If this voltage goes very high, there is a chance to radiate X-Rays from the picture tube which will harm you. This high voltage protection also known as X-Ray protection.
The main reason for this fault is related to the regulated power supply section inside the circuit board of your tv. To repair this, you have to open the back cover of your TV. Take every precautions before doing anything to your TV as it is an electrical equipment, which generates high voltages inside it while it is working, and there are voltage points as high as 30KVDC [30,000VDC], wich is very dangerous.
Just open your tv, and locate the power supply section. It is very easy to locate, as the main supply wire goes into it. There will be a regulator Ic, normally Sony sets have STR numbered ICs are used in that section. This regulator will heat up to 75degreeC, and there is a chance to get loose the solderings on its leg points, as continous heating and cooling process. Just look for any loose solderings on the solder side of your TVs power supply section. In practice, I found this in too many Sony sets, during my 36 years in this service field. It is very difficult to detect the exact loose point, so I always do is, just resolder most of the suspected points on the pcb, by applying a little more solder, and will retify the problem. Moreover, just replace small electrolytic capacitors fitted on that board, because some of them may cause this voltage rise. The DC supply voltage rail, will be between 135VDC or so. Any fault in the components fitted around the above said STR will cause this problem. So check every components, and replace if needed. If this does not help replace the STR with same type and number.
Go further with confidence. You can and you will. Wish you sucess. Take care. OK.

Nov 18, 2010 | Sony FD Trinitron WEGA KV-32HS510 32" TV

1 Answer

TV red light blinks seven times. Is this a code for the problem?

Seven continous blinks of standby light in Sony TVs indiates that there is some problem in power regulator side or on horizontal output side. It is due to high voltage shutdown. When the [EHT] voltage ie Extra High Tension voltage given to the final anode of the picture tube exceeds 33KVDC [33,000VDC], this happens. The cause may be in the power regulation side in your TV. Normally Sony TVs are working at about 120 to 135VDC. If voltage at this DC rail exeeds, EHT said above will increase beyond its limit, and CPU Ic inside your TV will detect it and shuts the whole system down to prevent further damages to more components. This is happening in your TV now.
This process is called saftey shutdown.
To rectify this problem you have to open the TV. Proper care should be taken before opening it as you are going to work with an electrical equipment, which has very high voltage points are there inside. All precautions must be taken before opening the TV.
Normally this fault will be due to the poor regulation of the power supply section inside your TV, that causes a voltage higher than normal is comming into the main circuit from power supply. STR type regulatros are being used in Sony sets for this regulation purpose. You just locate the power regulation side, and check for any loose solderings to the legs of the STR regulator or its nearby components. You must have some concept of sodereing in this matter. Components fitted on the power supply section will heat up while TV works. Ater long use, the soldering at the legs of the heated components may get loose. We can't detect loose contact exactly where it is. So it is a good practice to resolder the sodering of suspected components, and we in practical servicing field also do this trick.
If it doesn't help, the STR fitted inside may faulty. Desolder it out from the board and go for a same type and number. Replacing it will solve the problem. Ok

Oct 29, 2010 | Sony FD Trinitron WEGA KV-34HS420 34" TV

2 Answers

HP D530 SFF desktop

it is depend up on the power supply connector and it will give the output according to the smps you can do one thing try with installing other fan and see is it in perfect rotation. bye

Oct 09, 2007 | HP Compaq Business d530 Ultra-Slim PC...

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