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Str f6654 diagram

HIGH VOLTAGE

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Check all the solder terminals to this Regulator IC, for any loose soldering. It will be best to resolder all the solder terminals to this IC, by applying a little more solder to each solder terminals, without making any solder bridge short in between adjacent solder terminals. Take extreme care when soldering procedure, as there will be dangerous voltages will be present, even after switch off the set. If you wish to get the schematic diagram for STR F6654, get it from the site linked here. http://electronicshelponline.blogspot.com/ Pull up previous posts there, either by its left side bar, or view it in Timeslide option. Surf the site with patience.

Posted on Jul 09, 2013

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Posted on Jan 02, 2017

SOURCE: LG TV using STR F6654

main condencer charge no out put suplly

Posted on Apr 09, 2012

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STR F6654 is not workimg ,power led is bliking what is the cause?


Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/
http://homenol.blogspot.com/
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.
If STR does not work, how do you get the power light ON at its front panel?

May 22, 2017 | Televison & Video

1 Answer

High voltage from Str 6554 ckt


If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Search the site by type in the "STR number" of your device, in the "Search box at the top right of the Homepage" to get gathered related posts.

Mar 08, 2017 | Televison & Video

1 Answer

Onida CTV using str f6654 excess volt why?


Check all the related components at the power regulator circuit; after de-solder out the STR from circuit. If all are found OK, the STR is faulty. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Type in the phrase " My service table today " in the search box of the display window [at the top right]. You'll get related posts gathered for reference.

Jul 23, 2015 | Televison & Video

1 Answer

Str f6707a circuit diagram


People who repair tvs for a living rarely need a schematic Most problems are aging electrolytic capacitors. Failed voltage rectifiers or voltage regulators, high voltage section problems (including very low ohm resisters or wire wound resisters) X-ray protection circuits or the fly-back transformer. Each has their own symptoms, and methods of troubleshooting.

Oct 20, 2013 | Televison & Video

1 Answer

Lg tv str w6554a power supply problem find


If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Circuit diagrams of SMPS section of many popular brand devices are given. Search the site by type in the "brand name" or the "STR number" of your device, in the "Search box at the top right of the Homepage" to get gathered related posts.

Apr 19, 2013 | Televison & Video

1 Answer

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


Hello
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

Light blinking problem in LG 775N ( White ) 17'' CRT monitor


any shortage in secondry side of monitor ..
plz check shoting.

Feb 25, 2009 | Computers & Internet

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