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No power suppely out to horizondal section ,but 330v store n capacitor{using STR F664 IN SMPS how to drive supply to h out

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Supply through sm transformer to diode, 100/160 v capacitor ,,,then fusible resistance to EHT pin of primer winding to bu transistor

Posted on May 01, 2015

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LG tv str w6754 glows and short. power supply is not working?


Replace that STR. Before replacing, check all the related component/s at the SMPS section [HOT] side. any one damaged component will make the replaced STR to fail. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
SMPS Circuit diagrams [STRW6754] of many popular brand TVs and other devices are given.
Search the site by type in the "BRAND NAME" or the STR number; of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

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Just take the hard drive out the caddy and use it in another caddy. It will be easier and cheaper than fixing the caddy.

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Power supply board not working, what section i have to cheke...?


Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

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Can i get onida CO21BLDU Schematic . no power suppely out to horizondal section ,but 330v store n capacitor{using STR F664 IN SMPS how to drive supply to h out


Supply through sm transformer to diode, 100/160 v capacitor ,,,then fusible resistance to EHT pin of primer winding to bu transistor,,,voltage dropage due to bu short circuit

May 01, 2015 | Televison & Video

2 Answers

Str x6750


Check all the other components, at related SMPS circuit, for any loose solder terminals. Check and replace damaged component/s at it main power regulator [SMPS] section circuit. Contact any service technician. 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.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis.

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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 http://electronicshelponline.blogspot.com/
Power supply schematics to some popular brand TVs are given. Pull up older posts. Good Luck.

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How to open atx power supply


Don't open it. Buy a new one if it's not working. If you touch the wrong thing in there you will die. I'm not kidding.

Jul 27, 2012 | HP ATX-300-12Z, ATX-300-12Z Rev. CDR, HP...

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Model Sony KV-G21q2S Problem-STR 6707 has been changed. After an hour the went down. The fuse and STR 6707 are working. But no picture no sound. When plug in it gives "boo" sound for few...


This is the SMPS Power suply drive and the IC fails ONLY if there is fault in the circuit. You need to check on the SMPS section
check this link below for tips:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Next you need to check if the LINE output transformer has failed. If so this will have a higher current drain and so switch off the SMPS unit. check for the EHT drivers, capacitors in the HT circuit.

Jun 25, 2011 | Sony FD Trinitron WEGA KV-20FS120 20" TV

1 Answer

Ive had this bluray player for 2 years and it was working fine, then one day i tried to turn it on and nothing happened. i checked if the fuse was blown but i appears to be fine. so there is no power...


hi,
there is possibility of two complaints.
1, The SMPS power supply fault
2. the mother board fault.
if the SMPS is faulty the you can rectify the problem. If it is with the mother board the you have to contact the manufacturer .
First of all you have to check the SMPS ( switch mode power supply). you have to check the voltages at it secondary stage. 5v, 12v, etc
switched-mode power supply (switching-mode power supply, SMPS, or simply switcher) is an electronic power supply that incorporates a switching regulator in order to be highly efficient in the conversion of electrical power. Like other types of power supplies, an SMPS transfers power from a source like the electrical power grid to a load (e.g., a personal computer) while converting voltage and current characteristics. An SMPS is usually employed to efficiently provide a regulated output voltage, typically at a level different from the input voltage
for checkin the SMPS voltaes you need a multimeter. And check the voltages at it secondary stage
Added the inside view of BD 1600
ajin_g_45.gif

if there is no outputs from the smps then you have to replace the SMPS drive STR ic near the big capacitor. Also ty to replace the OPTO coupler ic. y have to check the all resistors near the ic.

Remember one important thing that the capacitor can hold charge for some time even if you disconnect the power. so after removing the power. remove the SMPS very carefully. discharged the capacitor using a bulb.
i have also added a video for SMPS working for you reference will hep you for repairing your one

ok

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Power supply problem in matsui tvr180, in STR section, can u please suggest me the circuit diagram to rectify my problem


The power supply, from memory, uses an STR type power supply chip and is controlled by use of an opto coupler.
In my experience the opto couplers hardly ever give trouble, nor the STR's if caught in time.
Change the capacitors around that part of the board within the hatched area especially look out for 22 or 47uF 35 Volt start up capacitor.
Hope that helps but the models changed from week to week depending on which factory the ubits came from.

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