{1060} only 7 Volt Output instead of 12 volt, Low Output voltage

Рет қаралды 12,363

Күн бұрын

in this video number {1060} only 7 Volt Output instead of 12 volt, Low Output voltage. 12 Volt SMPS providing only 7 Volt Output, Low Output. i demonstrated how to repair DDC S-120-12 12 volt 10 ampere power supply. i shared step by step troubleshooting smps switch mode power supply having low output voltage than the rated output volatge. it is KA7500B based power supply. 12 Volt SMPS Power Supply Has Only 7 Volt Output. how to repair TL494 / KA7500 based half bridge 12 volt 20 ampere smps rafeed model S-120-12, it was providing low output voltage than the rated 12 volt, and there was no control by voltage adjustment potentiometer. i found 2x 2SC1815 transistors and 2x 1N4752 zener diodes, i replaced the smps controller ic with new one and the power supply started functioning normally
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#howtorepair #smps #lowoutputvolatge
00:00 12 volt smps power supply is providing low output voltage
00:32 how to repair smps step by step
00:55 smps is providing hum sound

Пікірлер: 77

@winlose3073 5 ай бұрын

Thank you Mr. Haseeb always for your instructive and informative videos!

@HaseebElectronics 5 ай бұрын

it is my pleasure

@kaizen1071 5 ай бұрын

Yaşasın Haseeb elektronik. Sevgi ve selamlar efendim.👍

@pbelectronic9287 5 ай бұрын

Be continue SIR by giving this type of power supply related video.

@HaseebElectronics 5 ай бұрын

I will try my best

@nadembourkaib4185 5 ай бұрын

حفظك الله من كل شر ورزقك من الطيبات.

@German_byte 5 ай бұрын

Sir, you are our hero!

@saarike 5 ай бұрын

Simply great!!! Thank you

@HaseebElectronics 5 ай бұрын

You are welcome!

@mtrltoolman 5 ай бұрын

جزاك الله خير يا بشمهندس ❤

@pu8reLib 5 ай бұрын

Another fantastic repair, above the excellent 👍 M.A

@HaseebElectronics 5 ай бұрын

Many thanks!

@TheIronHeadRat 5 ай бұрын

Thanks for sharing 👍

@snhongo1 4 ай бұрын

I really enjoy watching these videos, thank very much Sir.....🙏

@HaseebElectronics 4 ай бұрын

So nice of you

@belalsmart7138 2 ай бұрын

Excellent work , ❤

@gauripartapshanker9197 5 ай бұрын

Informative vedeo. Thank you so much. God bless you.

@HaseebElectronics 5 ай бұрын

best regards

@muhammadishtiaq24 4 ай бұрын

Excellent thanks for sharing

@skecmrepairandcars2590 5 ай бұрын

Mashaallah sir nice explanation

@palwindersandhu2031 5 ай бұрын

Thanks very much sir for sharing....

@HaseebElectronics 5 ай бұрын

Most welcome

@Solder_it 5 ай бұрын

Very good thank you ❤

@HaseebElectronics 5 ай бұрын

You're welcome 😊

@susantaatha6468 5 ай бұрын

Excellent . Please sir explain how to working IGBT gate registance calculate. And capacitor charging and discharging time calculation. Thank you sir.

@hichamtassi1753 5 ай бұрын

Salam Aleikum, very nice video !

@HaseebElectronics 5 ай бұрын

Wa Alaikum Salaam Dear brother

@Edmorbus 5 ай бұрын

Thanks for sharing

@HaseebElectronics 5 ай бұрын

It is my pleasure

@restingroysurong805 5 ай бұрын

Sir I want to know how to test a transformer. Because you said high frequency don't try. Please sir help me

@RaPiyadasa-ge5ff 5 ай бұрын

Very well

@muhammadakhtarbodla1332 3 күн бұрын

ماشاء اللہ

@jcsudeshchannel8224 5 ай бұрын

Good

@nayanjagirdar8408 5 ай бұрын

Nice sir 👌👍

@HaseebElectronics 5 ай бұрын

Thanks and welcome

@osamakosara 5 ай бұрын

Thank you sir. I have one question where is the optocoupler in this power supply ( or in another way , how they isolated the secondary portion fro the primary portion). again thanks a lot sir for all your help

@masoudjafarzadeh 5 ай бұрын

🙏🏻👍🏻

@franciscomaciel4963 5 ай бұрын

Fitst thank you for sharing your knowledge. I really appreciate it 🙏🏼 Question: I live in Mexico (127VAC) and SMPS was switched to 220V (insted of 110V) so it get damaged during working for some time. Now is making a buzzing sound and switching on and off. Is this a similar damage?

@victimovtalent6036 5 ай бұрын

wa'alaikum salam warohmatullaahi wabarokatuh😌

@Daniel-cj5rj 5 ай бұрын

Great video as usual many thanks. You use parts from scrap power supplies. At which point do you decide a supply is scrap? I ask as you seem to fix most things.

@HaseebElectronics 5 ай бұрын

when the repair cost exeeds than the 65% of the actual cost. then i recommend to not to repair

@tvbox8478 5 ай бұрын

👍

@HaseebElectronics 5 ай бұрын

best regards

@AwaisEngineer 5 ай бұрын

Nice video 😅❤❤❤❤❤❤😅😅😅😅😅❤❤❤❤ great

@HaseebElectronics 5 ай бұрын

Many many thanks

@scroopynooperz9051 5 ай бұрын

Yo my main man Has! Has tell me, have you ever tinkered in upgrading 110v powertool chargers to 220v? I'm getting so tired of carrying around extra step down transformers because the cordless drills (for some weird reason) are always way cheaper in 110v! I have saved up for some Makita and Metabo HPT tools for jobsite BUT carrying around extra transformers is always a pain.

@igorhernandez5065 3 ай бұрын

Hi Sir. For a chance will you have available the schematics for the same exact board you are working on here?

@bineshchauhan8713 5 ай бұрын

Thanks sir Which reason it burned please And when will you continue the video series of incomplete drive series

@HaseebElectronics 5 ай бұрын

it gets damaged due to any high spike switching puse in startup circuit, that is from high power mosfets

@bineshchauhan8713 5 ай бұрын

@@HaseebElectronics thanks sir

@vivekmahadadalkar3875 5 ай бұрын

Sir please guide me equivalent to 2p4m scr i am your subscriber from india

@HaseebElectronics 5 ай бұрын

NT5457 NTE5458 2P6M T106M1 S4008FS21 C106M1G TS420-600T S4006LS2TP

@piyushkumar-iy4vd 4 ай бұрын

My exact same smps provide voltage 12v output when connected with series lamp...when connected directly to supply, input fuse gets blown immediately...input voltage selection switch us set at 220v.

@kashi658 Ай бұрын

W slam

@souhailhajri 3 ай бұрын

Hello, Can you explain please why an smps that uses ml4800 IC, the vcc and reference voltages are low, instead of 13V on vcc it is 7v. The reference voltage also low instead of 5v.

@a1x1.r 4 ай бұрын

السلام عليكم ورحمة الله وبركاته، كيف حالك أخي لدي سؤال لدي جهاز يصدر طنين حتى بعد ما غيرت له القطع اللتي انتي غيرتها. أرجو الإفادة

@omiza3416 4 ай бұрын

Hello Sir i have a question, how this power supply output is 7v if both transistors are damaged?

@warunakumara7671 4 ай бұрын

SIR WHATS THE PORTABLE MULTIMETER BRAND U USE FOR TESTING , WARUNA FROM SRILANKA , THANK U FOR THE VIDEO

@HaseebElectronics 4 ай бұрын

i have in this video KAIWEETS KM6 and i also have following FLUKE 15 FLUKE 77 FLUKE 179 Uni-T 202A+ clamp meter

@warunakumara7671 4 ай бұрын

thank u sir , we srilankans always watch ur videos , thank u sir @@HaseebElectronics

@user-ys3dc5lo6x 5 ай бұрын

Can you make a video on dual output powersupply

@user-hz3bn6zw3u 5 ай бұрын

Aoa sir mere pass 24 v powersupply hai karab hu gaye thi mainey repair kia toh usmain musla araha hai k jaise transistor aur output diode lagao waise he transistor aur output diode short hu kar karab hu jaian hai toh sir yeh kia issue hai aur kahan se hai plz guide me ThQ Jazzak Allah

@piyushkumar-iy4vd 4 ай бұрын

Can i replace its 13007 transistor with 13009

@maissathiaw963 5 ай бұрын

sir haseeb how are you i have power supply smps of satttelite receiver have 5 volt output without insering the cable in the motherboard port .Now when i connect the cable conductor in the same motherboard port power on the 5 volts is going to up down 4 volt 3.2 volt 2.58 volt etc please can you help to troubleshoot thanks

@vinumon6879 Ай бұрын

My 12v smps no out put on secondary then I change ic 494 after the voltage is very hight 19v I can't regulate voltage

@hkadsaf9790 Ай бұрын

alikom al Salam

@pradyumnaguria8138 5 ай бұрын

Dear sir, now I feel no deep thinking to repair p.s.u. If I join your channel ,

@pradyumnaguria8138 5 ай бұрын

I shall get your advise to repair led tv.

@stanleyjang4015 5 ай бұрын

Isn't it dangerous not to discharge the condenser, sir?

@MarshaJ8800TU 5 ай бұрын

Many power supplies have in circuit discharge resistors; but just in case, he always checks the voltage anyway... at 2:30 in the video.

@pu8reLib 5 ай бұрын

May be u don't know, Haseeb is a master, n big Engineer

@arpitupadhyay5423 5 ай бұрын

Apne isme kya change Kiya hai

@HaseebElectronics 5 ай бұрын

2sc1815 transistor - 2 1N4752 zener diode - 2

@arpitupadhyay5423 5 ай бұрын

@@HaseebElectronics Sir mere pass ek pcb hai usme 6-7v aarahe hai kya problem ho sakti hai

@chandugameing3995 5 ай бұрын

Sir apne reply nhi Diya

@Radek__ 5 ай бұрын

10:55 Sir, please don't teach us to regulate the output voltage WITHOUT any load. As you know, a lot of power supplies output higher voltage on idle, and then it drops to correct value when you apply the load.