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

Ғылым және технология

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: 74

  • @winlose3073
    @winlose30733 ай бұрын

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

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    it is my pleasure

  • @nadembourkaib4185
    @nadembourkaib41853 ай бұрын

    حفظك الله من كل شر ورزقك من الطيبات.

  • @belalsmart7138
    @belalsmart713822 күн бұрын

    Excellent work , ❤

  • @muhammadishtiaq24
    @muhammadishtiaq242 ай бұрын

    Excellent thanks for sharing

  • @pbelectronic9287
    @pbelectronic92873 ай бұрын

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

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    I will try my best

  • @mtrltoolman
    @mtrltoolman3 ай бұрын

    جزاك الله خير يا بشمهندس ❤

  • @kaizen1071
    @kaizen10713 ай бұрын

    Yaşasın Haseeb elektronik. Sevgi ve selamlar efendim.👍

  • @German_byte
    @German_byte3 ай бұрын

    Sir, you are our hero!

  • @palwindersandhu2031
    @palwindersandhu20313 ай бұрын

    Thanks very much sir for sharing....

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    Most welcome

  • @saarike
    @saarike3 ай бұрын

    Simply great!!! Thank you

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    You are welcome!

  • @susantaatha6468
    @susantaatha64683 ай бұрын

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

  • @hichamtassi1753
    @hichamtassi17533 ай бұрын

    Salam Aleikum, very nice video !

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    Wa Alaikum Salaam Dear brother

  • @skecmrepairandcars2590
    @skecmrepairandcars25903 ай бұрын

    Mashaallah sir nice explanation

  • @pu8reLib
    @pu8reLib3 ай бұрын

    Another fantastic repair, above the excellent 👍 M.A

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    Many thanks!

  • @TheIronHeadRat
    @TheIronHeadRat3 ай бұрын

    Thanks for sharing 👍

  • @snhongo1
    @snhongo12 ай бұрын

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

  • @HaseebElectronics

    @HaseebElectronics

    2 ай бұрын

    So nice of you

  • @gauripartapshanker9197
    @gauripartapshanker91973 ай бұрын

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

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    best regards

  • @Solder_it
    @Solder_it3 ай бұрын

    Very good thank you ❤

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    You're welcome 😊

  • @Edmorbus
    @Edmorbus3 ай бұрын

    Thanks for sharing

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    It is my pleasure

  • @RaPiyadasa-ge5ff
    @RaPiyadasa-ge5ff3 ай бұрын

    Very well

  • @franciscomaciel4963
    @franciscomaciel49633 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?

  • @osamakosara
    @osamakosara3 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

  • @orlandoponce9200
    @orlandoponce92003 ай бұрын

    Good

  • @nayanjagirdar8408
    @nayanjagirdar84083 ай бұрын

    Nice sir 👌👍

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    Thanks and welcome

  • @masoudjafarzadeh
    @masoudjafarzadeh3 ай бұрын

    🙏🏻👍🏻

  • @victimovtalent6036
    @victimovtalent60363 ай бұрын

    wa'alaikum salam warohmatullaahi wabarokatuh😌

  • @Daniel-cj5rj
    @Daniel-cj5rj3 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

    @HaseebElectronics

    3 ай бұрын

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

  • @scroopynooperz9051
    @scroopynooperz90513 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.

  • @tvbox8478
    @tvbox84783 ай бұрын

    👍

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    best regards

  • @igorhernandez5065
    @igorhernandez5065Ай бұрын

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

  • @restingroysurong805
    @restingroysurong8053 ай бұрын

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

  • @bineshchauhan8713
    @bineshchauhan87133 ай бұрын

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

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

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

  • @bineshchauhan8713

    @bineshchauhan8713

    3 ай бұрын

    @@HaseebElectronics thanks sir

  • @AwaisEngineer
    @AwaisEngineer3 ай бұрын

    Nice video 😅❤❤❤❤❤❤😅😅😅😅😅❤❤❤❤ great

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    Many many thanks

  • @vivekmahadadalkar3875
    @vivekmahadadalkar38753 ай бұрын

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

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

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

  • @a1x1.r
    @a1x1.r2 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

  • @piyushkumar-iy4vd
    @piyushkumar-iy4vd3 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.

  • @warunakumara7671
    @warunakumara76713 ай бұрын

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

  • @HaseebElectronics

    @HaseebElectronics

    3 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

    @warunakumara7671

    3 ай бұрын

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

  • @omiza3416
    @omiza34162 ай бұрын

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

  • @user-ys3dc5lo6x
    @user-ys3dc5lo6x3 ай бұрын

    Can you make a video on dual output powersupply

  • @souhailhajri
    @souhailhajriАй 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.

  • @user-hz3bn6zw3u
    @user-hz3bn6zw3u3 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

  • @maissathiaw963
    @maissathiaw9633 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

  • @piyushkumar-iy4vd
    @piyushkumar-iy4vd3 ай бұрын

    Can i replace its 13007 transistor with 13009

  • @hkadsaf9790
    @hkadsaf979011 күн бұрын

    alikom al Salam

  • @stanleyjang4015
    @stanleyjang40153 ай бұрын

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

  • @MarshaJ8800TU

    @MarshaJ8800TU

    3 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

    @pu8reLib

    3 ай бұрын

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

  • @pradyumnaguria8138
    @pradyumnaguria81383 ай бұрын

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

  • @pradyumnaguria8138

    @pradyumnaguria8138

    3 ай бұрын

    I shall get your advise to repair led tv.

  • @arpitupadhyay5423
    @arpitupadhyay54233 ай бұрын

    Apne isme kya change Kiya hai

  • @HaseebElectronics

    @HaseebElectronics

    3 ай бұрын

    2sc1815 transistor - 2 1N4752 zener diode - 2

  • @arpitupadhyay5423

    @arpitupadhyay5423

    3 ай бұрын

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

  • @chandugameing3995
    @chandugameing39953 ай бұрын

    Sir apne reply nhi Diya

  • @Radek__
    @Radek__3 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.

  • @jcsudeshchannel8224
    @jcsudeshchannel82243 ай бұрын

    Good

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