{683} How To Power Up A Circuit For Repair || Work Bench Safeties

[@t1d100]

Just sharing, here... In the USA, we have "Painter's Tape." It is similar to brown masking tape, but the adhesive leaves no residue, when the tape is removed. It is usually blue, in color. When I clean my bench top, I use this type of tape to pick up the tiniest bits of metal, that the brush misses. It is also useful for securing a PCB to the bench, when soldering. It has a thousand uses, on my bench, and I always keep it at hand. Again, in the USA, using a light bulb in series as a current limiter is called a "Dim Bulb Current Limiter." It is also (incorrectly) called a "Dim Bulb Tester." It requires a common incandescent, or halogen, bulb(s). LED bulbs will not work and will not protect you. You can mix and match different wattage bulbs, in parallel and series, to obtain the specific current that you desire to use. You mentioned that a resistor may be used to discharge a capacitor, but then you used your screwdriver to short the cap pins. With all due respect, this is a poor and dangerous method that can damage the cap. A "Capacitor Stinger" probe can be made from a high value resistor, having a sufficient wattage rating, a few bits of wire, heat shrink and chop sticks. Many DIY solutions may be found on Google. Constructing one might make a good, short, instructional video, for you. I hope these things help. I take no responsibility for what any individual makes from my suggestions. Each person is responsible for their own research, knowledge and safety.

[@HaseebElectronics]

first of all i am thankful for your comment it is really a valuable safety point. i will share it among all my viewers as well please accept my best regards and special thanks

[@ΠάριςΑζής]

@@HaseebElectronics In the light of all said above, a 100W incandescent lamp does not always offer the needed protection, simply because it needs relatively too much initial current in order to glow permanently (if something is still wrong after a repair, or even if it is used for a simple verification test that everything is O.K with the power supply under test). The best method is to use each time a bulb that has a power less than or equal to the power of the power supply under repair/test. As a practical example, using a 100W lamp in series to the input of a defective USB telephone charger under repair does not really make sense. In such cases I use a 3W night lamp, while in general repairs I prefer a 40W lamp. On the other hand, an inverter welding machine may need a 350 to 500w lamp for the same test...

[@HaseebElectronics]

perfect I normally use 60 watt 100 watt 200 watt 300 watt 500 watt halogen rod depending on the load size

[@dzabakwesi2213]

@@ΠάριςΑζής well explained

[@josedicesare2407]

Ho scoperto il tuo canale per sbaglio, devo dire che ,oltre a saper riparare le schede, sai perfettamente passo dopo passo a spiegare ogni singolo componente con le sue relative funzionalità, cosa che nessuno lo evidenzia, con il tuo canale sto imparando ogni singola riparazione con pazienza e tanta buona volontà. Un likes e iscrizione assicurato. Bravo e complimenti 👍👏👍

[@alexbinai2322]

Continue with similar testing practices, enjoying it very much

[@timmccabe9889]

Great video on troubleshooting steps and the safety aspect of working with power supplies. I have watch some of your videos and they have helped me repair items around the house.

[@HaseebElectronics]

best regards and special thanks for your valuable words to appreciate my efforts stay blessed

[@ChrisHalden007]

Wish I knew that before I blew off the last power supply I tried to repair 🤣 great video. Thanks

[@1beejay1]

Mr. Haseeb, Thanks again for another wonderful video. I really appreciate in your videos; how you always make safety first and tell us how to be safe! I always learn important concepts from your teaching.

[@HaseebElectronics]

best regards i am thankful for your valuable encouraging comment stay blessed

[@juancolon8816]

Thank Haseeb for teaching us.

[@JamalSixty]

Dear Mr:Haseeb I am Jamal from Sri Lanka and I always watch your videos and gained more knowledge out of it. Much appreciated if you could upload a tutorial about Power Bank circuit principles and Power Bank jump starters. Thanks in advance.

[@herielrizk]

This time with language subtitles, we really appreciate it..👍👍

[@HaseebElectronics]

it is my pleasure

[@ashoksafaya5397]

Why we use series lamp no one explained this way so far,thanks. The Soldering iron with your good self ,may be with auto desoldaring pump,seeing for the first time,thus satisfied with quality teaching.Thanks.

[@rmjnm]

Helpful tips for ones who spent time repairing these power supplies. Thanks a lot.

[@HaseebElectronics]

You are most welcome

[@gonzagaribotti9852]

good video as always...live is always connected to the lamp...in case i conected the other way is no effective the serie lamp circuit?

[@christophersmith-zn2kn]

Hi haseeb, as I am learning just wanted to know if I could use a led bulb or not.

[@HaseebElectronics]

best regards no we cannot use LED lamp, we need tungsten 60 watt or 100 watt lamp (which have resistive filament)

[@polskasopot]

Blessed be our Father in heaven for your wonderful work.

[@HaseebElectronics]

GOD's willing and GOD's blessings

[@sellathuri6420]

Mr. Hasseb, why need to remove the ground cable?. I used series lamp for ups repair, lamp light up and ups not turning on. After remove the lamp and power up ups, then it is able to power up. Kindly advise. Tq

[@osisegregory]

This is great technique sir! Wondering who came up with it.

[@chankokhoi4496]

Thank you very much Brother for your way to show how to you how to use the lamp Brother

[@aliyuibrahimadamu5106]

I really like your videos. I downloaded as many as possible. Please what advice can you give me on how to be very familiar with circuits. I'm Biomedical and Mechanical Engr. I want to upgrade my electronics knowledge to handle medical equipment, most especially the electronic aspects. Thanks

[@clems6989]

Watching this channel (and others) is a great place to start...

[@alexwayo6983]

thanks so so Mr. i finally got it. god bless U in whatever u do...............................👌👌👌👌👌

[@jaymopromotions3958]

This was the simpliest you have taught me..asalam aleikh..teacher of greater nations

[@HaseebElectronics]

best regards and special thanks

[@ElectronicUrdu]

Nice video sir

[@HaseebElectronics]

thanks a lot bhai

[@nafez3945]

Thank you It’s very important to know befor any repair

[@HaseebElectronics]

You are welcome

[@kamranjavaid]

Use of this series lamp will also do shock prevention by reducing the current flow?

[@HaseebElectronics]

no. if we will not take care for earthing. this series lamp is also dangerous because some milliamperes can damage human body

[@rahmatullahpopal9347]

Assalmualikum thanks for good videos can we use a led lamp as a test lamp

[@janermejia555]

Bro, you’re the best man. Thanks for sharing your knowledge.

[@vijayakumarkumar9190]

Very good and useful information sir thanks for sharing the knowledge to us

[@HaseebElectronics]

Thanks and welcome

[@fredb1130]

Thank You I enjoy your videos. God Bless.

[@HaseebElectronics]

best regards 💗

[@repairguideman]

Hi, some of the electricians use"KLY POWER CIRCUIT" for repairing smps power supply.We want to know about this this circuit diagram and about its benifits or disadvantages. Does it safe to use it?. Please make a video about this kly circuit

[@samwikiwiki8274]

Salmon alikom Bro God bless u .4 your work. And spreading the knowledge. . But.1st.you say inputohms was ok... After test with lamb ...not ok .... Can explanation ..what can be OK ..from input resistance

[@HaseebElectronics]

Oh, Very great and deep observation thanks a lot for your comment kindly check video number 684 for your detailed answer. kzbin.info/www/bejne/aKfGooVnibqIY80

[@patrickdaka6507]

great video. Thanks

[@HaseebElectronics]

You are welcome!

[@omarykajuna2552]

Through your video I m going to be electronic engineer

[@davidlingaard860]

Thank you for your videos , i learn a lot from you.

[@HaseebElectronics]

it is my pleasure

[@orlan110352]

What is the model # of your desoldering pump and where can purchase it? Thank you .

[@HaseebElectronics]

it is WELLER WR3M rework station, made in Germany. please check video number 511 for more details about my rework tools

[@aliali-et7xh]

assalamualaikum..tq sir..learning something today..all about safety lamp..i aver try diy my power suply ..couse by lightning..but i dont anderstand ..step of safety repering power sulpy..n got bomm...diod..hhhaha..another part have short circuit..

[@Ahamed-iz2sc]

salaam bro, best video for beginners like me. very good explaination. good work.

[@HaseebElectronics]

it is my pleasure

[@Ff-kh6tn]

Sir you checked resistance with multimeter on the input of smps.any particular range is there.what is the use of measuring that resistance

[@HaseebElectronics]

Normally it is above 100k and above If it is some hundred ohms then it will be a problem

[@Ff-kh6tn]

@@HaseebElectronics sir I checked on ATX power supply smps of PC the voltage at the DC rail capacitor is 315vdc and it is maintaining.when I checked the circuit I found that the pwm ic tny2768pg source and drain was shorted,it has internal MOSFET.i checked in the circuit and it was shorted and I taken out from the circuit the ic still shorted.There is no output at the output side of smps and the fan is not working.but the fuse is not blown even the source and drain of ic was shorted.why

[@alimawali1443]

Thanks indeed for your great information .

[@HaseebElectronics]

it is my pleasure

[@zafariqbal7570]

Sir can we use anykind of lamp here?

[@HaseebElectronics]

We need to use old type Tungsten filament lamp 60 watt or 100 watt

[@yousafabbasi5570]

Sir this video is very good but my problem is the which IC you use in this circuit please guide me

[@arunkumar-bh2dp]

good explation of circuit repair

[@boybravo689]

Thumbs up done nice video presentation sir tnx

[@HaseebElectronics]

So nice of you

[@ravindraadapa2952]

Good one sir nicely explained

[@JohnJohn-fm3dx]

Great videos Haseeb. One question. Does the lamp must be 100w? Should a 60W or else work as well? I imagine it's all about not to burn the lamp because if the lamp burns out then the lod will fall onto the power supply fuse

[@sinjhguddu4974]

A great safety tutorial, thank you.

[@HaseebElectronics]

You're welcome!

[@W1RMD]

Awesome, Thank you and Happy Monday to you!

[@HaseebElectronics]

best regards ans special thanks Good Morning Brother

[@itechfone135]

Trés belle vidéo, j'apprend beaucoup avec vous. Merci!

[@HaseebElectronics]

le plus bienvenu. reste béni

[@billnaire5220]

Thank you for another great video.

[@HaseebElectronics]

best regards

[@thankyou7741]

Can you explain why resistance between two power terminal showed in mega ohm even its shorted?

[@t1d100]

I learned some new things! Thank you!

[@alexluz7023]

3:35 can you explain me why is best practive to remove ground wire connection for better safety!!! thx learning every day

[@ExtralargeafricanEes]

Can I use series lamp in inverter battery input

[@SujudElektro]

The best explanation thank u sir ❤

[@Yorumcu63]

Great video

[@HaseebElectronics]

best regards

[@arnelsace7076]

Hi mr. Haseeb, you have excellent videos. Do you know what is the replace IC of this ic number Hc2468?

[@aritrasinghachowdhury3227]

Good evening, Sir pls add some videos on automotive ecu/ecm troubleshooting.

[@votekunene9742]

Thank U very much this is quite wonderful.

[@Ru556]

I think what you are saying about the lamp is that it causes a large voltage drop across its filament if a short occurs in the circuit. A shorted current will flow, but it will be greatly reduced due to the voltage drop in the lamp. The short could occur after a number of otherwise good components. Is that correct?

[@williamchichewo2849]

HOW ARE YOU BROTHER THANKS FOR EVERYTHING WHAT YOU LEARN US YOU ARE MY HERO KEEP IT UP PLEASE,ANYWAY BROTHER I CANT GO WITHOUT ASKING A QUESTION I AM STRUGLLING WITH A 33 GIGA OHM RESISTOR THE COLOURS ARE ORANGE,ORANGE,WHITE AND GOLD SO MY QUASTION IS,IS THERE ANY CHANCE THIS RESISTOR CAN GIVE A CONTINUITY RESULT IF IT IS GOOD?

[@clems6989]

Aren't you creating a voltage divider with the light bulb. So only 1/2 voltage will be at the board ? Or am I thinking wrong?

[@HaseebElectronics]

exactly it is series load connected in series with input line of UUT / DUT. during normal operation the lamp will not effect too much but in case of hogh current consumption by UUT/DUT (during any failure / error / abnormality) the series lamp will protect the circuit from any further damage for example, if there is anything short circuited in UUT/DUT, the lamp will glow full instead of any possible damage in the UUT due to any unexpected short cirfcuit

[@clems6989]

@@HaseebElectronics Thank you sir !!

[@HarlavanisPanagiotis]

Another fantastic video dear friend 😌

[@HaseebElectronics]

best regards and special thanks

[@amma1837]

Thank you sir

[@matrikashrestha268]

thank u sir for this kind of great video..sir how we can know about the smps power supply ampere

[@HaseebElectronics]

please check video number 586 for current measurement

[@kovaifix7266]

What is the reason reverse probes in resistance mode ? any reason please tell us

[@skysurfhf]

Why live earth wire can't be on series lamp ? Thanks... Greatings from Portugal 🇵🇹 🌟

[@HaseebElectronics]

most welcome during repairing, in my experience that it is safe to use 2 wires (line & neutral) without earthing just connect earthing wire for final testing

[@Junq-b8v]

Yes very clear

[@baselkw4783]

you are the best keep going

[@Geeth...]

Is there any alternative method electronic protection circuit without blub

[@abdulwahab5957]

Asalam o Alikum sir ALLAH sy dua hi k apko salamt rakhy khush rakhy or sahat wali zindgi ada ker

[@homamalsrour5673]

Nice, thank you for your nice effort, my friend, I have a question, do you have an explanation about solar inverters?

[@ckngmad1357]

I try this safety bulb but with 160watt bulb instead Connect it to my atx power supply And the bulb is kinda half glowing Its measured 100ish volt on ac side And the dc side is 200ish Whats my problem sir? Is it short somewhere?

[@jitendramudpalliwar4812]

Sir, What should be the wattage of series lamp as compared to that of the object to be tested? Pl explain in detail.

[@aboothahiru6354]

Hai, I have doubt about resistor if defective or not,a 4 band(Brown-black-brown-gold) resistor in smps(de-soldered from PCB) is showing resistance of 3Megaohm but as per color code its value in the range 95 to 105ohm which means the resistor is open circuited (defective) ?

[@ΠάριςΑζής]

Yes. It's nominal value is 100 Ohm.

[@HaseebElectronics]

yes it is 100 ohm 5 % tolerance if it is out of limitations replace it

[@kenarf3332]

hello , can You tell a name of disordering device .

[@HaseebElectronics]

it is WELLER WR3M rework station, made in Germany. please check video number 511 for more details about my rework tools

[@jaym5938]

How do you determine neutral and live wires with a plug that doesn't seem to differentiated? In the U.S. we have neutral, live and earth.

[@pradeepmahendrasemage4043]

Nice.

[@HaseebElectronics]

it is my pleasure

[@mujtabanaqvitv7619]

So beautiful beautiful very very nice video your brother😍😍😍👍👍🌹🌹🌹

[@HaseebElectronics]

best regards and special thanks

[@warunakumara7671]

SIR THANK U FOR THE VIDEO , IAM WARUNA FROM SRILANKA SIR CAN U PLZ SHOW THE IC REMOVAL TOOL THAT U USING IN THIS VIDEO , THANK U SIR

[@HaseebElectronics]

thanks a lot it is WELLER WR3M made in germany you can find it online. it is abouve 3000 USD. its routine maintenance is also expensive i suggest to get HAKKO 701-15 that is cheaper than this and its maintanance is very low

[@adnandiab536]

Please mr haseeb I used series lamp First it was off but after few minutes the input mosfet burn and lamp became on So what happened and what reasons Thank you very much

[@HaseebElectronics]

MOSFET can damage due to any reason, (most of time, material failure) otherwise series lamp is best assisting tool

[@adnandiab536]

@@HaseebElectronics thanks again but i wanted to know why series lamp didn't protect the mosfet especially current never exceed half ampere.

[@FishingNOutdoorFun]

great info sir

[@HaseebElectronics]

best regards and special thanks

[@abdulwahab5957]

sir mujy ap sy ek request krrni hi k dynamic voltage stablizer pr b ek video bena dai

[@mohammadkhalid6886]

MBR60200PT (Vf= 0.90volts)(schottky diode) na mile to iske mutbadil kya hum 60F30S (Vf= 1.3volts) (fast recover diode) ya STTH6002CW (Vf= 0.75volts)(Ultra fast diode) ya FFA60UP20DN (Vf= 1.15volts)(Ultrafast diode) istemaal kar sakte hain kya , aur isme proper heatsink with fan istemaal karen to kitne “ Amp ” tak safe load use kar sakte hain ,,, behad shukriya ,,,,, 👍

[@muhammadishtiaq24]

Weldon keep sharing

[@HaseebElectronics]

best regards and special thanks

[@susantaatha6468]

Thank you for very good advice.

[@HaseebElectronics]

You are welcome!

[@pu8reLib]

very nice. sir i have branded atx ps its 5v ok, but when i turn it on, means green to ground then it turns on and immediately turns off, and on series; the lamp glows full then dim then full then dim but output 12.1v 5v remain stable, but 3.3 is 2.8, when i apply minor load, then off although on series.. main caps ok vcc cap ok, where is the fault.?

[@HaseebElectronics]

the problem is 3.3 section check capacitors in 3.3v section the lamp is turning on/off, that means the circuit have PFC circuit, PFC circuit needs more power input for turning ON. when we connect series lamp, it cannot produce full startup current by the PFC circuit for initial startup and voltage drop at atx's input, so the PFC turns off when it goes off, the voltage build up again, and it tries to start again just add one more lamp in parallel to the existing lamp or use next higher wattage lamp (if old lamp is 60 watt, use 100 watt. if old one is 100 use another 100 watt in parallel to the old 100 watt or remove old 100 watt and use 200 watts lamp

[@pu8reLib]

@@HaseebElectronics i m grateful to u for detail answer, u r right it have a pfc circuit, sir 3.3v caps i checked, its ok, is there chance of Schottky rectifier faulty,?

[@rohanranjandesilva465]

after lone time very good video sir how I will by same de soldering pump

[@HaseebElectronics]

best regards it is WELLER WR3M made in Germany you can check some local supplier or purchase online

[@wisher21uk]

Brilliant thanks 🙏

[@HaseebElectronics]

You're very welcome

[@gopalarao8578]

Thanks 🙏

[@HaseebElectronics]

best regards and special thanks

[@vijayakarekar]

Thanks...sir ji..,

[@HaseebElectronics]

So nice of you

[@azariayehezkel9064]

Hasseb. If you can explain how can check SMPS transistor failure. 🙏

[@ethiopiancameracatchs8843]

tnxs mr haseeb keep shareing

[@HaseebElectronics]

best regards and special thanks

[@wisher21uk]

May be worth pointing out use a incandescent bulb 100w is best (not LED or energy saving type)

[@HaseebElectronics]

yes brother it is incandescent (Tungsten Lamp 100 watt ) it is not LED lamp

[@milovanmitrovic-miks6174]

Thank you haseeb...

[@HaseebElectronics]

special thanks

[@rahulpatelgujratahmedabad3497]

GOOD TICHING KARTE HO AP THANKS 👌🌹👌🌹😆😂👌🌟💫

[@HaseebElectronics]

best regard and special thanks

[@jcsudeshchannel8224]

Experience got from you

[@abbaselekberov9033]

Allah bless you bro👋

[@HaseebElectronics]

best regards and special thanks

[@kannanr9533]

Thanks

[@HaseebElectronics]

Thanks a lot for your valuable support

[@calligraphe0125]

Thank you so much sir Hassib

[@HaseebElectronics]

Most welcome

[@FarhanCableWala]

MashaAllah great effort 👍🇵🇰

[@thomasabraham5276]

High input resistance still shows short.Howsir?.

[@kadjostephanekoua4008]

"Hello, if I don't have 320 volts at the output of the diode bridge, where could the problem be? Thanks in advance!"

[@malikaamir2670]

Check all the components until the bridge, like fuse, bridge itself