{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

[@BikramHazarika-v2e]

Greatest described video. Well done, Sir

[@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

[@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

[@rmjnm]

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

[@HaseebElectronics]

You are most welcome

[@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.

[@patrickdaka6507]

great video. Thanks

[@HaseebElectronics]

You are welcome!

[@herielrizk]

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

[@HaseebElectronics]

it is my pleasure

[@polskasopot]

Blessed be our Father in heaven for your wonderful work.

[@HaseebElectronics]

GOD's willing and GOD's blessings

[@ChrisHalden007]

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

[@juancolon8816]

Thank Haseeb for teaching us.

[@itechfone135]

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

[@HaseebElectronics]

le plus bienvenu. reste béni

[@jaymopromotions3958]

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

[@HaseebElectronics]

best regards and special thanks

[@chankokhoi4496]

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

[@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.

[@janermejia555]

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

[@ElectronicUrdu]

Nice video sir

[@HaseebElectronics]

thanks a lot bhai

[@alexwayo6983]

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

[@fredb1130]

Thank You I enjoy your videos. God Bless.

[@HaseebElectronics]

best regards 💗

[@nafez3945]

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

[@HaseebElectronics]

You are welcome

[@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...

[@vijayakumarkumar9190]

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

[@HaseebElectronics]

Thanks and welcome

[@osisegregory]

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

[@davidlingaard860]

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

[@HaseebElectronics]

it is my pleasure

[@amma1837]

Thank you sir

[@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)

[@sinjhguddu4974]

A great safety tutorial, thank you.

[@HaseebElectronics]

You're welcome!

[@abdulwahab5957]

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

[@omarykajuna2552]

Through your video I m going to be electronic engineer

[@t1d100]

I learned some new things! Thank you!

[@W1RMD]

Awesome, Thank you and Happy Monday to you!

[@HaseebElectronics]

best regards ans special thanks Good Morning Brother

[@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?

[@billnaire5220]

Thank you for another great video.

[@HaseebElectronics]

best regards

[@alimawali1443]

Thanks indeed for your great information .

[@HaseebElectronics]

it is my pleasure

[@SujudElektro]

The best explanation thank u sir ❤

[@Junq-b8v]

Yes very clear

[@Ahamed-iz2sc]

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

[@HaseebElectronics]

it is my pleasure

[@ravindraadapa2952]

Good one sir nicely explained

[@rahmatullahpopal9347]

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

[@jocshaikh2996]

بارك الله فيك

[@HaseebElectronics]

best regards and special thanks

[@arunkumar-bh2dp]

good explation of circuit repair

[@Yorumcu63]

Great video

[@HaseebElectronics]

best regards

[@votekunene9742]

Thank U very much this is quite wonderful.

[@HarlavanisPanagiotis]

Another fantastic video dear friend 😌

[@HaseebElectronics]

best regards and special thanks

[@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

[@omarykajuna2552]

Thax

[@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

[@gopalarao8578]

Thanks 🙏

[@HaseebElectronics]

best regards and special thanks

[@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..

[@mtrltoolman]

جزاك الله خير

[@HaseebElectronics]

اللہ یسلمک و یسعد صباحک

[@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

[@ethiopiancameracatchs8843]

tnxs mr haseeb keep shareing

[@HaseebElectronics]

best regards and special thanks

[@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

[@boybravo689]

Thumbs up done nice video presentation sir tnx

[@HaseebElectronics]

So nice of you

[@kannanr9533]

Thanks

[@HaseebElectronics]

Thanks a lot for your valuable support

[@electroniquepassion]

Bons conseils 👍👋👋

[@HaseebElectronics]

best regards and special thanks dear friend

[@pradeepmahendrasemage4043]

Nice.

[@HaseebElectronics]

it is my pleasure

[@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

[@baselkw4783]

you are the best keep going

[@wisher21uk]

Brilliant thanks 🙏

[@HaseebElectronics]

You're very welcome

[@thankyou7741]

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

[@susantaatha6468]

Thank you for very good advice.

[@HaseebElectronics]

You are welcome!

[@homamalsrour5673]

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

[@vijayakarekar]

Thanks...sir ji..,

[@HaseebElectronics]

So nice of you

[@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

[@FishingNOutdoorFun]

great info sir

[@HaseebElectronics]

best regards and special thanks

[@aritrasinghachowdhury3227]

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

[@rahulpatelgujratahmedabad3497]

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

[@HaseebElectronics]

best regard and special thanks

[@ExtralargeafricanEes]

Can I use series lamp in inverter battery input

[@arnelsace7076]

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

[@mujtabanaqvitv7619]

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

[@HaseebElectronics]

best regards and special thanks

[@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?

[@milovanmitrovic-miks6174]

Thank you haseeb...

[@HaseebElectronics]

special thanks

[@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?

[@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

[@zafariqbal7570]

Sir can we use anykind of lamp here?

[@HaseebElectronics]

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

[@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

[@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

[@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

[@jcsudeshchannel8224]

Experience got from you

[@calligraphe0125]

Thank you so much sir Hassib

[@HaseebElectronics]

Most welcome

[@yousafabbasi5570]

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

[@FarhanCableWala]

MashaAllah great effort 👍🇵🇰

[@steve6375]

Doesn't make sense? If there was a short, why was the fuse not blown? Maybe you replaced the fuse without telling us?

[@HaseebElectronics]

great it's fuse was burnt out and I already bypassed fuse with 1 ampere buss fuse wire to demonstrate the problem instead of proceeding to input short circuit diagnostics

[@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 !!

[@alexluz7023]

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

[@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

[@abdulwahab5957]

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

[@Geeth...]

Is there any alternative method electronic protection circuit without blub

[@kovaifix7266]

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

[@suatbulat9599]

👏👏

[@azariayehezkel9064]

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

[@nayanjagirdar8408]

👌👌👌👍

[@HaseebElectronics]

best regards and special thanks

[@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.

[@abbaselekberov9033]

Allah bless you bro👋

[@HaseebElectronics]

best regards and special thanks

[@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

[@jitendramudpalliwar4812]

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