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{1154} Crestron SMPS no output
Рет қаралды 4,568
Ай бұрынIn this video number {1154} Crestron power supply repair, No output solution. I explained how to repair 24 volt 4 ampere crestron electronics inc, rockleigh NJ (New Jersy) model number CNPWSI-75, it is UC3842 based switch mode power supply for Crestron automation control system.
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#crestron #smpsrepair #restoration #electronics
@osamanassr2645 10 күн бұрын
I really love this channel keep up the good work, I'm a Mechatronics engineer and I learned from this channel more than I learned from college
@HaseebElectronics 10 күн бұрын
welcome dear Engineer. thanks a lot for writing valuable words for my efforts
@hichamtassi1753 Ай бұрын
Salam Dear Ashraf, always a pleasure to watch your videos. Have a great summer. Greetings from Morocco.
@feeldiben Ай бұрын
Thank you Mister Haseeb for all your time and patience to teach us your great knowledge
@nuritepegoz6042 Ай бұрын
sn : ustam herzamanki gibi maşallah mükemmelsiniz ellerinize sağlık
@ISO07ISO Ай бұрын
Seni takdir ediyorum usta hocam👏👏👏
@fatih81 Ай бұрын
Ustalık sergiliyorsunuz değişik cihaz bizleri de öğrenme tamir etme hevesi artıyor seviliyorsunuz takipteyim.
@saarike Ай бұрын
Simply Great!!! Thank you
@HaseebElectronics Ай бұрын
You are welcome!
@proudlytamilan1401 Ай бұрын
Sir nice video ,how to find leaky capacitor, transistor, diode and find good or bad cap non polar cap. Please upload one video
@rolanddejesus8685 Ай бұрын
thank you very much sir...god bless.
@محمدالزعبي-ع2د Ай бұрын
ماشاءالله تبارك الرحمن
@chuckvoss9344 Ай бұрын
thank you for sharing with us.
@Rithuservice Ай бұрын
Good job 👍 , which type of solder iron you're using in this video
@muhammadishtiaq24 Ай бұрын
Excellent thanks for sharing❤❤
@SandraGerez66 Ай бұрын
Good video
@sublimeelectrons8699 Ай бұрын
HI SIR @Haseeb may i know where i could possibly buy your solder sucker? The one you used on removing the IC 3842.
@gsatya9732 Ай бұрын
Sir my atx power supply all voltage are fluctuating but stand by voltage 5 volt coming. What may the problem?
@salehneyestani7627 Ай бұрын
How u recognize the Ic chip is damaged? When we not have feedback voltage, first we check resistants in feedback rail. But you first go to Ic chip directly
@HaseebElectronics Ай бұрын
in any SMPS first check point is DC rail, then VCC capacitor then output capacitor then feedback circuit feedback circuit is the lastest step
@salehneyestani7627 Ай бұрын
@@HaseebElectronicsI watched it again carefully. I made a mistake. I thinked at first time, you said feedback pin. But in real you said refrence pin. Yes, when refrence pin has no voltage, the IC chip is damage 👍
@HaseebElectronics Ай бұрын
no problem. right now i recorded a detailed troubleshooting flowchart i hope it will a good addition
@tvbox8478 3 күн бұрын
👍
@ahmetakyel9161 Ай бұрын
Hi, what must be the reference voltage at that ic pin number 8?
@Ngage9913 Ай бұрын
Good work bro....
@user-vt2dq8cv3f Ай бұрын
Can't you provide external ref voltage if internal is missing ; thank you: Zambia
@HaseebElectronics Ай бұрын
no we cannot inject external reference voltage because these volatge are also used for internal biasings for the chip and external for ocillation and error amplifiers biasing
@vivekbalakrishnan5520 Ай бұрын
Good . sir can you pls make a video to decrease the output supply of smps. i tried once with changing the voltage divider network to with trim pot but when decreasing. the voltage getting low and after few steps of rotation the voltage jumps to high I need to change 12v 2amps smps to 5v
@burzaroma-vasile8442 28 күн бұрын
Hella Sir! What cause the IC to damage? In this case or other PS! Thank you!
@thirukumarang5842 Ай бұрын
Please show new chip reference vcc?
@isahizhenfahm6576 Ай бұрын
Sir, if I may ask. What's the name of the microscope you're using?
@HaseebElectronics Ай бұрын
it is ANDONSTAR AD407Pro
@aliemlek Ай бұрын
👌👌👍👍
@ilanbinkovitch6054 Ай бұрын
hello. What are the glue drops, on many components, for ? thank you
@perkulant4629 Ай бұрын
To protect against component vibration.
@TheJavaSync Ай бұрын
Flyback topology?
@faridcofely Ай бұрын
ref voltage ???
@HaseebElectronics Ай бұрын
refernce volatge are 5 volt at pin number 8 of 384X series IC ( 3842, 3843, 3844, 3845) these are provided by its internal voltage regulator these will provide biasing for error amplifiers, oscillator section and internal circuit of the chip
@faridcofely Ай бұрын
you didn't test the ref voltage after repairing
@HaseebElectronics Ай бұрын
when the output is available. that is assumed the reference voltage are good in my previous many videos i demonstrated to test refernce volatge it is 4.95 to 5 volt if refence voltage are not good, the output will not stable or low output or SMPS will start whistelling sounds
@faridcofely Ай бұрын
@@HaseebElectronics many thanks you are very good . i appreciate your prompt response
@HaseebElectronics Ай бұрын
@@faridcofely it is my pleasure
@rolanddejesus8685 Ай бұрын
thank you very much sir...god bless.
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