Glad it was helpful!

Thanks

Salamat

It is a relatively simple circuit having very few components when compared to some power supplies. I too look for obvious failures beginning with visual inspection, then move to passive components considering there's not many to test.

Theoretically it is good to use the half approach but you need to switch on the circuit to test the in and out voltage and the risk of touching live wires is high. Going through component by component should not be a problem as you can see very few components are there in the whole circuit

Thanks

Most of my experience from karl storz light source are transformer problem.

Thanks

Most welcome

Thank you too

Thanks

Maraming salamat sir. More power

Same wattage. 1 watt

You said 3 W in another reply

Welcome

Yup

Thanks

Thanks

Thanks

Genius

Sa Saudi po ako naka based. Marami po dyan sa pinas gumagawa nyan.🙂

@@biomedicalelectronicsengin7192 ok po sir salamat, pwede ask kung may e recomend ka na andito sa pinas at salamat sir

They are the same power rating 3W

Pa shout out naman dyan Biomed from UAE Dubai.

On next video. Noted

@@biomedicalelectronicsengin7192 Ilang taon kana dyan nag work Saudi?

@@FlorentinoJrEstil mga 9 pa lng.

Salamat

Thanks

Gamit ko Matsuo Handa

Optocoupler

@@biomedicalelectronicsengin7192 what is the use of the optocoupler?

@@rodym1681 It's a switch. 2 legs are connected to an IR LED and other 2 legs to a photo transistor that catches the light from the LED. This allows one circuit to turn on the other circuit while keeping isolated from each other. It's common in circuits where interference from the High Voltage circuit must not go to the Low Voltage circuit like audio, video and medical equipments.

@@eustacehendrix9659 An optocoupler, as it's name implies, is NOT a switch (although it can perform like that) but it is a device that couples optically (i.e. not electrically) two different circuits. Its purpose is a) to keep these two circuits electrically isolated, but also b) to allow the control of the circuit using its internal opto-transistor (controlled device) by the circuit using its internal photo-diode (controlling device). The type of control now, can be either digital (ON-OFF of a power device like a transistor), or analog, which is the case in this application. In other words, the light intensity of its internal photodiode represents the desired output voltage of the power supply, as its opto-transistor conducts in a linearly increasing (or decreasing) manner according to the infrared light density emitted by the photo-diode. Therefore, if the power supply output voltage tends to increase, then the photodiode emits more light, as the current within it will increase, forcing the opto-transistor to conduct more than before, informing the P.W.M controller that it needs in turn to reduce the width of its output pulses in order to have the output voltage reduced accordingly. Inversely, the procedure will increase the output voltage (in case the load demands more current) keeping the output voltage constant. So the optocoupler seems to be rather an optical controller, not a switch whatsoever.

It is more accurate to test the components off the board.

Electrons will travel through the path of least resistance which is usually the component that you're testing as opposed to going the other way where the resistance of all other components will be added, not to mention there's almost always a diode that will make sure the other way is not a short circuit. Testing on board helps you localize the problem then you take the components out one by one and test off board to double check.

@@eustacehendrix9659 Nice explanation , thanks!

​@@eustacehendrix9659the diode then makes the fluctuation of the 120k resistor which is busted

I checked and tested rectifier bridge in circuit and got bad reading. No double voltage from neg to pos. Took it out and it tested good.

Yep....jeddah