A 160 w crt tv power supply using ncp37 prepared by. How to completely check the high voltage circuit in crt. Record the voltage and repeat this procedure until you reach the maximum voltage on the power. View and download zenith h19f34dt series service manual online. The genvolt cr25 series cathode ray tube power supply with current limiting circuits. Magnetic interference emi signature and improved efficiency. Users will see desk top computers with the computational power of todays supercomputers. Tv circuit board diagram repair pdf data wiring diagram.
Using dps deflection power supply supply enough voltage to move the spot from the center by one division 116. Leads from each plate penetrate the crt envelope for connection to external excitation sources. The beam in the crt shown passes first between the vertical deflection plates, then the horizontal. How to troubleshoot crt television switch mode power. Understanding the operation of a crt monitor an656 national semiconductor application note 656 zahid rahim november 1989 understanding the operation of a crt monitor computer technology is going to see major advances in the 1990s.
A crt and power supply alone function as a crude oscilloscope. How to work str5q0765rt in crt tv power supply youtube television circuit diagram wiring diagram schematic name. Optimizing efficiency and standby power with the ucc28056 in offline application rev. Repurpose an old crt computer monitor as a high voltage.
Nicolas cyr on semiconductor introduction valley switching converters, also known as quasi. Continue to increase the deflecting voltage until you move the spot one more division. Here is the circuit diagram of a simple 100 watt inverter using ic cd4047 and mosfet irf540. Steven dufresne from steps us through a very simple conversion of a crt computer monitor into a highvoltage power supply. Crt tv circuit board diagram circuit diagram images. Lg crt tv circuit diagram pdf circuit diagram images.