Question about Televison & Video
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Posted on Jan 02, 2017
SOURCE: Akai 25
try to check its high voltage section for axed HOT or flyback. Also check its regulator. Maybe start up resistor or check the chopper circuit. You should at least have an standby voltage on the secondary side.
Posted on Oct 28, 2009
The SMPS - power supply is critical of the generated frequency , load trip and high voltage. So if the power transistor has blown then you must check the reason for the failure before the new one is put into the circuit. Check the DC voltage, check the rectifier, storage capacitor and the frequency oscillator. check for short in the SM tranformer , feedback optocouplers or a possible short in the main circuit.
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Posted on Feb 08, 2011
Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Type in this key phrase " my service table today " in the search box at the top right of the the home page, to get gathered some pages which has the details of practical experiences of the author of that site. The search result might display about 20 Nos of related posts. Press the "All posts" at the bottom of the list, then you can select them one by one.
Posted on Jan 13, 2017
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