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|chinese supply transistor.pdf||Illustrated guide to diagnosis and repair of Chinese supply transistor
These supplies when analyzed calmly and with the help of the diagram are not as complicated to repair as many would argue repair. Note that I say. To begin, note that this basically consists of four transistors as follows :
1. The switching usually found marked V513 and reference 2SC4458S or equivalent NTE2594 whose characteristics can be noticed in the following screenshot :
2. The current limiter marked V512 , reference 2SC3807 (NTE2504) which should place the original because it is "special", note its factor gain.
3. The third transistor marked with reference 2SA1015Y (NTE290A) is the coupler and error amplifier
4. The fourth is the V553 as one 2SC1815 (NTE85) forming the discrete error detector.
That means it's the equivalent with their coworkers (potentiometer RP551, the R552, R553, R554
resistors, and VD561) the known TL431 or SExx family. Let's make a parenthesis to give good reasons, motivating him to|
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