Chosen Solution
my dvd player isn’t turning on..so I open it and checked in power supply for output voltage and I didn’t find any voltage in output segments.its build on tny176pn ic. I started with fuse which is ok..than for any open diodes and found none..I checked the opticoupler for little voltage which I expected and there’s none. I measure the tny176pn ic’s en pin and also no voltage. so what should I go for?? thank you!!
These units use what is called a switch mode supply. Can I assume that you have the 5V standby voltage around? If not, then there are further problems. Anyway… Can you post a picture of the power supply board? It will be easier to direct you on what to check if I can reference a picture. I suspect that what I call the kick-starter capacitor has failed. This is usually a 2.2ufd capacitor in the 50V range that starts the oscillations of the switch mode supply. With a picture I should be able to direct you to the part. Dan
