1npdf 1nfiletype-pdf 1npdf 1ngp-fagor-pdf 1nws- pdf 1ndatasheet-pdf 1npdf 1ndiode-pdf. SONY BRAVIA LCD TV SERVICE MANUAL FILETYPE DOWNLOAD – Printed Wiring Boards and Schematic Related Posts IN EPUB DOWNLOAD. File Type: jpg, XR electrical I’m gonna try it with some 1N diodes, 1,uF/50V caps, and a LM regulator. I read something.
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Diode Test gg is right, look at the characteristics in the datasheet.
Per Hansson ignore the above message Thanks for sharing it I really like it this kind of information Thanks for your information. I hate DMM’s it should read open circuit one direct Very high resistance near short the other actually I think your reading a voltage drop across it or something. Cancel reply Leave a Comment.
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But now just a number of LED’s get lit when I power it on, and they stay that way, no matter if I remove the diode or not You can check with the DMM if the circuit is like your board.
Find More Posts by gg Thank you for the efforts you made in writing this post. To open downloaded files you need acrobat reader or similar pdf reader program. Diode Test Per Hansson ignore the above message For sure it is not recommended to remove the diode because the energy stored in the inductor must find another path to discharge, so you don’t know what it causes in the circuit. Is the diode ok or not?
In582 through strength, but through persistence.
Diode Test I’ve got a Fluke here in front of me at work, and according to it, it’s measuring volts DC. Without load I had the output voltage but as soon as I connected the load a resistor the IC has died My board is different from your circuit, it has a monolithic IC, so I don’t know if the behavior it is the same.
Originally Posted by Per Hansson I fileetype check the voltage into the small fet before I lifted it and it was around 4v in and 3. Find More Posts by Gianni.
Is there a cost? Remember, amateurs built the ark. Diode Test Per Hansson: Find More Posts by Per Hansson. The forward voltage that i’ve measured is very close to the nominal 0.
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The best is to have a lab PSU with adjustable output voltage and with current limiter so if something is wrong in the circuit you can avoid to burn everything just limiting the current. I’m sorry it died. Good luck to the repair! Any PMs asking for assistance will be ignored. Another reason why the FET becomes hot could be a problem in the driving signal on GATE pin, but in this case you should use an oscilloscope to check voltages.
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Originally Posted by Per Hansson with it lifted there is 10v on the in side which is lifted Diode Test Plainbill I think the diode is the freewheeling diode used to discharge the energy in the smoothing toroidal inductor, if this is a step down converter.
So I lifted the small fet instead and then the ethernet chip became dead, led’s dead and I measured ca 0. I think you have measured wrong values, in the attached pic I see R67 has 3 digit number likeso it should be ohm.
Diode Test I cracked open the AC adapter first thing I did, it’s very simple with only a transformer, a cap, one resistor and 4 diodes to filftype DC current I checked the capacitor and it was ok, both ESR and capacitance Find More Posts by PlainBill.
The post is absolutely fantastic! Ne les sony bravia lcd tv service manual filetype que par des composants Sony dont le numero de piece est indique dans le present manuel filetyep dans des supplements publies par Sony.
Access the Service Menu by pressing the following buttons on the Remote Commander within a filetyp Looking for a suggestion of what part will cause this?
Madison, IN My Country: I cracked open the AC adapter first thing I did, it’s very simple with only a transformer, a cap, one resistor and 4 diodes to form DC current I checked the capacitor and it was in58222, both ESR and capacitance I read nothing in the direction you should not be able to read anything And in the “forward” direction I read 0.
Google for the 1N datasheet, on the second page, look at the “forward voltage characteristics”. Please leave a comment below and we will be happy to assist.
The picture can be seen but jumping double image. Plainbill I think the diode is the freewheeling diode used to discharge the energy in the smoothing toroidal inductor, if this is a step down converter. They made my work so simple. I also tested the D-Link switch with another known good adapter and behaviour was the same Unfortunantey I think I may have killed it now with my testing, before as I said without the diode or FET it would actually power up and blink it’s lights It did a real diagnostics test, first power turned on then it blinked each port’s light to let you know it was working The voltage measured into the switching chip that does the ethernet magic is ca 3.
I also seem to have forgot to add the pic, so here it is, 2: Maybe there’s a short circuit after it and the current is so high to run it very hot.
Per Hansson you can calculate the output voltage if you can identify the resistors connected between output-PIN5-ground.
Diode Test Google for the 1N datasheet, on the second page, look at the “forward voltage characteristics”. In addition, some files are archived, so you need WinZip or WinRar to open that files. I did a quick test on a step down board in my lab: