Re: Acer Swift 3 SF314-51 no power up -shorted inductors
Well i desoldered ic and we dont have any shorts. Ι will order the ic from arrow. If i am not wrong the pin 27 is going to a 10k and then +3VA. if i measure right the R3142 is 0.2 ohms. this could cause a problem?...
konpdan25
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Last Activity: 12-15-2022, 03:06 PM
Joined: 03-31-2021
Location: Κορινθος
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Re: Acer Swift 3 SF314-51 no power up -shorted inductors
Here are the readings. I see that before the short the readings are not good. is it any chance that power regulator was damaged from the begining? i will desolder the ic and i ll check for shorts....Leave a comment:
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Re: Acer Swift 3 SF314-51 no power up -shorted inductors
OK so from the measurements I took we have problem with the TPS51225CRUKR. And in the try to measure again I made a short and now the chip is dead some pins. I checked for the chip but is unavailable at ti and mouser. Any suggestions?Leave a comment:
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Re: Acer Swift 3 SF314-51 no power up -shorted inductors
OK so the measurements Tha I posted are right!Leave a comment:
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Re: Acer Swift 3 SF314-51 no power up -shorted inductors
Pin no. 1 is on the right?? As we see the picture??...Leave a comment:
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Re: Acer Swift 3 SF314-51 no power up -shorted inductors
OK, well according to schematic we have problem. The con3101 at pin 27 without the ribbon has 200milivolt. I shorted to ground nothing. Pin 1 3.3volt. Pin 2 ground. Pin 3-10 3.3v pin 11 - 26 0v pin 28 0vLeave a comment:
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Re: Acer Swift 3 SF314-51 no power up -shorted inductors
Yes of course! Take your time!Leave a comment:
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Re: Acer Swift 3 SF314-51 no power up -shorted inductors
If you have patience and you can guide me how and where to measure would be awsome. to check resistance of mosfets shoud they desolder? i attach you the schematic.
[B][COLOR="Red"]MOD Edit: Schematic link ->[/COLOR][/B] [url]https://www.badcaps.net/forum/showthread.php?t=121098[/url]
.Re: Acer Swift 3 SF314-51 no power up -shorted inductors
If you have patience and you can guide me how and where to measure would be awsome. to check resistance of mosfets shoud they desolder?Last edited by SMDFlea; 07-11-2023, 12:12 PM.Leave a comment:
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Re: Acer Swift 3 SF314-51 no power up -shorted inductors
No my bad. The resistances are 7 ohm, 10 ohm and 7 ohm at the point That voltaze is zero. The other coils have bigger resistances. I measured the two mosfet of DC input. Both of them have source and drain at 19v and gates 24v.Leave a comment:
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Re: Acer Swift 3 SF314-51 no power up -shorted inductors
I measure 0 ohms. I downloaded the schematic but I am not so familiar. Maybe they are cpu core rails.Leave a comment:
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Acer Swift 3 SF314-51 no power up -shorted inductors
Hello everyone,
i face a problem with that laptop. The laptop dosnt power up. when i insert 19v a blue led stays solid, pressing the power up button and nothing happens. I make the reset method and still nothing. I disconnect the battery the same. So according previous post i took measurments on the board. I am attaching the photo with the measurments. i noticed that 3 conductors are shorted to ground and this may be the problem. If anyone can help to find the short , or to give me some advice on how to find it , i would be grateful.... -
Re: Philips 55PUS6262/12 always ON but no picture
Hello, I have the same problem. No picture, backlight is on and the remote doesn't respond. Could you explain the procedure of the steps you made? You take a USB and put a file XXXXX.pkg. You plugged it the TV and booted from that.?...Leave a comment:
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