Re: Acer Spin 3, N17W5 MOBO: Slinky MB 17893-1
Thank You very much. I'll look into it, and try to find the culprit.
Thank You once more!
I hope that I can fix it with my minor knowledge
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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Re: Slinky 17893-1 Schematic needed
The U6401 probably powers the daughterboard USB 2.0.
U3501 pin 4: 9 Ohms resistance to ground without desoldering.
It's on the opposite site of the board, and its for USB3.0.
Next to it, theres one more EU3503, with 6 pins, probably for second usb 3.0, and pin 5 has also 9 Ohms.
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Re: Slinky 17893-1 Schematic needed
I've desoldered it, and pin 4 has 9 Ohms when measured to ground...
I think its too small. What do you think? Maybe its shorted somewhere else?
This blew up, when user pushed the "battery reset" button on the daughter board which also has 1 USB 2.0 port, audio jack, sd card reader, LED's and power switch (so it must be connected).
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Acer Spin 3, N17W5 MOBO: Slinky MB 17893-1
I've got a problem with the same model.
Acer Spin 3, N17W5;
MOBO: Slinky MB 17893-1
Does anyone have maybe a schematic and/or boardview?
I've got a burnt component.
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Re: B+ Voltage rail; Lenovo Y510p VIQY1 NM-A032
No, not yet. I could order it new, and try to replace it, but I would like to learn, how to know if its broken:-)
PQ310 Voltages:
pins 1-3: 0,8V (its the same voltage as PQ302 output)
pin 4: 3,5V
pins 5-8: 1,2V
No shorts
PU301 pin 20: 19,5V
PU301 pin 16: 6V
So yes, those are the voltages present....
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Re: B+ Voltage rail; Lenovo Y510p VIQY1 NM-A032
I've removed the PQ303 and measured its resistance:
Pin 1 - IN; 2 -GND; 3-OUT
1-2 95 KOhms no matter the polarisation
1-3 6,75 MOhms with red on 1; no reading opposite
2-3 6,75 MOhms with red on 2; no reasing opposite
In diode mode: no reading no matter which pin and which polarisation.
Quick google for schematic and added it in attachement....
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Re: B+ Voltage rail; Lenovo Y510p VIQY1 NM-A032
Picture with voltage measurements in attachment.
The second schematic screenshot shows the gate for PQ301. If I have 19,5V on gate there, then something attached to it should give 19,5V right? Either Green line, Yellow line, or from the mosfet itself (which shoudln't happen given the resistances from before right?)...
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Re: B+ Voltage rail; Lenovo Y510p VIQY1 NM-A032
Pin 3 is 0V
Pin 4 is 0,08V and slooowly falling down
Next measurement:
pin 3: 0V
pin 4: 0,125 and falling down. The longer the power is in, the lower Voltage it has. After reconnecting 20V, it goes up to 0,125V...Last edited by ITworkshop; 05-16-2022, 07:45 AM.
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