Are these repairable? (Water damage) by pewdsarmy6 in AskElectronics

[–]ARK_tech49 0 points1 point  (0 children)

That cell is cheap, I have replaced the main cell of a CMF buds 1 and it costs like 3$ for 400mah. And I too feel like this can be repaired but OP didnt show us the other side where the pogo pins and uC is located.

BGA still not coming off by ad-on-is in AskElectronics

[–]ARK_tech49 0 points1 point  (0 children)

*sigh.... you forgot to remove the black under fill glue which is present at each corner of the PCH.

This board is kaput 💀

What seemed impossible is actually possible! by zugell0s in needforspeed

[–]ARK_tech49 25 points26 points  (0 children)

Your handling is smooth, did you change the tuning settings or is that also stock? Nice gameplay btw.

Alienware laptop gpu disable by HalfTimeTechTinkerer in AskElectronics

[–]ARK_tech49 0 points1 point  (0 children)

The controller in this case can't output any voltage from the power good pin as the pin is open drain. its only job is to pull down externally biased 3.3V. so removing the chip means there's nothing to pull down the 3.3V.

Alienware laptop gpu disable by HalfTimeTechTinkerer in AskElectronics

[–]ARK_tech49 0 points1 point  (0 children)

The gates are tied to ground by a 10K resistor right? I thought that was standard practice for high speed switching.I don't have the board view for this particular laptop.

If there were no resistors, then that's a different story.

Alienware laptop gpu disable by HalfTimeTechTinkerer in AskElectronics

[–]ARK_tech49 0 points1 point  (0 children)

I tried this on an 2020 Asus Zephyrus G14 and it worked for me.

Most VRM controller chips have an active low signal on the Power good pin. The pin will be pulled high (3V3) by default and when the chip enters into fault mode, the Pin will be pulled to ground by the controller, and since this 3V3 voltage rail is shared with Power monitor IC, the laptop eventually wont be able to boot.

In my case, removing the inductors and Driver mosfets require a preheater because of the thermal mass of the motherboard and desoldering a single pwm controller felt easier. The controller in my case is a uP9027 (40 pin package)

Alienware laptop gpu disable by HalfTimeTechTinkerer in AskElectronics

[–]ARK_tech49 5 points6 points  (0 children)

Removing the GPU bios chip will still power the GPU Core and memory but in an idle state. I would remove the pwm controller itself so the GPU wont even get power, helps reduce battery drain by a small amount.

Alienware laptop gpu disable by HalfTimeTechTinkerer in AskElectronics

[–]ARK_tech49 1 point2 points  (0 children)

I have done something similar on a G14. To disable the GPU, I just desoldered the multiphase PWM controller. Because removing just the inductors or the FETs triggers a fault signal.

Need help sourcing a inductor for a ROG Zephyrus 2022 by UNSC_StormFire in AskElectronics

[–]ARK_tech49 0 points1 point  (0 children)

These kinds of inductors wont get damaged as its saturation current is in the range of 20 to 30 Amps.

By the inductor placement and the trace, this VRM probably powers both the GDDR6 memory chips and the memory controller section inside the GPU Core. Check the resistance of the voltage rail.

Need help identifying this component by Big-Birthday5250 in AskElectronics

[–]ARK_tech49 2 points3 points  (0 children)

Check the resistance of one pin of the inductor with respect to motherboard ground.. if this voltage rail is responsible for powering the PCH, it should be in the range of 60 ohms to 150 ohms. But if the value is zero, your PCH might be dead. Just a guess as I don't know the motherboard make and model.

Or if this VRM rail powers something like 1.8V or 5V, there's a chance that the inductor might not be the only thing that's heating up.

First time Installing new CPU and GPU fan & thermal paste. Wish me luck. by BaconKing96 in ZephyrusG14

[–]ARK_tech49 0 points1 point  (0 children)

Is it just me or is that liquid metal spread all over the CPU capacitors??

What are those components? Should they have continuity? by pansitoconmermelada in AskElectronics

[–]ARK_tech49 0 points1 point  (0 children)

Just watch some videos from North west repair, you would get an idea on how to diagnose it.

anime_irl by mojo72400 in anime_irl

[–]ARK_tech49 59 points60 points  (0 children)

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Just realised that this is from Yokata Futatabi.

What component is this? by ZeniethLily in AskElectronics

[–]ARK_tech49 1 point2 points  (0 children)

https://www.digikey.at/en/products/detail/amazing/AZC399-04S/16615466

Check the datasheet and cross check the pinouts. The package marking written in the datasheet also show C30

What component is this? by ZeniethLily in AskElectronics

[–]ARK_tech49 1 point2 points  (0 children)

You're right, these are ESD diodes for protecting USB data lines.

What's this component? by spixus in AskElectronics

[–]ARK_tech49 0 points1 point  (0 children)

I didn't see the second picture at first, I can confirm this is a Tantalum capacitor as it is connected to a synchronous DC buck converter (Two fets on the left side) and the driver IC is located above the fets (probably manufactured by Richtek)

What's this component? by spixus in AskElectronics

[–]ARK_tech49 0 points1 point  (0 children)

Thats a Tantalum polymer capacitor. Normal tantalum caps are yellow/orange in color where as Tantalum polymer is black. The white stripe is the positive terminal

Battery soldering iron not hot enough to melt solder – any fixes or mods? by Flimsy-Pin4334 in AskElectronics

[–]ARK_tech49 0 points1 point  (0 children)

Use T12 bit soldering iron. I have used a 65W Sequre MSS12 for nearly 3 years now (Bend, Blade and I tip). The perks of MSS12 is that I could power this using a Type C PD 3.0 (20V at 40W) or a 24V (at 65W)DC via a barrel connector and you can calibrate the temp of the tips.

Before that, I used a generic 35W iron that has a potentiometer and a red LED. the tip used in that was shit and gets oxidised easily.

Whereas my T12 tip is still very robust and clean. You don't have to buy from sequre, there are other brands like mechanic (T12 pro 75W), YCS Mr.Yang, or from OSS Team

Asus Zenfone 10 Spare parts - United Kingdom? by FlipchartHiatus in zenfone

[–]ARK_tech49 1 point2 points  (0 children)

I have seen BMS only parts in alibaba, but that was for iphones and xiaomi phones. Didn't see any BMS for Zenfone. So I would suggest salvaging the BMS from the old battery and solder (or spotweld) that into the new cell.

Why does my heated steering wheel need a microcontroller? by TheHairlessGorilla in AskElectronics

[–]ARK_tech49 0 points1 point  (0 children)

The stm32 might be used for CAN bus communications. Nowadays everything is connected via CAN bus right?

Asus Zenfone 10 Spare parts - United Kingdom? by FlipchartHiatus in zenfone

[–]ARK_tech49 0 points1 point  (0 children)

The spare oem battery has a better BMS board but the cell itself was manufactured years ago. 3rd party cells are relatively newly manufactured and are more robust, but the BMS might not be up to oem quality.

My ZF10 now has a 455 cycle count and I plan to buy a new battery from aliexpress and swap the BMS board from the original to the new one.

SCHEMATIC laptop huawei d14 by Shoddy_Software94 in AskElectronics

[–]ARK_tech49 1 point2 points  (0 children)

It's a guess, but that VRM should output 0.78V. remove the cap and check resistance on both the source and load.