Hi all,
I have kiiboom phantom 81 V2 purple. I need a firmware flasher so that I can manually flash it as it is not recognized by the kiiboom software.
The MCU is Yichip YC3121-L. All helps are greatly appreciated. Thank you
Hi all
I have Logitech G535 dongle that is broken in two. I managed to trace all the D- and D+ pins, but I cannot find where the VCC pin goes to. The trace is broken and cannot reach MCU.
The MCU info is:
MCU: M27P8V 1N71K GDSHA 32 pins
Part Marking: M27P8V
Part Number: MKL27Z256VFM4 (Kinetis KL27 Series Microcontroller)
I manage to find the datasheet, but the datasheet does not show where VCC is. Only VREGIN. Can I just run jumper wire from VCC pad to VRegin? Also, I am new at reading datasheet. How to find out what input voltage is needed by the MCU and where can I soldered jumper from the V+ USB Pad to?
If you check on my picture, the V+ pad from usb has a via goes thru the bottom side, and connected to a diode marked SQ and a capacitor. The cap is connected to the anode of the diode, but the cathode does not seem to connect to anywhere since it is broken. Do you think I should set a jumper to MCU directly from the cathode? If so, which pin?
Thank you
Here is the datasheet I found: https://www.nxp.com/docs/en/data-sheet/KL27P64M48SF6.pdf
Hare are some pictures to the device:
This is the broken part of the USB that should connect to USB Port (bottom side)
Hi All
I need to find the datasheet for an IC from a mechanical keyboard MAD68HE Max. This IC is labeled U1 on the PCB with marking AEy4A.
The IC is receiving 4.5V from ACy49 (U3) pin 2, which is directly connected to VBUS. The input came from, what I believe to be, pin 1 (Top right) but the outputs are all 0V. It seems the AEy4A is shorted and probably blown.
When I asked gemini, I know, I am desperate, here is what gemini said:
My manual measurement on the voltage is like the picture above, where I should be receiving 4.5v in and the pin across 4.5V should be 4.5 too since it powers the light. Meanwhile the pins at bottom left is not going anywhere and the pins at the bottom right goes somewhere, I have not trace it yet. Hoping to find some datasheet.
Any helps is much appreciated.
Thank you
Hi All
I need help to check on the PCB of a keyboard. The lights at the circled are shorted to the back light. After checking it seems the diode for the keys are dragged much lower compared to the healthy one (100k vs 600k).
The key in the circled area cannot be pressed and it is connected to pin 2 in the MCU. Pin 2 in MCU produced very unusually high voltage compared to the other column. 1.76V vs just 300mv.
I removed all the Diode, the mosfet for that troubled column, and finally I traced to something marked Z2. What is Z2? It has marking B8 and it looks like a diode? Please help find me the datasheet. Thank you in advanced.
I tried to put it under my flimsy usb microscope and it looked like this.
Hi all
I need to check if there is datasheet for this IC. The marking is: 5TWS 1DKH DW
This is under my cheap digital microsoft.
Thank you
Hi All,
I have a daughter PCB from a mechanical keyboard that seems to control the light intensity of the keyboard. The marking is just 8. I need to know if this diode has polarity or not since one of the Diode is installed in different orientation than the rest.
This is the daughterboard with marking TVS6 that has different orientation, next to R19.
Thank you
Rexus Daxa M84X Ultimate Mechanical Keyboard - Mint - Linear Gateron Yellow
Second seperti baru. Barunya masih 1jt lebih
Warna mint clear
Switch Gateron Yellow Linear
Kabel hlang diganti kabel dari keyboard lain
Dongle dan Bluetooth aman
Fungsi keys dan lampu aman.
Box tersedia.
Hi all
I need to determine the type of the crystal oscillator for the following mechanical keyboard:
Model: HyperX Alloy FPS RGB HX-KB1SS2-US
MCU Model: NXP LPC11U35F 7401 SMP905.1 13 - 16 pin - LQFP64
The Crystal size is 3225.
Here are some pictures of the PCB:
I need to find out the crystal at the bottom of the MCU. IT is scraped and I cannot find out the model number.
I tried to check the datasheet of what could be attached for the MCU, but here are the things I found:
• Crystal Oscillator with an operating range of 1 MHz to 25 MHz (system oscillator).
• 12 MHz high-frequency Internal RC oscillator (IRC) that can optionally be used as a system clock.
So, based on my understanding, the internal already has Crystal of 12Mhz, but what would be the external Crystal? Maybe someone had similar keyboard that can help me get clear picture of the Crystal?
Thank you
