TPLINK AC1750 V4 Serial Resistors/capacitor values


#1

I have bricked my AC1750, TFTP will not work. I want to attempt to revive it through the serial. The issue is that the RX/TX have places for resistors and a capacitor that are empty. They are labeled R24,R27,C101. Does anyone know the values of these components for this board?


#2

I'm not sure which TP-Link you have, but https://openwrt.org/toh/tp-link/archer-c5-c7-wdr7500#recovery_using_serial_connection may be helpful in how to use a ~800 Ω resistor to get the serial to behave better. (I have not tried this on a v4 device!)


#3

3


#4

Very different than the Archer C7 v2 in front of me

If I were to guess, and this is only a guess

  • C101 I would guess is for a "bypass" cap on Vdd
  • R27 looks like a pull-down to ground
  • R24 looks like a series resistor in a signal line

It looks very different from the v2 in my hands, which looks like the v2 image at that link

(The chip resistors are not readable on my device)


#5

Thank you Jeff, i may just have to do some trial and error (and get a usb microscope and hot air, i haven't been down that road yet but i guess now is the time to give it a shot).


#6

Just make a bridge in place of R24.


#7

Make a bridge in R24. I had working many serial similar tp-link router and it work without any issues.
On some model, you need connect a 10kohm 'pull-down' resistor on TX pin to ground for stability.