how to detect correct pin out of china phone ways

[You must be registered and logged in to see this link.]


step by step

kahit anong board ng chinaphone basta mtk chip

first step is to find what is rx and tx pin out

sa ibang board may nakaindicate

vbatt

ground

pero

rx at tx sa iba walang nakalagay


on my own procedure set ko sa X10 ang tester

ang red test prod positive nilalagay ko sa ground

at ang black test prod nilalagay ko sa bawat isang pin out hanggang masukat lahat

ang rx tx halos magkalapit na ang sukat



rj 45 has 3 wire

one for ground

two for rx and tx baligtaran samahan mo ng rps 3.8 volts