Open RJ- problem... infinity team help ?

[kimocyc]

hi @ all...

i have many chinese phone without cable support... but i already have its pinout.. so i used a cable (called open rj) came with my new infinity...

first i solder the correct RX, TX and GND for both box and phone

any else step required ??

connected RX , TX and GND all done (2 addition wire not connected 1 for GND again and 1 for vcc)

when i connect to box ... and prompt to press pwr nothing happen only rx box "blue light" blinking but tx box "orange light" nothing..

" SPECIALLY.. phones has two processors.. rx_a, tx_a and rx_b, tx_b"

" ALSO.. with vodafone 225"

many ppl say replace soldering rx with tx and else... i already done.. and used a multimiter to check... all ok but problem still ??


any comment ?

[InfinityHelp]

hello!

as you described- you doing all right.
using gnx, tx, rx from open RJ45 cable soldring them to needed points.
what can be wrong.... wrong com port selected, wrong box RJ45 port used, wrong pinout used.
regarding com port problems and box connectors, switches: check FAQ section.
for wrong pinout: First of all check if your phone has GND pin on same place as in pinout you going to use for cable assembling.
if GND is on same place- second common problem is tx and rx swap. always check in both ways.

phone must boot if all mentioned above is completed

[kimocyc]

hello!

thanks ur interest in reply...

for what can be wrong..

1) wrong com.. same box prot with same setting for other phone work ok.
2) wrong box rj-45.. same box rj for other phone work ok.
3) wrong pinout.. phone has GND pin on same place but didn't accept soldering... i used another GND board.

for v-225 i used pinout described as mentioned but also failed!

repeater again... all multimetter tests is ok..

where is the problem so ??

Originally Posted by InfinityHelp

hello!

as you described- you doing all right.
using gnx, tx, rx from open RJ45 cable soldring them to needed points.
what can be wrong.... wrong com port selected, wrong box RJ45 port used, wrong pinout used.
regarding com port problems and box connectors, switches: check FAQ section.
for wrong pinout: First of all check if your phone has GND pin on same place as in pinout you going to use for cable assembling.
if GND is on same place- second common problem is tx and rx swap. always check in both ways.

phone must boot if all mentioned above is completed

[InfinityHelp]

hello!

you answered all questions by yourself.
can not be software problem, because for all others soft works good.
can not be port selection or wrong rj45- because as you mentioned- you can work with this configuration.
the only problem is still Pinout or you using wrong wires from open RJ45 wire

you can see example of right rj45 pins by position/colur here:
http://forum.gsmhosting.com/vbb/showthread.php?t=386780
this is example of spice 404 cable, but it is good to analyse and use this in other models cable assembling

[kimocyc]

hello again

sorry for nagging and thanks for help..

swear i did all mentioned correctly

but some notes:

* open rj-45 has 2 gnd wire... i connect one only pin 8 of rj
* open rj-45 has 1 wire vcc not connected to phone @ all
* GND pin in phone board didn't accept soldering.. i used any gnd board instead..

any thing else wrong ??

thanks

Originally Posted by InfinityHelp

hello!

you answered all questions by yourself.
can not be software problem, because for all others soft works good.
can not be port selection or wrong rj45- because as you mentioned- you can work with this configuration.
the only problem is still Pinout or you using wrong wires from open RJ45 wire

you can see example of right rj45 pins by position/colur here:
http://forum.gsmhosting.com/vbb/showthread.php?t=386780
this is example of spice 404 cable, but it is good to analyse and use this in other models cable assembling

[InfinityHelp]

hello!

this was all OK.
...but i would advice to check if you have real connection of phone GND with PC GND (by multimeter)

[kimocyc]

hello again...

as u said this was all ok... but as i mentioned GND pin of phone board didn't accept soldering.. so i connect GND box to another GND located in the PCB.

sometimes using mutlimeter to check with GND pin of phone buzzer ok.. and for also checking it sometimes buzzer with POWER_A pin and sometimes not ?? - is it right to buzzer with POWER_A pin ?

any comment ??

plz check the previous attach., for pins locations

waiting ur help

Originally Posted by InfinityHelp

hello!

this was all OK.
...but i would advice to check if you have real connection of phone GND with PC GND (by multimeter)

[InfinityHelp]

hello!

please measure resistance between phone GND and PC chasse with box, phone connected.
you must get near to 0 (zerro) resistance

[kimocyc]

hello again...

sorry.. what u mean ? specially i didn't have pc but i work on laptop ??

thanks ur patient!

Originally Posted by InfinityHelp

hello!

please measure resistance between phone GND and PC chasse with box, phone connected.
you must get near to 0 (zerro) resistance

[InfinityHelp]

hello!

find somewhere chasie and check if you have good connection with phone
you can do this by applying one multimeter pin to phone GND where soldering was not accepted
and another pin to Laptop chasie. Resistance must be close to 0

[kimocyc]

hello again...
So u mean i connect RX - TX and any GND board to box RJ and while phone connected to box, box must connected to laptop. then measure the pin not accepted soldering with laptop chasie ?? is it right ?

Originally Posted by InfinityHelp

hello!

find somewhere chasie and check if you have good connection with phone
you can do this by applying one multimeter pin to phone GND where soldering was not accepted
and another pin to Laptop chasie. Resistance must be close to 0

[InfinityHelp]

hello!

yes, you totaly right!

[kimocyc]

hello again....

first.. happy new year

second i did what u told conneted to box with laptop and measured GND pin board with laptop chasie buzzered ok (0 ohm) all ok

but the problem still same result ??

urgent help required

note pin called Power_b and vbat also measured with chasie,, but in previous power_a was buzzer with GND pin ?? any comment ??


thanks ur interest.

[InfinityHelp]

hello!

well, if GND is ok, now we must check if tx, rx is also OK.
connect box to pc. insert your cable and shortcut tx with rx (tx+rx)
now use any terminal program to send some data to this port. you must see echo
when you remove shortcut- echo should gone

[kimocyc]

hello again...

i connect the rj-45 with box and shorts tx and rx while using terminal prog for lg-kg 220... and press on sp-unlock button.

what happen : nothing after on screen boot.. press and hold power button nothing else

on box lights

rx blue lamp flashes

tx orange lamp flashes

when disconnect shorts tx rx only rx "blue light" flashes

what's wrong now ?