Plz infinity team help - GSM-Forum

lucky_gsm · 11-03-2009, 08:58

before 5 months ago, I posted my problem but not solved
http://forum.gsmhosting.com/vbb/showthread.php?t=781621

after several tries, and research on this strange problem, I think I got an important result.
it is better explained on the image.

What's a wrong plz?

InfinityHelp · 11-03-2009, 20:21

hello!

probably your main infinity box has some errors on PCB.
(some components missing or else)
try to set pull_up resistors on tx & rx and check again

lucky_gsm · 11-04-2009, 09:14

Quote:

Originally Posted by InfinityHelp

hello!

probably your main infinity box has some errors on PCB.
(some components missing or else)
try to set pull_up resistors on tx & rx and check again

There isn't componets missing, but i can check the boxs voltage at RX and RX, is 5V at Tx and 5.5 at Rx, if it can help.

lucky_gsm · 11-04-2009, 16:03

Quote:

Originally Posted by InfinityHelp

hello!

probably your main infinity box has some errors on PCB.
(some components missing or else)
try to set pull_up resistors on tx & rx and check again

I found 3resistors with those values , i changed R12 but same problem, R1 and R7 are Ok, 47Kohms and 10Kohms.
This is a pcb pictures, plz help

InfinityHelp · 11-04-2009, 21:23

hello!

you dont have to change anything.
just add "pull_up" resistors to tx and rx pins.
one resistor side solder to +5v, another to Tx
another resistor solder one side to +5v andother to Rx

this will pull up signal and might be box will more clear see signals.
value of resistor you can find in tests

lucky_gsm · 11-05-2009, 17:03

Quote:

Originally Posted by InfinityHelp

hello!

you dont have to change anything.
just add "pull_up" resistors to tx and rx pins.
one resistor side solder to +5v, another to Tx
another resistor solder one side to +5v andother to Rx

this will pull up signal and might be box will more clear see signals.
value of resistor you can find in tests

problem solved thank you very much sir.
Infinity team is the best

InfinityHelp · 11-05-2009, 20:47

hello!

what resistor value worked for you? ussually 4,7-10kohm

lucky_gsm · 11-07-2009, 18:08

I maked just one resistor=36 kohms at TX because voltage at RX is good=5V
and with this the TX < 5V but work good, Now it detects all phones supported.

algerienbox · 11-07-2009, 18:19

lucky gsm

good job ....................

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11-03-2009, 20:21	#2 (permalink)
InfinityHelp Product Supporter Join Date: May 2005 Location: uae Posts: 29,245 Member: 148515 Status: Offline Thanks Meter: 19,534	hello! probably your main infinity box has some errors on PCB. (some components missing or else) try to set pull_up resistors on tx & rx and check again

11-04-2009, 21:23	#5 (permalink)
InfinityHelp Product Supporter Join Date: May 2005 Location: uae Posts: 29,245 Member: 148515 Status: Offline Thanks Meter: 19,534	hello! you dont have to change anything. just add "pull_up" resistors to tx and rx pins. one resistor side solder to +5v, another to Tx another resistor solder one side to +5v andother to Rx this will pull up signal and might be box will more clear see signals. value of resistor you can find in tests

11-05-2009, 20:47	#7 (permalink)
InfinityHelp Product Supporter Join Date: May 2005 Location: uae Posts: 29,245 Member: 148515 Status: Offline Thanks Meter: 19,534	hello! what resistor value worked for you? ussually 4,7-10kohm

11-07-2009, 18:19	#9 (permalink)
algerienbox No Life Poster Join Date: Sep 2007 Location: algeria Posts: 2,360 Member: 591880 Status: Offline Thanks Meter: 561	lucky gsm good job ....................