8210 No RX, but good TX

[XARiUS]

Hi! I've got 2 8210 that have good tx (at least i think they have), but no RX! I say it has good tx, because when i phones on, and look at the netmonitor, i see in the tx part '* 5', so, it's transmitting, and rx stays in 0! Oh, one interesting thing is that if i remove T700 (see attatchement) i get rx, but now i won't get any tx, and when turn on phone, it gets sinal, and then disapears! I've changed PA (3 times), Diplexer (2 times), HAGAR, CCONT, COBBA! Oh, also changed T700!

What can i do more? What coud be the problem? I'm really pi**ed off with those 2...

Tanks in advance
XARiUS

[Engineer]

Originally Posted by XARiUS

Hi! I've got 2 8210 that have good tx (at least i think they have), but no RX! I say it has good tx, because when i phones on, and look at the netmonitor, i see in the tx part '* 5', so, it's transmitting, and rx stays in 0! Oh, one interesting thing is that if i remove T700 (see attatchement) i get rx, but now i won't get any tx, and when turn on phone, it gets sinal, and then disapears! I've changed PA (3 times), Diplexer (2 times), HAGAR, CCONT, COBBA! Oh, also changed T700!

What can i do more? What coud be the problem? I'm really pi**ed off with those 2...

Tanks in advance
XARiUS

Hi
What program you using to tune the phone? Wintesla? Whats RSSI?
Have you probed the phone at all? RX path going into the Hagar? (using spectrum analyser)
If your still having trouble, change everything on the RX path going into Hagar.
Check Hagar voltages to see that hagar is turned on.
/ or /
probe RX IQ's with oscillosope R530..
Thanks

[hoangminhtam]

Originally Posted by XARiUS

Hi! I've got 2 8210 that have good tx (at least i think they have), but no RX! I say it has good tx, because when i phones on, and look at the netmonitor, i see in the tx part '* 5', so, it's transmitting, and rx stays in 0! Oh, one interesting thing is that if i remove T700 (see attatchement) i get rx, but now i won't get any tx, and when turn on phone, it gets sinal, and then disapears! I've changed PA (3 times), Diplexer (2 times), HAGAR, CCONT, COBBA! Oh, also changed T700!

What can i do more? What coud be the problem? I'm really pi**ed off with those 2...

Tanks in advance
XARiUS

you can not make a call that mean the tx part is failed!
so in this case you have to check tx line to see if there is signals if yes check L103 near PA n replace it ! then post the result !

[Ashwani Gaur]

First confirm your Phone Fault, its simple as follow:-
(1) Put working Sim in ur phone.
(2) Turn On Phone
(3) Goto Menu / Network Selection
(4) Choose Mannual mod

if ur PHONE finds All Available Networks in ur area, than ur SURE that Rx Path is OK.
Than if ur request for LogIn Failed it means that Tx is Faulty.

WBR
Ashwani Gaur

[amana24]

thanks for ur replay

[XARiUS]

Hi to all! Thanks to all your replies!

@Engineer
Wintesla RSSI stays near -96! Don't have a lot of material to make tests! Only have a multimeter! So i cannot probe a lot of things!

@hoangminhtam
I can't make a call! Oh, if i remove that L103, i can get network, but for a little time only! and netmonitor gives me a value for Rx, but not for TX!

@Ashwani Gaur
Nope, i can't find none network!

@all
It seems that if i take both parts (RX,TX) are functioning. As i said, i'm using just netmonitor to diagnose this! If i disconect anything from tx line i will have rx, but if i reconect, exchange, or whatever i do, i will get tx, but not rx! so i can have both in separate, but not at the same time! this is no good! lol!

Thanks in advance
XARiUS

[Ashwani Gaur]

[QUOTE=XARiUS]Hi to all! Thanks to all your replies!

@Ashwani Gaur
Nope, i can't find none network!

OK
Now first bypass Ant SW and see if u get normal RX.

if not

Change 26 Mhz Xtal

if still no RX or network than

First Reheat Hager if it works than OK if not
Change Hager

still problem same than

First Reheat Cobba if still no network Change Cobba.

WBR
Ashwani Gaur