8850 big trouble - GSM-Forum

sawa · 12-11-2002, 03:12

i have an rssi reading in wintesla -77.....

changed PA,switch(duplexer|), cobba..sw..

i did not changed hagar and oscilators....

i have a signal for about 5 sec,,,,and afther that signal drops

(((

any ideaaaaaaaaaaa?????????

GsmSolution · 12-11-2002, 07:29

Hi,
Mostly your problem is PA n antenna switch.
Try to use new PA(103a or 103b) and antenna switch solder properly.
Thanks.

Bert · 12-11-2002, 09:58

Well usually it's the VCTCXO's problem you can measure it then will see

jokkergsm · 12-11-2002, 16:35

youR problem is on the tx part(rx works ok) check the continuity from PA ,Pin & Vapc to resistors (you`ll need a scheme)and gsm out
also check if it works on 1800 and post answer

mix00 · 12-11-2002, 17:28

the phone is water damaged?

sawa · 12-13-2002, 04:56

no it is nat water damaged phone.....
hmmm... in wintesla when i go to rf control...pan el..and try to make PA to run....i have an full emision...totalu continouse...

and sometime while my phone is conected on wintesla...i do not lose a signall!!!!!

12-11-2002, 03:12	#1 (permalink)
sawa Freak Poster Join Date: Oct 2001 Location: NIS Posts: 251 Member: 6781 Status: Offline Thanks Meter: 0	8850 big trouble i have an rssi reading in wintesla -77..... changed PA,switch(duplexer\|), cobba..sw.. i did not changed hagar and oscilators.... i have a signal for about 5 sec,,,,and afther that signal drops((( any ideaaaaaaaaaaa?????????

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12-11-2002, 07:29	#2 (permalink)
GsmSolution No Life Poster Join Date: Mar 2001 Location: Some where around the world. Posts: 720 Member: 3845 Status: Offline Thanks Meter: 2	Hi, Mostly your problem is PA n antenna switch. Try to use new PA(103a or 103b) and antenna switch solder properly. Thanks.

12-11-2002, 09:58	#3 (permalink)
Bert No Life Poster Join Date: Oct 1999 Location: Hong Kong Posts: 1,509 Member: 596 Status: Offline Sonork: 100.33096 Thanks Meter: 514	Well usually it's the VCTCXO's problem you can measure it then will see

12-11-2002, 16:35	#4 (permalink)
jokkergsm No Life Poster Join Date: Jan 2002 Location: freak land Age: 44 Posts: 699 Member: 8866 Status: Offline Thanks Meter: 50	youR problem is on the tx part(rx works ok) check the continuity from PA ,Pin & Vapc to resistors (you`ll need a scheme)and gsm out also check if it works on 1800 and post answer

12-11-2002, 17:28	#5 (permalink)
mix00 Freak Poster Join Date: May 2002 Location: greece Posts: 181 Member: 12417 Status: Offline Thanks Meter: 0	the phone is water damaged?

12-13-2002, 04:56	#6 (permalink)
sawa Freak Poster Join Date: Oct 2001 Location: NIS Posts: 251 Member: 6781 Status: Offline Thanks Meter: 0	no it is nat water damaged phone..... hmmm... in wintesla when i go to rf control...pan el..and try to make PA to run....i have an full emision...totalu continouse... and sometime while my phone is conected on wintesla...i do not lose a signall!!!!!