A Trick For Nokia - GSM-Forum

mandu · 10-30-2002, 20:35

HAI, I TRY AN EXIPIREMENT IN NOKIA PHONES THAT IS ,I REMOVED ANTENNA SWITCH AND SHORT TX&RX&ANTENNA CONNECTIONS . PHONE REGISTERING NETWORK AND WORKING GOOD . BUT PHONE WORK IN SINGLE BAND .......... dear friends some members send me mail to ask me about this trick Some one write this will distroy phone ,oters ? where is first pin .First i tell you this connection make no trebbles in your phones if such trebble occours please send your replaies to me . This is the connection for antenna switch first pin is earth (down) total 16 pin switch .900mhz transmissoin short 6&12&16 connection .For 1800mhz band short 2&5&12 connection This methode onely work in nokia phones

sm@sh · 10-31-2002, 02:30

Sorry for some stupid question, but how to count RX/TX/ANT legs on diplexor (ant.switch)? Where is the first leg?

willy · 10-31-2002, 06:33

Mandu

MIX TX with RX with ANT, i do not thing this is correct way to make phone work!

think, about TX power will go back to RX ......

Willy

Quote:

Originally posted by mandu
HAI, I TRY AN EXIPIREMENT IN NOKIA PHONES THAT IS ,I REMOVED ANTENNA SWITCH AND SHORT TX&RX&ANTENNA CONNECTIONS . PHONE REGISTERING NETWORK AND WORKING GOOD . BUT PHONE WORK IN SINGLE BAND . I TRIED IT BECAUSE I WANT TO CHECK ANTENNA SWITCH IS WORKING ,REALY IT WAS A SUCESS . TRY IT IF ANY PROBLEM SEND ME MAIL

alucard · 10-31-2002, 20:59

hi, i think what you are trying to do is destroying the phone nokia would not put the antena switch there if it has no purpose,

paygee · 10-31-2002, 21:24

i think a double diode will work for ant switch , as it is seen in alcatel be4.

KKK · 11-04-2002, 21:38

yes it works

mimmy228 · 11-07-2002, 04:13

Quote:

Originally posted by mandu
HAI, I TRY AN EXIPIREMENT IN NOKIA PHONES THAT IS ,I REMOVED ANTENNA SWITCH AND SHORT TX&RX&ANTENNA CONNECTIONS . PHONE REGISTERING NETWORK AND WORKING GOOD . BUT PHONE WORK IN SINGLE BAND .......... dear friends some members send me mail to ask me about this trick Some one write this will distroy phone ,oters ? where is first pin .First i tell you this connection make no trebbles in your phones if such trebble occours please send your replaies to me . This is the connection for antenna switch first pin is earth (down) total 16 pin switch .900mhz transmissoin short 6&12&16 connection .For 1800mhz band short 2&5&12 connection This methode onely work in nokia phones

Hi,Mandu

Where is exactly pin 2,5&12 for 1800mhz,
pls give us the layout
TQ

kazak · 11-21-2002, 04:42

it work
I connected Pin 16 to 12 ( GSM in to Antenna Out) , because I was not sure about the pin Numbering , But I think it's like that :
-Pin 16 go to PF8109 GSM Out ( pin 6)
-Pin 12 of diplex Goto antenna
-Pin 6 ( RX ? )

So refering to pin 16 , and by reverse counting , you'll get others
pin. Of course counting is same for any 16 Pin IC.
I didn't use pin 6.
I made mesurement on 4 phones (3310) but in 2 phone, I saw a ground shorted to Pin 16 of diplex , So I isolated the diplex input from the PA , then Made a Jump from the PA to Pin 12 of diplexer , I got Network & phone is working.
I'm in a 900 net , don't know about 1800
I know that this is not a famous way to repair a Nokia 3310 network , but it can help people who don't have acces to Hot air tools , Mini Lab, Oscillo & so on. It seem to be better than leting dozen of phones with no net.
Now if somebody can explain why it work , and how to test the diplexer offline with just a Multimeter , because I think this solution work on phone who have diplexer faulty. It will not work if the Pa or if the firmware is not good.
I'm interrested by a Block diagram of Nokia 3310 RF system ( TX & RF Path).
Thanks

10-30-2002, 20:35	#1 (permalink)
mandu Freak Poster Join Date: Oct 2002 Location: INDIA Posts: 292 Member: 17243 Status: Offline Thanks Meter: 13	A Trick For Nokia HAI, I TRY AN EXIPIREMENT IN NOKIA PHONES THAT IS ,I REMOVED ANTENNA SWITCH AND SHORT TX&RX&ANTENNA CONNECTIONS . PHONE REGISTERING NETWORK AND WORKING GOOD . BUT PHONE WORK IN SINGLE BAND .......... dear friends some members send me mail to ask me about this trick Some one write this will distroy phone ,oters ? where is first pin .First i tell you this connection make no trebbles in your phones if such trebble occours please send your replaies to me . This is the connection for antenna switch first pin is earth (down) total 16 pin switch .900mhz transmissoin short 6&12&16 connection .For 1800mhz band short 2&5&12 connection This methode onely work in nokia phones Last edited by mandu; 11-01-2002 at 19:11.

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10-31-2002, 02:30	#2 (permalink)
sm@sh Freak Poster Join Date: Apr 2002 Location: PL/UA Posts: 140 Member: 10833 Status: Offline Thanks Meter: 5	Sorry for some stupid question, but how to count RX/TX/ANT legs on diplexor (ant.switch)? Where is the first leg?

10-31-2002, 20:59	#4 (permalink)
alucard Junior Member Join Date: Sep 2002 Location: in the middle of the ocean Age: 47 Posts: 9 Member: 16090 Status: Offline Thanks Meter: 0	hi, i think what you are trying to do is destroying the phone nokia would not put the antena switch there if it has no purpose,

10-31-2002, 21:24	#5 (permalink)
paygee No Life Poster Join Date: May 2002 Location: asia Age: 54 Posts: 711 Member: 11742 Status: Offline Thanks Meter: 1	i think a double diode will work for ant switch , as it is seen in alcatel be4.

11-04-2002, 21:38	#6 (permalink)
KKK Freak Poster Join Date: Dec 1999 Location: Bulgaria Posts: 111 Member: 838 Status: Offline Thanks Meter: 0	yes it works

11-21-2002, 04:42	#8 (permalink)
kazak Freak Poster Join Date: Dec 2001 Location: Burkina Faso Posts: 268 Member: 7843 Status: Offline Thanks Meter: 1	it work I connected Pin 16 to 12 ( GSM in to Antenna Out) , because I was not sure about the pin Numbering , But I think it's like that : -Pin 16 go to PF8109 GSM Out ( pin 6) -Pin 12 of diplex Goto antenna -Pin 6 ( RX ? ) So refering to pin 16 , and by reverse counting , you'll get others pin. Of course counting is same for any 16 Pin IC. I didn't use pin 6. I made mesurement on 4 phones (3310) but in 2 phone, I saw a ground shorted to Pin 16 of diplex , So I isolated the diplex input from the PA , then Made a Jump from the PA to Pin 12 of diplexer , I got Network & phone is working. I'm in a 900 net , don't know about 1800 I know that this is not a famous way to repair a Nokia 3310 network , but it can help people who don't have acces to Hot air tools , Mini Lab, Oscillo & so on. It seem to be better than leting dozen of phones with no net. Now if somebody can explain why it work , and how to test the diplexer offline with just a Multimeter , because I think this solution work on phone who have diplexer faulty. It will not work if the Pa or if the firmware is not good. I'm interrested by a Block diagram of Nokia 3310 RF system ( TX & RF Path). Thanks