3410 signal loose after 5 sec. - GSM-Forum

chrisro · 11-29-2003, 15:40

Hi!
I have dropped 3410. Phone register in network and after 5 second loose network. It is the same in 900 and 1800 MHz. I have changed PA but problem still the same.
thanks for reply.

Elco · 11-29-2003, 18:09

Check Antena swich & resolder cobba

kovacn2 · 11-29-2003, 19:10

Change hagar and pf in the same time.Post result!!!!!!

Bohosh · 11-29-2003, 22:12

Try with change hagar and cobba

Medz · 11-30-2003, 12:44

OK..

Droped means a brocken thing.., for differential diagnoses
1- If the phone feels the available networks , that means that the
rx section did not affectes.--> So we have to check Power-Ampl.,
Ant-Switch, and maybe cobba brocken balls.
2- If the phone doesn't feel the networks , that means Incomeing
Rx path---> Check Ant-pad could be brocken, Ant-Sw. could have
a brocken pins at the base of it, filter crystals, and also maybe a
brocken balls nder Hagar.

celtec · 12-02-2003, 09:25

If after lost Signal U haven't beep when U push key, maybe would be FAID.
Try to update FAID or rewrite IMEI and then update FAID.

BR
Alex

MrHazeem · 12-05-2003, 07:28

Check supply voltage to PA ...!!!

-------------------
MrHazeem

Saulyss · 12-05-2003, 07:36

Check duplexer ....

hakima · 12-06-2003, 07:01

In this case pls check Voltage out of Power IC!!!!!!!!!!!

Jani-Jan · 12-06-2003, 21:51

and dont forget to replace rtc crystal
it is so importent.....

Hanukkah · 12-07-2003, 06:11

Use Wintesla and Go to RF controls and try to let your phone transmit at power level 5. If you put flashing keychain and it starts to blink then TX is ok.

Tx ok means your PA is working. If your PA is new, then you would have to check power line to PA from Bat +. Might be line cut (water damaged)

If lines are ok then your PA might not be working.

chrisro · 12-07-2003, 11:28

I changed: CCONT, HAGAR, COBBA and RTC. Still the same problem. I'm sick and tired 'cause of it.
Please tell me on which pin is +vbat on PA.

Medz · 12-07-2003, 11:33

The 2 mid pins ( of the for) , faceing the ant-switch.

Civ_com · 12-07-2003, 14:46

try to change the cystal ic...~

chrisro · 12-07-2003, 16:56

The voltage is good for PA.
Which crystal ic change?

11-29-2003, 15:40	#1 (permalink)
chrisro Freak Poster Join Date: Aug 2001 Location: Gdynia, Poland Age: 46 Posts: 258 Member: 6060 Status: Offline Thanks Meter: 0	3410 signal loose after 5 sec. Hi! I have dropped 3410. Phone register in network and after 5 second loose network. It is the same in 900 and 1800 MHz. I have changed PA but problem still the same. thanks for reply.

12-05-2003, 07:36	#8 (permalink)
Saulyss Freak Poster Join Date: Oct 2001 Location: Lithuania Posts: 326 Member: 6744 Status: Offline Thanks Meter: 0	:) Check duplexer ....

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11-29-2003, 18:09	#2 (permalink)
Elco No Life Poster Join Date: Dec 2002 Location: Romania Posts: 10,018 Member: 19254 Status: Offline Sonork: 100.72990 Thanks Meter: 25,395	Check Antena swich & resolder cobba

11-29-2003, 19:10	#3 (permalink)
kovacn2 Banned Join Date: Oct 2003 Location: Zemun,Serbia Age: 40 Posts: 89 Member: 41186 Status: Offline Thanks Meter: 0	Change hagar and pf in the same time.Post result!!!!!!

11-29-2003, 22:12	#4 (permalink)
Bohosh No Life Poster Join Date: Aug 2002 Posts: 1,948 Member: 14741 Status: Offline Thanks Meter: 119	Try with change hagar and cobba

11-30-2003, 12:44	#5 (permalink)
Medz No Life Poster Join Date: Sep 2003 Age: 66 Posts: 807 Member: 39601 Status: Offline Thanks Meter: 13	OK.. Droped means a brocken thing.., for differential diagnoses 1- If the phone feels the available networks , that means that the rx section did not affectes.--> So we have to check Power-Ampl., Ant-Switch, and maybe cobba brocken balls. 2- If the phone doesn't feel the networks , that means Incomeing Rx path---> Check Ant-pad could be brocken, Ant-Sw. could have a brocken pins at the base of it, filter crystals, and also maybe a brocken balls nder Hagar.

12-02-2003, 09:25	#6 (permalink)
celtec Freak Poster Join Date: Mar 2003 Location: Rome Italy Posts: 188 Member: 25504 Status: Offline Thanks Meter: 0	If after lost Signal U haven't beep when U push key, maybe would be FAID. Try to update FAID or rewrite IMEI and then update FAID. BR Alex

12-05-2003, 07:28	#7 (permalink)
MrHazeem Freak Poster Join Date: Jul 2002 Location: MAD Age: 50 Posts: 483 Member: 13545 Status: Offline Thanks Meter: 2	Check supply voltage to PA ...!!! ------------------- MrHazeem

12-06-2003, 07:01	#9 (permalink)
hakima No Life Poster Join Date: Jul 2003 Posts: 2,895 Member: 33804 Status: Offline Thanks Meter: 22	In this case pls check Voltage out of Power IC!!!!!!!!!!!

12-06-2003, 21:51	#10 (permalink)
Jani-Jan No Life Poster Join Date: Jan 2003 Location: GMT +5 Age: 49 Posts: 1,230 Member: 19737 Status: Offline Thanks Meter: 133	and dont forget to replace rtc crystal it is so importent.....

12-07-2003, 06:11	#11 (permalink)
Hanukkah No Life Poster Join Date: Jul 2001 Location: RP Age: 48 Posts: 890 Member: 5246 Status: Offline Thanks Meter: 9	Use Wintesla and Go to RF controls and try to let your phone transmit at power level 5. If you put flashing keychain and it starts to blink then TX is ok. Tx ok means your PA is working. If your PA is new, then you would have to check power line to PA from Bat +. Might be line cut (water damaged) If lines are ok then your PA might not be working.

12-07-2003, 11:28	#12 (permalink)
chrisro Freak Poster Join Date: Aug 2001 Location: Gdynia, Poland Age: 46 Posts: 258 Member: 6060 Status: Offline Thanks Meter: 0	I changed: CCONT, HAGAR, COBBA and RTC. Still the same problem. I'm sick and tired 'cause of it. Please tell me on which pin is +vbat on PA.

12-07-2003, 11:33	#13 (permalink)
Medz No Life Poster Join Date: Sep 2003 Age: 66 Posts: 807 Member: 39601 Status: Offline Thanks Meter: 13	The 2 mid pins ( of the for) , faceing the ant-switch.

12-07-2003, 14:46	#14 (permalink)
Civ_com Junior Member Join Date: Nov 2003 Location: kuala lumpur malaysia Posts: 26 Member: 44142 Status: Offline Thanks Meter: 0	try to change the cystal ic...~

12-07-2003, 16:56	#15 (permalink)
chrisro Freak Poster Join Date: Aug 2001 Location: Gdynia, Poland Age: 46 Posts: 258 Member: 6060 Status: Offline Thanks Meter: 0	The voltage is good for PA. Which crystal ic change?