Samsung A400 problem with connecting when call - GSM-Forum

SVH · 08-03-2003, 16:05

Antenna indicator shows some bars but when i try to call sometimes phone connects sometimes not
antenna connect is ok
phone reflasehd
i heared transmitting on audio amplifier - when phone connects normally i hear normal sound (like other phones) and transmitting tester shows me full scale, but when cant connect i hear some "pook" and tester shows very little level or nothing
anybody had similar fault?
i know i can try to change PA or other components but phone has glued chips on board and is sensitive for heating so i little afraid do more heating operations
thanx
br
p.s. can i use RM009 instead of CX773..

marple · 08-10-2003, 00:35

Your problem is easy to solve,for 2 days I will mail you,easy,chip,and most popular and safe way for this problem.This problem always hapend on SGH600,2100,A100,A400 and A300

SVH · 08-10-2003, 09:41

il very grateful for you
im waiting
br

SVH · 08-13-2003, 00:09

where is your solution?

liviu_octavian · 08-13-2003, 13:08

tested phone call without antena
and now phone works

open phone and cut contact with antena

SVH · 08-13-2003, 17:07

WHAT??!!

Elco · 08-13-2003, 18:21

Yes its thrue if phone conect without antena,cut antena conector or isolate antana from pcb.

sloba · 08-13-2003, 18:54

replace tx vco

SVH · 08-13-2003, 20:34

where it locates on schematic?
br

marple · 08-13-2003, 23:21

I send you mail but i can't send you the pictures of inside A400.Mail me please

08-03-2003, 16:05	#1 (permalink)
SVH No Life Poster Join Date: Mar 2002 Location: Europe, Lemberstadt Age: 53 Posts: 2,311 Member: 9889 Status: Offline Thanks Meter: 50	Samsung A400 problem with connecting when call Antenna indicator shows some bars but when i try to call sometimes phone connects sometimes not antenna connect is ok phone reflasehd i heared transmitting on audio amplifier - when phone connects normally i hear normal sound (like other phones) and transmitting tester shows me full scale, but when cant connect i hear some "pook" and tester shows very little level or nothing anybody had similar fault? i know i can try to change PA or other components but phone has glued chips on board and is sensitive for heating so i little afraid do more heating operations thanx br p.s. can i use RM009 instead of CX773..

08-13-2003, 20:34	#9 (permalink)
SVH No Life Poster Join Date: Mar 2002 Location: Europe, Lemberstadt Age: 53 Posts: 2,311 Member: 9889 Status: Offline Thanks Meter: 50	where it locates on schematic? br Last edited by SVH; 08-13-2003 at 21:11.

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08-10-2003, 00:35	#2 (permalink)
marple No Life Poster Join Date: Mar 2003 Location: Europe Age: 54 Posts: 788 Member: 24581 Status: Offline Thanks Meter: 87	Your problem is easy to solve,for 2 days I will mail you,easy,chip,and most popular and safe way for this problem.This problem always hapend on SGH600,2100,A100,A400 and A300

08-10-2003, 09:41	#3 (permalink)
SVH No Life Poster Join Date: Mar 2002 Location: Europe, Lemberstadt Age: 53 Posts: 2,311 Member: 9889 Status: Offline Thanks Meter: 50	il very grateful for you im waiting br

08-13-2003, 00:09	#4 (permalink)
SVH No Life Poster Join Date: Mar 2002 Location: Europe, Lemberstadt Age: 53 Posts: 2,311 Member: 9889 Status: Offline Thanks Meter: 50	where is your solution?

08-13-2003, 13:08	#5 (permalink)
liviu_octavian Junior Member Join Date: Aug 2003 Age: 44 Posts: 3 Member: 36674 Status: Offline Thanks Meter: 0	tested phone call without antena and now phone works open phone and cut contact with antena

08-13-2003, 17:07	#6 (permalink)
SVH No Life Poster Join Date: Mar 2002 Location: Europe, Lemberstadt Age: 53 Posts: 2,311 Member: 9889 Status: Offline Thanks Meter: 50	WHAT??!!

08-13-2003, 18:21	#7 (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	Yes its thrue if phone conect without antena,cut antena conector or isolate antana from pcb.

08-13-2003, 18:54	#8 (permalink)
sloba Freak Poster Join Date: Nov 1999 Location: Serbia Age: 52 Posts: 274 Member: 685 Status: Offline Thanks Meter: 23	replace tx vco

08-13-2003, 23:21	#10 (permalink)
marple No Life Poster Join Date: Mar 2003 Location: Europe Age: 54 Posts: 788 Member: 24581 Status: Offline Thanks Meter: 87	I send you mail but i can't send you the pictures of inside A400.Mail me please