ericsson t20 no acces - GSM-Forum

wissem · 10-31-2002, 22:03

one of my telephone ericssont20s display no acces i cant send or receive what is the problem please

jero · 10-31-2002, 22:30

hi

first,check ext.antenna, antenna switch,then pa finally two bga chips.
if your problem remains after changing ant.switch and pa,you should reball the both of BGA chips(dsp)which are below CPU.one by one..hope you succes..__jero__

sat · 11-01-2002, 19:57

mostly that's becouse of signal ic. on the right side of CPU.

11-01-2002, 21:31

No ACCESS mean you have RX but no TX - so you need to check TX line - Antenna, antenna connector, PA and power IC. But it's probably PA problem.

dannyogolo · 03-13-2003, 17:23

Pls Can any1 tell me the equipt for soldering or desoldering or reballing this IC, TX, RX BGA, etc

sayhu · 03-15-2003, 18:17

Rewrite e2 then open cover.

Fre3 Crack3r · 03-15-2003, 20:24

10-31-2002, 22:03	#1 (permalink)
wissem Major Poster Join Date: Oct 2002 Location: hightechsquareteam Age: 52 Posts: 45 Member: 16351 Status: Offline Thanks Meter: 0	ericsson t20 no acces one of my telephone ericssont20s display no acces i cant send or receive what is the problem please

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10-31-2002, 22:30	#2 (permalink)
jero Freak Poster Join Date: Aug 2002 Location: __inside__ Age: 41 Posts: 102 Member: 14792 Status: Offline Thanks Meter: 1	hi first,check ext.antenna, antenna switch,then pa finally two bga chips. if your problem remains after changing ant.switch and pa,you should reball the both of BGA chips(dsp)which are below CPU.one by one..hope you succes..__jero__

11-01-2002, 19:57	#3 (permalink)
sat Freak Poster Join Date: Aug 2001 Location: GSMLAND Posts: 479 Member: 5764 Status: Offline Thanks Meter: 2	mostly that's becouse of signal ic. on the right side of CPU.

11-01-2002, 21:31	#4 (permalink)
legija Guest Posts: n/a Member:	No ACCESS mean you have RX but no TX - so you need to check TX line - Antenna, antenna connector, PA and power IC. But it's probably PA problem.

03-13-2003, 17:23	#5 (permalink)
dannyogolo No Life Poster Join Date: Nov 2002 Location: Nigeria Posts: 2,980 Member: 18200 Status: Offline Sonork: 100.1608286 Thanks Meter: 82	Pls Can any1 tell me the equipt for soldering or desoldering or reballing this IC, TX, RX BGA, etc

03-15-2003, 18:17	#6 (permalink)
sayhu Freak Poster Join Date: Feb 2002 Location: Turkey Posts: 212 Member: 9355 Status: Offline Thanks Meter: 113	Rewrite e2 then open cover.

03-15-2003, 20:24	#7 (permalink)
Fre3 Crack3r Banned Join Date: Jan 2002 Location: Morocco , Tetouan Posts: 1,752 Member: 8784 Status: Offline Sonork: 100.63512 Thanks Meter: 31