T28 no access!! - GSM-Forum

TITI · 05-07-2003, 00:25

i exchanche rm009 .resolder asic11033c and 40307/1.still no change.Any ideea?

drnele · 05-07-2003, 00:29

Try change 4cr or PA .
B.R.

Syed · 05-07-2003, 06:36

no thing just change PA RM009 ur problem will be solved

TITI · 05-07-2003, 22:46

i change 2 pa!!no luck!any ideea

05-08-2003, 01:09

External antenna connector.

drnele · 05-08-2003, 03:01

Quote:

Originally posted by TITI
i change 2 pa!!no luck!any ideea

/4CR

dannyogolo · 05-09-2003, 16:23

Hello Ericsson Hardware Experts,

After many searches here, I realised that to repair NO ACCESS / NO NETWORK on Ericsson
(I have heard even also SonyEricsson) phones, the RF PA has to be changed. OK
I have done so on 4 Ericsson phones: T20, T28e, T29s, R320, but to my surprise, they
all still show the same "NO ACCESS or NO NETWORK" !!!

The PA I used was brought in from Dubai and they were Tagged T28 PA
Numbers on it:
RM009-10P
E38666_1
0024
MEXICO
I am sure of my job, I solder them very neatly with Rework Station, this is since the
phones come on.
So now what seems to be the problem?

This is a challenge to us all !!!
Am I using a fake PA, or is it that PA is not the fault?

Every Ericsson Expert, lets face it.

Starting with you.

05-09-2003, 21:45

Of course, you can easy damage this "new"pa. . . Pa's are so bad, so, there is always chance to change it again.
But, for me, "no acces, or puk" problem is mainly related to PA or bad external antenna connector.

jboy · 05-09-2003, 21:53

Mostly it is problem with RF signal processor. Need to be changed with new one. Wouldnt help if you change from other old board.

drnele · 05-10-2003, 02:59

I agree with @legija @jboy
Both are right.
B.R.

TITI · 05-10-2003, 23:53

i \ve repair many 2628 with same NO ACCESS and most of cases i just resolder some components.very rarely i must change Rf signal processor.usual i do not think is problem with this device
the t28-2628 platform is almost the same.

drnele · 05-11-2003, 02:46

And "some components" are --?? what

gsmhuman1 · 05-12-2003, 11:13

jboy 's is only the right way

TITI · 05-12-2003, 23:58

thanx a lot!!

melyse · 05-15-2003, 14:13

chec the large condensors near the component named rop1011120/3 if any of them is less then 10kohm especialy those two in the upper side of the component than u most shurely a network problem either the power amp is short circuited or the RF mixer is damaged. good luck.

05-07-2003, 00:25	#1 (permalink)
TITI Junior Member Join Date: Aug 2001 Location: ROMANIA Posts: 27 Member: 5722 Status: Offline Thanks Meter: 0	T28 no access!! i exchanche rm009 .resolder asic11033c and 40307/1.still no change.Any ideea?

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05-07-2003, 00:29	#2 (permalink)
drnele No Life Poster Join Date: Jan 2003 Location: Bosnia and Herzegovina Posts: 793 Member: 19493 Status: Offline Sonork: 100.1596420 Thanks Meter: 185	Try change 4cr or PA . B.R.

05-07-2003, 06:36	#3 (permalink)
Syed No Life Poster Join Date: Jan 2003 Location: Hong Kong. Age: 47 Posts: 3,092 Member: 19979 Status: Offline Thanks Meter: 116	no thing just change PA RM009 ur problem will be solved

05-07-2003, 22:46	#4 (permalink)
TITI Junior Member Join Date: Aug 2001 Location: ROMANIA Posts: 27 Member: 5722 Status: Offline Thanks Meter: 0	i change 2 pa!!no luck!any ideea

05-08-2003, 01:09	#5 (permalink)
legija Guest Posts: n/a Member:	External antenna connector.

05-09-2003, 16:23	#7 (permalink)
dannyogolo No Life Poster Join Date: Nov 2002 Location: Nigeria Posts: 2,980 Member: 18200 Status: Offline Sonork: 100.1608286 Thanks Meter: 82	Hello Ericsson Hardware Experts, After many searches here, I realised that to repair NO ACCESS / NO NETWORK on Ericsson (I have heard even also SonyEricsson) phones, the RF PA has to be changed. OK I have done so on 4 Ericsson phones: T20, T28e, T29s, R320, but to my surprise, they all still show the same "NO ACCESS or NO NETWORK" !!! The PA I used was brought in from Dubai and they were Tagged T28 PA Numbers on it: RM009-10P E38666_1 0024 MEXICO I am sure of my job, I solder them very neatly with Rework Station, this is since the phones come on. So now what seems to be the problem? This is a challenge to us all !!! Am I using a fake PA, or is it that PA is not the fault? Every Ericsson Expert, lets face it. Starting with you.

05-09-2003, 21:45	#8 (permalink)
legija Guest Posts: n/a Member:	Of course, you can easy damage this "new"pa. . . Pa's are so bad, so, there is always chance to change it again. But, for me, "no acces, or puk" problem is mainly related to PA or bad external antenna connector.

05-09-2003, 21:53	#9 (permalink)
jboy Freak Poster Join Date: May 2002 Location: B&H, Australia Posts: 243 Member: 11715 Status: Offline Thanks Meter: 5	Mostly it is problem with RF signal processor. Need to be changed with new one. Wouldnt help if you change from other old board.

05-10-2003, 02:59	#10 (permalink)
drnele No Life Poster Join Date: Jan 2003 Location: Bosnia and Herzegovina Posts: 793 Member: 19493 Status: Offline Sonork: 100.1596420 Thanks Meter: 185	I agree with @legija @jboy Both are right. B.R.

05-10-2003, 23:53	#11 (permalink)
TITI Junior Member Join Date: Aug 2001 Location: ROMANIA Posts: 27 Member: 5722 Status: Offline Thanks Meter: 0	i \ve repair many 2628 with same NO ACCESS and most of cases i just resolder some components.very rarely i must change Rf signal processor.usual i do not think is problem with this device the t28-2628 platform is almost the same.

05-11-2003, 02:46	#12 (permalink)
drnele No Life Poster Join Date: Jan 2003 Location: Bosnia and Herzegovina Posts: 793 Member: 19493 Status: Offline Sonork: 100.1596420 Thanks Meter: 185	And "some components" are --?? what

05-12-2003, 11:13	#13 (permalink)
gsmhuman1 Junior Member Join Date: Feb 2002 Location: shanghai china Posts: 6 Member: 9403 Status: Offline Thanks Meter: 0	jboy 's is only the right way

05-12-2003, 23:58	#14 (permalink)
TITI Junior Member Join Date: Aug 2001 Location: ROMANIA Posts: 27 Member: 5722 Status: Offline Thanks Meter: 0	thanx a lot!!

05-15-2003, 14:13	#15 (permalink)
melyse Freak Poster Join Date: May 2003 Posts: 360 Member: 28241 Status: Offline Thanks Meter: 6	chec the large condensors near the component named rop1011120/3 if any of them is less then 10kohm especialy those two in the upper side of the component than u most shurely a network problem either the power amp is short circuited or the RF mixer is damaged. good luck.