3100 No signal solution - GSM-Forum

irfaN_vu · 08-16-2005, 16:15

i got 3100 which has signal problem...when i on the cell there no indication bar of signal appear...when i try to manually searching in the menu...network setting but after long searching its show NO NETWORK FOUND ...i already full flash write pm....but no result...is it PA or ANT. sw problem...any guaidline.

reia · 08-16-2005, 20:23

try ant first than pa

mtmc · 08-16-2005, 20:41

hi
the pa make Tx problem,
ant. switch rx problem and not make long serach time.

ur problem is in signal ic or uem

b. r.

SPUnlock_SK · 08-17-2005, 09:32

Usually the common signal problem like that is CPU, UEM and signal processor

BUtaBUKA · 08-29-2005, 22:51

hi man!

try this:

rehot UEM, UPP, Helga/Mjolner
if not working, try to change antenna switch

regards

HUM · 01-09-2006, 02:23

just replace the three filters....100% result

banalven1 · 01-09-2006, 06:14

Quote:

Originally Posted by irfaN_vu

i got 3100 which has signal problem...when i on the cell there no indication bar of signal appear...when i try to manually searching in the menu...network setting but after long searching its show NO NETWORK FOUND ...i already full flash write pm....but no result...is it PA or ANT. sw problem...any guaidline.

just reball or change your UEM~~~~~~~~~~

baldev · 01-09-2006, 16:13

Just change small saw filters above helga/mjolner.there are 3 for three bands.change one if you want only one band.check local oscillator.

amekawy · 01-09-2006, 21:30

change 3 filters and reflaw uem and pa
chek all network tracks and voltage to pa

baldev · 01-10-2006, 03:22

change filters.there are 3 for three bands.

rajumobile · 01-10-2006, 16:37

Sometimes small tricks work fine.

Replace working antenna with your phone. OR test your PCB in another working phone.

you will get good result.

I've faces this type of problem in several 3100. Solved many of them by this solution only.

Dave.W · 01-10-2006, 19:07

Quote:

Originally Posted by baldev

change filters.there are 3 for three bands.

u tell me 3 seperate components go faulty at once? even when only one of them has any current flowing through it?

naughtycell · 01-11-2006, 01:08

Quote:

Originally Posted by Dave.W

u tell me 3 seperate components go faulty at once? even when only one of them has any current flowing through it?

All of them are still giveing advices untill now , after 4 monthes !!. didnt wait to see results !!!!

wearephones · 02-09-2006, 21:50

reflow/change flash ic

good luck

goffaman · 02-10-2006, 02:10

Quote:

Originally Posted by irfaN_vu

i got 3100 which has signal problem...when i on the cell there no indication bar of signal appear...when i try to manually searching in the menu...network setting but after long searching its show NO NETWORK FOUND ...i already full flash write pm....but no result...is it PA or ANT. sw problem...any guaidline.

what i do with it is try to re hot first the mjolner/signal processor ic or better replace it.. usually most dct4 signal processor ic are the main problem if no network found with long searching period..if it has shorter searching period then no network, its probably the VCO,. if drop signal or no access, PA or antenna switch

B.R.

08-16-2005, 16:15	#1 (permalink)
irfaN_vu No Life Poster Join Date: Mar 2005 Location: United Arab Emirates Age: 43 Posts: 1,335 Member: 130244 Status: Offline Sonork: 100.1609062 Thanks Meter: 143	3100 No signal solution i got 3100 which has signal problem...when i on the cell there no indication bar of signal appear...when i try to manually searching in the menu...network setting but after long searching its show NO NETWORK FOUND ...i already full flash write pm....but no result...is it PA or ANT. sw problem...any guaidline.

08-29-2005, 22:51	#5 (permalink)
BUtaBUKA Crazy Poster Join Date: Jun 2005 Age: 39 Posts: 53 Member: 155571 Status: Offline Thanks Meter: 2	3100 no network hi man! try this: rehot UEM, UPP, Helga/Mjolner if not working, try to change antenna switch regards

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08-16-2005, 20:23	#2 (permalink)
reia Insane Poster Join Date: Aug 2004 Location: Malang,Indonesia Age: 49 Posts: 93 Member: 78418 Status: Offline Thanks Meter: 2	try ant first than pa

08-16-2005, 20:41	#3 (permalink)
mtmc Freak Poster Join Date: Aug 2004 Location: www.Tools4Gsm.com Age: 46 Posts: 289 Member: 79725 Status: Offline Thanks Meter: 5	hi the pa make Tx problem, ant. switch rx problem and not make long serach time. ur problem is in signal ic or uem b. r.

08-17-2005, 09:32	#4 (permalink)
SPUnlock_SK No Life Poster Join Date: Jul 2002 Location: Slovakia Age: 43 Posts: 1,535 Member: 13922 Status: Offline Thanks Meter: 334	Usually the common signal problem like that is CPU, UEM and signal processor

01-09-2006, 02:23	#6 (permalink)
HUM No Life Poster Join Date: Jul 2005 Location: karachi Posts: 8,673 Member: 161728 Status: Offline Sonork: 100.1582708 Thanks Meter: 2,237	just replace the three filters....100% result

01-09-2006, 16:13	#8 (permalink)
baldev No Life Poster Join Date: Jun 2005 Location: Punjab , INDIA Posts: 1,260 Member: 153805 Status: Offline Thanks Meter: 325	Just change small saw filters above helga/mjolner.there are 3 for three bands.change one if you want only one band.check local oscillator.

01-09-2006, 21:30	#9 (permalink)
amekawy Junior Member Join Date: Oct 2005 Age: 43 Posts: 24 Member: 187930 Status: Offline Thanks Meter: 1	change 3 filters and reflaw uem and pa chek all network tracks and voltage to pa

01-10-2006, 03:22	#10 (permalink)
baldev No Life Poster Join Date: Jun 2005 Location: Punjab , INDIA Posts: 1,260 Member: 153805 Status: Offline Thanks Meter: 325	change filters.there are 3 for three bands.

01-10-2006, 16:37	#11 (permalink)
rajumobile No Life Poster Join Date: Feb 2004 Age: 52 Posts: 593 Member: 54993 Status: Offline Thanks Meter: 47	Sometimes small tricks work fine. Replace working antenna with your phone. OR test your PCB in another working phone. you will get good result. I've faces this type of problem in several 3100. Solved many of them by this solution only.

02-09-2006, 21:50	#14 (permalink)
wearephones Freak Poster Join Date: Oct 2003 Location: Bolton Age: 44 Posts: 491 Member: 41976 Status: Offline Thanks Meter: 33	reflow/change flash ic good luck