8210 network not 100% - GSM-Forum

pipasbe · 05-01-2004, 14:26

i have a problem whith nokia 8210 have network but not 100% (2 of 3 line)
i have changed PA,antenna swish,26MHz, and vco
i have reflow CCCONT, COBBA and HAGAR
i have flashing it . with 2 different flash (5.31 and 5.25)
but this is possible to make calls
thx in davance

Engineer · 05-02-2004, 09:23

Hi
Keeping to nokia rules, in these situations, never reflow components, as its no guarentee it'll work?
Have you any probing equipment?
Probe TX IQ's with oscillscope R451 and R546 (make sure you can see 'data')
if you know what i mean, and you have no data, change the COBBA.
Thanks
Let me know

pipasbe · 05-02-2004, 11:40

Quote:

Originally Posted by Engineer

Hi
Keeping to nokia rules, in these situations, never reflow components, as its no guarentee it'll work?
Have you any probing equipment?
Probe TX IQ's with oscillscope R451 and R546 (make sure you can see 'data')
if you know what i mean, and you have no data, change the COBBA.
Thanks
Let me know

I do not have probing equipment i have a hot air station but change COBBA is verry difficult no?

[Rod] · 05-02-2004, 14:00

much difficult as to change a pa or antenna switch, the diference is that u have to clean the board first

Engineer · 05-02-2004, 15:16

take off cobba, with heat gun, air station
brade the pads on the pcb board, with soldering iron and brade, and either place the cobba back down using bga rework station, or by hand...

05-01-2004, 14:26	#1 (permalink)
pipasbe Freak Poster Join Date: Oct 2001 Posts: 304 Member: 7011 Status: Offline Thanks Meter: 0	8210 network not 100% i have a problem whith nokia 8210 have network but not 100% (2 of 3 line) i have changed PA,antenna swish,26MHz, and vco i have reflow CCCONT, COBBA and HAGAR i have flashing it . with 2 different flash (5.31 and 5.25) but this is possible to make calls thx in davance

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05-02-2004, 09:23	#2 (permalink)
Engineer Freak Poster Join Date: Nov 2003 Posts: 325 Member: 44658 Status: Offline Thanks Meter: 0	Hi Keeping to nokia rules, in these situations, never reflow components, as its no guarentee it'll work? Have you any probing equipment? Probe TX IQ's with oscillscope R451 and R546 (make sure you can see 'data') if you know what i mean, and you have no data, change the COBBA. Thanks Let me know

05-02-2004, 14:00	#4 (permalink)
[Rod] No Life Poster Join Date: Jun 2003 Location: somewhere Age: 40 Posts: 2,318 Member: 31028 Status: Offline Thanks Meter: 56	much difficult as to change a pa or antenna switch, the diference is that u have to clean the board first

05-02-2004, 15:16	#5 (permalink)
Engineer Freak Poster Join Date: Nov 2003 Posts: 325 Member: 44658 Status: Offline Thanks Meter: 0	take off cobba, with heat gun, air station brade the pads on the pcb board, with soldering iron and brade, and either place the cobba back down using bga rework station, or by hand...