COBBA serial Faild - GSM-Forum

hanoon · 01-27-2002, 07:38

COBBA serial faild ,,,this was the result from wintesla self test.....what to do ...? phone was working very well but loosing network sometimes but contact service happen after rehot BGA parts........ i need to overcome contact service please help!!!

ranger · 01-27-2002, 08:37

hello i think its a hard ware problem ..i was dont many phones like that try to resold the cobba IC by heating it ..its a bad contact for its pins ..as i think

tell me about the resalt . best regard

rengo

Hanukkah · 01-27-2002, 09:40

Use good flux and reflow COBBA IC. If wintesla still reports cobba serial failed.. you'll have to reball COBBA IC using BGA Tool Kit. goodluck

Sonia · 01-28-2002, 02:54

Ye, it's a hardware problem. Be carefull rehoting COBBA - some balls connects and the one way of solving this prob is reballing COBBA IC using BGA Tool (no other ways). Sorry...

Don't worry... Be happy...

hanoon · 01-28-2002, 06:42

thanks for help... i have liquid flux and gel flux and hot air station and i used both before for simillar problems but i have dead phones......so what to use? and how hot must be hot air for rehot?

01-27-2002, 07:38	#1 (permalink)
hanoon No Life Poster Join Date: Dec 2001 Location: USA Age: 45 Posts: 596 Member: 8051 Status: Offline Thanks Meter: 6	COBBA serial Faild COBBA serial faild ,,,this was the result from wintesla self test.....what to do ...?<br />phone was working very well but loosing network sometimes but contact service happen after rehot BGA parts........<br />i need to overcome contact service please help!!!

01-27-2002, 08:37	#2 (permalink)
ranger Freak Poster Join Date: Feb 2001 Location: ...... Age: 51 Posts: 402 Member: 3477 Status: Offline Thanks Meter: 3	hello <br />i think its a hard ware problem ..i was dont many phones like that <br />try to resold the cobba IC by heating it ..its a bad contact for its pins ..as i think tell me about the resalt .<br />best regard rengo

01-28-2002, 06:42	#5 (permalink)
hanoon No Life Poster Join Date: Dec 2001 Location: USA Age: 45 Posts: 596 Member: 8051 Status: Offline Thanks Meter: 6	thanks for help...<br />i have liquid flux and gel flux and hot air station and i used both before for simillar problems but i have dead phones......so what to use?<br />and how hot must be hot air for rehot?

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01-27-2002, 09:40	#3 (permalink)
Hanukkah No Life Poster Join Date: Jul 2001 Location: RP Age: 48 Posts: 890 Member: 5246 Status: Offline Thanks Meter: 9	Use good flux and reflow COBBA IC. If wintesla still reports cobba serial failed.. you'll have to reball COBBA IC using BGA Tool Kit. goodluck

01-28-2002, 02:54	#4 (permalink)
Sonia Freak Poster Join Date: Jan 2002 Location: Ukraine Age: 48 Posts: 348 Member: 8779 Status: Offline Thanks Meter: 1	Ye, it's a hardware problem. Be carefull rehoting COBBA - some balls connects and the one way of solving this prob is reballing COBBA IC using BGA Tool (no other ways). Sorry... Don't worry... Be happy...