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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Nokia > Nokia Hardware & Hardware Repair


Nokia Hardware & Hardware Repair all what you need for Hardware Repairing for Nokia Phones. Before writing any thread here try to check the Frequently Asked Questions Section.

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Old 04-22-2003, 19:24   #1 (permalink)
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3310 contact service even change cobba?


Hi.
Today customer brought to me 3310 show CS. I tested with wintesla then it says cobba serial failed. I tried to change more than 10 new cobba still same. Also I changed around component near cobba,and ccont. But stll same. Now only faulty unit suspect is MAD or not?
Bye.
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Old 04-22-2003, 20:20   #2 (permalink)
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COBBAIF

Willy
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Old 04-22-2003, 21:34   #3 (permalink)
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After change Cobba need re-flash phone
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Old 04-23-2003, 01:54   #4 (permalink)
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Willy.
COBBAIF & PCM
What is this? I need service manual name?
Thanks
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Old 04-23-2003, 11:23   #5 (permalink)
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Cobbaif is communication&clocksynchron line to Mad. (cobba A7-B7-D8 pins to Mad2 A6-A7-C6). If cobbaif line is faulty, Mad2 not see cobba.
Remove cobba, and check:
Cobba A7 to J316 (CPU A7)
Cobba D8 to J317 (CpU c6)
and B7 to j315 (CPU A6)
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Old 07-20-2004, 11:20   #6 (permalink)
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where is A7 from the cobba and where is J316 from the CPU
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Old 07-20-2004, 11:48   #7 (permalink)
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@gsm salers contact service in cobba is 2 kind cobba serial and cobba paralel and you must change 10000x cobba and contact service is still alive.you must see better down cobba on the pinsthey are disconected and your job is to solder them one by one with atention and your problem will resolved
best regards keany
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Old 07-20-2004, 11:50   #8 (permalink)
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@gsm salers contact service in cobba is 2 kind cobba serial and cobba paralel and you must change 10000x cobba and contact service is still alive.you must see better down cobba on the pinsthey are disconected and your job is to solder them one by one with atention and your problem will resolved
best regards keany
this post is in 2003 what hapened with you??'
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Old 07-20-2004, 18:03   #9 (permalink)
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How to solve the cobba serial problem? i really don't understand the A7 J316 locations of the BGA IC. Please send pictures.
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Old 07-20-2004, 19:26   #10 (permalink)
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Thumbs up

Springer:
you are good explanation ,you said right
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Old 07-21-2004, 13:22   #11 (permalink)
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refull flash your phone , make sure that your cobba ic is good one , if still the same change cpu .....
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Old 07-22-2004, 17:57   #12 (permalink)
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I solve it.CPU prob
i already chage it
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Old 07-22-2004, 22:57   #13 (permalink)
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@gsmsalers
I suggest you to change flash IC and if needed write good flash.Usually when I change cobba and don't solve problem I change flash and give good result.
post result please.
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