3310 COBBA problem - GSM-Forum

Deppe92 · 04-27-2002, 22:19

I've got a 3310 with no network.
It have the following symptoms:

- Absolutly no network
- if I heat the COBBA with hot air ****er (the parts around of cause also) and reassemble the phone while the PCB is heated the phone works great for max. 5 minutes (I can make a call an so on)
- when there is no network the sound of the speaker is quiet and the keytones sounds distorted
- I think there is trouble with Vcobba or other connections to COBBA
- Vcobba from CCONT is OK

Is this a 100% COBBA fault or maybe some parts around or the PCB are bad?

Anyone had the same problem?

remle · 04-28-2002, 23:58

Hi,

You should measure 1.5V on the Vref . Check for leaky capacitors if not 1.5v. i'm not sure of the part number, i have to check.

Best Regards

s4sajii · 06-08-2003, 11:53

i have the same prob.. of sound in the speakere... i have replace the cobba too but still same situation.....anohter thing...that network signals are not remian stable... up and down,..
br.

Dj King · 06-25-2003, 23:25

Replace C508. Thats all!

04-27-2002, 22:19	#1 (permalink)
Deppe92 Insane Poster Join Date: Mar 2002 Age: 44 Posts: 71 Member: 10127 Status: Offline Thanks Meter: 1	3310 COBBA problem I've got a 3310 with no network. It have the following symptoms: - Absolutly no network - if I heat the COBBA with hot air ****er (the parts around of cause also) and reassemble the phone while the PCB is heated the phone works great for max. 5 minutes (I can make a call an so on) - when there is no network the sound of the speaker is quiet and the keytones sounds distorted - I think there is trouble with Vcobba or other connections to COBBA - Vcobba from CCONT is OK Is this a 100% COBBA fault or maybe some parts around or the PCB are bad? Anyone had the same problem?

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04-28-2002, 23:58	#2 (permalink)
remle Freak Poster Join Date: Nov 1999 Posts: 99 Member: 683 Status: Offline Thanks Meter: 0	Hi, You should measure 1.5V on the Vref . Check for leaky capacitors if not 1.5v. i'm not sure of the part number, i have to check. Best Regards

06-08-2003, 11:53	#3 (permalink)
s4sajii Banned Join Date: Oct 2001 Location: JMB Age: 49 Posts: 1,226 Member: 6919 Status: Offline Thanks Meter: 12	i have the same prob.. of sound in the speakere... i have replace the cobba too but still same situation.....anohter thing...that network signals are not remian stable... up and down,.. br.

06-25-2003, 23:25	#4 (permalink)
Dj King Freak Poster Join Date: Sep 2001 Location: Galaxy far far away! Posts: 397 Member: 6428 Status: Offline Thanks Meter: 43	Replace C508. Thats all!