8250 network - GSM-Forum

webberlink · 04-07-2003, 09:44

I have Nk8250 that has full network signal working for 2-3 days then it drop to zero, phone is warn when you touch it. After switch of for few hours. The network come back full bars and it is working ok again for a few days. Some times network bars is full but cannot dial out too, and if someone call in, he cannot hear my voice sometimes. When do network searching, it can find network most of the time. Sometimes when select network manually it gives "No access" but most of the time, no problem.

I heat up CCONT, COBRA, changes 2 transistor -1mt which connected between CCONT and COBRA. The phone works perfectly for a few days and problems come back.

Any idea, thanks.

johny3310 · 04-08-2003, 00:16

First check your PA, then FDK chip, and try to change COBBA.

webberlink · 04-08-2003, 07:37

Sorry, I am very new here. How to check whether PA is ok or not?

supremegsm · 04-08-2003, 08:34

You can only check by changing the PA.

webberlink · 04-08-2003, 10:40

Thank you. I will do it.

johny3310 · 04-08-2003, 12:09

Quote:

Originally posted by supremegsm
You can only check by changing the PA.

Of course. Check PA = Change PA. It is the easyest way!

04-07-2003, 09:44	#1 (permalink)
webberlink Junior Member Join Date: Mar 2003 Posts: 9 Member: 24449 Status: Offline Thanks Meter: 0	8250 network, please help @Willy. I have Nk8250 that has full network signal working for 2-3 days then it drop to zero, phone is warn when you touch it. After switch of for few hours. The network come back full bars and it is working ok again for a few days. Some times network bars is full but cannot dial out too, and if someone call in, he cannot hear my voice sometimes. When do network searching, it can find network most of the time. Sometimes when select network manually it gives "No access" but most of the time, no problem. I heat up CCONT, COBRA, changes 2 transistor -1mt which connected between CCONT and COBRA. The phone works perfectly for a few days and problems come back. Any idea, thanks. Last edited by webberlink; 04-07-2003 at 11:32.

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04-08-2003, 00:16	#2 (permalink)
johny3310 Freak Poster Join Date: Jul 2002 Location: Croatia Age: 49 Posts: 499 Member: 14004 Status: Offline Thanks Meter: 6	First check your PA, then FDK chip, and try to change COBBA.

04-08-2003, 07:37	#3 (permalink)
webberlink Junior Member Join Date: Mar 2003 Posts: 9 Member: 24449 Status: Offline Thanks Meter: 0	Sorry, I am very new here. How to check whether PA is ok or not?

04-08-2003, 08:34	#4 (permalink)
supremegsm Freak Poster Join Date: Apr 2003 Age: 47 Posts: 340 Member: 25763 Status: Offline Thanks Meter: 18	You can only check by changing the PA.

04-08-2003, 10:40	#5 (permalink)
webberlink Junior Member Join Date: Mar 2003 Posts: 9 Member: 24449 Status: Offline Thanks Meter: 0	Thank you. I will do it.