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Sony Ericsson Hardware Repair Post here your Hardware Repairing Hints or Problems with SonyEricsson and Sony Phones. |
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05-09-2003, 16:25 | #1 (permalink) |
No Life Poster Join Date: Nov 2002
Posts: 2,980
Member: 18200 Status: Offline Sonork: 100.1608286 Thanks Meter: 82 | !!! NO ACCESS / NO NETWORK: 4 PA's CHANGED, 4 FAILURES !!! After many searches here, I realised that to repair NO ACCESS / NO NETWORK on Ericsson (I have heard even also SonyEricsson) phones, the RF PA has to be changed. OK I have done so on 4 Ericsson phones: T20, T28e, T29s, R320, but to my surprise, they all still show the same "NO ACCESS or NO NETWORK" !!! The PA I used was brought in from Dubai and they were Tagged T28 PA Numbers on PA: RM009-10P E38666_1 0024 MEXICO I am sure of my job, I solder them very neatly with Rework Station, this is since the phones come on. So now what seems to be the problem? This is a challenge to us all !!! Am I using a fake PA, or is it that PA is not the fault? Every Ericsson Expert, lets face it. Starting with you. |
07-17-2004, 16:57 | #2 (permalink) |
No Life Poster Join Date: Apr 2004 Location: Skopje , Macedonia Age: 40
Posts: 916
Member: 61851 Status: Offline Sonork: 100.1604862 Thanks Meter: 117 | Did you changed the both or only the one of them.Sometimes both of them should be changed and the litle crystals by the RF,like on the T20 or T28 |
07-25-2004, 17:10 | #6 (permalink) | |
Freak Poster Join Date: May 2001 Location: Philippine/Bermuda Age: 49
Posts: 335
Member: 4691 Status: Offline Thanks Meter: 42 | Quote:
Sir, u just missed sumthing u must change also ur RF pre amps becoz when u change P.A. it will result into low sensitivity in ur RX dats why the phone can't see networks...Hope this helps u | |
07-26-2004, 11:16 | #7 (permalink) |
No Life Poster Join Date: Oct 2002
Posts: 1,126
Member: 17330 Status: Offline Thanks Meter: 15 | There is a simple GO-N0 GO test for PAs Either use a handheld Field meter or a small transceiver to check if your set is really transmitting. But in your case, like has been pointed-out, it could be your rf ic, which is a stage before your PA |
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