8850 no network - GSM-Forum

Thams · 07-13-2004, 14:56

Hi,

I've get a faulty 8850. It has Network (D and E) only shortly after switching on. Not make a telephone call possibly. Himself look for it at a manual Network search stupid and stupid. I guess the PA. I have opened it once and pressed with the finger of the PA. After that it no Network, not after switching on briefly now.

What could exactly be faulty?

Sorry, for my bad English;-)

b0ba · 07-13-2004, 16:32

Just change PA.
Possibly HAGAR. Enable netmonitor and tell us test 1 readings.

sky master · 07-13-2004, 16:48

Could be HAGAR,if signal going up 1,2,3,4 and when You calling going down 4,3,2,1 but also could be PA.Try to replace PA first

Thams · 07-13-2004, 16:51

Test1 ( changes every second ):

71 -73 xxx
0 0 x xxxx
34 34
CCCH

ambot · 07-13-2004, 17:33

Thams,

try to dial 112 then observe the xxx (TxPwr). or try to measure VCC=2.8Vdc for VCO and Vchp=4.8Vdc. or if you got RF LED put it close to antenna then using wintesla set phone in Tx Burst Mode then if RF LED light up then most likely you got a working PA and antenna switch.

07-13-2004, 14:56	#1 (permalink)
Thams Major Poster Join Date: Jun 2004 Location: Russia Posts: 48 Member: 69785 Status: Offline Thanks Meter: 3	8850 no network Hi, I've get a faulty 8850. It has Network (D and E) only shortly after switching on. Not make a telephone call possibly. Himself look for it at a manual Network search stupid and stupid. I guess the PA. I have opened it once and pressed with the finger of the PA. After that it no Network, not after switching on briefly now. What could exactly be faulty? Sorry, for my bad English;-)

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07-13-2004, 16:32	#2 (permalink)
b0ba No Life Poster Join Date: Oct 2001 Location: No route to host. Age: 44 Posts: 895 Member: 6772 Status: Offline Thanks Meter: 17	Just change PA. Possibly HAGAR. Enable netmonitor and tell us test 1 readings.

07-13-2004, 16:48	#3 (permalink)
sky master Freak Poster Join Date: Jul 2004 Age: 42 Posts: 103 Member: 72579 Status: Offline Thanks Meter: 1	Could be HAGAR,if signal going up 1,2,3,4 and when You calling going down 4,3,2,1 but also could be PA.Try to replace PA first

07-13-2004, 16:51	#4 (permalink)
Thams Major Poster Join Date: Jun 2004 Location: Russia Posts: 48 Member: 69785 Status: Offline Thanks Meter: 3	Test1 ( changes every second ): 71 -73 xxx 0 0 x xxxx 34 34 CCCH

07-13-2004, 17:33	#5 (permalink)
ambot No Life Poster Join Date: Apr 2001 Location: Philippines Posts: 535 Member: 4274 Status: Offline Thanks Meter: 18	Thams, try to dial 112 then observe the xxx (TxPwr). or try to measure VCC=2.8Vdc for VCO and Vchp=4.8Vdc. or if you got RF LED put it close to antenna then using wintesla set phone in Tx Burst Mode then if RF LED light up then most likely you got a working PA and antenna switch.