nokia 8250 with high rssi - GSM-Forum

jln310 · 10-31-2003, 05:10

need some help have 2 nokia 8250 one with high rssi 144.7 already change cobba,ccont,hagar,even the cpu but still remain to high the other 8250 rssi -67 very low reading samething ill already change the above mention anyone can help me to solve this problem thank again

VELIKI · 10-31-2003, 08:40

for 144 try to change 26MHz oscilator and vco for 87 try to change R in line cobba-hagar and mesur 26MHz on cristal

baraka42 · 11-01-2003, 19:09

hi m8s,
Try to check VCO out to Hager.
B.R.

jln310 · 11-03-2003, 05:05

thanks mate but how will i measure vco out to hagar can i used tester for measurement, thanks for replying mates

b0ba · 11-04-2003, 22:45

Simplier solution:
Desolder duplexer....
Solder a wire about 7cm long to a GSM output of the duplexer or 5cm long wire to a PCN output of the duplexer.....
Tell us readings...

Regards b0ba

usernome · 01-16-2004, 04:19

What's " R in line cobba-hagar " , please ???

b0ba · 01-16-2004, 21:05

@usernome:
resistor

WBR
b0ba

Engineer · 01-16-2004, 23:26

check crystals, 26mhz and 32khz

usernome · 01-17-2004, 01:59

Thanx b0ba but I know what R means . Which R ?

10-31-2003, 05:10	#1 (permalink)
jln310 No Life Poster Join Date: Feb 2003 Location: somewhere Posts: 673 Member: 23372 Status: Offline Thanks Meter: 18	nokia 8250 with high rssi need some help have 2 nokia 8250 one with high rssi 144.7 already change cobba,ccont,hagar,even the cpu but still remain to high the other 8250 rssi -67 very low reading samething ill already change the above mention anyone can help me to solve this problem thank again

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10-31-2003, 08:40	#2 (permalink)
VELIKI No Life Poster Join Date: Nov 2002 Location: slovenia Age: 48 Posts: 589 Member: 18028 Status: Offline Thanks Meter: 20	for 144 try to change 26MHz oscilator and vco for 87 try to change R in line cobba-hagar and mesur 26MHz on cristal

11-01-2003, 19:09	#3 (permalink)
baraka42 No Life Poster Join Date: Aug 2002 Location: india Age: 63 Posts: 1,476 Member: 14578 Status: Offline Thanks Meter: 831	hi m8s, Try to check VCO out to Hager. B.R.

11-03-2003, 05:05	#4 (permalink)
jln310 No Life Poster Join Date: Feb 2003 Location: somewhere Posts: 673 Member: 23372 Status: Offline Thanks Meter: 18	thanks mate but how will i measure vco out to hagar can i used tester for measurement, thanks for replying mates

11-04-2003, 22:45	#5 (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	Simplier solution: Desolder duplexer.... Solder a wire about 7cm long to a GSM output of the duplexer or 5cm long wire to a PCN output of the duplexer..... Tell us readings... Regards b0ba

01-16-2004, 04:19	#6 (permalink)
usernome No Life Poster Join Date: Jan 2003 Location: Iassy Age: 59 Posts: 4,314 Member: 19723 Status: Offline Thanks Meter: 359	What's " R in line cobba-hagar " , please ???

01-16-2004, 21:05	#7 (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	@usernome: resistor WBR b0ba

01-16-2004, 23:26	#8 (permalink)
Engineer Freak Poster Join Date: Nov 2003 Posts: 325 Member: 44658 Status: Offline Thanks Meter: 0	check crystals, 26mhz and 32khz

01-17-2004, 01:59	#9 (permalink)
usernome No Life Poster Join Date: Jan 2003 Location: Iassy Age: 59 Posts: 4,314 Member: 19723 Status: Offline Thanks Meter: 359	Thanx b0ba but I know what R means . Which R ?