5210 network problem - GSM-Forum

Destructor · 02-05-2004, 00:18

after it fell from 2 meters high no signal,try to replace PA and antena switch,rehot cobba,what can I do next,some advice,i tried to find network manualy but it can't after 30 sec. of phone restarts by it self,any smart idea's

GSM Coolhawk · 02-05-2004, 01:02

@zvonimir

If the phone restarts by itself, or when you push any buttoms, first you have to look into the Flash IC, next step is the CPU which is the "Bad Wolf" on these models, since both Flash and CPU is unglued !!

I suggest you first lightly reflow the flash, upgrade it to latest version, set FAID ect, and see if it gets signal. Otherwise I would go after the CPU.

If you have instruments like Ocilliscope, Signal genrerator, wintesla ect i can give a more detailed instruction, but you can find the same in the Service Manuals step by step. Did you try to read RSSI with Wintesla ? Because this can give you a pretty good idea whats wrong with the phone if either TX or RX is broken.

Regards

02-05-2004, 00:18	#1 (permalink)
Destructor No Life Poster Join Date: Apr 2003 Location: Crazy House Age: 41 Posts: 683 Member: 27606 Status: Offline Thanks Meter: 15	5210 network problem after it fell from 2 meters high no signal,try to replace PA and antena switch,rehot cobba,what can I do next,some advice,i tried to find network manualy but it can't after 30 sec. of phone restarts by it self,any smart idea's

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02-05-2004, 01:02	#2 (permalink)
GSM Coolhawk No Life Poster Join Date: Dec 2001 Location: United Arab Emirates, Dubai Age: 52 Posts: 1,269 Member: 7751 Status: Offline Thanks Meter: 74	@zvonimir If the phone restarts by itself, or when you push any buttoms, first you have to look into the Flash IC, next step is the CPU which is the "Bad Wolf" on these models, since both Flash and CPU is unglued !! I suggest you first lightly reflow the flash, upgrade it to latest version, set FAID ect, and see if it gets signal. Otherwise I would go after the CPU. If you have instruments like Ocilliscope, Signal genrerator, wintesla ect i can give a more detailed instruction, but you can find the same in the Service Manuals step by step. Did you try to read RSSI with Wintesla ? Because this can give you a pretty good idea whats wrong with the phone if either TX or RX is broken. Regards