Nokia 8890 Dead. Please Help!!!!!!! - GSM-Forum

jonnywhit · 09-24-2002, 12:42

Hi, i have an 8890 that has been water damaged. there is no rust on the pcb though as was small amount of liquid. it is now dead. i have cleaned it using toothbrush and isoclene and now the pcb is looking new. i try to read by rolis and it says phone ram bad and check mobile choice, what can i do or check?? i have basic soldering experenice and have a multi meter for checking circuits. please get back soon people.
regards
Jonathan

willy · 09-24-2002, 17:39

Jonathan

RAM bad, might becasue CCONT not support to RAM ,check at C131 and V116 VSRM ! or inside MAD is rusty !

try to check first 32.768 work or not, and then check 26Mhz to hager, and from hager to MAD !

Willy

jonnywhit · 09-24-2002, 17:53

dont know how to check that mate? im a newbie. i got a mulit meter for testing circuits and stuff. i dont have a pic of pcb with descriptions of individual components either.
regards
Jonathan

willy · 09-24-2002, 18:05

Jonathan

is it your multi meter can check 26Mhz /13 Mhz TCXO ?

you can try this , put 10Kohm resistor to BSI to GND, and give B+ to GND have 4V , then you can make it work without casing !

Willy

09-24-2002, 12:42	#1 (permalink)
jonnywhit Freak Poster Join Date: Mar 2002 Location: uk Age: 39 Posts: 323 Member: 10559 Status: Offline Thanks Meter: 13	Nokia 8890 Dead. Please Help!!!!!!! Hi, i have an 8890 that has been water damaged. there is no rust on the pcb though as was small amount of liquid. it is now dead. i have cleaned it using toothbrush and isoclene and now the pcb is looking new. i try to read by rolis and it says phone ram bad and check mobile choice, what can i do or check?? i have basic soldering experenice and have a multi meter for checking circuits. please get back soon people. regards Jonathan

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09-24-2002, 17:39	#2 (permalink)
willy No Life Poster Join Date: Mar 2000 Location: inside NOKIA phone Age: 58 Posts: 1,677 Member: 1060 Status: Offline Thanks Meter: 10	Jonathan RAM bad, might becasue CCONT not support to RAM ,check at C131 and V116 VSRM ! or inside MAD is rusty ! try to check first 32.768 work or not, and then check 26Mhz to hager, and from hager to MAD ! Willy

09-24-2002, 17:53	#3 (permalink)
jonnywhit Freak Poster Join Date: Mar 2002 Location: uk Age: 39 Posts: 323 Member: 10559 Status: Offline Thanks Meter: 13	dont know how to check that mate? im a newbie. i got a mulit meter for testing circuits and stuff. i dont have a pic of pcb with descriptions of individual components either. regards Jonathan

09-24-2002, 18:05	#4 (permalink)
willy No Life Poster Join Date: Mar 2000 Location: inside NOKIA phone Age: 58 Posts: 1,677 Member: 1060 Status: Offline Thanks Meter: 10	Jonathan is it your multi meter can check 26Mhz /13 Mhz TCXO ? you can try this , put 10Kohm resistor to BSI to GND, and give B+ to GND have 4V , then you can make it work without casing ! Willy