8850 problem - GSM-Forum

Finn · 02-26-2003, 16:25

I have an 8850 and it dont turn on
I can read/write flash.There is no checksum problem

Springer · 02-26-2003, 20:44

Hi
Change 26Mhz crystal oscillator,
test it
If no good, Change CCOnt,
test it
if not work,
Reball or change Hagar.
Try it!

willy · 02-26-2003, 20:56

If you can flash phone, and can read it too ...
all system clock must be working !

try plug charger , see what happen !
or try to give 2.8V to Btemp with in 1 sec to boot up phone !
or check BSI resistor value !

if all not help,, replace MAD or flash rom !

Willy

Finn · 02-27-2003, 20:04

Willy thanx for reply
I tried to charge it but it doesnt charge.
I ll try the other thing syou said

Fogot · 02-27-2003, 21:52

Check or replace 32.768 kHz crystal.
I have had exactly the same problem with 8210.

cmk · 02-28-2003, 23:17

dct3 phone power on no need 32.768khz

cmk · 02-28-2003, 23:22

try to give 2.8V to Btemp with in 1 sec to boot up phone

if power on your phone is 3 6 9 key open circuits

cmk · 02-28-2003, 23:24

or try use power supply set to 4.2v to test

Fogot · 03-01-2003, 22:40

Hi cmk
Have you ever try to turn on dct3 phone without 32.768 kHz crystal?
Finn can read/write flash but can't turn on...

kulibin · 03-01-2003, 23:00

Dct3 phone turn on without 32.768 kHz crystal

I think rehot PCB

02-26-2003, 16:25	#1 (permalink)
Finn Freak Poster Join Date: Dec 2001 Location: Chalkidiki/Greece Posts: 488 Member: 7731 Status: Offline Thanks Meter: 27	8850 problem I have an 8850 and it dont turn on I can read/write flash.There is no checksum problem

02-28-2003, 23:17	#6 (permalink)
cmk No Life Poster Join Date: Mar 2002 Location: Earth Age: 49 Posts: 587 Member: 10387 Status: Offline Thanks Meter: 3	dct3 phone power on no need 32.768khz Last edited by cmk; 02-28-2003 at 23:25.

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02-26-2003, 20:44	#2 (permalink)
Springer Freak Poster Join Date: Sep 2002 Location: Nokialand Age: 43 Posts: 147 Member: 15909 Status: Offline Thanks Meter: 0	Hi Change 26Mhz crystal oscillator, test it If no good, Change CCOnt, test it if not work, Reball or change Hagar. Try it!

02-26-2003, 20:56	#3 (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	If you can flash phone, and can read it too ... all system clock must be working ! try plug charger , see what happen ! or try to give 2.8V to Btemp with in 1 sec to boot up phone ! or check BSI resistor value ! if all not help,, replace MAD or flash rom ! Willy

02-27-2003, 20:04	#4 (permalink)
Finn Freak Poster Join Date: Dec 2001 Location: Chalkidiki/Greece Posts: 488 Member: 7731 Status: Offline Thanks Meter: 27	Willy thanx for reply I tried to charge it but it doesnt charge. I ll try the other thing syou said

02-27-2003, 21:52	#5 (permalink)
Fogot Major Poster Join Date: Feb 2001 Posts: 43 Member: 3202 Status: Offline Thanks Meter: 6	Check or replace 32.768 kHz crystal. I have had exactly the same problem with 8210.

02-28-2003, 23:22	#7 (permalink)
cmk No Life Poster Join Date: Mar 2002 Location: Earth Age: 49 Posts: 587 Member: 10387 Status: Offline Thanks Meter: 3	try to give 2.8V to Btemp with in 1 sec to boot up phone if power on your phone is 3 6 9 key open circuits

02-28-2003, 23:24	#8 (permalink)
cmk No Life Poster Join Date: Mar 2002 Location: Earth Age: 49 Posts: 587 Member: 10387 Status: Offline Thanks Meter: 3	or try use power supply set to 4.2v to test

03-01-2003, 22:40	#9 (permalink)
Fogot Major Poster Join Date: Feb 2001 Posts: 43 Member: 3202 Status: Offline Thanks Meter: 6	Hi cmk Have you ever try to turn on dct3 phone without 32.768 kHz crystal? Finn can read/write flash but can't turn on...

03-01-2003, 23:00	#10 (permalink)
kulibin Freak Poster Join Date: Oct 2002 Age: 41 Posts: 423 Member: 16452 Status: Offline Thanks Meter: 4	Dct3 phone turn on without 32.768 kHz crystal I think rehot PCB