8210 32k crystal rans on 12.5k - GSM-Forum

b0ba · 01-30-2003, 21:35

Hi! I have recieved phone after drop(as customer said "doesn't charge"). After some tests I have found out that 32k crystal is not generate at all. So I reheated CCONT. Now the phone starts charging, it starts itself and makes calls but all of the indications and sound are very slow, clock is slow also. As I said 1/3 of 32k. Sleep clock before reheating was 0.5Hz now it is apsent at all.
Any help will be appriciated.

Regards

01-30-2003, 22:18

well, replace RTC 32khz . . . ? ? ?

b0ba · 01-30-2003, 22:51

I have tried 3 crystals from 10000% working phones. I have put there a crystal from 3210 and still the same. Only 12.5KHz. 4.7MOhm resistor is ok.
I think some capacitor bisedes xtal is faulty. I wil try and post results tomorrow.

Regards

01-30-2003, 21:35	#1 (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	8210 32k crystal rans on 12.5k Hi! I have recieved phone after drop(as customer said "doesn't charge"). After some tests I have found out that 32k crystal is not generate at all. So I reheated CCONT. Now the phone starts charging, it starts itself and makes calls but all of the indications and sound are very slow, clock is slow also. As I said 1/3 of 32k. Sleep clock before reheating was 0.5Hz now it is apsent at all. Any help will be appriciated. Regards

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01-30-2003, 22:18	#2 (permalink)
legija Guest Posts: n/a Member:	well, replace RTC 32khz . . . ? ? ?

01-30-2003, 22:51	#3 (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	I have tried 3 crystals from 10000% working phones. I have put there a crystal from 3210 and still the same. Only 12.5KHz. 4.7MOhm resistor is ok. I think some capacitor bisedes xtal is faulty. I wil try and post results tomorrow. Regards