7650 insert sim card (with sim in) - GSM-Forum

Uvedovle · 03-01-2004, 12:11

Is not card reader problem...tested.

Will probably be the sim filter, but i don´t know where is.

Some help please.

Best regards

spectrum · 03-01-2004, 13:40

Have you confirmed that the voltage at Vsim point is 2.8V when you power on?
If you have a test jig, life will be easier

Uvedovle · 03-01-2004, 17:39

Show me where is this point please,

regards and thanks

spectrum · 03-01-2004, 18:04

1 2 3
- - -

4 5 6
- - -

This is the picture of the sim, when you are facing the board, from the ribbon cable side.

1= Sim Data
2= NC
3= Gnd
4= Clk
5= RST
6= VSIM, which should be 2.8v, when you power on the phone.

spectrum · 03-01-2004, 18:06

I am using the diagram that came with my test jig
May be if you check spunlock site, you may get a complete circuit diagram
Thx

Hanukkah · 03-02-2004, 06:32

Just do a basic reflow of SIM filter. It is a square gold just above PA.

Uvedovle · 03-02-2004, 10:37

There is no voltage in sim card reader, what is the problem??

Thanks

Medz · 03-02-2004, 15:50

@Uvedovle..

The problem could be from the UEM it self ,if there is no 2.8 volts over C221 ( It comes directly from the SIM plates to C221 to the UEM pin 3C ).
Otherwise and as " Hanukkah " says the SIM reader plates goes to the golden square component ( R470 ) over the Power Ampl. , then to the UEM as :
SIM Data = B2
SIM Rst = A2
SIM Clk = B3

GoodLuck

Medz · 03-02-2004, 15:59

And here is the location of the capasitor

Uvedovle · 03-02-2004, 17:06

c199=1.8v
c221=0v

Next step please

Medz · 03-02-2004, 19:59

OK ..
Freind , Next step .. is the UEM !! but befor it , U can raise R221 mesure it's resistance with multimeter ( it has no resistance of corse = Open in normal conditions ) , and also the resistance of its points onboard.
If every thing is OK , no way go to UEM activley

GoodLuck

Uvedovle · 03-03-2004, 10:59

Both resistances was ok, so if the problem is in UEM, i´ll try to change, but first i have to buy, and don´t know where.

@All
Thanks for the info, i learned a lot

Best regards

spectrum · 03-03-2004, 13:10

Check:www.themobileking.com

Uvedovle · 03-03-2004, 19:02

Thanks spectrum, i have just find it

TUSHAR · 03-05-2004, 06:59

chack strip

repaired lot

03-01-2004, 12:11	#1 (permalink)
Uvedovle No Life Poster Join Date: Apr 2002 Location: South Spain Age: 41 Posts: 2,247 Member: 10905 Status: Offline Thanks Meter: 109	7650 insert sim card (with sim in) Is not card reader problem...tested. Will probably be the sim filter, but i don´t know where is. Some help please. Best regards

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03-01-2004, 13:40	#2 (permalink)
spectrum No Life Poster Join Date: Oct 2002 Posts: 1,126 Member: 17330 Status: Offline Thanks Meter: 15	Have you confirmed that the voltage at Vsim point is 2.8V when you power on? If you have a test jig, life will be easier

03-01-2004, 17:39	#3 (permalink)
Uvedovle No Life Poster Join Date: Apr 2002 Location: South Spain Age: 41 Posts: 2,247 Member: 10905 Status: Offline Thanks Meter: 109	Show me where is this point please, regards and thanks

03-01-2004, 18:04	#4 (permalink)
spectrum No Life Poster Join Date: Oct 2002 Posts: 1,126 Member: 17330 Status: Offline Thanks Meter: 15	1 2 3 - - - 4 5 6 - - - This is the picture of the sim, when you are facing the board, from the ribbon cable side. 1= Sim Data 2= NC 3= Gnd 4= Clk 5= RST 6= VSIM, which should be 2.8v, when you power on the phone.

03-01-2004, 18:06	#5 (permalink)
spectrum No Life Poster Join Date: Oct 2002 Posts: 1,126 Member: 17330 Status: Offline Thanks Meter: 15	I am using the diagram that came with my test jig May be if you check spunlock site, you may get a complete circuit diagram Thx

03-02-2004, 06:32	#6 (permalink)
Hanukkah No Life Poster Join Date: Jul 2001 Location: RP Age: 48 Posts: 890 Member: 5246 Status: Offline Thanks Meter: 9	Just do a basic reflow of SIM filter. It is a square gold just above PA.

03-02-2004, 10:37	#7 (permalink)
Uvedovle No Life Poster Join Date: Apr 2002 Location: South Spain Age: 41 Posts: 2,247 Member: 10905 Status: Offline Thanks Meter: 109	There is no voltage in sim card reader, what is the problem?? Thanks

03-02-2004, 15:50	#8 (permalink)
Medz No Life Poster Join Date: Sep 2003 Age: 66 Posts: 807 Member: 39601 Status: Offline Thanks Meter: 13	@Uvedovle.. The problem could be from the UEM it self ,if there is no 2.8 volts over C221 ( It comes directly from the SIM plates to C221 to the UEM pin 3C ). Otherwise and as " Hanukkah " says the SIM reader plates goes to the golden square component ( R470 ) over the Power Ampl. , then to the UEM as : SIM Data = B2 SIM Rst = A2 SIM Clk = B3 GoodLuck

03-02-2004, 17:06	#10 (permalink)
Uvedovle No Life Poster Join Date: Apr 2002 Location: South Spain Age: 41 Posts: 2,247 Member: 10905 Status: Offline Thanks Meter: 109	c199=1.8v c221=0v Next step please

03-02-2004, 19:59	#11 (permalink)
Medz No Life Poster Join Date: Sep 2003 Age: 66 Posts: 807 Member: 39601 Status: Offline Thanks Meter: 13	OK .. Freind , Next step .. is the UEM !! but befor it , U can raise R221 mesure it's resistance with multimeter ( it has no resistance of corse = Open in normal conditions ) , and also the resistance of its points onboard. If every thing is OK , no way go to UEM activley GoodLuck

03-03-2004, 10:59	#12 (permalink)
Uvedovle No Life Poster Join Date: Apr 2002 Location: South Spain Age: 41 Posts: 2,247 Member: 10905 Status: Offline Thanks Meter: 109	Both resistances was ok, so if the problem is in UEM, i´ll try to change, but first i have to buy, and don´t know where. @All Thanks for the info, i learned a lot Best regards

03-03-2004, 13:10	#13 (permalink)
spectrum No Life Poster Join Date: Oct 2002 Posts: 1,126 Member: 17330 Status: Offline Thanks Meter: 15	Check:www.themobileking.com

03-03-2004, 19:02	#14 (permalink)
Uvedovle No Life Poster Join Date: Apr 2002 Location: South Spain Age: 41 Posts: 2,247 Member: 10905 Status: Offline Thanks Meter: 109	Thanks spectrum, i have just find it

03-05-2004, 06:59	#15 (permalink)
TUSHAR Junior Member Join Date: Sep 2002 Location: MUMBAI (INDIA) Age: 54 Posts: 25 Member: 15342 Status: Offline Thanks Meter: 1	chack strip repaired lot