NMP7043 chip question - GSM-Forum

Burnt Cobba · 07-31-2002, 20:06

hi mates. Pls anyone exermineted on this chip? it is the one under the power switch on 82X0 and 33X0 near the sim card pads.

does any short on this chip kill the phoen once and for all?

thanks for any help
br to all
alv

THEKILLER · 07-31-2002, 20:44

but you want kill your mobile??

try clean it with water it´s more easy

Burnt Cobba · 08-01-2002, 01:00

no mate it is dead already

just wish to know if pin 14 is shorted to pin 13 what ****s up to make it non powering

alv

vule · 08-01-2002, 15:04

Change NMP7xxx and u solved prob if u r sure that it is reason of dead phone...But i don't think so...

I have never seen 33/82xx phone dead by NMP

NMP is UI circuit ( user interface ) and can not prevent phone from powering up even if LEDs are short circuited....

Anyway, try to flash phone and provide me more details...Maybe i can help u...

BR

Vule

Burnt Cobba · 08-01-2002, 16:52

this one had vibration trouble... it worked ok.. then by mistake i hit the link and the phone powered off.. i think some pins must have shorted on that IC.

I heard of a similar thing on 33X0 no ringer.

with this some other component blew up... but no idea which is to be replaced.

My ICQ is 25960690

thanks for youe assitance mate
alv

vule · 08-02-2002, 14:47

Hi

Just remove NMP and try to power up phone.....

Otherwise, change ccont and/ or 32768kHz osc B200

BR

Vule

Burnt Cobba · 08-02-2002, 15:17

where is B200 pls?i can find only B100
thanks
alv

Burnt Cobba · 08-02-2002, 16:06

well jsut to let you know Vule i changed this B100 a Xtal oscillator .. this oen had no RF and now it is back again. Hehe i trouble shooted for somethign and ended up hittign anotehr

thanks
alv

vule · 08-03-2002, 14:52

Sure u do......

U never mentioned that phone has other failures too....

B100 is 26MHz osc and if it is broken phone won't power up !
If B100 is unstable ( fluctuations in freq ) u won't get network !

B200 is near ccont ( looks like small stick ) and if it is broken phone won't power on.
If it is unstable, phone jam often or resets itself.....]

And how do u see that phone has network? That means that phone will power on now and u solved both problems???

BR

Vule

Burnt Cobba · 08-03-2002, 15:57

no mate i tried on another faulty 8210

it had not netowrk and fixed it.. but i need to fix this 8250

i stil lcant find this B200... search it comepltely the schema... psl can u send me an email with a diagram of it where it is on [email protected]

thanks a lot mate
alv

vule · 08-05-2002, 14:35

Hiya

Go to www.gsm-free.com and download service manuals

BR

Vule

Burnt Cobba · 08-05-2002, 21:20

got the service manual ... all i can find is B200

near which chip is B100 situated?? is it similar to B200?

thanks
alv

vule · 08-06-2002, 15:05

B200 is 32768 kHz and it's located near ccont....

B100 is 13 MHz osc and it looks like small metal box. It is located near hagar.....

BR

Vule

07-31-2002, 20:06	#1 (permalink)
Burnt Cobba No Life Poster Join Date: Apr 2002 Location: The Green Mile Posts: 3,653 Member: 11325 Status: Offline Thanks Meter: 266	NMP7043 chip question hi mates. Pls anyone exermineted on this chip? it is the one under the power switch on 82X0 and 33X0 near the sim card pads. does any short on this chip kill the phoen once and for all? thanks for any help br to all alv

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07-31-2002, 20:44	#2 (permalink)
THEKILLER Freak Poster Join Date: Aug 2001 Location: Pombal, Portugal Posts: 223 Member: 5977 Status: Offline Thanks Meter: 1	but you want kill your mobile?? try clean it with water it´s more easy

08-01-2002, 01:00	#3 (permalink)
Burnt Cobba No Life Poster Join Date: Apr 2002 Location: The Green Mile Posts: 3,653 Member: 11325 Status: Offline Thanks Meter: 266	no mate it is dead already just wish to know if pin 14 is shorted to pin 13 what ****s up to make it non powering alv

08-01-2002, 15:04	#4 (permalink)
vule No Life Poster Join Date: Apr 2002 Location: Radiometer Medical ApSBrønshøj Age: 51 Posts: 721 Member: 10854 Status: Offline Sonork: 1578988 Thanks Meter: 3	Change NMP7xxx and u solved prob if u r sure that it is reason of dead phone...But i don't think so... I have never seen 33/82xx phone dead by NMP NMP is UI circuit ( user interface ) and can not prevent phone from powering up even if LEDs are short circuited.... Anyway, try to flash phone and provide me more details...Maybe i can help u... BR Vule

08-01-2002, 16:52	#5 (permalink)
Burnt Cobba No Life Poster Join Date: Apr 2002 Location: The Green Mile Posts: 3,653 Member: 11325 Status: Offline Thanks Meter: 266	this one had vibration trouble... it worked ok.. then by mistake i hit the link and the phone powered off.. i think some pins must have shorted on that IC. I heard of a similar thing on 33X0 no ringer. with this some other component blew up... but no idea which is to be replaced. My ICQ is 25960690 thanks for youe assitance mate alv

08-02-2002, 14:47	#6 (permalink)
vule No Life Poster Join Date: Apr 2002 Location: Radiometer Medical ApSBrønshøj Age: 51 Posts: 721 Member: 10854 Status: Offline Sonork: 1578988 Thanks Meter: 3	Hi Just remove NMP and try to power up phone..... Otherwise, change ccont and/ or 32768kHz osc B200 BR Vule

08-02-2002, 15:17	#7 (permalink)
Burnt Cobba No Life Poster Join Date: Apr 2002 Location: The Green Mile Posts: 3,653 Member: 11325 Status: Offline Thanks Meter: 266	where is B200 pls?i can find only B100 thanks alv

08-02-2002, 16:06	#8 (permalink)
Burnt Cobba No Life Poster Join Date: Apr 2002 Location: The Green Mile Posts: 3,653 Member: 11325 Status: Offline Thanks Meter: 266	well jsut to let you know Vule i changed this B100 a Xtal oscillator .. this oen had no RF and now it is back again. Hehe i trouble shooted for somethign and ended up hittign anotehr thanks alv

08-03-2002, 14:52	#9 (permalink)
vule No Life Poster Join Date: Apr 2002 Location: Radiometer Medical ApSBrønshøj Age: 51 Posts: 721 Member: 10854 Status: Offline Sonork: 1578988 Thanks Meter: 3	Sure u do...... U never mentioned that phone has other failures too.... B100 is 26MHz osc and if it is broken phone won't power up ! If B100 is unstable ( fluctuations in freq ) u won't get network ! B200 is near ccont ( looks like small stick ) and if it is broken phone won't power on. If it is unstable, phone jam often or resets itself.....] And how do u see that phone has network? That means that phone will power on now and u solved both problems??? BR Vule

08-03-2002, 15:57	#10 (permalink)
Burnt Cobba No Life Poster Join Date: Apr 2002 Location: The Green Mile Posts: 3,653 Member: 11325 Status: Offline Thanks Meter: 266	no mate i tried on another faulty 8210 it had not netowrk and fixed it.. but i need to fix this 8250 i stil lcant find this B200... search it comepltely the schema... psl can u send me an email with a diagram of it where it is on [email protected] thanks a lot mate alv

08-05-2002, 14:35	#11 (permalink)
vule No Life Poster Join Date: Apr 2002 Location: Radiometer Medical ApSBrønshøj Age: 51 Posts: 721 Member: 10854 Status: Offline Sonork: 1578988 Thanks Meter: 3	Hiya Go to www.gsm-free.com and download service manuals BR Vule

08-05-2002, 21:20	#12 (permalink)
Burnt Cobba No Life Poster Join Date: Apr 2002 Location: The Green Mile Posts: 3,653 Member: 11325 Status: Offline Thanks Meter: 266	got the service manual ... all i can find is B200 near which chip is B100 situated?? is it similar to B200? thanks alv

08-06-2002, 15:05	#13 (permalink)
vule No Life Poster Join Date: Apr 2002 Location: Radiometer Medical ApSBrønshøj Age: 51 Posts: 721 Member: 10854 Status: Offline Sonork: 1578988 Thanks Meter: 3	B200 is 32768 kHz and it's located near ccont.... B100 is 13 MHz osc and it looks like small metal box. It is located near hagar..... BR Vule