View Full Version : t20 consuming new battery in 16 hours??
Hi,
I got this problem with many ericsson t20! they consume quickly a full charged battery (in 16 hours) and on another phone the some battery last for 3 days and more!!
i have flashed this phone with t20 to t29 flasher but with no result should i change also eeprom or it's hardware problem!
thanks fo help
it's hardware problem,
in 99% of cases it's 5CR microBga
also can be the IC that have legs from all four sides [signed as 11001 etc]
also can be faulty PA ...
b.r.
Alex.
what is 5CR???
where it's located on the pcb??
microera
10-04-2003, 12:11
>it's hardware problem,
>
>in 99% of cases it's 5CR microBga
I need too!!
Where is located this chip?
genocite
10-06-2003, 08:32
5CR is the power supply ic, located left side of the pa, and ' the IC that have legs from all four sides [signed as 11001 etc] " is the RF generator, located right and down side of the pa
microera
10-06-2003, 08:56
You mean:
1011102/ ... BGA ... is POWER chip
01011 ... smd ... is RF
1011120/ ... BGA ... is AUDIO chip
I replace POWER chip, but cosupation is still present!!
I mean that PA is faulty!:(
i had 2 phones with same problem..... both caused by bad rf...
dannyogolo
10-06-2003, 21:43
I used to think that this is caused by bad soldered PA, and I always repair them by reballing the PA. But in almost all cases, the phone dont consume battery anymore, but will develope network problem !!!!
So which is correct???
Lets hear from the experts
microera
10-07-2003, 08:13
Yestrday I replace RF ..... and today I will see that battery is still FULL!
So:
RF is solution!
and it will be the small circuit just under battery connector...or ...
number 9 on : inside-gsm (http://www.inside-gsm.com/Ericsson/T28s/Inside_T28s/Component_side_description_T28/component_side_description_t28.html)
i fixed many T20 with changing RF processor.
also R310 fixed this way.
Have here R520 , im gonna change Rf too , but its bga ic it this phone.
b.r.
Pali