Can filters make that phone conseme more than 400 MA?

[DREAMGSM]

All days come here nokia phones that consume more than 400MA and i can´t find solution, not PA, not capacitors from VBATT, Not dirty conectors... no preamp... sometimes i change filters from others nokia phones but only have a little variation of measure, anyway consume more than 400MA. ¿¿¿¿¿¿¿¿¿¿??????????

THX

B/R

[johny3310]

I don't think filters can create such problem, but it isn't impossible.
Which filters you tried to change?

Have you tried R301, L511?

Try to lower R529 value! (to 560 ohm).

I have seen some phones that consume more tham 400 mA with CCONT faulty...

[vule]

HIya


If phone ***** 400mAmps then something must be overheating...

Check ccont and if it warm more than normal check all lines which are supplying power to different phone parts...

Broken or bad soldered flash chip can cause this...
Also MCU can do same thing...Check VCORE line and all capacitors in all power supply lines...

Easy way to check it is to measure resistance from power line to ground. Compare values from broken phone with values from good one...Use service manual to determine components connected to power lines...

Also, check RF power output and do calibrations with wintesla if neccessary


BR


Vule

[noone0]

one day I had a prblem like that on a 8210... I changed the hagar and everything worked ok after that...

maybe this can help you

[willy]

Originally posted by DREAMGSM
All days come here nokia phones that consume more than 400MA and i can´t find solution, not PA, not capacitors from VBATT, Not dirty conectors... no preamp... sometimes i change filters from others nokia phones but only have a little variation of measure, anyway consume more than 400MA. ¿¿¿¿¿¿¿¿¿¿??????????

THX

B/R

DREAMGSM

could you please tell us, what mode phone it is ?
if you said that "filter" is RF part, then i can tell you , NEVER happen becasue RF filter !

try to check some capacitor around CHAPS

Willy

[DREAMGSM]

yes willy, i asked for rf filters, well ok, then only have last way, SUICIDE, ....
iT´S SEEM I NEVER WILL FIND THE PROBLEM IN 8210 AND 3310 MEASURED MORE THAN 420 ma

investigating, breaking but in this case no learn, at the moment, i will try in a mommnet tha repacement of the neared capacitors aoround the chap

Thank to all, specially Willy always in the way to help others, as those others, tanks again to all

[willy]

DREAMGSM

is it phone, even not power on, just give power supply, and it "eat" 420 mA already ?
if yes, then check all VB path ,.. or

one stupid way, but help
give phone power supply voltage, and start to remove parts you think it is "hot" or short or blocken parts


Willy

[DREAMGSM]

yes allready started this morning with a good new phone, looking for change the bad component, i hope i will can find quickly