n70 dead - GSM-Forum

shok9992000@yah · 10-01-2011, 18:12

i have repaired this set by making jumper for white screen hanging 1 week ago i have also changed lcd ic & lcd connector + lcd now after 1week customer bring it back in dead condition
now when i check it in ufs it says 1st boot error & mx key says Boot error: 03 00 72 72
if i remove jumpers and press power key then flash light glows & still same condition in ufs & mxkey .....
plz help me out frnds

Wites OM Tesla · 10-01-2011, 19:05

Quote:

Originally Posted by shok9992000@yah

i have repaired this set by making jumper for white screen hanging 1 week ago i have also changed lcd ic & lcd connector + lcd now after 1week customer bring it back in dead condition
now when i check it in ufs it says 1st boot error & mx key says Boot error: 03 00 72 72
if i remove jumpers and press power key then flash light glows & still same condition in ufs & mxkey .....
plz help me out frnds

Try reboll little flash near of Rap3g upper of it,make small bolls.
Also check Vcore=1.3v,Vio=1.8v etc.

shok9992000@yah · 10-02-2011, 07:11

if it is flash ic problem then why ufs says 1st boot error ????

Wites OM Tesla · 10-02-2011, 09:51

Quote:

Originally Posted by shok9992000@yah

if it is flash ic problem then why ufs says 1st boot error ????

Bro check all voltages that are shown in schematic is the easiest way to find
the problem.
if some voltage is missing post here i will say what is the problem more
precisely.

shok9992000@yah · 10-02-2011, 17:27

ok brother i will do that

shok9992000@yah · 10-03-2011, 08:27

sir there is no voltage on
VRCP2
VRCP1
VSIM2
VRFC
VAUX
VDRAM
is retu faulty ??

Wites OM Tesla · 10-03-2011, 09:24

Quote:

Originally Posted by shok9992000@yah

sir there is no voltage on
VRCP2
VRCP1
VSIM2
VRFC
VAUX
VDRAM
is retu faulty ??

Yes bro try reboll or replace.

shok9992000@yah · 10-03-2011, 15:03

i have changed retu but same condition now which ic ???

Wites OM Tesla · 10-03-2011, 16:36

Quote:

Originally Posted by shok9992000@yah

i have changed retu but same condition now which ic ???

Check Vcorea=1.4 if present at Tahvo Coil.
Also check Vio=1.8V and Vref=1.35V.

shok9992000@yah · 10-04-2011, 14:22

Quote:

Originally Posted by Wites

Check Vcorea=1.4 if present at Tahvo Coil.
Also check Vio=1.8V and Vref=1.35V.

above voltages are ok

Wites OM Tesla · 10-04-2011, 14:27

Quote:

Originally Posted by shok9992000@yah

above voltages are ok

Connect phone to Service dc power give 3.7V and see if something short
maybe is heating some component,if nothing short see how much amp
consume phone when you press ON/OFF.
Post Result.

shok9992000@yah · 10-06-2011, 07:23

it show about 15-16 when i pressed power key after that it gose to 9-10 for a while then it offs & get 0

Wites OM Tesla · 10-06-2011, 08:42

Quote:

Originally Posted by shok9992000@yah

it show about 15-16 when i pressed power key after that it gose to 9-10 for a while then it offs & get 0

Bro now i need to know what jumpers you made?If you made from VDDR_APE=1.8V to VDRAM=1.8V Then Replace SDRam 4MX16 ic D3001 i think it got damaged.

10-01-2011, 18:12	#1 (permalink)
shok9992000@yah No Life Poster Join Date: Sep 2007 Location: chattisgarh,India Posts: 601 Member: 578941 Status: Offline Thanks Meter: 108	n70 dead i have repaired this set by making jumper for white screen hanging 1 week ago i have also changed lcd ic & lcd connector + lcd now after 1week customer bring it back in dead condition now when i check it in ufs it says 1st boot error & mx key says Boot error: 03 00 72 72 if i remove jumpers and press power key then flash light glows & still same condition in ufs & mxkey ..... plz help me out frnds

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10-02-2011, 07:11	#3 (permalink)
shok9992000@yah No Life Poster Join Date: Sep 2007 Location: chattisgarh,India Posts: 601 Member: 578941 Status: Offline Thanks Meter: 108	if it is flash ic problem then why ufs says 1st boot error ????

10-02-2011, 17:27	#5 (permalink)
shok9992000@yah No Life Poster Join Date: Sep 2007 Location: chattisgarh,India Posts: 601 Member: 578941 Status: Offline Thanks Meter: 108	ok brother i will do that

10-03-2011, 08:27	#6 (permalink)
shok9992000@yah No Life Poster Join Date: Sep 2007 Location: chattisgarh,India Posts: 601 Member: 578941 Status: Offline Thanks Meter: 108	sir there is no voltage on VRCP2 VRCP1 VSIM2 VRFC VAUX VDRAM is retu faulty ??

10-03-2011, 15:03	#8 (permalink)
shok9992000@yah No Life Poster Join Date: Sep 2007 Location: chattisgarh,India Posts: 601 Member: 578941 Status: Offline Thanks Meter: 108	i have changed retu but same condition now which ic ???

10-06-2011, 07:23	#12 (permalink)
shok9992000@yah No Life Poster Join Date: Sep 2007 Location: chattisgarh,India Posts: 601 Member: 578941 Status: Offline Thanks Meter: 108	it show about 15-16 when i pressed power key after that it gose to 9-10 for a while then it offs & get 0