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PREMIUM Xiaomi Redmi Note 9s Bootloop sa Mi logo.. Fixed!!!

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activa2r

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Staff member
Joined
Oct 30, 2022
Messages
714
sakit na talaga ng Note 9s to..
kung ang redmi note 9 nakukuha sa alis shield ng PA at thermistor
ito hindi :D :D :D

History
from other shops na
naka reball na rin CPU
ganun pa rin :D:D:D

status jan lang pabalik balik...

448734019_1025022145888736_4950370169888416679_n.jpg

sa ganitong scenario ng Note 9 RTC failure kaya bootloop
RTC nasa battery connected to thermistor malapit sa PA at CPU..
sinubukan ko alisin battery plug in charger nag Auto Reading sa schematic charger ng 2.1A
kaya sa isip ko alam na kung saan ako troubleshoot CHARGING SECTION

open borneo at sa kasamaang palad walang hARDWARE Solution pero may Schematic
mas lalo pang napaganda..

check schematic VBUS at ito yun
(may nakita akong 2 resistor bago pumasok sa Charging ic

Capture.PNG


check ko resistance at ayon nga sapol..
nag open si R2017 na dapat may 300k ohms resistance..

Capture2.PNG

replace lang R2017

448849728_3802978119937827_6548784723314409129_n.jpg





2d610a0a-64b6-431a-b8e5-687e4b859406.png


test and done..

448911071_436844985914112_1711753463111806513_n.jpg

ilang buwan din nakatambay sa mga shops
di na kaya binatwan na lang ...
pag same case / scenario ma padpad sa inyo try niyo lang to..
salamat mga idol...
 
salamat pag share idol and idol pa share nmn ng link ng resistor mo san mo nabili?thanks
 
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