ADVANCED CHIP-LEVEL REPAIRING
Advanced Chip-Level Course ah chuan phone dead leh fault harsa lehzual ho ah eng lai ber nge tih chhui lamah kan in focus nasa ber a logic, schematic leh datasheet hmangin kan diagnose thin.
IC kan thlak hmain engvang nge a function loh tih kan hre thiam hmasa thin. Mi tih dan entawna siam tha mai lo in mahni ngeiin a chhe lai chhui chhuah kan zir a, phone model thar a lo chhhuak zel ang a, chung hunah pawh chuan harsatna nei lo in hrethiam nghal zel turin kan inzirtir thin.
ADVANCED ZIR DAN KAl HMANG
Advanced course ah hian zirlaite chu professional thinking kan zirtir a.
Digital electronics hnathawh dan kan hrethiam phawt ang:
- Power
- Signal
- Command
- Schematic reading
- Confirm
DEAD PHONE CHECK DAN TUR STEP BY STEP
PMIC LEH AON
Hriatthiam hmasak ngai (Pawimawh):
- PMIC hnathawh dan
- AON (Always-On) awmzia
- Phone a in OFF lai pawha Current kalna leh a kal chhan
Steps:
- Battery → PMIC → AON rails
- AON a awm loh chuan CPU a nung thei lo
- Reset signal leh power rails
📌 AON awm loh chuan engmah a nung thei lo.
Step 1 — Dead Condition Hriat Thiam
Dc reading atangin phone chhung awmdan kan hre hmasa ang:
- Current draw awm lo
- Current draw hniam
- Current draw mumal lo
Dc reading a zirin a check lai tur a danglam.
Step 2 — PMIC leh Power Check
IC a chhia ti a kan mawhpuh hmain:
- Battery voltage PMIC ah thleng em?
- AON rails a awm em?
- PMIC a enable nge disable em?
Hemi hre tur chuan Multimeter leh schematic kan hmang thiam phawt ang
📌 PMIC thlak hi step hmasa a ni lo.
Step 3 — AON Signal Zirna (Pawimawh Ber)
Hemi step atang hi chuan chip-level thinking tak tak kan hman a ngai tan tawh.
Ka ngai pawimawh turte:
- Enable signal
- Reset signal
- PMIC leh CPU handshake logic
Steps:
- Eng signal nge kan hmasak ber tur?
- Eng signal ber vangin nge phone a nun theih loh?
- Line problem nge IC problem tih hriat hran
📌 He hmunah hian technician leh professional an inthlak.
Step 4 — Schematic Hmangin Diagnose Tih
- Schematic atangin component ho awmna kan en ang
- Phone eng line nge Signal atan a hman?
- IC in a mamawh ho a hmu kim em?
📌 Hetiang ho hi kan hre chiang vek tawh ang
Step 5 — Decision
Analysis zawh hnuah:
- IC problem → Reball → IC thlak
- Line problem → line siam
Phone chhia zawng zawng a siam that vek theih loh a, siam theih pawh a neituten to an tih chuan siam loh a tul chang a awm thin.
Advanced course atanga i zir chhuah tak chu:
- Confi takin IC i khawih thei tawh ang
- Problem awm tirtu i hre thiam ang
- Professional discipline
- Trial-and-error a tlem sawt tawh ang