{"id":27317,"date":"2023-03-23T16:46:57","date_gmt":"2023-03-23T09:46:57","guid":{"rendered":"https:\/\/hocvienit.vn\/?p=27317"},"modified":"2024-07-01T23:50:45","modified_gmt":"2024-07-01T16:50:45","slug":"pan-benh-laptop-dell-e6420-khong-kich-duoc","status":"publish","type":"post","link":"https:\/\/hocvienit.vn\/?p=27317","title":{"rendered":"Pan b\u1ec7nh: Laptop Dell E6420 kh\u00f4ng k\u00edch \u0111\u01b0\u1ee3c"},"content":{"rendered":"

Nh\u1eb1m h\u1ed7 tr\u1ee3 c\u00e1c b\u1ea1n k\u1ef9 thu\u1eadt vi\u00ean c\u00f3 th\u1ec3 nhanh ch\u00f3ng s\u1eeda ch\u1eefa ch\u00ednh x\u00e1c nh\u1eefng pan b\u1ec7nh ph\u1ed5 bi\u1ebfn tr\u00ean m\u00e1y t\u00ednh. H\u1ecdc vi\u1ec7n iT.vn chia s\u1ebb t\u1edbi c\u00e1c b\u1ea1n m\u1ed9t pan c\u01a1 b\u1ea3n tr\u00ean laptop cho anh em m\u1edbi v\u00e0o ngh\u1ec1 t\u1eeb HLV. Tr\u01b0\u01a1ng V\u0103n Sinh.\u00a0<\/span><\/p>\n

\"Pan
Pan b\u1ec7nh: Laptop Dell E6420 kh\u00f4ng k\u00edch \u0111\u01b0\u1ee3c<\/span><\/figcaption><\/figure>\n

Trong b\u00e0i vi\u1ebft ng\u00e0y h\u00f4m nay, ch\u00fang ta s\u1ebd c\u00f9ng t\u00ecm hi\u1ec3u quy tr\u00ecnh s\u1eeda ch\u1eefa laptop Dell E6420 kh\u00f4ng k\u00edch \u0111\u01b0\u1ee3c<\/strong>.<\/span><\/p>\n

Xem th\u00eam:\u00a0Pan b\u1ec7nh: Laptop Samsung RV411 kh\u00f4ng b\u1eadt \u0111\u01b0\u1ee3c ngu\u1ed3n<\/a><\/span><\/p><\/blockquote>\n

Nguy\u00ean nh\u00e2n<\/strong><\/span><\/h2>\n

Laptop Dell E6420 kh\u00f4ng k\u00edch \u0111\u01b0\u1ee3c do m\u1ea5t +3.3V_ALWP, +5V_ALWP, nguy\u00ean nh\u00e2n do ch\u1eadp t\u1ee5 PC1.<\/span><\/p>\n

Thao t\u00e1c s\u1eeda ch\u1eefa<\/strong><\/span><\/h2>\n

B\u00ecnh th\u01b0\u1eddng v\u1edbi m\u00e1y n\u00e0y, khi c\u1eafm s\u1ea1c s\u1ebd c\u00f3 lu\u00f4n hai ngu\u1ed3n k\u1ec3 tr\u00ean \u0111\u1ec3 c\u00f3 ngu\u1ed3n c\u1ea5p cho m\u1ea1ch k\u00edch ngu\u1ed3n, nh\u01b0ng trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y \u0111o kh\u00f4ng c\u00f3.<\/span><\/p>\n

Ti\u1ebfn h\u00e0nh \u0111o \u0111\u1ea1c t\u00ecm nguy\u00ean nh\u00e2n, th\u1ea5y:<\/span><\/p>\n

B\u01b0\u1edbc 1:<\/strong> Tr\u1edf kh\u00e1ng so v\u1edbi mass c\u1ee7a hai ngu\u1ed3n +3.3V_ALWP, +5V_ALWP cao, kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng ch\u1ea1m ch\u1eadp.<\/span><\/p>\n

\"T\u1ee5
T\u1ee5 PC1 tr\u00ean s\u01a1 \u0111\u1ed3 m\u1ea1ch<\/span><\/figcaption><\/figure>\n

B\u01b0\u1edbc 2:<\/strong> Ph\u00e2n t\u00edch \u0111i\u1ec1u ki\u1ec7n c\u01a1 b\u1ea3n \u0111\u1ec3 c\u00f3 IC PU2 t\u1ea1o ra 3V5V trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y c\u1ea7n c\u00f3:\u00a0<\/span><\/p>\n

– Ch\u00e2n 6 (Vin) 19V (\u0110i\u1ec7n \u00e1p s\u1ea1c, khi c\u1eafm s\u1ea1c) \u0111o \u0111\u00e3 c\u00f3 19V ch\u00e2n n\u00e0y t\u1ed1t.<\/span><\/p>\n

– Ch\u00e2n 4 (En_LDO) 3.3V (L\u1ec7nh t\u1ea1o ra ngu\u1ed3n 5V_ALW2P \u0111\u1ec3 nu\u00f4i kh\u1ed1i t\u1ea1o xung, setup xung cho IC) \u0111o ch\u00e2n n\u00e0y c\u00f3 0V, b\u1ea5t th\u01b0\u1eddng.\u00a0<\/span><\/p>\n

– Ch\u00e2n 14, 27 (EN1, EN2) 3.3V (L\u1ec7nh m\u1edf xung \u0111i\u1ec1u khi\u1ec3n fet 3V5V) \u0111o ch\u00e2n n\u00e0y c\u00f3 0V, b\u1ea5t th\u01b0\u1eddng.<\/span><\/p>\n

\"S\u01a1
S\u01a1 \u0111\u1ed3 m\u1ea1ch m\u00e1y laptop Dell E6420<\/span><\/figcaption><\/figure>\n

Xem m\u1ea1ch th\u1ea5y: Ch\u00e2n 4, ch\u00e2n 14, ch\u00e2n 27 d\u00f9ng chung m\u1ed9t l\u1ec7nh EN_3V_5V.<\/span><\/p>\n

\"L\u1ec7nh
L\u1ec7nh EN_3V_5V tr\u00ean s\u01a1 \u0111\u1ed3 m\u1ea1ch<\/span><\/figcaption><\/figure>\n

– \u0110\u1ec3 EN_3V_5V \u1edf m\u1ee9c cao th\u00ec c\u1ea7n: THERM_STP# ko k\u00e9o mass v\u00e0 ALWON c\u00f3 3.3<\/span>V.<\/span><\/span><\/p>\n

\u0110o ch\u00e2n 2 c\u1ee7a PR42 th\u1ea5y c\u00f3 0V t\u00ecm \u0111\u01b0\u1ee3c nguy\u00ean nh\u00e2n m\u1ea5t EN_3V_5V do l\u1ed7i AlWON.<\/span><\/p>\n

– AlWON do i\/o U51 (MEC5055-LZY) t\u1ea1o ra: \u0110\u1ec3 t\u1ea1o ra \u0111\u01b0\u1ee3c ALWON th\u00ec U51 c\u1ea7n c\u00f3 \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n (khi c\u1eafm s\u1ea1c):\u00a0<\/span><\/p>\n