{"id":9779,"date":"2022-03-05T09:16:36","date_gmt":"2022-03-05T02:16:36","guid":{"rendered":"https:\/\/tct.vn\/blog\/?p=9779"},"modified":"2022-03-05T15:05:25","modified_gmt":"2022-03-05T08:05:25","slug":"cac-benh-lien-quan-mang-hinh-lcd-laptop-sang-trangmo","status":"publish","type":"post","link":"https:\/\/tct.vn\/blog\/cac-benh-lien-quan-mang-hinh-lcd-laptop-sang-trangmo\/","title":{"rendered":"C\u00e1c b\u1ec7nh li\u00ean quan M\u00e0ng h\u00ecnh LCD laptop (s\u00e1ng tr\u1eafng,m\u1edd)"},"content":{"rendered":"
M\u00e0n LCDTr\u00ean c\u00e1c lo\u1ea1i m\u00e0n h\u00ecnh LCD th\u01b0\u1eddng c\u00f3 c\u00e1c lo\u1ea1i m\u1ea1ch \u0111i\u1ec7n ch\u00ednh sau \u0111\u00e2y.
\nM\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u00e1p cho m\u00e0n h\u00ecnh.
\nIC gi\u1ea3i m\u00e3 t\u00edn hi\u1ec7u LVDS v\u00e0 \u0111i\u1ec1u khi\u1ec3n qu\u00e9t.<\/div>\n

Ngo\u00e0i ra tr\u00ean c\u00e1c m\u00e0n h\u00ecnh Wide ho\u1eb7c m\u00e0n h\u00ecnh c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao th\u00ec th\u01b0\u1eddng c\u00f3 m\u1ed9t ROM BIOS tr\u00ean v\u1ec9 m\u1ea1ch c\u1ee7a m\u00e0n h\u00ecnh.
\nI \u2013 M\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u00e1p cho m\u00e0n h\u00ecnh.
\n1) Ch\u1ee9c n\u0103ng c\u1ee7a m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u00e1p
\n\u2013 T\u1ea1o ra \u0111i\u1ec7n \u00e1p d\u01b0\u01a1ng 8 \u0111\u1ebfn 10V c\u1ea5p cho m\u00e0n h\u00ecnh.
\n\u2013 T\u1ea1o ra \u0111i\u1ec7n \u00e1p \u00e2m t\u1eeb -8 \u0111\u1ebfn -10V c\u1ea5p cho m\u00e0n h\u00ecnh.
\n\u2013 T\u1ea1o ra \u0111i\u1ec7n \u00e1p d\u01b0\u01a1ng t\u1eeb 22 \u0111\u1ebfn 24V c\u1ea5p cho m\u00e0n h\u00ecnh.<\/p>\n

\"\"<\/div>\n

B\u00ecnh th\u01b0\u1eddng<\/p>\n

2) S\u01a1 \u0111\u1ed3 nguy\u00ean l\u00fd m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u00e1p c\u1ea5p cho m\u00e0n h\u00ecnh.<\/p>\n

\"\"<\/div>\n

S\u01a1 \u0111\u1ed3 m\u1ea1ch 1<\/p>\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n ngu\u1ed3n cho m\u00e0n h\u00ecnh.<\/p>\n

M\u1ea1ch x\u1eed d\u1ee5ng nguy\u00ean l\u00fd ngu\u1ed3n xung t\u0103ng \u00e1p, \u0111\u1ea7u ra s\u1eed d\u1ee5ng m\u1ea1ch ch\u1ec9nh l\u01b0u d\u01b0\u01a1ng, ch\u1ec9nh l\u01b0u \u00e2m v\u00e0 ch\u1ec9nh l\u01b0u b\u1ed9i \u00e1p.<\/p>\n

\u2013 \u0110i\u1ec7n \u00e1p Vin (3,3V) \u0111i v\u00e0o m\u1ea1ch v\u00e0 c\u1ea5p ngu\u1ed3n cho m\u1ea1ch dao \u0111\u1ed9ng trong IC qua ch\u00e2n IN.<\/p>\n

\u2013 M\u1ea1ch dao \u0111\u1ed9ng t\u1ea1o ra xung \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n cho \u0111\u00e8n c\u00f4ng su\u1ea5t ho\u1ea1t \u0111\u1ed9ng ng\u1eaft m\u1edf.<\/p>\n

\u2013 D\u00f2ng \u0111i\u1ec7n \u0111i qua cu\u1ed9n d\u00e2y L1 r\u1ed3i \u0111i v\u00e0o ch\u00e2n D \u0111\u00e8n c\u00f4ng su\u1ea5t (trong IC) qua ch\u00e2n LX.<\/p>\n

\u2013 Khi \u0111\u00e8n c\u00f4ng su\u1ea5t ho\u1ea1t \u0111\u1ed9ng ng\u1eaft m\u1edf, ph\u00eda sau cu\u1ed9n d\u00e2y L1 ta thu \u0111\u01b0\u1ee3c \u0111i\u1ec7n \u00e1p d\u1ea1ng xung.<\/p>\n

\u0110i\u1ec7n \u00e1p xung \u1edf sau cu\u1ed9n L1 (ch\u00e2n LX) s\u1ebd \u0111\u01b0\u1ee3c c\u00e1c m\u1ea1ch ch\u1ec9nh l\u01b0u, ch\u1ec9nh l\u01b0u \u0111\u1ec3 l\u1ea5y ra c\u00e1c \u0111i\u1ec7n \u00e1p.<\/p>\n

\u2013 M\u1ea1ch ch\u1ec9nh l\u01b0u D1 v\u00e0 c\u00e1c t\u1ee5 C3, C4, C5 s\u1ebd ch\u1ec9nh l\u01b0u v\u00e0 l\u1ecdc \u0111\u1ec3 l\u1ea5y ra \u0111i\u1ec7n \u00e1p d\u01b0\u01a1ng 8,5V (V_MAIN)<\/p>\n

\u2013 M\u1ea1ch ch\u1ec9nh l\u01b0u C6, D2 v\u00e0 C15 s\u1ebd t\u1ea1o ra \u0111i\u1ec7n \u00e1p \u00e2m -8V (V_GOFF), \u0111i\u1ec7n \u00e1p n\u00e0y \u0111\u01b0\u1ee3c \u0111\u01b0a \u0111\u1ebfn c\u00e1c IC-V.Drive<\/p>\n

sau \u0111\u00f3 \u0111\u01b0a \u0111\u1ebfn c\u00e1c \u0111\u01b0\u1eddng ngang nh\u1eb1m kho\u00e1 c\u00e1c Transistor tr\u00ean c\u00e1c \u0111i\u1ec3m \u1ea3nh.<\/p>\n

\u2013 M\u1ea1ch ch\u1ec9nh l\u01b0u b\u1ed9i \u00e1p g\u1ed3m c\u00e1c linh ki\u1ec7n C17, C18, D3, D4, C19, C14 s\u1ebd t\u1ea1o ra \u0111i\u1ec7n \u00e1p d\u01b0\u01a1ng 24V c\u1ea5p v\u00e0o ch\u00e2n<\/p>\n

SRC c\u1ee7a IC.<\/p>\n

\u2013 \u0110i\u1ec7n \u00e1p 24V \u0111\u01b0a v\u00e0o m\u1ea1ch Switch Control trong IC \u0111\u1ec3 t\u1ea1o ra \u0111i\u1ec7n \u00e1p G.ON, \u0111i\u1ec7n \u00e1p n\u00e0y s\u1ebd \u0111\u01b0a \u0111\u1ebfn c\u00e1c IC \u2013 V.Drive<\/p>\n

\u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n c\u00e1c h\u00e0ng ngang nh\u1eb1m \u0111\u01b0a ch\u00e2n G c\u1ee7a c\u00e1c Transistor tr\u00ean c\u00e1c \u0111i\u1ec3m \u1ea3nh l\u00ean m\u1ee9c cao\u2026<\/p>\n

\"\"<\/div>\n

 <\/p>\n

\"\"<\/div>\n

S\u01a1 \u0111\u1ed3 m\u1ea1ch<\/p>\n

Ch\u00fa th\u00edch c\u00e1c ch\u00e2n IC.
\nIN \u2013 Ch\u00e2n \u0111i\u1ec7n \u00e1p nu\u00f4i m\u1ea1ch dao \u0111\u1ed9ng.
\nSHDN \u2013 L\u1ec7nh Shutdow t\u1eaft IC n\u1ebfu c\u00f3 m\u1ee9c th\u1ea5p.
\nSRC \u2013 \u0110i\u1ec7n \u00e1p 24V \u0111i v\u00e0o chuy\u1ec3n m\u1ea1ch.
\nGON \u2013 \u0110i\u1ec7n \u00e1p t\u1eeb chuy\u1ec3n m\u1ea1ch \u0111i ra.
\nDRN \u2013 Ch\u00e2 ti\u1ebfp mass cho chuy\u1ec3n m\u1ea1ch.
\nCTL \u2013 Xung \u0111i\u1ec1u khi\u1ec3n chuy\u1ec3n m\u1ea1ch.
\nFB \u2013 \u0110i\u1ec7n \u00e1p h\u1ed3i ti\u1ebfp.
\nCOMP \u2013 Ch\u00e2n<\/p>\n

3) H\u01b0 h\u1ecfng th\u01b0\u1eddng g\u1eb7p v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra.<\/p>\n

B\u1ec7nh 1 \u2013 H\u1ecfng m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u00e1p, m\u1ea5t to\u00e0n b\u1ed9 ho\u1eb7c m\u1ea5t m\u1ed9t trong s\u1ed1 c\u00e1c \u0111i\u1ec7n \u00e1p sau:<\/p>\n

(m\u1ea5t 8,5V, m\u1ea5t -8V ho\u1eb7c m\u1ea5t 24V) Bi\u1ec3u hi\u1ec7n khi m\u1ea5t c\u1ea3 ba \u0111i\u1ec7n \u00e1p tr\u00ean ho\u1eb7c m\u1ea5t \u0111i\u1ec7n \u00e1p 8,5V<\/p>\n

\u2013 M\u00e0n h\u00ecnh s\u1ebd b\u1ecb s\u00e1ng tr\u1eafng, kh\u00f4ng c\u00f3 h\u00ecnh , thay th\u1ebf m\u00e0n h\u00ecnh kh\u00e1c th\u00ec ch\u1ea1y b\u00ecnh th\u01b0\u1eddng<\/p>\n

\"\"<\/div>\n

N\u1ebfu h\u1ecfng m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u00e1p, m\u00e0n h\u00ecnh s\u1ebd b\u1ecb s\u00e1ng tr\u1eafng kh\u00f4ng c\u00f3 h\u00ecnh.<\/p>\n

C\u00e1ch ki\u1ec3m tra:<\/p>\n

\"\"<\/div>\n

\u2013 Ki\u1ec3m tra \u0111i\u1ec7n \u00e1p t\u1ea1i ch\u00e2n cu\u1ed9n d\u00e2y xem c\u00f3 3,3V kh\u00f4ng ?, n\u1ebfu m\u1ea5t \u0111i\u1ec7n \u00e1p \u1edf \u0111\u00e2y l\u00e0 do \u0111\u1ee9t c\u1ea7u ch\u00ec F1.<\/p>\n

\u2013 N\u1ebfu c\u00f3 \u0111i\u1ec7n \u00e1p \u1edf ch\u00e2n cu\u1ed9n d\u00e2y th\u00ec b\u1ea1n h\u00e3y ki\u1ec3m tra \u0111i\u1ec7n \u00e1p \u1edf sau \u0110i \u1ed1t D1 xem c\u00f3 kho\u1ea3ng 8,5V kh\u00f4ng ?<\/p>\n

N\u1ebfu kh\u00f4ng c\u00f3 \u0111i\u1ec7n \u00e1p ra t\u0103ng l\u00ean l\u00e0 bi\u1ec3u hi\u1ec7n c\u1ee7a m\u1ea1ch ch\u01b0a ho\u1ea1t \u0111\u1ed9ng.<\/p>\n

Ph\u00e2n t\u00edch:<\/p>\n

\u2013 N\u1ebfu b\u1ea1n t\u00ecm th\u1ea5y c\u00f3 m\u1ed9t \u0111i\u1ec7n \u00e1p ra cao h\u01a1n \u0111i\u1ec7n \u00e1p v\u00e0o (3,3V) => th\u00ec suy ra m\u1ea1ch dao \u0111\u1ed9ng v\u00e0 c\u00f4ng su\u1ea5t \u0111\u00e3<\/p>\n

ho\u1ea1t \u0111\u1ed9ng, ch\u1eafc ch\u1eafn l\u00e0 m\u1ea1ch h\u1ecfng \u0111i \u1ed1t ho\u1eb7c t\u1ee5, th\u00f4ng th\u01b0\u1eddng hay h\u1ecfng \u0111i \u1ed1t.<\/p>\n

\u2013 N\u1ebfu b\u1ea1n kh\u00f4ng t\u00ecm th\u1ea5y c\u00f3 \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra n\u00e0o l\u1edbn h\u01a1n \u0111\u1ea7u v\u00e0o => ch\u1ee9ng t\u1ecf l\u00e0 m\u1ea1ch ch\u01b0a ho\u1ea1t \u0111\u1ed9ng, c\u00f3 th\u1ec3<\/p>\n

h\u1ecfn IC dao \u0111\u1ed9ng v\u00e0 c\u00f4ng su\u1ea5t.<\/p>\n

\u2013 Trong th\u1ef1c t\u1ebf m\u1ea1ch ngu\u1ed3n n\u00e0y hay h\u1ecfng c\u00e1c \u0111i \u1ed1t ch\u1ec9nh l\u01b0u, khi \u0111\u00f3 d\u1eabn \u0111\u1ebfn m\u1ea5t m\u1ed9t \u0111i\u1ec7n \u00e1p ho\u1eb7c m\u1ea5t to\u00e0n b\u1ed9<\/p>\n

\u0111i\u1ec7n \u00e1p.<\/p>\n

\"\"<\/div>\n

Bi\u1ec3u hi\u1ec7n khi m\u00e0n h\u00ecnh b\u1ecb m\u1ea5t \u0111i\u1ec7n \u00e1p 24V.<\/p>\n

\"\"<\/div>\n

M\u1edd H\u00ecnh<\/p>\n

N\u1ebfu m\u1ea5t 24V (nh\u01b0ng v\u1eabn c\u00f2n \u0111i\u1ec7n \u00e1p 8,5V v\u00e0 \u00e2m -8V) th\u00ec m\u00e0n h\u00ecnh b\u1ecb m\u1edd nh\u01b0 tr\u00ean.<\/p>\n

\"\"<\/div>\n

Diode<\/p>\n

Bi\u1ec3u hi\u1ec7n khi m\u00e0n h\u00ecnh b\u1ecb m\u1ea5t \u0111i\u1ec7n \u00e1p \u00e2m -8V<\/p>\n

Khi m\u00e0n h\u00ecnh ch\u1ec9 b\u1ecb m\u1ea5t \u0111i\u1ec7n \u00e1p \u00e2m (v\u1eabn c\u00f3 c\u00e1c \u0111i\u1ec7n \u00e1p d\u01b0\u01a1ng) th\u00ec m\u00e0n h\u00ecnh c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng nh\u01b0 tr\u00ean.<\/p>\n

\"\"<\/div>\n

B\u1ea1n h\u00e3y ki\u1ec3m tra c\u00e1c \u0111i \u1ed1t, n\u1ebfu \u0111i \u1ed1t ch\u1ec9nh l\u01b0u \u00e1p \u00e2m b\u1ecb ch\u1ebft th\u00ec s\u1ebd m\u1ea5t \u0111i\u1ec7n \u00e1p \u00e2m -8V<\/p>\n

II \u2013 IC gi\u1ea3i m\u00e3 t\u00edn hi\u1ec7u LVDS tr\u00ean m\u00e0n h\u00ecnh.<\/p>\n

1) T\u00edn hi\u1ec7u LVDS l\u00e0 g\u00ec ? LVDS l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a (Low Voltage Differential Signal) \u2013 T\u00edn hi\u1ec7u vi ph\u00e2n \u0111i\u1ec7n \u00e1p th\u1ea5p.<\/p>\n

\u2013 Th\u1ef1c ch\u1ea5t t\u00edn hi\u1ec7u t\u1eeb Chip Video l\u00e0 c\u00e1c t\u00edn hi\u1ec7u s\u1ed1 R_Digital (8 bit), G_Digital (8 bit), B_Digital (8 bit), Dot Clock, H.S, V.S<\/p>\n

\u2013 C\u00e1c t\u00edn hi\u1ec7u tr\u00ean c\u00f3 th\u1ec3 \u0111\u01b0a tr\u1ef1c ti\u1ebfp l\u00ean \u0111\u00e8n h\u00ecnh v\u00e0 \u0111\u01b0a th\u1eb3ng v\u00e0o c\u00e1c chip H.Drive \u1edf m\u00e9p tr\u00ean v\u00e0 chip V.Drive \u1edf m\u00e9p b\u00ean<\/p>\n

c\u1ea1nh c\u1ee7a m\u00e0n h\u00ecnh.<\/p>\n

\u2013 C\u00e1c t\u00edn hi\u1ec7u s\u1ed1 m\u00e0 Chip video t\u1ea1o ra c\u00f3 24 b\u00edt d\u1eef li\u1ec7u h\u00ecnh \u1ea3nh, 3 t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n, n\u1ebfu t\u00ednh c\u1ea3 \u0111\u01b0\u1eddng Vcc v\u00e0 \u0111\u01b0\u1eddng Mass th\u00ec<\/p>\n

s\u1ed1 l\u01b0\u1ee3ng \u0111\u01b0\u1eddng d\u00e2y c\u00f3 th\u1ec3 l\u00ean t\u1edbi 40 \u0111\u01b0\u1eddng. (v\u1edbi m\u00e0n 15\u2033 tr\u1edf xu\u1ed1ng)<\/p>\n

\u2013 Tr\u00ean c\u00e1c m\u00e0n h\u00ecnh Wide ho\u1eb7c m\u00e0n h\u00ecnh 17\u2033 th\u00ec s\u1ed1 l\u01b0\u1ee3ng \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u tr\u00ean s\u1ebd \u0111\u01b0\u1ee3c nh\u00e2n \u0111\u00f4i, v\u00ec v\u1eady n\u00f3 c\u00f3 th\u1ec3 l\u00ean t\u1edbi 80<\/p>\n

\u0111\u01b0\u1eddng d\u00e2y, ngo\u00e0i ra c\u00e1c t\u00edn hi\u1ec7u n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u k\u00e9m.<\/p>\n

\"\"<\/div>\n

\u0110\u1ec3 kh\u1eafc ph\u1ee5c c\u00e1c nh\u01b0\u1ee3c \u0111i\u1ec3m nh\u01b0 kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u k\u00e9m, s\u1ed1 l\u01b0\u1ee3ng \u0111\u01b0\u1eddng m\u1ea1ch r\u1ea5t nhi\u1ec1u, ng\u01b0\u1eddi ta \u0111\u00e3 m\u00e3 ho\u00e1 c\u00e1c t\u00edn hi\u1ec7u<\/p>\n

tr\u00ean th\u00e0nh m\u1ed9t d\u1ea1ng t\u00edn hi\u1ec7u vi ph\u00e2n g\u1ecdi l\u00e0 t\u00edn hi\u1ec7u LVDS.<\/p>\n

\u2013 T\u00edn hi\u1ec7u LVDS tr\u00ean c\u00e1c m\u00e0n h\u00ecnh nh\u1ecf 15\u2033 ch\u1ec9 c\u00f3 8 \u0111\u01b0\u1eddng d\u1eef li\u1ec7u, m\u1ed9t s\u1ed1 \u0111\u01b0\u1eddng Vcc, m\u1ed9t s\u1ed1 \u0111\u01b0\u1eddng Mass v\u00e0 t\u1ea1o n\u00ean chu\u1ea9n<\/p>\n

c\u00e1p 20 ch\u00e2n.<\/p>\n

\"\"<\/div>\n

C\u00e1p 20 Ch\u00e2n<\/p>\n

\u2013 Tr\u00ean c\u00e1c m\u00e0n h\u00ecnh 17\u2033 ho\u1eb7c m\u00e0n h\u00ecnh Wide th\u00ec c\u00e1c \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u LVDS s\u1ebd \u0111\u1ef1oc nh\u00e2n \u0111\u00f4i do m\u00e0n h\u00ecnh \u0111\u01b0\u1ee3c chia th\u00e0nh hai ph\u1ea7n theo chi\u1ec1u ngang, v\u00ec v\u1eady t\u00edn hi\u1ec7u n\u00e0y c\u00f3 16 \u0111\u01b0\u1eddng, k\u1ebft h\u1ee3p v\u1edbi c\u00e1c \u0111\u01b0\u1eddng Vcc, \u0111\u01b0\u1eddng Mass v\u00e0 ba \u0111\u01b0\u1eddng d\u00e0nh cho ROM tr\u00ean m\u00e0n h\u00ecnh n\u00ean \u0111\u00e3 t\u1ea1o ra chu\u1ea9n c\u00e1p 30 ch\u00e2n.<\/p>\n

\"\"<\/div>\n

C\u00e1p 30 ch\u00e2n<\/p>\n

\"\"<\/div>\n

C\u00e1c \u0111\u00e8n h\u00ecnh c\u00f3 chu\u1ea9n c\u00e1p 30 ch\u00e2n th\u00ec m\u00e0n h\u00ecnh \u0111\u01b0\u1ee3c chia l\u00e0m hai ph\u1ea7n theo chi\u1ec1u ngang th\u00e0nh v\u1ebf tr\u00e1i v\u00e0 v\u1ebf ph\u1ea3i, m\u1ed7i v\u1ebf s\u1ebd do 8 \u0111\u1ebfn 10 \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u LVDS \u0111i\u1ec1u khi\u1ec3n.<\/p>\n

2) C\u00e1c hi\u1ec7n t\u01b0\u1ee3ng h\u01b0 h\u1ecfng gi\u1ed1ng nhau c\u1ee7a Chip gi\u1ea3i m\u00e3 LVDS, C\u00e1p m\u00e0n h\u00ecnh ho\u1eb7c Chip video.<\/p>\n

Th\u1ef1c ra Chip video, c\u00e1p m\u00e0n h\u00ecnh v\u00e0 Chip gi\u1ea3i m\u00e3 LVDS \u0111\u1ec1u l\u00e0 c\u00e1c b\u1ed9 ph\u1eadn m\u1eafc n\u1ed1i ti\u1ebfp nhau \u0111\u1ec3 chuy\u1ec3n t\u1ea3i th\u00f4ng tin t\u1eeb b\u1ed9 nh\u1edb c\u1ee7a<\/p>\n

m\u00e1y t\u00ednh l\u00ean t\u1edbi \u0111\u00e8n h\u00ecnh, v\u00ec v\u1eady h\u01b0 h\u1ecfng \u1edf ba b\u1ed9 ph\u1eadn n\u00e0y th\u01b0\u1eddng s\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng gi\u1ed1ng nhau.<\/p>\n

Sau \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 hi\u1ec7n t\u01b0\u1ee3ng do m\u1ed9t trong ba b\u1ed9 ph\u1eadn g\u00e2y ra l\u00e0: Chip video, C\u00e1p m\u00e0n h\u00ecnh, Chip gi\u1ea3i m\u00e3 LVDS:<\/p>\n

Hi\u1ec7n t\u01b0\u1ee3ng nhi\u1ec5u m\u1ea7u, h\u00ecnh \u1ea3nh nh\u01b0 b\u1ecb lang ben, m\u1ea7u lem nhem.<\/p>\n

\"\"<\/div>\n

Hi\u1ec7n t\u01b0\u1ee3ng h\u00ecnh \u1ea3nh b\u1ecb x\u00e9 v\u1ee5n ra, nh\u00ecnh h\u00ecnh kh\u00f4ng r\u00f5.<\/p>\n

\"\"<\/div>\n

Nhi\u1ec5u m\u1ea7u ho\u1eb7c m\u1ea5t h\u00ecnh tr\u00ean m\u1ed9t n\u1eeda m\u00e0n h\u00ecnh.<\/p>\n

\"\"<\/div>\n

Hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t ho\u00e0n ho\u00e0n h\u00ecnh \u1ea3nh.<\/p>\n

\"\"<\/div>\n

\u1ede 4 hi\u1ec7n t\u01b0\u1ee3ng tr\u00ean c\u00f3 c\u1ea3 nguy\u00ean nh\u00e2n do Chip video, do c\u00e1p m\u00e0n h\u00ecnh v\u00e0 do Chip gi\u1ea3i m\u00e3 LVDS, v\u00ec v\u1eady b\u1ea1n c\u1ea7n c\u00f3 \u0111\u1ed3 \u0111\u1ec3<\/p>\n

ki\u1ec3m tra lo\u1ea1i tr\u1eeb.Ki\u1ec3m tra lo\u1ea1i tr\u1eeb.<\/p>\n

B\u1ea1n h\u00e3y thay th\u1eed m\u1ed9t m\u00e0n h\u00ecnh kh\u00e1c, n\u1ebfu th\u1ea5y h\u1ebft b\u1ec7nh th\u00ec suy ra l\u1ed7i do m\u00e0n h\u00ecnh.<\/p>\n

\u2013 N\u1ebfu do l\u1ed7i m\u00e0n h\u00ecnh => B\u1ea1n h\u00e3y h\u00e0n l\u1ea1i ch\u00e2n chip LVDS.<\/p>\n

\u2013 N\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c th\u00ec b\u1ea1n h\u00e3y thay th\u1eed Chip LVDS.<\/p>\n

N\u1ebfu thay m\u00e0n h\u00ecnh kh\u00e1c v\u1eabn b\u1ecb th\u00ec b\u1ea1n h\u00e3y thay th\u1eed c\u00e1p m\u00e0n h\u00ecnh.<\/p>\n

\u2013 N\u1ebfu thay c\u00e1p m\u00e0n h\u00ecnh m\u00e0 m\u00e1y ch\u1ea1y t\u1ed1t th\u00ec do c\u00e1p m\u00e0n h\u00ecnh.<\/p>\n

\u2013 N\u1ebfu thay c\u00e1p m\u00e0n h\u00ecnh t\u1ed1t m\u00e0 v\u1eabn b\u1ecb th\u00ec do m\u00e1y c\u1ee7a b\u1ea1n b\u1ecb l\u1ed7i Chip Video<\/p>\n

N\u1ebfu \u0111\u00e3 thay th\u1ebf th\u1eed v\u00e0 kh\u1eb3ng \u0111\u1ecbnh l\u00e0 l\u1ed7i kh\u00f4ng thu\u1ed9c v\u1ec1 m\u00e0n h\u00ecnh v\u00e0 c\u00e1p m\u00e0n h\u00ecnh th\u00ec<\/p>\n

suy ra m\u00e1y \u0111ang b\u1ecb h\u1ecfng Chip Video.<\/p>\n

\u2013 B\u1ea1n h\u00e3y h\u00e0n l\u1ea1i Chip Video.<\/p>\n

\u2013 N\u1ebfu kh\u00f4ng h\u1ebft b\u1ec7nh th\u00ec b\u1ea1n c\u1ea7n thay Chip Video m\u1edbi.<\/p>\n

3) C\u00e1c h\u01b0 h\u1ecfng sau \u0111\u00e2y th\u01b0\u1eddng do Chip gi\u1ea3i m\u00e3 LVDS tr\u00ean m\u00e0n h\u00ecnh. Hi\u1ec7n t\u01b0\u1ee3ng m\u00e0n h\u00ecnh ch\u1ec9 c\u00f2n to\u00e0n v\u1ec7t d\u1ecdc xanh \u0111\u1ecf kh\u1eafp m\u00e0n h\u00ecnh.<\/p>\n

\"\"<\/div>\n

Hi\u1ec7n t\u01b0\u1ee3ng \u00e2m \u1ea3nh, ng\u01b0\u1ee3c m\u00e0u s\u1eafc, \u0111en th\u00e0nh tr\u1eafng.<\/p>\n

\"\"<\/div>\n

4) C\u00e1c h\u01b0 h\u1ecfng sau \u0111\u00e2y th\u01b0\u1eddng do \u0111\u1ee9t c\u00e1p ph\u00eda sau Chip gi\u1ea3i m\u00e3 LVDS v\u1ec1 ph\u00eda \u0111\u00e8n h\u00ecnh v\u00e0 \u0111\u1ee9t v\u1ec1 ph\u00eda tr\u01b0\u1edbc<\/p>\n

c\u00e1c IC \u2013 V.Drive ho\u1eb7c h\u1ecfng c\u00e1c IC \u2013 V.Drive ho\u1eb7c H.Drive Hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t m\u1ed9t ph\u1ea7n h\u00ecnh \u1ea3nh, m\u1ed9t ph\u1ea7n kh\u00e1c v\u1eabn c\u00f3 h\u00ecnh r\u00f5 n\u00e9t.<\/p>\n

\"\"\"\"<\/div>\n
<\/div>\n
<\/div>\n
<\/div>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

M\u1ea1ch ch\u1ebft m\u1ea1ch qu\u00e9t d\u1ecdc v\u00e0 qu\u00e9t ngang<\/p>\n

Ph\u00e2n t\u00edch:<\/p>\n

\u2013 Ch\u1ec9 c\u1ea7n m\u1ed9t ph\u1ea7n ngang tr\u00ean m\u00e0n h\u00ecnh v\u1eabn c\u00f3 h\u00ecnh \u1ea3nh r\u00f5 n\u00e9t, \u0111i\u1ec1u n\u00e0y ch\u1ee9ng t\u1ecf Chip Video \u0111\u00e3 t\u1ed1t, c\u00e1p m\u00e0n h\u00ecnh \u0111\u00e3 t\u1ed1t<\/p>\n

v\u00e0 Chip gi\u1ea3i m\u00e3 LVDS \u0111\u00e3 t\u1ed1t.<\/p>\n

\u2013 H\u01b0 h\u1ecfng thu\u1ed9c v\u1ec1 m\u1ea1ch in \u0111\u01b0a t\u00edn hi\u1ec7u ra \u0111\u1ebfn c\u00e1c IC \u2013 V.Drive \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n c\u00e1c h\u00e0ng ngang m\u00e0n h\u00ecnh.<\/p>\n

III \u2013 ROM BIOS tr\u00ean m\u00e0n h\u00ecnh.<\/p>\n

\u00dd ngh\u0129a c\u1ee7a ROM \u1edf tr\u00ean m\u00e0n h\u00ecnh.<\/p>\n

\u2013 ROM \u1edf tr\u00ean m\u00e0n h\u00ecnh cung c\u1ea5p c\u00e1c th\u00f4ng tin c\u1ee7a m\u00e0n h\u00ecnh nh\u01b0 \u0111\u1ed9 ph\u00e2n gi\u1ea3i, \u0111i\u1ec7n \u00e1p nu\u00f4i\u2026<\/p>\n

\u2013 ROM ch\u1ec9 c\u00f3 tr\u00ean c\u00e1c m\u00e0n h\u00ecnh Wide ho\u1eb7c m\u00e0n h\u00ecnh r\u1ed9ng v\u00e0 c\u00f3 chu\u1ea9n c\u00e1p 30 ch\u00e2n ho\u1eb7c 40 ch\u00e2n.<\/p>\n

ROM kh\u00f4ng c\u00f3 tr\u00ean c\u00e1c m\u00e0n h\u00ecnh 15\u2033 ho\u1eb7c d\u00f9ng chu\u1ea9n c\u00e1p 20 ch\u00e2n.<\/p>\n

\"\"<\/div>\n

Rom<\/p>\n

ROM tr\u00ean m\u00e0n h\u00ecnh ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o ?<\/p>\n

\u2013 Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c m\u00e1y Laptop \u0111\u1ec1u c\u1ea7n \u0111\u1ebfn ROM c\u1ee7a m\u00e0n h\u00ecnh, c\u00e1c m\u00e1y Laptop kh\u00f4ng c\u1ea7n \u0111\u1ebfn ROM c\u1ee7a m\u00e0n h\u00ecnh th\u00ec<\/p>\n

Nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e3 thi\u1ebft l\u1eadp cho Chip Video \u0111\u01b0a ra m\u1ed9t \u0111\u1ed9 ph\u00e2n gi\u1ea3i m\u1eb7c \u0111\u1ecbnh.<\/p>\n

\u2013 N\u1ebfu m\u00e0n h\u00ecnh c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i tr\u00f9ng v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u1ee7a Chip video \u0111\u01b0a ra m\u1eb7c \u0111\u1ecbnh th\u00ec m\u00e1y cho h\u1ec9nh \u1ea3nh \u0111\u1eb9p v\u00e0 c\u00e2n \u0111\u1ed1i.<\/p>\n

\u2013 N\u1ebfu m\u00e0n h\u00ecnh c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i kh\u00f4ng \u0111\u00fang v\u1edbi \u0111\u1ed9 ph\u00e2 gi\u1ea3i m\u00e0 Chip video \u0111\u01b0a ra th\u00ec \u1ea3nh b\u1ecb s\u1ea5u v\u00e0 l\u1ec7ch h\u00ecnh, m\u00e9o h\u00ecnh\u2026<\/p>\n

C\u00e1c m\u00e1y Laptop c\u1ea7n \u0111\u1ebfn ROM c\u1ee7a m\u00e0n h\u00ecnh th\u00ec b\u1eaft bu\u1ed9c ph\u1ea3i c\u00f3 ROM tr\u00ean m\u00e0n h\u00ecnh, Chip video m\u1edbi ho\u1ea1t \u0111\u1ed9ng.<\/p>\n

\u2013 Trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng, ROM tr\u00ean m\u00e0n h\u00ecnh \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n tr\u01b0\u1edbc \u0111\u1ec3 n\u00f3 ho\u1ea1t \u0111\u1ed9ng, sau \u0111\u00f3 n\u00f3 s\u1ebd truy\u1ec1n c\u00e1c th\u00f4ng<\/p>\n

tin c\u1ee7a m\u00e0n h\u00ecnh v\u1ec1 Chip Video.<\/p>\n

\u2013 Chip video nh\u1eadn \u0111\u01b0\u1ee3c c\u00e1c th\u00f4ng tin tr\u00ean m\u1edbi \u0111i\u1ec1u khi\u1ec3n b\u1eadt ngu\u1ed3n Vcc cung c\u1ea5p cho m\u00e0n h\u00ecnh, b\u1eadt cho cao \u00e1p s\u00e1ng, \u0111\u1ed3ng<\/p>\n

th\u1eddi t\u1ef1 \u0111\u1ed9ng thi\u1ebft l\u1eadp cho t\u00edn hi\u1ec7u xu\u1ea5t ra m\u00e0n h\u00ecnh c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i b\u1eb1ng v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u1ee7a m\u00e0n h\u00ecnh.<\/p>\n

\u2013 Tr\u00ean c\u00e1c m\u00e1y Laptop c\u1ea7n \u0111\u1ebfn s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a ROM tr\u00ean m\u00e0n h\u00ecnh, trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p l\u1ed7i ti\u1ebfp x\u00fac c\u1ee7a c\u00e1p m\u00e0n h\u00ecnh ho\u1eb7c<\/p>\n

h\u1ecfng ROM tr\u00ean m\u00e0n h\u00ecnh th\u00ec c\u00e1c m\u00e1y \u0111\u00f3 s\u1ebd kh\u00f4ng cho hi\u1ec3n th\u1ecb h\u00ecnh \u1ea3nh, kh\u00f4ng b\u1eadt s\u00e1ng cao \u00e1p.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

M\u00e0n LCDTr\u00ean c\u00e1c lo\u1ea1i m\u00e0n h\u00ecnh LCD th\u01b0\u1eddng c\u00f3 c\u00e1c lo\u1ea1i m\u1ea1ch \u0111i\u1ec7n ch\u00ednh sau \u0111\u00e2y. M\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u00e1p cho m\u00e0n h\u00ecnh. IC gi\u1ea3i m\u00e3 t\u00edn hi\u1ec7u LVDS v\u00e0 \u0111i\u1ec1u khi\u1ec3n qu\u00e9t. Ngo\u00e0i ra tr\u00ean c\u00e1c m\u00e0n h\u00ecnh Wide ho\u1eb7c m\u00e0n h\u00ecnh c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao th\u00ec th\u01b0\u1eddng c\u00f3 m\u1ed9t ROM BIOS […]<\/p>\n","protected":false},"author":3,"featured_media":9780,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[515,514],"tags":[],"class_list":["post-9779","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-laptop","category-sua-chua"],"_links":{"self":[{"href":"https:\/\/tct.vn\/blog\/wp-json\/wp\/v2\/posts\/9779","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tct.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tct.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tct.vn\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/tct.vn\/blog\/wp-json\/wp\/v2\/comments?post=9779"}],"version-history":[{"count":8,"href":"https:\/\/tct.vn\/blog\/wp-json\/wp\/v2\/posts\/9779\/revisions"}],"predecessor-version":[{"id":9819,"href":"https:\/\/tct.vn\/blog\/wp-json\/wp\/v2\/posts\/9779\/revisions\/9819"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tct.vn\/blog\/wp-json\/wp\/v2\/media\/9780"}],"wp:attachment":[{"href":"https:\/\/tct.vn\/blog\/wp-json\/wp\/v2\/media?parent=9779"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tct.vn\/blog\/wp-json\/wp\/v2\/categories?post=9779"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tct.vn\/blog\/wp-json\/wp\/v2\/tags?post=9779"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}