{"id":835,"date":"2025-10-21T13:15:29","date_gmt":"2025-10-21T06:15:29","guid":{"rendered":"http:\/\/trungpro.com.vn\/wordpress\/?p=835"},"modified":"2025-10-21T13:15:34","modified_gmt":"2025-10-21T06:15:34","slug":"nhung-loi-thuong-gap-khi-sua-mach-dien-tu-cach-khac-phuc-hieu-qua","status":"publish","type":"post","link":"https:\/\/trungpro.com.vn\/wordpress\/nhung-loi-thuong-gap-khi-sua-mach-dien-tu-cach-khac-phuc-hieu-qua\/","title":{"rendered":"Nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi s\u1eeda m\u1ea1ch \u0111i\u1ec7n t\u1eed \u2013 C\u00e1ch kh\u1eafc ph\u1ee5c hi\u1ec7u qu\u1ea3"},"content":{"rendered":"\n

Gi\u1edbi thi\u1ec7u<\/strong><\/p>\n\n\n\n

S\u1eeda ch\u1eefa m\u1ea1ch \u0111i\u1ec7n t\u1eed l\u00e0 c\u00f4ng vi\u1ec7c \u0111\u00f2i h\u1ecfi s\u1ef1 t\u1ec9 m\u1ec9, ki\u1ebfn th\u1ee9c chuy\u00ean m\u00f4n v\u00e0 kinh nghi\u1ec7m th\u1ef1c t\u1ebf. Tuy nhi\u00ean, ngay c\u1ea3 nh\u1eefng ng\u01b0\u1eddi c\u00f3 tay ngh\u1ec1 c\u0169ng d\u1ec5 m\u1eafc ph\u1ea3i nh\u1eefng l\u1ed7i c\u01a1 b\u1ea3n khi\u1ebfn m\u1ea1ch kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang ho\u1eb7c g\u00e2y h\u01b0 h\u1ea1i linh ki\u1ec7n. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd t\u1ed5ng h\u1ee3p nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi s\u1eeda m\u1ea1ch \u0111i\u1ec7n t\u1eed v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c \u0111\u1ec3 gi\u00fap b\u1ea1n tr\u00e1nh r\u1ee7i ro, ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 chi ph\u00ed.<\/p>\n\n\n\n

\"Nh\u1eefng
Nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi s\u1eeda m\u1ea1ch \u0111i\u1ec7n t\u1eed \u2013 C\u00e1ch kh\u1eafc ph\u1ee5c hi\u1ec7u qu\u1ea3<\/em><\/figcaption><\/figure>\n\n\n\n

1. Kh\u00f4ng ki\u1ec3m tra k\u1ef9 tr\u01b0\u1edbc khi c\u1ea5p ngu\u1ed3n<\/strong><\/p>\n\n\n\n

M\u1ed9t trong nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 c\u1ea5p \u0111i\u1ec7n ngay sau khi thay linh ki\u1ec7n ho\u1eb7c h\u00e0n xong m\u1ea1ch. Vi\u1ec7c n\u00e0y c\u00f3 th\u1ec3 khi\u1ebfn m\u1ea1ch b\u1ecb ch\u1eadp, n\u1ed5 linh ki\u1ec7n ho\u1eb7c ch\u00e1y bo m\u1ea1ch n\u1ebfu c\u00f2n l\u1ed7i \u1ea9n.<\/p>\n\n\n\n

C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n

    \n
  • D\u00f9ng \u0111\u1ed3ng h\u1ed3 \u0111o \u0111i\u1ec7n tr\u1edf \u0111\u1ec3 ki\u1ec3m tra c\u00e1c \u0111i\u1ec3m ngu\u1ed3n tr\u01b0\u1edbc khi c\u1ea5p \u0111i\u1ec7n.<\/li>\n\n\n\n
  • S\u1eed d\u1ee5ng b\u00f3ng \u0111\u00e8n b\u1ea3o v\u1ec7 ho\u1eb7c ngu\u1ed3n d\u00f2ng h\u1ea1n ch\u1ebf (current limit) \u0111\u1ec3 tr\u00e1nh h\u1ecfng m\u1ea1ch.<\/li>\n\n\n\n
  • Ki\u1ec3m tra c\u1ef1c t\u00ednh linh ki\u1ec7n (t\u1ee5 \u0111i\u1ec7n, diode, transistor) tr\u01b0\u1edbc khi b\u1eadt ngu\u1ed3n.<\/li>\n<\/ul>\n\n\n\n

    2. L\u1eafp sai c\u1ef1c linh ki\u1ec7n<\/strong><\/p>\n\n\n\n

    T\u1ee5 h\u00f3a, diode, transistor, IC\u2026 \u0111\u1ec1u c\u00f3 c\u1ef1c t\u00ednh r\u00f5 r\u00e0ng. N\u1ebfu l\u1eafp ng\u01b0\u1ee3c, m\u1ea1ch kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng v\u00e0 th\u1eadm ch\u00ed ch\u00e1y linh ki\u1ec7n ngay l\u1eadp t\u1ee9c.<\/p>\n\n\n\n

    C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n

      \n
    • Quan s\u00e1t k\u1ef9 k\u00fd hi\u1ec7u tr\u00ean m\u1ea1ch in (PCB) v\u00e0 tr\u00ean linh ki\u1ec7n.<\/li>\n\n\n\n
    • Tra datasheet c\u1ee7a linh ki\u1ec7n n\u1ebfu kh\u00f4ng ch\u1eafc ch\u1eafn v\u1ec1 ch\u00e2n.<\/li>\n\n\n\n
    • Khi thay IC, ch\u00fa \u00fd chi\u1ec1u r\u00e3nh \u0111\u1ecbnh v\u1ecb ho\u1eb7c ch\u1ea5m tr\u00f2n (ch\u00e2n 1).<\/li>\n<\/ul>\n\n\n\n

      3. H\u00e0n m\u1ea1ch kh\u00f4ng \u0111\u00fang k\u1ef9 thu\u1eadt<\/strong><\/p>\n\n\n\n

      H\u00e0n qu\u00e1 l\u00e2u, d\u00f9ng nhi\u1ec7t \u0111\u1ed9 cao ho\u1eb7c \u0111\u1ec3 m\u1ed1i h\u00e0n ngu\u1ed9i kh\u00f4ng \u0111\u1ec1u l\u00e0 nguy\u00ean nh\u00e2n d\u1eabn \u0111\u1ebfn ch\u1eadp m\u1ea1ch, bong pad ho\u1eb7c ti\u1ebfp x\u00fac k\u00e9m.<\/p>\n\n\n\n

      C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n

        \n
      • S\u1eed d\u1ee5ng m\u1ecf h\u00e0n c\u00f3 \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 (t\u1eeb 300\u2013350\u00b0C).<\/li>\n\n\n\n
      • D\u00f9ng thi\u1ebfc ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t, c\u00f3 ch\u1ee9a flux \u0111\u1ec3 t\u0103ng \u0111\u1ed9 b\u00e1m.<\/li>\n\n\n\n
      • V\u1ec7 sinh \u0111\u1ea7u h\u00e0n th\u01b0\u1eddng xuy\u00ean, tr\u00e1nh d\u00ednh c\u1eb7n oxy h\u00f3a.<\/li>\n<\/ul>\n\n\n\n

        4. Kh\u00f4ng ki\u1ec3m tra linh ki\u1ec7n tr\u01b0\u1edbc khi thay th\u1ebf<\/strong><\/p>\n\n\n\n

        Nhi\u1ec1u ng\u01b0\u1eddi v\u1ed9i v\u00e0ng thay linh ki\u1ec7n m\u00e0 kh\u00f4ng ki\u1ec3m tra nguy\u00ean nh\u00e2n th\u1ef1c s\u1ef1, d\u1eabn \u0111\u1ebfn thay sai linh ki\u1ec7n ho\u1eb7c b\u1ecf s\u00f3t l\u1ed7i kh\u00e1c trong m\u1ea1ch.<\/p>\n\n\n\n

        C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n

          \n
        • \u0110o ki\u1ec3m linh ki\u1ec7n b\u1eb1ng \u0111\u1ed3ng h\u1ed3 VOM ho\u1eb7c LCR meter tr\u01b0\u1edbc khi thay.<\/li>\n\n\n\n
        • Ki\u1ec3m tra ngu\u1ed3n c\u1ea5p, t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n, m\u1ea1ch h\u1ed3i ti\u1ebfp li\u00ean quan.<\/li>\n\n\n\n
        • \u0110\u1ecdc s\u01a1 \u0111\u1ed3 m\u1ea1ch (n\u1ebfu c\u00f3) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh vai tr\u00f2 c\u1ee7a linh ki\u1ec7n trong to\u00e0n h\u1ec7 th\u1ed1ng.<\/li>\n<\/ul>\n\n\n\n

          5. Kh\u00f4ng s\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 \u0111o ki\u1ec3m \u0111\u00fang c\u00e1ch<\/strong><\/p>\n\n\n\n

          M\u1ed9t l\u1ed7i th\u01b0\u1eddng g\u1eb7p l\u00e0 \u0111o khi m\u1ea1ch \u0111ang c\u1ea5p \u0111i\u1ec7n kh\u00f4ng \u0111\u00fang thang \u0111o, d\u1eabn \u0111\u1ebfn h\u1ecfng \u0111\u1ed3ng h\u1ed3 ho\u1eb7c sai k\u1ebft qu\u1ea3.<\/p>\n\n\n\n

          C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n

            \n
          • Ch\u1ec9 \u0111o \u0111i\u1ec7n tr\u1edf, diode, t\u1ee5 \u0111i\u1ec7n\u2026 khi m\u1ea1ch kh\u00f4ng c\u00f2n \u0111i\u1ec7n \u00e1p.<\/li>\n\n\n\n
          • Khi \u0111o \u0111i\u1ec7n \u00e1p, \u0111\u1eb7t thang DC ho\u1eb7c AC \u0111\u00fang lo\u1ea1i ngu\u1ed3n.<\/li>\n\n\n\n
          • D\u00f9ng oscilloscope n\u1ebfu c\u1ea7n ki\u1ec3m tra t\u00edn hi\u1ec7u dao \u0111\u1ed9ng, xung, ho\u1eb7c nhi\u1ec5u.<\/li>\n<\/ul>\n\n\n\n

            6. B\u1ecf qua vi\u1ec7c v\u1ec7 sinh m\u1ea1ch sau khi s\u1eeda<\/strong><\/p>\n\n\n\n

            Sau khi h\u00e0n, n\u1ebfu kh\u00f4ng v\u1ec7 sinh flux ho\u1eb7c thi\u1ebfc th\u1eeba, m\u1ea1ch d\u1ec5 b\u1ecb \u1ea9m, r\u00f2 \u0111i\u1ec7n ho\u1eb7c oxy h\u00f3a g\u00e2y ch\u1eadp ng\u1ea7m.<\/p>\n\n\n\n

            C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n

              \n
            • D\u00f9ng c\u1ed3n isopropyl (IPA) ho\u1eb7c dung d\u1ecbch chuy\u00ean d\u1ee5ng \u0111\u1ec3 r\u1eeda m\u1ea1ch.<\/li>\n\n\n\n
            • Lau kh\u00f4 b\u1eb1ng b\u00e0n ch\u1ea3i m\u1ec1m v\u00e0 kh\u00ed n\u00e9n.<\/li>\n\n\n\n
            • Tr\u00e1nh d\u00f9ng dung m\u00f4i m\u1ea1nh l\u00e0m bong l\u1edbp ph\u1ee7 ch\u1ed1ng oxy h\u00f3a c\u1ee7a m\u1ea1ch.<\/li>\n<\/ul>\n\n\n\n

              7. Kh\u00f4ng ki\u1ec3m tra l\u1ea1i sau khi s\u1eeda xong<\/strong><\/p>\n\n\n\n

              Nhi\u1ec1u ng\u01b0\u1eddi ch\u1ee7 quan, kh\u00f4ng ki\u1ec3m tra \u0111\u1ea7y \u0111\u1ee7 t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o \u2013 \u0111\u1ea7u ra, d\u1eabn \u0111\u1ebfn s\u1ea3n ph\u1ea9m sau khi giao v\u1eabn g\u1eb7p l\u1ed7i.<\/p>\n\n\n\n

              C\u00e1ch kh\u1eafc ph\u1ee5c:<\/p>\n\n\n\n

                \n
              • Sau khi s\u1eeda, ki\u1ec3m tra l\u1ea1i to\u00e0n b\u1ed9 ch\u1ee9c n\u0103ng c\u1ee7a m\u1ea1ch.<\/li>\n\n\n\n
              • So s\u00e1nh t\u00edn hi\u1ec7u v\u1edbi m\u1ea1ch chu\u1ea9n ho\u1eb7c datasheet.<\/li>\n\n\n\n
              • Ghi ch\u00fa l\u1ea1i k\u1ebft qu\u1ea3 \u0111\u1ec3 d\u1ec5 d\u00e0ng theo d\u00f5i l\u1ea7n s\u1eeda sau.<\/li>\n<\/ul>\n\n\n\n

                K\u1ebft lu\u1eadn<\/strong><\/p>\n\n\n\n

                S\u1eeda ch\u1eefa m\u1ea1ch \u0111i\u1ec7n t\u1eed kh\u00f4ng ch\u1ec9 l\u00e0 thay linh ki\u1ec7n m\u00e0 c\u00f2n l\u00e0 qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch, \u0111o ki\u1ec3m v\u00e0 x\u1eed l\u00fd l\u1ed7i c\u00f3 h\u1ec7 th\u1ed1ng. Vi\u1ec7c n\u1eafm r\u00f5 nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch ph\u00f2ng tr\u00e1nh s\u1ebd gi\u00fap b\u1ea1n l\u00e0m vi\u1ec7c hi\u1ec7u qu\u1ea3, tr\u00e1nh h\u01b0 h\u1ea1i m\u1ea1ch v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed \u0111\u00e1ng k\u1ec3.<\/p>\n\n\n\n

                FAQ \u2013 C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/strong><\/p>\n\n\n\n

                1. L\u00e0m sao \u0111\u1ec3 tr\u00e1nh h\u01b0 linh ki\u1ec7n khi m\u1edbi b\u1eaft \u0111\u1ea7u h\u1ecdc s\u1eeda m\u1ea1ch \u0111i\u1ec7n t\u1eed?<\/p>\n\n\n\n

                \u2192 H\u00e3y lu\u00f4n d\u00f9ng ngu\u1ed3n c\u00f3 gi\u1edbi h\u1ea1n d\u00f2ng v\u00e0 ki\u1ec3m tra k\u1ef9 c\u1ef1c t\u00ednh linh ki\u1ec7n tr\u01b0\u1edbc khi c\u1ea5p \u0111i\u1ec7n.<\/p>\n\n\n\n

                2. C\u00f3 c\u1ea7n thi\u1ebft ph\u1ea3i v\u1ec7 sinh bo m\u1ea1ch sau khi h\u00e0n kh\u00f4ng?<\/p>\n\n\n\n

                \u2192 C\u00f3, v\u00ec c\u1eb7n flux ho\u1eb7c b\u1ee5i thi\u1ebfc c\u00f3 th\u1ec3 g\u00e2y r\u00f2 \u0111i\u1ec7n v\u00e0 l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd m\u1ea1ch.<\/p>\n\n\n\n

                3. Mua d\u1ee5ng c\u1ee5 s\u1eeda m\u1ea1ch \u1edf \u0111\u00e2u uy t\u00edn?<\/p>\n\n\n\n

                \u2192 B\u1ea1n n\u00ean ch\u1ecdn c\u00e1c c\u1eeda h\u00e0ng \u0111i\u1ec7n t\u1eed chuy\u00ean nghi\u1ec7p ho\u1eb7c trang th\u01b0\u01a1ng m\u1ea1i l\u1edbn nh\u01b0 \u0110i\u1ec7n T\u1eed 360, Nh\u1eadt T\u1ea3o, Tiki, Shopee Mall ch\u00ednh h\u00e3ng.<\/p>\n\n\n\n

                4. M\u1ea1ch \u0111i\u1ec7n t\u1eed b\u1ecb ch\u00e1y IC th\u01b0\u1eddng do nguy\u00ean nh\u00e2n g\u00ec?<\/p>\n\n\n\n

                \u2192 Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn l\u00e0 ngu\u1ed3n qu\u00e1 \u00e1p, l\u1eafp ng\u01b0\u1ee3c c\u1ef1c ho\u1eb7c ch\u1eadp t\u1ea3i \u0111\u1ea7u ra.<\/p>\n\n\n\n

                T\u1eeb kh\u00f3a SEO g\u1ee3i \u00fd:<\/strong><\/p>\n\n\n\n

                  \n
                • L\u1ed7i th\u01b0\u1eddng g\u1eb7p khi s\u1eeda m\u1ea1ch \u0111i\u1ec7n t\u1eed<\/li>\n\n\n\n
                • C\u00e1ch s\u1eeda m\u1ea1ch \u0111i\u1ec7n t\u1eed b\u1ecb h\u01b0<\/li>\n\n\n\n
                • Sai l\u1ea7m khi h\u00e0n linh ki\u1ec7n \u0111i\u1ec7n t\u1eed<\/li>\n\n\n\n
                • Kinh nghi\u1ec7m s\u1eeda m\u1ea1ch cho ng\u01b0\u1eddi m\u1edbi<\/li>\n\n\n\n
                • H\u01b0\u1edbng d\u1eabn ki\u1ec3m tra m\u1ea1ch \u0111i\u1ec7n t\u1eed<\/li>\n<\/ul>\n\n\n\n

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

                  S\u1eeda ch\u1eefa m\u1ea1ch \u0111i\u1ec7n t\u1eed l\u00e0 c\u00f4ng vi\u1ec7c \u0111\u00f2i h\u1ecfi s\u1ef1 t\u1ec9 m\u1ec9, ki\u1ebfn th\u1ee9c chuy\u00ean m\u00f4n v\u00e0 kinh nghi\u1ec7m th\u1ef1c t\u1ebf. Tuy nhi\u00ean, ngay c\u1ea3 nh\u1eefng ng\u01b0\u1eddi c\u00f3 tay ngh\u1ec1 c\u0169ng d\u1ec5 m\u1eafc ph\u1ea3i nh\u1eefng l\u1ed7i c\u01a1 b\u1ea3n khi\u1ebfn m\u1ea1ch kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang ho\u1eb7c g\u00e2y h\u01b0 h\u1ea1i linh ki\u1ec7n. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd t\u1ed5ng h\u1ee3p nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi s\u1eeda m\u1ea1ch \u0111i\u1ec7n t\u1eed v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c \u0111\u1ec3 gi\u00fap b\u1ea1n tr\u00e1nh r\u1ee7i ro, ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 chi ph\u00ed.<\/p>\n","protected":false},"author":1,"featured_media":836,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[92],"tags":[352,353,350,351],"class_list":["post-835","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-review","tag-cach-khac-phuc","tag-khac-phuc-loi-mach","tag-loi-khi-sua-mach","tag-mach-dien-tu"],"yoast_head":"\nNh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi s\u1eeda m\u1ea1ch \u0111i\u1ec7n t\u1eed \u2013 C\u00e1ch kh\u1eafc ph\u1ee5c hi\u1ec7u qu\u1ea3 - TrungPro.com.vn<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/trungpro.com.vn\/wordpress\/nhung-loi-thuong-gap-khi-sua-mach-dien-tu-cach-khac-phuc-hieu-qua\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi s\u1eeda m\u1ea1ch \u0111i\u1ec7n t\u1eed \u2013 C\u00e1ch kh\u1eafc ph\u1ee5c hi\u1ec7u qu\u1ea3 - TrungPro.com.vn\" \/>\n<meta property=\"og:description\" content=\"S\u1eeda ch\u1eefa m\u1ea1ch \u0111i\u1ec7n t\u1eed l\u00e0 c\u00f4ng vi\u1ec7c \u0111\u00f2i h\u1ecfi s\u1ef1 t\u1ec9 m\u1ec9, ki\u1ebfn th\u1ee9c chuy\u00ean m\u00f4n v\u00e0 kinh nghi\u1ec7m th\u1ef1c t\u1ebf. 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