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Tntifng Trung CdJJ Ng/d Ky Tlmqt Cong Ngh? Hr'mg Vit<tng
Bai 13:
THAY THE BOAR M4CH
MA y DIED HOA KHONG KHi
I, Cac hi¢n tu\ing hu hong.
1, EJi:tt cdu chi.
Khoa: Ky Thulj,t Lq,nh
Tht!'cJng do linh ki~n bao v~ qua ap bi chg.m, cu9n day so ca'p bie°n ap ngu6n bi chg.m I s6 vong day qmfo, chg.m diode n.ln dit%n, chg.m C E cua transistor.
2, Khong khdi d9ng dur;1c qug,t dim lg,nh.
Ki€m tra 3 di€u ki~n d€ board mg.ch di vao hog.t d9ng. Ngu6n cung ca'p cho IC di€u khi€n, mg.ch dao dong tg.o xung d6ng h6, mg.ch autoreset.
3, Bdm nut auto con tcic d1:mg, con remote mat tcic dl!,ng.
Ki~m !ra mg.ch remote, kiim tra milt thu b~ng each dung d6ng h6 VOM d€ do.
4, Hong remote.
H6ng tli4ch anh, hong led phat h◊ng ngo4i, mg.ch in bi dut, bid do nuoc pin.
5, Ddn l~mhkiicJng ct6ng difn xu611,g dim nr5ng.
Ki6ni tra m.:tch trl hoan thoi gian, m.:tch ti,t dong 6n dinh nhi~t do trong phong
(tlutoug do cam bie"n nhit%t do phongbi du't).
II, Phuong pha p thay the'.
Khi plia t hit%n hu hong nen su'a chua board cu vl n6 lien quan de'n cac chan va cac r.ic dm. Ne"u truong h<;f p hong qua n~ng khong th~ sil'a chua du'<;f c thl phai thay b~ng board m;:i.ch mtfi.
Chu y kbi thay board mg.ch moi:
- Tlm board mg.ch moi cung chung loc_1i la t6t nha't.
- Ch911 board mg.ch moi phu h9p vdi khong gian, vi tri cua board mg.ch cu~ ne'u board moi khac chung log.i
- Ncfo board mg.ch moi khac chung lo.:ti thl chu y chan R - S cua dong co quQ.t phai khop Y<Ji chan board va tl;l dit%n YI cac d~u day d9ng co qug.t phai da'u voi rife dm dia board mg.ch moi.