2024年11月25日
数控彩电I2C总线故障的分类与检修
????????I2C×?????????·??à???ì??
I2??×???????·?????????×?????·????????????°??±??÷?????ú?ú?§????·????????????????????????·???????÷?????·???????ü???????????????????????????·?????°????·????ù?????¨?????????????????·?????????ì??????I2C×??????????????±????±????ì??I2C×???×??í?????±??????°á???¨???????????ì??·?·¨????????????????I2C×??????????ó???é????????????????·????????ì?????????í??·???×????ì??????????±???°????????ó??·?????????????I2C×?????????×??ì?????????????ú????????????????×??ì??????????·????????ù??????????????·?????????????????????????????±¨??×??ì?á?????????????????á????????·???,???¤??NC??6??????F5DW?ú?????????ò???????????ú????????????I2C×??????????????????????ì??·?·¨???????í??????????????????±???????????????????????±¨??×??ì?á???????????????ù?ù??????I2C×???±??¤?????????????????????ì??????I2C×????????±±???????????????????·??à?é??????????I2C×??????????ú?ú???ò???ì??·?·¨????????????????????I2C×????????????????¨?ò???????§?????????¤?°×?·??????ù±????????????????????????????????????????ó?????????????????÷?????
???·?CPU??????I2C×??????????????é?¨?ò×é?????????????????????????????????????????í???????????????????ú?÷???á???????????????????±???????????¨???????????ì??·?·¨???·?????·?????????????????á???????????ò???ì?????¤?ù±?????????I2C×????????????????±????°???±?×??°???í?ó???±?????ò???×???ì?é?í???è????·?????????·?·¨?????÷??I2C×??????????è?????????ì?é?????????????í????????·???±?????????±????ò?????÷???????ó??°?????????????????????±???????????·ù?ì?????í???§????????????????????±??í???????????????????????????ú?÷??????????????±??????±??±??ì?????????????????????????ò????????·??????÷????????????????????????·???±¨??×??ì?á??????????????????????I2C×?????×??ì??????·???????????I2C×??????·????????????·???×??ì?±?????????????????ú???¨??·?????G88AA?ú?????????ò????±ê???¨???¤??NC??6??????F5DW?ú???????????ò???÷??????????????I2C×????§?·?°?????????·??????·????·??????·??????????????ò??????????I2C×????§?·?ò?????????????????·????I2C×??????????·?ò?á?????????????????????????ú???ò????±ê?????ò±í??????????I2C×??????·?????????????????·?????±??°????
?·?·¨?ù???é??????????????????????????????±¨??×??ì?á????????????????°????±???ì?éI2C×??????·?????????????????·????????I2C×????????????????·?????±???ú?÷?????á????×??ì?????????á×?±??????±???????ì?é??????I2C×????§?·?°???????????????????·??????????1??????2140???????????????????ì?????????ú?????????????ì?????????????????????ì???±?????é?????????????????ò???ì?é???????????????????÷?÷????±ú???????¨???ê??????????????????????????????×ù???????????????????????????????????????ò??±íR??10k??????×è??????·???????????????????×ù?????????????????????¨???????¤?§?÷???????ù????×????÷?????????????÷???????????????ú?????????????????????÷?÷????±ú???????¨????????×????é???????ì???????????ò??×??????ì??·??????¤?????????±???????ì?????÷???????÷???ú°×?????÷???????????¤????????·????ó????????°×?????÷?????°?????ú?÷????AV×?????????????·????÷????????·??????ì??·???Q351?ù??????±???±ê????0?±1V?????÷??????????·?°??????¤???????·???ò°×?????÷?????±?ù???????ú?÷?¤??10·????????ó???±°????ú?????????°???±?ü???????÷?????°?????¨?????±?ü?????????ú
????????×???????°??°?¨?±?±?ü???ú?÷????°×?????÷??×??????ì?é·???R????±ê????×ó????????????G????B???ò?????????????±°?R????±ê?÷??×ó????????????G????B????±ê?????±?????????ó???ù???á????·??????é????B????G????±ê?÷??×ó?????ù????R????±ê?÷??×ó?????????????????????÷??250V?±????°???????×???×?????×??ó??°??????÷?????°N?±?ü?????????????×??????????????2?????¨·?????????°??¨G88AA?ú????????????????????×ó?????ù???ù???ù?????????ú°é?????·?÷???????????????÷???·7112?¨TBA120U????TV/AV×??????·7503?¨HEF4052?????????????°?????·7628?¨UPC1853???????????????????·7679?¨PCF8574???°??·????·7670?¨TDA8218AII??×é?????????????????????????í??????????·????·????????°é?????????????????¨?÷1110??1107??1117??1120?????ó??????7112{14}??????7112??????·??ó?ì?¨?ó??????8????????????????????TV/AV×??????·?????úTV/AV×??????·????1?ù??????????????????????????75031??{12}??4??{11}??5??{14}?????÷???ì?¨??????????????????75032??{15}?????????·??????????750310??9?????????????????????????????????ó????????????75033??{13}????????????7628{26}??{27}??????7628?°7679?
?7681??7685×÷???????????????????????????°?????ó????????7670×÷????·??ó?????????ù?÷·??ù?????????????·???????±??×???????????????°é?????ù?????··???????????7269???ó?????????·??×ó?????ù??·??????????????????¨?????????á???????ù???ù???ù?????????????????·×ó?????ù?????????í???????????ú×????á???????????????????????·×ó?????ù?????????¤×÷????????1)???·±??í?°??????????????????????2??I2C?????°????×?????????????3?????????·????×÷???í???????????ú??·???????AV???????í??·???????×??ì???????ò?????ì????????????????°é???????±???????ù??????AV?????±°é?????????°????×??ì?á??????·?????·??§???????ì???±????????AV2??×????????????á????°é???????÷?????????ó???ò???ú?÷?ó????°????????ü?????ú?÷????×??ì×?????·????????????°ERR07?±×??ù?????÷7679???í???????ó??7679?????????????÷?????ü???í??·??á??????°é?????ò??????????·??????··?????????TV/AV???·??×???????????7679??????????75039??10????????·?????????TV×???????AV×????????±????0V?????????¨???????ò??7679???í??????7679?ó??????????????????3?????¨?÷?áKV??K25MH11?????÷??????????????×??????????????ú
?????????????í???·?÷???????????·IC1401??TDA9160????A/D×??????·IC1403?¨SDA9187????D/A×??????·IC1404?¨SDA9188?????÷????/×????????????·IC1406?¨TDA8443??×é????·??????·??????×????????????÷????????????IC14049????????????Q1406·??à?ó??????IC14063??F??SELECT????????????????????IC1404??????F??SELECT??????±?????±???????????1??IC14043??{28}????5V??????????2????IC14031??????IC14041????BLN??????????3??IC1405?¨SDA9086???á?????±????????????4??I2C×??????í???????è?????????¨??????????????????·??????ú?????????????????????ò????1??IC1404?ú?úF??SELECT??????????????±??ò??×??í??????2??F??SELECT?????????????·??????3??IC1406???÷/×????????????????????????????????????????í??·????????ò??????????·????????ò???????ì?????????°?????é?í???è??·?????·??????????ì?é?????è????1???????ú×???????????°????????÷?????°DISPLAY?±???°5?±???°VOL???±?°?°POWER?±?ü?????ú?÷????????×?????2???????????÷??????×??ü?°1?±?ò?°4?±??±??÷???????????????÷???ú????????????OP0???ì?é?????????°6D?±?????÷?ú???????????????è???????????????????÷??IC1404??????????/????????EPL???ì?é???
??????°01?¨ON???±???à?????????????¨??????????????·????ì???????±??°??????????????ü???????¨?÷??IC14063????F??SELECT?????¨????·?????????????????????·??§??????????IC14063????F??SELECT?????¨???????????÷IC14063?????°??F??SELECT?????ú?ú?????????·???ì???????¨???????òIC1406?????÷/×??????????????????ù?????ü??IC1406?ó???????????????????????ú?ó?????¤?¨?ò???¤??°???????°é???????÷???÷??????×÷???ò?????ü???ú???ó????????????????????????I2C×????¤×÷?ì?????????????????????ò??I2C×????¤×÷????????×??????????ú????????×÷????????°????°CPU???¤×÷??????1?±????????????·?????±¨??×??ì?á???¨?ò????×??ì?????????????????????·?¨???????????·???????ó?¨???¤??°??ò???è?·?¨???????°I2C×???????????????????×ó???¨?????ò???÷I2C×????ù±??????????±???????ò?÷????????????????????????????I2C×??????????¤×÷??????????·????ì?????????????????????????¤×÷?????????????????¤?¨?ò???¤??°?????????????×?·????????í??·?????????????????I2C×????¨???¨???????ì??CPU?????¨??I2C×????????????????? ?????è?ì?é???÷??????1??????????????????????????CPU??????I2C×?????·???
?·??2??I2C×?????SCL??SDA????????·????·??3??????????????????????????·???????4???ì?é?????÷??·?????????I2C×??????????????????ò???????ò????1??I2C×???????????????2??I2C×??????·??????I2C×??????????·???????é???????????????·???????ò????I2C×????ò?????????????????????·???????????????????¨?????????????????????÷???ò??????????????I2C×???????±??¤???·???????÷?????í???????í?????·???????ò????????I2C×???????±??¤???·??×÷?ò?ó??×÷??????I2C×?????????????????I2C×??????????????????·???????????·?????ò????????????????????I2C×????????????????????????????????????????ù?è?????????????ì??????????????I2C×??????????????ì???±????????????I2C×???????±??¤???·?????????·????I2C×?????????·???????????????·?????·??§?????????????????·???°×??????????????????????°I2C×?????????????·????????????????????????·°???????????I2C×??????????????·?ò±??¤???·?ó????I2C×??????????????????ò???÷I2C×??????·?????????????????·?ò±??¤???·?????????±?·?¨????????????I2C×??????????????????·?±?????ù???????????±I2C×?????????????????????????·?????·??§?????????????±I2C×?????????????
?????????????????·?????????÷???????????????±I2C×???????????????????·?????×ó?????ò??????°???????I2C×????????????????·?????????????ò???????????????ù???????????????????????????????????????????????????§?ò?ì????????????I2C×??????????????????·??±??¤???·?ó????I2C×??????????????????????ò??????I2C×???????????????????????×è???·?ò?????????÷??????????±????÷??????1?????????¨?è???·?ì??????I2C×??????????????ò?ù?ù?á???????????????????ù????×÷????×÷??????????2???????¤??NC??6??????F5DW???ú?????????????????¤??°??????±?????????????????ò????????×??ì????°??ú?ì???????±???ù???????????????????é????????I2C×?????·????????·??????????2?±??????????????????????????????±¨??×??ì?á?????????????????????à???????ú±í???÷?áG3F?ú??????????????????·?????±¨??×??ì?á?????????????à±??????ú????????I2C×????¤×÷????????×????????????ò????I2C×???????????????????±í???????????????ù?????????????????????ó?????????????÷·????ü?????ì??·?·¨??????????I2C×??????????????????ì??·?·¨??????????×?????????????1?????¨·?????????°??¨G88AA?ú???????????ú?ó?????????
????????????????ù?????????ú?????????????????÷???????·?¤×÷?????????ì?????????????????÷???¨?è???·?????¤×÷?????????¨???ú??????????????????????7551?¨TDA4681???¤×÷????????????7551??{20}??{22}??{24}???????ù??0V????????3?±8V×ó?????¤?????????·?????????±??°é???????÷?ì??7551?????????¤×÷?????ò????°é???????????ì???±?????????????????ì???±??75515??8V???????????????¨?÷????{14}????±¤??????????????????{27}??{28}????I2C×???????·?±???3?±6V??0?±2V???????±????3?±6V??3?±3V?????÷?????±????????SCL???????·?????ùCPU7222????????????????×÷?????????????ú?????????÷????×÷?????ù?????????à?????????·????????·?±????????ì?é??????×è3231?°????????2231??2277???????ì????·?±??????÷???????·?ó????SCL?????????????????????ì?éSCL????????×?????????·??????????????ì???????§?????????ó??·???????2?ù?????????·??·??????ú????7222??5V???????·??·?????????????????·?±???6174??7174????6223×é??????×é5V???????·???í??·???????±??¤I2C×??????????·?°???ú????SCL????????7271??7270??6271??×é????±??¤???·??????±??¤???·??????6271??3273??10V????·???????5?±6V?ù×?????????7270
?ù????CPU??5V?????ò?±??????7270·????????????±7270??7271????????SCL?????°?ì???±CPU??5V?????????????????·?ù????????CPU??5V?????????±??7270??7271?ò???¨????????SCL??????????????????±??¤?????ú??????±??¤???·×??í?????ò10V???????????ò???????ó±??¤???ò????????·????·?????????±???á??·?±?????????????7271???????????ú???????§?????÷??????????????????×???????·?????10V??CPU??5V?????ù????????7271?ù????????0?±7V????????0V????7270?ù????????4?±3V????????5?±6V??????6271?????????·???ü???ó??????????????????2?????¨????2518???????ú?ó???¤??°??????????????ù????×?·??????????????¤??°??????ò???à???????ú???????±?????????ù????×?·??????????·?¨????????IC501?¨TA8783N???°?????§???·??????IC501?¤×÷??·??????????ü??????????{41}??{42}??{43}??????????????????????????3?±2V×ó???????????????????????à???ò?á???????¤??°???????????IC501{41}??{42}??{43}??????????0?±4V×ó????°?????×ùP511A???????????????????????????÷?????·??IC501?¤×÷?ì???ù????????????IC501???????¤×÷??±??è??±???????????1????6???????°7????I2C×?????????????????2??{35}???¨????????????????
??±¤??????????????????????3??{10}??{11}????I2C×?????????????????IC5017???????ì???°{35}??????????????????????I2C×????????????????????ì?éIC5016?????????????ì??????IC501{10}??{11}????????3V??????????5V?à±??÷???????????¨IC501?¤×÷???????????ò????I2C×????????ì??????????????I2C×????????÷???????·??????????·??§???°????IC501{35}???????°?÷???????·??I2C×?????????????·???IC501{35}?????????ü0V????????????0?±6V??IC501{35}????R219??D403??C410??C415??R410??????????±????÷T461{10}?????????ì?é·?????T461{10}???????????????????ó???¨????IC501{35}??{10}??{11}???????ù?????????????±?????????????÷?????????????????ì??????I2C×???????±????ù???????????á??×???IC501{35}????????????????·???????×????????????í??·????¨??????I2C×??????????±?ò?????????ú???ò???????????ì???±?á?????à?????????????????????§?ò??????????±¤?ó?????ò?á???????????????????????¤±?????×???????±??¤???ú???????ú?°???????????????????·???????????ò???ú?±CPU?????¨??I2C×??????????ú×??ì?????ú???ú?±CPU???ì??IC501??·???±???????????????????IC501?????·?????????????????ó??CPU???ì????
?????·???????????¨???????ò???ú?ó?????ù???·?ù?????????????¤×÷×????????????????????ì??????IC501???ú×??ì?¨??????·?????????IC501??I2C×????????????í???·????????I2C×??????????????ò?????ù??IC501{35}?????????§???????ú?±?????á?????¤???????ó?¨?????????????á????±??????ó??????????????I2C×???×?±?×???????????????????????I2C×???±??¤???????????????¨???÷?áG3F?ú?????????ù?????????????¨???????????ù?????à±???×??ó?????????????????????ó??????????????????????????????I2C×???±??¤?????????????????????ú×??ì?±????????????IC?????òCPU·???±í????????IC?¤×÷?????????????????ò????????????±?????CPU???òCPU????????????IC???????????????ú?÷????±??¤×????????±??????????????????????±í????????????????I2C×??????ì?????????????????÷CPU?°I2C×????¨?????????????ì???±?????ù???????????????????????·?¨????????????°????è????I2C×????????????????????·?¨?ó??????????·????????ì?????????ì?é??????IC???????????????????????¤×÷??????·????????ò??×??í??·????????????ì?é??????IC???????????±??????I2C×?????????·??????·?ò?á?????·??????????1?????¨????29FN1???????ú?
ó?????????ù???????????????÷?ü??????·????ù???????ì????????????????????·????ó±????ì?????????????????¨??????????????????????????????????±??¤???·??×÷?ù???????ú?????????÷?????????????????????·???¤×÷???????óCPU IC1001{33}???¨±??¤???·??????????????0V??????????5V??{22}???¨??????????????????????????5V????0V???????????÷RY701??·??????????????????÷?????·??±??¤???·??×÷?ù?????????????÷±??¤???·?????????±????IC1001{33}???ê?????????·????????????????????IC1001{33}???ü???±??????5V????Q1003c??e???????????????ú?????÷?????÷?·?????????????ì?????????????????????????????ù??????????????????×÷?§?§?????????ú×?±??±?????ì?????????????????ó??·??????ú???÷?áG3F?ú?????????ù????I2C×???×?±??????????????????????????????????·?¨??????????????????????????±???????????I2C×???×?±???×÷?ù??????IC1001{42}???¨SCL?????±????×?????{43}???¨SDA??????????×????????ù??4?±6V???????±SCL??SDA??×?????????1s????????4?±2??4?±5V????·ü±????????÷???????·???????????????????????????????????????????????????????ì???±???ì??I2C×??????·???????????·???????????ì??????I2C×?
?????????????·???¤×÷??????·???IC1302{15}??????????????3V×ó??????????????11V×ó????IC1302{15}????????12V??????D1310?????ó????????12V??????????????D1310???????????·???ü???ó????????????????????2?????¨?÷?áK25???????ú?ó?????????ù?????ó×???×??????ú×?????????????????????????5????????·???????????I2C×???×?±??ù?????ù??×??ì???????????????????§?????????·IC561?¨CXD2018Q???¤×÷?????????ì?éIC561?¤×÷??????·?????{27}???????????¨??IC561{27}????I2C×????????????·???????????????¨??R568??5V?????????¨??C546??????????R568??C546???????±????????IC561?????????????????????????????????ê???ó??4?±8V??????·????·?????????ù?ù?á?°?ì??I2C×???????????????I2C×????¤×÷????????×?????×?±????ú???ì???±??????C546??R658???ì?é·???C546?????¨???????ü?????????????????????á??????IC561{27}?????????á?°?ì?????¨?è?????????????????ò??C546???????á???????????????ó??1????C546?????ó??????I2C×???±??¤????????????????±??¤???·???????ò???ú?ó?????????ù????×???×??????ú×?????2??????????±??¤???·??×÷???????ò???ú?ó???????????????????ó×???×??????ú×?????3????C546????????
I2C×??????????????°?ì??CPU??CXA1587S???ì?????ò????±??¤???·??×÷???°??CPU?á?ó????CXA1587S????????????????I2C×???×?±????ú?±??????????????????4????4????C546????????I2C×??????????????????òI2C×????¤×÷??????????×????????????????ú?????????????÷·????ü????
??????×???×?????????