2024年11月22日

大屏幕彩电维修资料—遥控电路故障检修

2003 年 11 月 19 日
 

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2.CPU???à????????±??á?????????????·???????ì?é
????CPU???à????????±??á?????????????·???ì?é???×???????÷??????·?·??ú????????±??á?????????????·????±???·?·¨??????????·¨??????·¨?????··¨?????ì?é??
±í1??1
TA8615??±??á??????????????

????

1

2

4

26

PAL

L

H

H

L

SECAM

H

L

H

L

NTSC4.43

H

H

LL

NTSC3.58

H

H

L

H

B/W

H

H

H

L


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(??)???????????????????????·???????ì?é

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?·????????????ù??????????Q304???ù????????Q305?á??????Q304?????ú×????¨?????±???éQ305??·????¨????Q304???¨???????ú×??±?????éQ304±??????·??

?????????????????¨?÷?ì???¨?????°???????ü???±???????±???????¨?÷?????¨??????·¨???????????¨???????????????????·?¤×÷??·??????±??????????·¨?ò???··¨???????????é????????1??7?????·????????Q304?ù??????Q304?¤×÷??????×????????·Q305????????????
Q304???????¨×????????ó????????×?????°é????·???????????°é???????????????????????·???¤×÷×?????????????±??ú?????????ò??·??????????????÷???????????·???????ò??????cpu?¨????±????????????????????????????????????????????ò?¨???????????±?????????·???????????????????????????????????ó????????·?·¨?????????????????ò?????????????é?????????????????·??·???????????????????·??????ú?????à??

(??)AFT???????????????????·???????ì?é

AFT???????????????????·??????·??????????????????????í????????????????????????·??????????????·??????????????·??ó×?????????????·??????????????·?????????????????ò±???×????????°????×??à????????·???????????×??????¨????×??¨?ò???¨???????¨?§?????????°?????????????¤??×??????ò?ü???????????????§????????·??¤??×??????ò?ü???????????§??±????ò???§?????????ó?±??AFT???????????????·?????÷?????????????ì?é·??§?????????????????????·??·????????????÷????????????????·¨?????÷??????????CPU??AFT???????????????????????????·AFT?????????????????????é???????????¨???????±?ì?÷???????°?óCPU??AFT?????????????????????¨·??§??????°???·??§??????°???·??§?ò????CPU???????????????????ù?????ì?é?±???×??????CPU??AFT?????????????¨?????????????????ó??????????????????????(????????)???????????????¨??????????????°??????????é??????????????????±ê×??????????????????????????·?¤×÷???????????????á??????????????±ê×????à???í?à?????¨????????????±????ò±???·??§???????÷AFl’???????·?ò????????AFT?????????????????±???????????????????????·AFT???????????????????????????
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?°???????????????????·??·?????????·?·¨?????¨??±??????????ì?????????·??????±??????????·????????·??????????????????????????????????·???????????é???????????é?????????????¨?????????·?????????????????????±??????±?±??????????????????????????·??????????CPU???ò?ü????????????????????

?????????¨?????????·??????????????????????????±?±??????????????????????????·????????CPU???ò?ü???????????????????????×???????¤??CPU?????????????·????????????????·?????????·?·¨?÷????????·¨????°???????????????????(·??ó)?????????·??CPU?????????????·????????????????????×??????ü????×÷??????±?????????±ê×?????°?????????°é???§???°????????±??????????????ù?????ì??CPU?à?????????±???????????á????????±ê×????à?ü?ò?????÷??????±ê×????????÷CPU?ò???????????·?????????????????????????????à???????????·????????????????±ê×????????????÷???à?????????ü??????????????±ê×???????????????CPU???ò?????????·??????????????????????????????????CPU????????????????????????????×è???????¨???????????????????·???ò???????????????????????·?????????¨?????????????????·???ò???????????????????·???ì?é???????·?á?????¨????????????????????????????·??ó×????????????¨?????????ü????×÷??±?????????????×è??????×é??????·????·?ò????????????×é???????÷???¨???????ò??×????ü????????·??????????????????ù?ù?????????????????????????°???????ó????????????????1??3?ù??????????
?????????·????V1002?????ù??????????0.6-0.7V·??§???÷??????????????????±?????

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CPU?°??????????????????×è?????ì?é???????????·???ì?é???ò?????????÷???§?????????¨???????¤×÷×?????·?????×÷?ü????×÷??×???·?×?????????×???·?×??????÷???????·?°???°?????????·?¤×÷???????????????????ó?????????·??·????????§???????¤×÷×??????????¨?ò??????????????·?×??????÷±??????????·?ò???°?????????·?????????????§??????·???±????¨????????????·?·¨??????·????á???????????§??????±????¨???????????????????????ü????×÷??
0.6V?ò0.6V??????±???


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