Sharp LC-24LE240EK Service Manual ▷ View online
17
LC-24LE240
CIRCUIT DESCRIPTIONS
% LSVM^SRXEP QSYRXIH ERH (MKMXEP ,EPJ2MQ XYRIV MW YWIH MR XLI TVSHYGX [LMGL GSZIVW
&ERHW*VSQ1,^XS1,^JSV'3*(1 JVSQ1,^XS1,^JSV''-6',
8LIXYRMRKMWEZEMPEFPIXLVSYKLXLIHMKMXEPP]GSRXVSPPIH-'FYW400 &IPS[]SY[MPPJMRH
MRJSEFSYXXLIXYRIV
&ERHW*VSQ1,^XS1,^JSV'3*(1 JVSQ1,^XS1,^JSV''-6',
8LIXYRMRKMWEZEMPEFPIXLVSYKLXLIHMKMXEPP]GSRXVSPPIH-'FYW400 &IPS[]SY[MPPJMRH
MRJSEFSYXXLIXYRIV
-R EGXMZI ERXIRRE STXMSR XLI JSPPS[MRK GMVGYMX EVI YWIH %28C'860 TMR MW GSRXVSPPIH F]
QMGVSGSRXVSPPIV -J %28C'860 MW PS[ %28C4;6 [MPP FI PS[ -J %28C'860 MW LMKL
%28C4;6[MPPFILMKL
QMGVSGSRXVSPPIV -J %28C'860 MW PS[ %28C4;6 [MPP FI PS[ -J %28C'860 MW LMKL
%28C4;6[MPPFILMKL
3:)6C'96C()8)'8TMRMWEQSRMXSVJSVWLSVXGMVGYMXMRERXIRRE3:)6C'96C()8)'8
MWPS[ %28C'860[MPPFIPS[WS%28C4;6[MPPFIPS[*MREPP]WLSVXGMVGYMXTVSXIGXMSRMW
HSRIF]GMVGYMXWERHQMGVSGSRXVSPPIV
MWPS[ %28C'860[MPPFIPS[WS%28C4;6[MPPFIPS[*MREPP]WLSVXGMVGYMXTVSXIGXMSRMW
HSRIF]GMVGYMXWERHQMGVSGSRXVSPPIV
+IRIVEPHIWGVMTXMSRSJ 7SR]6)
8LI7986)MWHIWMKRIHJSVXIVVIWXVMEP8:HMKMXEP
EREPSK
ERHHMKMXEPGEFPI
VIGITXMSR-XMRGPYHIWEJYPPFERHXYRIVERHEGLERRIPJMPXIVMRKJSVHMKMXEPWMKREPW-XTVSZMHIW
EPS[-*SYXTYXEJXIVGLERRIPJMPXIVMRKXSHVMZIEGLERRIPHIQSHYPEXSV8YRMRKFERH
W[MXGLMRKERHMRMXMEPM^EXMSREVIQEHIZMEER-'FYW
MRXIVJEGI8LIQSHYPIMWFYMPXSREPS[PSWWTVMRXIH
GMVGYMXFSEVHGEVV]MRKEPPXLIGSQTSRIRXWMREQIXEP
LSYWMRKJVEQI[MXLXSTERHVIEVGSZIVW8LIWMRKPI
EIVMEPGSRRIGXSVMWQSYRXIHSRSRIJVEQIWMHIERHEPP
SXLIVGSRRIGXMSRWEVIQEHIZMETMRWEXXLIFSXXSQ
VIGITXMSR-XMRGPYHIWEJYPPFERHXYRIVERHEGLERRIPJMPXIVMRKJSVHMKMXEPWMKREPW-XTVSZMHIW
EPS[-*SYXTYXEJXIVGLERRIPJMPXIVMRKXSHVMZIEGLERRIPHIQSHYPEXSV8YRMRKFERH
W[MXGLMRKERHMRMXMEPM^EXMSREVIQEHIZMEER-'FYW
MRXIVJEGI8LIQSHYPIMWFYMPXSREPS[PSWWTVMRXIH
GMVGYMXFSEVHGEVV]MRKEPPXLIGSQTSRIRXWMREQIXEP
LSYWMRKJVEQI[MXLXSTERHVIEVGSZIVW8LIWMRKPI
EIVMEPGSRRIGXSVMWQSYRXIHSRSRIJVEQIWMHIERHEPP
SXLIVGSRRIGXMSRWEVIQEHIZMETMRWEXXLIFSXXSQ
*IEXYVIW
*YPPJVIUYIRG]VERKIJVSQXS1L^
(MKMXEP4PEXJSVQ(:&88(:&'-7(&8
%87'
%REPSKTPEXJSVQW4%0&+-(/287'1 7)'%100v
0S[-*XYRIVGSRGITX
%REPSKTPEXJSVQW4%0&+-(/287'1 7)'%100v
0S[-*XYRIVGSRGITX
1. Tuner (TU3)
1.1 General description of Sony RE216:
18
LC-24LE240
4VSKVEQQEFPIGLERRIP*MPXIVFERH[MHXL
*YPP]-'FYWGSRXVSPPIH
*SV,]FVMH8:ETTPMGEXMSRW
*YPP]-'FYWGSRXVSPPIH
*SV,]FVMH8:ETTPMGEXMSRW
4MRRMRK8EFPI
ERH%TTPMGEXMSR&PSGO(MEKVEQSJ8YRIV
19
LC-24LE240
*IEXYVIW
'137 8IGLRSPSK]
,MKL)JJMGMIRG]
,MKL4766 H&EX,^
(MJJIVIRXMEP34EQT-RTYX
%>%(&TVSZMHIW:MFVEXMSR7TIGXVYQ1SHYPEXMSRGPSGOJSVVIHYGI)1-
4VSZMHI1YXIJYRGXMSRWIX1YXIC&XS+2([MPPKSMRXS1YXIWXEXYW
*SVXLIMRTYXWXEKI%>%(&FYMPXMRE/SLQVIWMWXSVW+EMRWIXXMRK!H&
1E\MQYQ&EXXIV]0MJIERH1MRMQYQ,IEX
)JJMGMIRG];MXLER
Q%5YMIWGIRX'YVVIRX
3YXTYX4S[IVEX 8,(
,MKL)JJMGMIRG]
,MKL4766 H&EX,^
(MJJIVIRXMEP34EQT-RTYX
%>%(&TVSZMHIW:MFVEXMSR7TIGXVYQ1SHYPEXMSRGPSGOJSVVIHYGI)1-
4VSZMHI1YXIJYRGXMSRWIX1YXIC&XS+2([MPPKSMRXS1YXIWXEXYW
*SVXLIMRTYXWXEKI%>%(&FYMPXMRE/SLQVIWMWXSVW+EMRWIXXMRK!H&
1E\MQYQ&EXXIV]0MJIERH1MRMQYQ,IEX
)JJMGMIRG];MXLER
Q%5YMIWGIRX'YVVIRX
3YXTYX4S[IVEX 8,(
)PMQMREXI4S[IVSRERH4S[IVSJJw4STxRSMWI
%*I[IV)\XIVREP'SQTSRIRXW
3TXMQM^IH4;1 3YXTYX7XEKI)PMQMREXIW0'3YXTYX*MPXIV
-RXIVREPP]KIRIVEXIO,^7[MXGLMRK*VIUYIRG]XSIPMQMREXI'ETEGMXSVERH
6IWMWXSV
-QTVSZI4766zH& ERH;MHI7YTTP]:SPXEKI:XS:
*YPP](MJJIVIRXMEP(IWMKR6IHYGIW6*6IGXMJMGEXMSR
8LMWGLMTLEWFIIRFYMPXMREZIV]WXVSRK)7(TVSXIGXMSR
7]WXIQPIZIP)7(/:-)')7('SRXEGX0IZIP
;EJIV'LMT7GEPI4EGOEKI;'74
87734 4EGOEKI[MXL)\TSWIH4EH
%*I[IV)\XIVREP'SQTSRIRXW
3TXMQM^IH4;1 3YXTYX7XEKI)PMQMREXIW0'3YXTYX*MPXIV
-RXIVREPP]KIRIVEXIO,^7[MXGLMRK*VIUYIRG]XSIPMQMREXI'ETEGMXSVERH
6IWMWXSV
-QTVSZI4766zH& ERH;MHI7YTTP]:SPXEKI:XS:
*YPP](MJJIVIRXMEP(IWMKR6IHYGIW6*6IGXMJMGEXMSR
8LMWGLMTLEWFIIRFYMPXMREZIV]WXVSRK)7(TVSXIGXMSR
7]WXIQPIZIP)7(/:-)')7('SRXEGX0IZIP
;EJIV'LMT7GEPI4EGOEKI;'74
87734 4EGOEKI[MXL)\TSWIH4EH
2. Audio Amplifi er Stage with AZAD2102(U163, U164)
2.1. General description
1& YWIW X[S ; 'PEWW ( 1SRS %YHMS %QTPMJIVW JSV JVSQ x XS x 8:W
%>%(& MW E ;EXXW QE\ GER
%:HH!(:HH!:SPX [MXL LMKL IJJMGMIRG] JMPXIVJVII GPEWW( EYHMS TS[IV EQTPMJMIV MR E
QQ \ QQ [EJIV GLMT WGEPI TEGOEKI ;'74 %>%(& YWIW 'YVVIRX
W[MXGL XIGLRSPSK] XS EGLMIZI LMKL TIVJSVQERGI GPEWWH EQTPMJMIV XLEX JIEXYVIW
8,( IJJMGMIRG]zH&4766XSMQTVSZI6*VIGXMJMGEXMSRMQQYRMX]
%>%(& MW E ;EXXW QE\ GER
%:HH!(:HH!:SPX [MXL LMKL IJJMGMIRG] JMPXIVJVII GPEWW( EYHMS TS[IV EQTPMJMIV MR E
QQ \ QQ [EJIV GLMT WGEPI TEGOEKI ;'74 %>%(& YWIW 'YVVIRX
W[MXGL XIGLRSPSK] XS EGLMIZI LMKL TIVJSVQERGI GPEWWH EQTPMJMIV XLEX JIEXYVIW
8,( IJJMGMIRG]zH&4766XSMQTVSZI6*VIGXMJMGEXMSRMQQYRMX]
%>%(& TVSZMHI E :MFVEXMSR7TIGXVYQ QSHYPEXMSR GPSGO JSV 4;1 3YXTYX 8LMW
ZMFVEXMSRJVIUYIRG]MWEVSYRH/,>WLMJX /,>SJ*T[Q
ZMFVEXMSRJVIUYIRG]MWEVSYRH/,>WLMJX /,>SJ*T[Q
8LI EHZERXEKI SJ XLI WQEPP WM^ITEGOEKI ;'74
QEOIW %>%(& ZIV] WYMXEFPI JSV
QSFMPI TLSRI ERH 4(% HIZMGI ETTPMGEXMSR %RH XLI 'PEWW( EQTPMJMIV WXVYGXYVI PIX
%>%(& XS LEZI LMKLP] IJJMGMIRG] TS[IV GSRWYQTXMSR XLER 'PEWW%& EQTPMJMIV
%>%(& GER WLVMRO XLI ETTPMGEXMSR FSEVH VIHYGI W]WXIQ GSWX ERH I\XIVREP
GSQTSRIRXW
QSFMPI TLSRI ERH 4(% HIZMGI ETTPMGEXMSR %RH XLI 'PEWW( EQTPMJMIV WXVYGXYVI PIX
%>%(& XS LEZI LMKLP] IJJMGMIRG] TS[IV GSRWYQTXMSR XLER 'PEWW%& EQTPMJMIV
%>%(& GER WLVMRO XLI ETTPMGEXMSR FSEVH VIHYGI W]WXIQ GSWX ERH I\XIVREP
GSQTSRIRXW
)7( PIZIP TVSXIGXMSR -3 IQFIHHIH MR %>%(& *SV KIRIVEP ETTPMGEXMSRW HSIWRvX
RIIH XS EHH I\XVE )7( TVSXIGXMSR HIZMGI PMOI :EVMWXSVW MR ETTPMGEXMSR W]WXIQ JSV
%>%(&vW-3
RIIH XS EHH I\XVE )7( TVSXIGXMSR HIZMGI PMOI :EVMWXSVW MR ETTPMGEXMSR W]WXIQ JSV
%>%(&vW-3
2.2. Features
20
LC-24LE240
2.3. Absolute ratings
2.3.1. Electrical characteristics
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