DOWNLOAD Sharp LC-24LE240EK Service Manual ↓ Size: 18.35 MB | Pages: 84 in PDF or view online for FREE

178%6&PSGO(MEKVEQ

Reset circuit using for initializing main Mstar IC. Reset condition is high and normal working condition is 
low for RESET pin.

'--RXIVJEGI4S[IV7[MXGL
-XMWYWIHJSV'-QSHYPIWYTTP][LIR1SHYPIMWMRWIVXIHMXQIERW '-HIXIGXMWPS[ 8LMW
GMVGYMXMWSTIRIHSVGPSWIHF]'-C43;)6C'860TSVXSJQEMRY'SRXVSPPIV

Main Concept IC has integrated 2 USB 2.0 interface. One of them is used for Ethernet function, the other one 
is used for USB connectivity for last user. Last user can play video, picture and audio fi les. Also digital chan-
nels can be recorded to external storage device by this interface. All SW fi les can be updated with interface.

USB circuit has 3 main parts:
•  Integrated USB 2.0 Host interface of D3K (U5).
•  Protection IC (U145)
•  Over Current Protection IC (U8)

8LI+F((67(6%1MWSVKERM^IHEWE1FMX\ -3W\FEROW1FMX\-3W\
FEROWHIZMGI8LMWW]RGLVSRSYWHIZMGIEGLMIZIWLMKLWTIIHHSYFPIHEXEVEXIXVERWJIV
VEXIWSJYTXS1FWIGTMR((6 JSVKIRIVEPETTPMGEXMSRW8LIGLMTMWHIWMKRIH
XSGSQTP][MXLXLIJSPPS[MRKOI]((67(6%1JIEXYVIWWYGLEWTSWXIH'%7[MXL
EHHMXMZIPEXIRG][VMXIPEXIRG]!VIEHPEXIRG] 3JJ'LMT(VMZIV3'( MQTIHERGI
EHNYWXQIRXERH3R(MI8IVQMREXMSR%PPSJXLIGSRXVSPERHEHHVIWWMRTYXWEVI
W]RGLVSRM^IH[MXLETEMVSJI\XIVREPP]WYTTPMIHHMJJIVIRXMEPGPSGOW-RTYXWEVIPEXGLIHEX
XLIGVSWWTSMRXSJHMJJIVIRXMEPGPSGOW'/VMWMRKERH'/JEPPMRK %PP-3WEVIW]RGLVSRM^IH
[MXLETEMVSJFMHMVIGXMSREPWXVSFIW(57ERH(57 MREWSYVGIW]RGLVSRSYWJEWLMSR8LI
EHHVIWWFYWMWYWIHXSGSRZI]VS[GSPYQRERH FEROEHHVIWWMRJSVQEXMSRMRE6%7'%7
QYPXMTPI\MRKWX]PI*SVI\EQTPI+F\ HIZMGIVIGIMZIEHHVIWWMRK8LI+F
((6HIZMGISTIVEXIW[MXLEWMRKPI:•:TS[IVWYTTP]ERH:•::((5
8LI+F((6HIZMGIMWEZEMPEFPIMRFEPP*&+%\  ERHFEPP*&+%\

*IEXYVIW

y.)()'WXERHEVH:((!:•:4S[IV7YTTP]
y:((5!:•:
y1,^J'/JSV1FWIGTMR
y&EROW
y4SWXIH'%7
y4VSKVEQQEFPI'%70EXIRG]
y4VSKVEQQEFPI%HHMXMZI0EXIRG]
y;VMXI 0EXIRG];0 !6IEH0EXIRG]60
y&YVWX0IRKXL-RXIVPIEZIRMFFPIWIUYIRXMEP
y4VSKVEQQEFPI7IUYIRXMEP-RXIVPIEZI&YVWX1SHI
y&MHMVIGXMSREP(MJJIVIRXMEP(EXE7XVSFI7MRKPIIRHIHHEXEWXVSFIMWERSTXMSREPJIEXYVI
y3JJ'LMT(VMZIV3'( -QTIHERGI%HNYWXQIRX
y3R(MI8IVQMREXMSR
y7TIGMEP*YRGXMSR7YTTSVX 4%764EVXMEP%VVE]7IPJ6IJVIWL  SLQ3(8 ,MKL
8IQTIVEXYVI7IPJ6IJVIWLVEXIIREFPI
y%ZIVEKI6IJVIWL4IVMSHYWEXPS[IVXLER8'%7)”'YWEX”' 8'%7)
”'
y%PP SJTVSHYGXWEVI0IEHJVII,EPSKIRJVIIERH6S,7GSQTPMERX

4MRRMRK