JVC LS20C70BU Service Manual page 49

LT-20C70BU
STANDARD CIRCUIT DIAGRAM
CONTENTS
USING P.W. BOARD......................................................................................2-1
SEMICONDUCTOR SHAPES ......................................................................2-1
BLOCK DIAGRAM ........................................................................................2-2
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM ................................................................................................................ 2-3
IR PWB CIRCUIT DIAGRAM .................................................................................................................... 2-25
KEY PWB CIRCUIT DIAGRAM ................................................................................................................. 2-26
PATTERN DIAGRAMS
MAIN PWB PATTERN .............................................................................................................................. 2-27
IR PWB PATTERN .................................................................................................................................... 2-29
KEY PWB PATTERN ................................................................................................................................ 2-29
USING P.W. BOARD
P.W.B ASS'Y name
MAIN P.W. BOARD
KEY P.W. BOARD
IR P.W. BOARD
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM VIEW
E
C
B
IC
BOTTOM VIEW
OUT
E
IN
CHIP IC
N
1
LT-20C70BU
DA-5098801104 (PWB-0997-A)
DA-5098801105 (PWB-0997-B)
DA-5098801106 (PWB-0997-C)
FRONT VIEW
B C E
E C B
( G ) ( D ) ( S )
FRONT VIEW
IN E OUT
TOP VIEW
E C B
1
1 N
1
N
TOP VIEW
CHIP TR
C
E C B B E
TOP VIEW
1
N
N
(No.YA436)2-1