Schematic Diagram - Audio Board (3/4) - Sony STR-DA3000ES Service Manual

STR-DA3000ES
6-16. SCHEMATIC DIAGRAM – AUDIO Board (3/4) – •
C615
(CHASSIS) 0
(US,CND)
J609
4P
R447
L
2ND ZONE
OUT
AUDIO
R547
VARIABLE
R
See page 77 for IC Block Diagram.
(3/4)
R444
68k
R446
4.7k
C446
R445 22
100 50V
RY641
-1 VCC
LINE AMP
-2
IC643
NJM4580E-D
R545
100
D641
C546
1SS355
22
50V
1k R546
4.7k
R544 C545 R543
68k 220p 100k
1k
R646
10
Q641
2SC2712
C444
C445 R443 R642 R442 C443
220
220p 100k 33 1k 22 50V
10V
C642
0.0022
TONE ELECTRICAL
C644 VOLUME
VEE
0.01
IC642
CXD9725M
C643
0.0022
C544
R643 R542 C543
220
33 1k 22 50V
10V
Q631,632,641
RELAY DRIVER
Q631
R645
2SC2712
10k
Q632
R631
DTA114TKA
10
R644 R632
4.7k 220
34 34
(Page 32)
R441
47k
C442
22
50V C441
22
R647
50V
0
R648
0
VCC
BUFFER
IC641
VEE
NJM4580E-D
C542
22
50V C541
22
50V
R541 47k
R649
0
R633
1k
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
CC1
CC2
BB3
(Page 33)
BB4
CC3
CC4
CC5
CC6
CC7
CC8
Les composants identifiés par une marque 0 sont
critiques pour la sécurité. Ne les remplacer que
par une pièce portant le numéro spécifié.