Technics SA-EH770 Service Manual page 62

SCHEMATIC DIAGRAM-4
C
MAIN CIRCUIT
W501
TUNER Lch/C
1
TUNER Rch
2
A.GND
3
Lch IN
4
R512
Rch IN
5
+B(10V)
6
SUR L
7
SUR R
8
To S.W
9
SOUND
MIC
10
PROCESSOR
-B(-10V)
11
(SH-EH770)
V.GND
12
D.GND
13
CS/ REQ
14
CLK
15
DATA
16
CT GND
17
SH FL1
18
SH FL2
19
SYNC
20
W902A
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
W901A
15
14
13
12
11 6V
10
9
8
7
6
5
4
3
2
1
CP101
T.GND 1
+B(1) 2
SD 3
+B(2) 4
DET 5
To TUNER UINT
Rch IN 6
on SCHEMATIC
CE 7
DIAGRAM-11
Lch IN 8
DI 9
DO 10
CL 11
: POSITIVE VOLTAGE LINE
: NEGATIVE VOLTAGE LINE
B
A
A
B
R511 R509
47 47
47 R510 47
A
10.4V
B
C
D
B
E
F
G
C
D
E
F
G
E
F
J
K
L
M
I
-30.1V
-30.7V
A
B
C
G
R230 1K
B
F
R229 1K
A
E
D
C
: FM SIGNAL LINE
: AM SIGNAL LINE
7.6V
-10.4V
R597 C659
2.2K 16V10
C660
R598
16V10
2.2K
1 2
Y1 Y0
V
DD
15
16
5.7V 0V
R211
270
Q605,606
2SD2144STA
MUTING
Q707
2SB1417PQTA
REGULATOR R707
4.7
-37.3V
Q723
2SC3940AQSTA
REGULATOR
7.2V 14.7V
7.8V
R764 R763
330 4.7K
:MIC SIGNAL LINE
:AUDIO SIGNAL LINE
R631
3.9K
A
B
R632
3.9K
C202
0.1
0V 0V -10.4V
3 4 5 6 7 8
Z1 Z0 INH Vss G
IC201
BU4053BCFE2
SIGNAL SELECTOR
C
A B
X1 X0
14 13
12 11 10 9
0V 0V 0V 0V
B A
F
R603
3.3K
C656
16V10
C
C655
16V10
B
C602
16V10
D
R695
470
A
E
0V
0.7V
Q605
0V
-10V 4.9V
Q612
Q606
UN411FTA
MUTING CONT.
Q609,610
2SD2144STA
A MUTING
Q609
R693
0V
1K
B -10V
Q610
R692 R694
0V
1K 22K
C
-10V
D705
RL1N4003N02
H
A
D718
RL1N4003N02
D717
RL1N4003N02
C731
1000P
D
D720
RL1N4003N02
C
D719
RL1N4003N02
14.7V
R688
1.5K
R687
1.5K
5.1V
-10.2V