Technics SA-EH760 Service Manual page 72

SCHEMATIC DIAGRAM- 4
B
MAIN CIRCUIT
W501
TU L/C ch 1
TUNER Rch 2
A.GND 3
MID Lch IN 4
MID Rch IN 5
DC 10V 6
TW Lch IN 7
TW Rch IN 8
S.W 9
To
MIC 10
MAIN CIRCUIT
- 7.5V 11
of SOUND
V.GND 12
PROCESSOR
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
R626 1K
7
R629 1K
6
5
4
3
2
1
W901A
15
14
13
12
11 6.2V
10
9
8
7
6
5
4
3
2
1
CP101
T.GND 1
+B(1) 2
SD 3
+B(2) 4
To TUNER UINT
on SCHEMATIC
DIAGRAM- 9
DET 5
R230
Rch IN 6
CE 7
R229
Lch IN 8
DI 9
DO 10
CL 11
Jeanne van Woerkom electra
: POSITIVE VOLTAGE LINE
: NEGATIVE VOLTAGE LINE
B
A
A
B
R597 2.2K
R598 2.2K
10.4V A
B
C
D
-7.5V
A
B
C
E
F
G
R211
270
C
D
E
F
G
H
I
J
B
A
C
K
L
M
Q707
N
2SB1548PQAU
O
REGULATOR
-27.6V
-28.1V
14.8V
Q723
2SC3940AQSTA
REGULATOR
7.2V 14.8V
7.2V
7.8V
G
1K
B
F
1K
A
E
D
C
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: FM SIGNAL LINE : SURROUND SP.DRIVE SIGNAL LINE
: AM SIGNAL LINE : CENTER SP.DRIVE SIGNAL LINE
7.5V
-7.5V
C659
16V10
C660
16V10
0V 0V
1 2 3
Z1
Y1 Y0
V
DD
16 15 14
5.5V 0V
B
A
R707
1/4W4.7
-34.2V
R764
330
P
: SOURCE SIGNAL LINE
R631
3.9K
A
B
R632
3.9K
C202
0.1
0V 0V -7.5V
4 5 6 7 8
Z0
INH V G
SS
A B C
X1 X0
13 12 11 10 9
0V 0V 0V
IC201
BU4053BCFE2
SIGNAL SELECTOR
R603
3.3K
R688
R687
C B
0V
R683 R684
1K 1K
0V
Q606
Q605
Q605,606
2SD2144STA
MUTING
14.2V
C741
D717- 720
0.1
RL1N4003N02
14.8V
Q R
1.5K
1.5K
D
0V
0V