Yamaha RX-777 Service Manual page 19

A B
SCHEMATIC DIAGRAM (INPUT)
1
BUFFER
13.9
0 3 8
0
2 1
0
0
6
7
0
0
5 4
-13.9
0
2
0 -14.7
0
-14.7
0
3
4
BUFFER AMP
12.9
8
0 5
7
6
0
0
0
1
3
0
0
2 4
-13.0
12.9
0 5 8
7
6 0
0
5
0
1
2
0
0
-13.9
3 4
12.9
8
0 5
7
6 0
0
0
2 1
0
0
-13.0
3 4
6
BUFFER AMP
12.9
5 8
0
7
6 0
0
0
1
2
0
0
-13.0
3 4
7
8
All voltage are measured with a 10MΩ/V DC electric volt meter.
Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
Schematic diagram is subject to change without notice.
9
C D E
CD DIRECT AMP
14.3
0 5 8
7
6
0
0
0
0.7 14.8
0
0
0.7
0
0
1
2
0 0
3 4
-14.3
INPUT SELECTOR REC OUT SELECTOR
0
-14.7
0
-14.7
0
0 -14.7
0
-14.7
0
F G
0
14.8
5.2
0
1P 100
1P 100
MTZJ12C NJM2068D-D
Anode
Cathode
H I
6.2
0.1
5.3
3.8
0
3.8
11.6
3.8
6.1
0.1
5.3
3.8
0
3.8
11.6
3.8
11.6
15.5
11.5
12.1
6.2 6.2
6.2
5.5
6.7
12.1
7.2
0
0
0
FR654
12
P26
E5
EQ AMP
13.0
3 8
0 1
2
0
0
0
6
7
0 5
0
4
-13.0 -13.0
-13.0 -13.0
-13.0
P26
B5
NJM2068LD LA7956 LC78211
9
8 4 8
1
30
1
1
1
J K L
RX-777
IC501, 506: NJM2068LD
IC502, 509~512: NJM2068D-D
Dual OP-Amp
1 2 3 4 5 6 7 8
IC503, 504: LC78211
Analog Function Switch
1 30 R1
L1
2 29
L2 R2
3 28
L3 R3
L4 4 27 R4
5 26
LCOM1 RCOM1
L5 6 25 R5
L6 7 24
R6
8 23
LCOM2 RCOM2
9 22
L7 R7
10 21
L8 R8
11 20
LCOM3 RCOM3
V 19 LEVEL SHIFTER
DD
16
V SS
14
ZZ D1
LATCH
12
V EE
15
ZZ CL
RES 18
SHIFT REGISTER
17
S ZZ 13 CE
IC507, 508: LA7956
Video Switch
6dB
AMP
4 INPUT 1 OUTPUT
DRIVER CONTROL
VIDEO SWITCH
1 2 3 4 5 6 7 8 9
VIDEO A B VIN1 GND VIN2 VCC VIN3 VIN4
OUT
2SC1815 2SC1740S 2SD2375
2SD1915F
DTA144ES
DTC114ES
15
E
E
C B
C B B C
E
25