Yamaha RX-777, Service Manual

Page: 19 / 32

A
1
2
3
4
5
6
7
8
9
B C D E F G H I J K L
RX-777
SCHEMATIC DIAGRAM (INPUT)
25
BUFFER
P27 A5
MTZJ12C
Anode
Cathode
NJM2068D-D NJM2068LD LA7956
1
15
30
LC78211 2SC1815
1
8
1
4
8
1
9
E
C B B C
E
2SC1740S
2SD1915F
DTA144ES
DTC114ES 2SD2375
E
C
B
8 7 6 5 4 3 2 1
OUT
1
–Vcc
+IN
2
–IN
2
OUT
2
+Vcc
+IN
1
–IN
1
IC501, 506: NJM2068LD
IC502, 509~512: NJM2068D-D
Dual OP-Amp
IC503, 504: LC78211
Analog Function Switch
IC507, 508: LA7956
Video Switch
1
2
3
4
5
6
7
8
9
10
11
30
29
28
27
26
25
24
23
22
21
20
19
16
12
18
17
14
15
13
LEVEL SHIFTER
LATCH
CONTR
OL
SHIFT REGISTER
ZZ
ZZ
ZZ
L1
L2
L3
L4
LCOM1
L5
L6
L7
L8
RES
S
V
DD
V SS
V
EE
LCOM2
LCOM3
R1
R2
R3
R4
RCOM1
RCOM2
RCOM3
R5
R7
R8
D1
CL
CE
R6
1 2 3 4 5 6 7 8 9
VIDEO
OUT
A B VIN1 GND VIN2 VCC VIN3 VIN4
DRIVER
6dB
AMP
CONTROL
4 INPUT 1 OUTPUT
VIDEO SWITCH
★ All voltage are measured with a 10M
Ω
/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.
CD DIRECT AMP
BUFFER AMP
BUFFER AMP
INPUT SELECTOR REC OUT SELECTOR
EQ AMP
P26
A7
P26
A7
P26
E5
P26
B5
3 8
1 2
6
4
7
5
6
5
8
7
2
3
4
1
6
5
8
7
3
2
4
1
6
5
8
7
3
2
4
1
6
5
8
7
3
2
4
1
10
9 7 6 4 3 2 1
10
9 7 4
11 8 5 11 8 5
20 23 26 20 23 26
6 3 2 1
21 22 24 25 27 28 29 30 21 22 24 27 25 28 29 30
6
5 8
7
1
3
2
4
-13.0
3
-13.0
2
-13.0
8
-13.0
1
6
5
4
7
0
0
13.9
0
0
0
0
0
0
0
-13.9
0
-14.7
-14.7
12.9
-13.0
0
0
0
0
0
0
12.9
-13.9
0
0
0
0
0
0
12.9
-13.0
0
0
0
0
0
0
12.9
-13.0
0
-14.7
-14.7
14.7 14.7 14.7 0
0
-14.8
0
5.3
14.7 14.7 0
0 0 0 0
0
0 0 0
0
0 0 0
0
0 0 0
0 0
0
0
0 0 0
0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0 0
0
0 0
0
0
0
-14.8
0
5.3
0
0
0
0
0
0
0
-14.7
-14.7
0
0
0
0
14.3
-14.3
0
0
0
0
0
0
0.7
0.7
14.8
0
0
14.8
0
0
0
0
5.2
0
0
-13.0
13.0
0
0
0
0
6.2
6.2
7.2
12.1
15.5
5.5
11.5
6.2
6.7
0
0
0
12.1
11.6
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
FR654
1P 100
1P 100
12