Yamaha DSP-E800 - Video Signal Path; Digital Input Selector

ABCDEFGH
1
2
3
4
5
6
IJKL
7
8
DSP-E800
S-VIDEO SELECTOR
VIDEO SELECTOR
DIGITAL INPUT
SELECTOR
DIGITAL
5.0 0 2.5 0 0 0 0
0
3.4
0 0 0
3.4
-4.9
5.0 0 2.5 0 0 0 0
0
3.4
0 0 0
3.4
-4.9
5.0 0 2.5 0 0 0 0
0
3.4
0 0 0
3.4
-4.9
3.9
4.7
0
3.9
4.7
0
4.3
4.7
0
2.4
2.4
3.0
3.0
3.0
3.0
0
0
0
0
0
0
0
0
00
0
0
0
4.6 4.6
00
4.6
3.9
4.6
0
4.6
4.3
4.6
4.6
4.6
0
0
0
0
0
0
0
0
4.6
0
4.6
0.3
0.3
0.3
4.7
4.7
4.7
0
0
4.7
4.7
0.3
0
4.7
4.7
4.7
4.7
0
0
4.7
4.7
4.7
4.7 4.7 4.7
0
0
0
3.9 4.7 4.7
0 4.6 0
0 0 0
* All voltages are measured with a 10MΩ/DC electric volt meter.
* Components having special characteristics are marked Z and must be
replaced with parts having specifications equal to those originally installed.
* Schematic diagram is subject to change without notice.
■ SCHEMATIC DIAGRAM
IC601 — 603 : NJM2296D
4-input to 3-output Video switch
13
16 10 14 2
1
15
11
81264
9
7
5
3
VIN1
SW2V+ SW1 SW5
V–GNDSW4SW3
VOUT1
VOUT2
VOUT3
VIN2
20k
20k
20k
20k
20k
S3
S2
S4
S1
S5
6dB
AMP
75Ω
DRIVER
20k
S6
S7
6dB
AMP
75Ω
DRIVER
20k
6dB
AMP
75Ω
DRIVER
VIN3
VIN4
VIN5
VOUT1
VIN1
VIN1
MUTE
VIN2
MUTE
VIN3
MUTE
VIN4
MUTE
VIN4
MUTE
VIN5
MUTE
VIN5
MUTE
MUTE
SW5
H
H
L
H
L
H
L
H
L
H
L
H
L
H
L
L
SW4
X
L
SW3
H
X
SW2
H
L
H
H
H
L
L
H
H
L
L
L
SW1
L
L
H
H
H
H
X
X
L
H
H
L
H
H
L
H
VOUT2
MUTE
MUTE
MUTE
VIN2
VIN2
VIN3
VIN4
VIN4
VIN4
VIN4
VIN4
VIN5
VIN5
VIN5
VIN5
MUTE
VOUT3
VIN1
MUTE
VIN1
MUTE
MUTE
VIN3
VIN4
VIN4
VIN4
MUTE
MUTE
VIN5
VIN5
MUTE
MUTE
MUTE
INPUTS OUTPUTS
H: High level, L: Low level, X: Don't care.
IC651, 652 : TC74HCU04AP
Hex Inverters
1A
1Y
2Y
V DD
6A
1
2
3
4
11
2A 6Y
5A
12
13
14
3A
3Y
5Y
4A
5
6
7
V SS 4Y8
9
10
IC653, 654 : TC74HC00AP
Quad 2-input NAND Gate
A1
B1
A2
V DD
B4
1
2
3
4
11
Y1 A4
Y4
12
13
14
B2
Y2
B3
A3
5
6
7
V SS Y38
9
10
IC655 : HD74HC153P
Dual 4 to 1 Data Selectors
15
STROBE
2G
2
B
SELECT
14
A
SELECT
13 12 11 10 9
OUTPUT
2Y
1
STROBE
1G
3 4 5
6
7
OUTPUT
1Y
16
VCC
8
GND
DATA INPUTS
DATA INPUTS
2C3 2C2 2C1
BA
2C0 2Y
2G
B
A
1C3 1C2 1C1 1C0 1Y
1G
BAB
A
SELECT
INPUTS
B
X
L
L
H
H
A
X
L
H
L
H
STROBE
G
H
L
L
L
L
OUTPUT
Y
L
C0
C1
C2
C3
43
P42
K-4
P44
B-1
P42
E-1