NAD T761, Руководство по обслуживанию

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48
AC3 BOARD
U118-U119: 74HC00
A1
B1
Y1
A2
B2
Y2
GND
VCC
B4
A4
Y4
B3
A3
Y3
1
2
3
4
5
6
7
14
13
12
11
10
9
8
AUDIO BOARD
U301: TC9273N-004
2 S1
1
V
SS
26
V
DD
27 S1
3 S2 26 S2
4 S3 25 S3
5 S4 24 S4
6 S5 23 S5
7 S6 22 S6
8 S7 21 S7
9 S8 20 S8
10 S9 19 S9
11 S10 18 S10
12 S11
13
GND
14
CK
15
DATA
16
RESISTER
17 S11
(L-ch)
10bit
Latch
Circuit
LEVEL SHIFT + SHIFT RESISTER
CIRCUIT
(R-ch)
10bit
Latch
Circuit
(Same
as L-ch
Circuit)
AUDIO BOARD / COMPONET VIDEO BOARD
U302, U901: HCF4053BT
1 Y
1B
2 Y
0B
3 Y
1C
4 Z
C
5 Y
0C
6 E
7 V
EE
16 V
DD
15 Z
B
14 Z
A
13 Y
1A
12 Y
0A
11 S
A
10 S
B
8 V
SS
9 S
C
E
S
C
S
B
S
A
LEVEL
CONVER
TER
Y
0C
Y
1C
Z
C
Y
0B
Y
1B
Z
B
Y
0A
Y
1A
Z
A
LOAD BOARD
U701: NJM4558D
AMPLIFIER 1
OUTPUT
INVERTING
INPUT
NON-INVERTING
INPUT
V –
AMPLIFIER 2
V +
OUTPUT
INVERTING
INPUT
NON-INVERTING
INPUT
1
2
3
4
8
7
6
5
+ – – +