Arcam DiVA AVR300, Service Manual

Page: 42 / 87

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AVR300
SURROUND SOUND RECEIVER
IC BLOCK DIAGRAM
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
STB
17 S11
(L-ch)
10bit
Latch
Circuit
LEVEL SHIFT + SHIFT RESISTER
CIRCUIT
(R-ch)
10bit
Latch
Circuit
(Same
as L-ch
Circuit)
AUDIO BOARD
U3006: TC9273N
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
U3001: TC9273N-004
1 OUTPUT A
2
A
INVERTING A
3 NON INVERTING A
OUTPUT B
INVERTING B
NON INVERTING B 4 V-
8 V+
7
6
5
- +
B
- +
AUDIO BOARD
U3005, U3007, U3008, U3010: NJM5532M
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
+
V
OUT RED
V
OUT GREEN
V
OUT BLUE
V
–
V
–
SELECT
ENABLE
RED 1
GREEN 1
BLUE 1
GND
GND
RED 2
GREEN 2
BLUE 2
COM-VIDEO BOARD
U201, U202, U204: LT1675CGN
COM-VIDEO BOARD
U203: LT1675CS8-1
1
2
3
4
8
7
6
5
V
+
ENABLE
V
OUT
SELECT
V
IN1
GND
V
IN2
V
–
DSP BOARD
U104: 74HC245
A
1
2
G
Enable
19
DIR 1 V
CC
20
GND 10 B
8
11
A
2
3 B
1
18
A
3
4 B
2
17
A
4
5 B
3
16
A
5
6 B
4
15
A
6
7 B
5
14
A
7
8 B
6
13
A
8
9 B
7
12
1 1A 14 VAC
2 1Y 13 6A
3 2A 12 6Y
4 2Y 11 5A
5 3A 10 5Y
6 3Y 9 4A
7 GND 8 4Y
DSP BOARD
U102, U105: 74HCU04