Arcam AVR300 Service Manual

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AVR300 SURROUND SOUND RECEIVER
IC BLOCK DIAGRAM
2S1
1
V
SS
26
V
DD
27 S1
3S2 26 S2
4S3 25 S3
5S4 24 S4
6S5 23 S5
7S6 22 S6
8S7 21 S7
9S8 20 S8
10S9 19 S9
11S10 18 S10
12S11
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
2S1
1
V
SS
26
V
DD
27 S1
3S2 26 S2
4S3 25 S3
5S4 24 S4
6S5 23 S5
7S6 22 S6
8S7 21 S7
9S8 20 S8
10S9 19 S9
11S10 18 S10
12S11
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
1OUTPUT A
2
A
INVERTING A
3NON INVERTING A
OUTPUT B
INVERTING B
NON INVERTING B4V-
8V+
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 GREE
N
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
11A 14 VAC
21Y 13 6A
32A 12 6Y
42Y 11 5A
53A 10 5Y
63Y 94A
7GND 84Y
DSP BOARD
U102, U105: 74HCU04

Arcam AVR300 Specifications

General

Brand	Arcam
Model	AVR300
Category	Receiver
Language	English