Denon AVR-1604, Service Manual

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16
16
AVR-1604/684 / AVC-1580
MM74HCT244
WMX
(IC81
20 1
19 2
18 3
17 4
16 5
15 6
14 7
13 8
12 9
11 10
1G
2G
1A 0
2A 0
2A
3
2Y
0
1Y
0
1Y
3
1A
1
2Y 1
1A
2
2Y
2
1Y
1
2A
1
1Y
2
2A
2
1A
3
2Y
3
GND
V CC
RC1117
-2.5
(IC824)
RC1117
-3.3
(IC823)
1
2
3
2
ADJ/GND
OUT
IN
V
OUT
FRONT VIEW
BA7625 (IC651)
BA7626 (IC652,653)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Monitor OUT
GND
IN5
GND
IN4
CTL E
IN3
CTL D
IN1
CTL A
V OUT1
Vcc
IN2
CTL B
V OUT2
CTL C
6dB
6dB
LOGIC
LOGIC
A B E MONITOR OUT C D E V OUT 1 C D E V OUT 2
L L * IN 1 L L *

L L * IN 1
H L * IN 2 H L * IN 2 H L *

L H * IN 3 L H * IN 3 L H * IN 3
H H L IN 4 H H L IN 4 H H L IN 4
H H H IN 5 H H H IN 5 H H H IN 5
Note 1: * mark means that feasible for either H or L.
Note 2: Each input terminal is provided with sink chip clamp (BA7625).
Each input terminal takes 20kohm at the end (BA7626).
1
4 5
8
2 3 4 5 6 7 8
1
IN
ABLC
C1
C2 GND fo N.C. OUT Vcc
Detector &
Comparator
Integrator
TOP
VIEW
Head
Amp
Limiter
Amp
BPF
BEF Hysteresis
Comparator
CXA1511M (IC 701 )
BD3812F (IC702)
㧗
㧙
14 OUT1
13 OUT2
12 SEL
DGND
MUTE
11
10
DA
V
CC
V
EE
AGND
AGND
AGND
IN 1
9
CL
8 7
6
5
4
2
LOGIC
㧗
㧙
IN 2
3
1