Denon DRA-500AE, Service Manual

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14
DRA-700AE/700AEDAB/500AE
SN74HCT08 (IC 206) AUDIO P.W.B
24LC16B (IC 404) FRONT P.W.B. for 500AE,model
CXA1511M (IC 201) AUDIO P.W.B. for 700AE, 700AEDAB model
NJM2068 (IC 104, 108-113, 120) INPUT P.W.B. for 500AE model
(IC 104-113, 120) INPUT P.W.B. for 700AE, 700AEDAB model
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1A
1B
1Y
2A
2B
2Y
GND
V
CC
4B
4A
4Y
3B
3A
3Y
BLOCK DIAGRAM
24LC16B
A0
A1
A2
V
SS
1
2
3
4
8
7
6
5
V
CC
WP
SCL
SDA
HV GENERATOR
EEPROM
ARRAY
PAGE LATCHES
YDEC
XDEC
SENSE AMP
R/W CONTROL
MEMORY
CONTROL
LOGIC
I/O
CONTROL
LOGIC
WP
SDA SCL
V
CC
V
SS
8 5
1 4
Block Diagram and Pin Configuration
4 6 8
1
2 7 3 5
C1 C2 GND fo N.C. V
CC
OUT
470, 680
0.01µ 0.01µ
V
CC
= 5V
200k
(fo = 40kHz)
Hysteresis
Comparator
Delector &
Comparator Integralor
BPF
BEF Limiter
Amp
Head
Amp
IN
Photo
Diode
ABLC