Denon DRA-700AE Service Manual page 12

BA7626F (IC601) MAIN P.W.B. for 700AE, 700AEDAB model
Block diagram
Truth table
A B E
∗
L L
∗
H L
∗
L H
H H L
H H H
∗
Note 1: indicates "don't care" (H or L).
M24C64 (IC 404) FRONT P.W.B.
E0 1 8 V CC
E1 2 7 WC
E2 3 6 SCL
5
V SS 4 SDA
Monitor OUT 1
GND 2
IN5
3
GND 4
IN4
5
CTL E 6
IN3 7
8
CTL D
Monitor OUT C D
IN1 L L
IN2 H L
IN3 L H
IN4 H H
IN5 H H
Block Diagram
WC
E0
E1
E2
SCL
SDA
16 IN1
15 CTL A
6dB
logic
14 V
CC
13
V
CC
12 IN2
6dB
logic 11 CTL B
10 V
OUT2
9 CTL C
E V
OUT1
∗
∗
IN2
∗
IN3
L IN4
H IN5
Control Logic
I/O Shift Register
Address Register
and Counter
12
DRA-700AE/700AEDAB/500AE
C D E V
OUT2
∗
L L IN1
∗
H L
∗
L H IN3
H H L IN4
H H H IN5
High Voltage
Generator
Data
Register
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X Decoder