Denon AVR-550SD

19
AVR-550SD
KIA7805API (MAIN: IC407) BA7626(VIDEO: IC601,603,607)
KIA7812API (MAIN: IC406)
MM74HC4053MX (VIDEO: IC611~613,705)
NJM2274 (VIDEO: IC610)) BLOCK DIAGRAM
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
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).
C D E V OUT 2
LL* IN 1
HL *

LH* IN 3
HHL IN 4
HHH IN 5
C D E V OUT 1
LL*

HL * IN 2
LH* IN 3
HHL IN 4
HHH IN 5
ABE
MONITOR OUT
LL* IN 1
HL * IN 2
LH* IN 3
HHL IN 4
HHH IN 5
T
T
1
2
V
EE
3
4
5
6
7
8
9
10
11
16
15
14
13
12
Y1
Y0
Z1
Z
Z0
Enable
GND
Vcc
Y
X1
X
X0
C
A
B
X = Don’t Care
Truth Table
Control Inputs
Select
Enable C B A
ONSwitches
L L L L Z0 Y0 X0
L L L H Z0 Y0 X1
L L H L Z0 Y1 X0
L L H H Z0 Y1 X1
L H L L Z1 Y0 X0
L H L H Z1 Y0 X1
L H H L Z1 Y1 X0
L H H H Z1 Y1 X1
H X X X None
Clamp
Disc.
Vref.
750
Ω
1
8
6
7
2
4
3
Bias
Yin
Cin
C mute GND
Vsag
Vout
Vcc
Power Save
5