Pioneer SD-643HD5, Service Manual

Page: 164 / 206

164
SD533H5, SD-643HD5
34 SDA
—
I
2
C bus signal input
V
IL
max = 1.5V
V
IH
min = 3.0V
V
OL
max = 0.4V
V
CC
4k
34
33 SCL —
I
2
C bus signal input
V
IL
max = 1.5V
V
IH
min = 3.0V
33
V
CC
4k
10k
36
DC OUT —
Outputs the S2-compatible DC
superimposed onto the COUT2
output. The DC is superimposed by
connecting this pin to the COUT2
output via a capacitor.
Control is performed by the I
2
C bus.
When 0V is output, Q1 is ON and
the impedance is 5k
Ω
.
S2 protocol output DC impedance of
10
±
3k
Ω
is realized by attaching
external resistance of 4.7k
Ω
.
DC OUT (bus) Output DC
0 4.5V
1 0V
2 1.9V
3 4.5V
V
CC
100
1k
55
55 TRAP1 3.8V Connects trap circuit for subcarrier.
36
V
CC
4k
28k
1k
Q1
48 MUTE —
Audio signal output mute.
Mute OFF at 1.5V or less
Mute ON at 2.5V or more
Mute OFF when open
V
CC
147
28k
72k
48
50 BIAS 4.5V
Internal reference bias (Vcc/2).
Connects to GND via a capacitor.
V
CC
V
CC
147
20k
V
CC
20k
50
Pin
No.
Symbol
Pin
voltage
Equivalent circuit Description