Digital Signal Block - Sony STR-DE845 Training Manual

IC001
OPTICAL
D/LD
RECEIVER
IC1002
SAT OPTICAL
RECEIVER
IC1003
OPTICAL
T/MD
RECEIVER
J1001
C1007
COAX
22uF
COAX
DVD/LD
R1008
75Ω
Test Disk; YEDS-18
Track 2 (1KHz)
Circuit Description
The Optical inputs are fed into IC1001, IC1002 and IC1003 optical receivers. Here the Pulsing Light signal is
converted to an electrical/digital signal and applied to IC1005/pins 5, 4 and 3 respectively. The signal at this point
is in the S/P DIF format and is shown below in Waveform 6-1.
Oscilloscope Settings;
2V/div
2us
Trigger rising edge
Adjust Hold-off to lock display

Digital Signal Block

R1001
100Ω
5
IN
IC1005
R1002
DIGITAL
100 Ω
INPUT
4
SELECT
IN
R1003
100Ω
3 IN
6 IN
B+
C1020
R1013
47pF
56k
6
R1110
22k
R1009
1k
5
C1010
2pF
FIGURE 6-1 - DIGITAL SIGNAL BLOCK
DATA IN
OUT
7 3
IC1101
DIGITAL
AUDIO
I/F
RECEIVER
DATA
R1011
100Ω
2
IC1007
R1109
WAVE
1MΩ
SHAPER
3
WAVEFORM 6-1
S/P DIF
23
REAR L/R
22
IC1301
CENTER SUB
DOLBY
23
DIGITAL
FRONT L/R
AUDIO
24
DECODER
SAME AS ANALOG
BLOCK CIRCUIT
SDI Aφ
REF. ANALOG
16 84
BLOCK DIAGRAM
R1108
100Ω
R1102
10kΩ
D1101
C1109
0.01uF
6
D SIG
IC1201
SYSTEM CONTROL
3A124 1368
6. Digital Signal Block
10/1/01