38
Dolby Pro-Logic
Ò
A/V Receiver JSR-400
INTEGRATED CIRCUIT DIAGRAMS 3
DEM
MOD
16K
SRAM
AUTO
RESET
OSCILLATOR
MAIN CONTROL
DELC
CLOCK
RESET
D1
DO0
DO1
M0
M1
OP1
4.7k
COMP
LPF1
1/2 V
CC
-
-
-
+
+
+
-
-
+
+
4.7k
OP2
LPF2
LPF1IN
LPF1OUT
OP1OUT
OP1IN
OC1
OC2
OP2IN
OP2OUT
LPF2IN
LPF2OUT
XIN
XOUT
REQ
SCK
DATA
IDSW
REF
IDFLAG
TEST1
TEST2
DGND
AGND
NJU9702
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
DIGITAL V
DD
OSCILLATOR INPUT
OSCILLATOR OUTPUT
REQ
SCK
DATA
IDSW
IDFLAG
TEST1
TEST2
DIGITAL GND
ANALOG GND
ANALOG V
CC
LPF1IN
LPF1OUT
OP1OUT
OP1IN
REF
CC1
CC2
OP2IN
OP2OUT
LPF2IN
LPF2OUT
VDD V
CC
DELAY TIME
CONTROL
22
23
21
20
18
17
16 15
14
13
19
2
3
4
5
6
7
8
9
10
11 12 1 24
Main PCB IC11 - (NJU9702) D/S DELAY
Terminal Description
Pin No. Symbol Functions
1
V
DD
Voltage Supply for Digital Block V
DD
=5(V)
11
DGND
Digital GND DGND=0(V)
24
V
CC
Voltage supply for Analog Block V
CC
=5(V)
12
AGND
Analog GND AGND=0(V)
19
REF
Analog Reference Voltage REF=1/2 × V
CC
2
X
IN
Oscillator Input Terminal
3
X
OUT
Oscillator Output Terminal
Connects to 2MHz ceramic Oscillator
4
REQ
Data Request Input Terminal
5
SCK
Serial Data Shift Clock Input Terminal
6
DATA
Serial Data Input Terminal.
7
IDSW
ID Switch (ID Code When Connect to the Common Bus)
8
IDFLAG
ID Flag (Data Input Confirmation and Serial Data Output)
18
CC1
Current Control 1 Modulator
ADM Controller
17
CC2
Current Control 2 Demodulator
9, 10
TEST1, 2
Test Terminal (Normally Connects to the GND)
23
LP1IN
Lowpass Filter 1 Input
Input Side
Constitue a Lowpass
Filter with external C
and R.
22
LPF1OUT
Lowpass Filter 1 Output
14
LPF2IN
Lowpass Filter 2 Input
Output Side
13
LPF2OUT
Lowpass Filter 2 Output
20
OP1IN
OP-AMP 1 Input
Input Side
Constitute an Integrator
with external C.
21
OP1OUT
OP-AMP 1 Output
16
OP2IN
OP-AMP 2 Input
Output Side
15
OP2OUT
OP-AMP 2 Output
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