JBL JSR-400, Руководство по обслуживанию

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3 8
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