Service manual
ABCDEFGH
1
2
3
4
5
6
IJKL
7
8
DVR-S120/NX-P120
76
■ DVR-S120 SCHEMATIC DIAGRAM (MAIN 1/3)
VIDEO_L
(ANALOG IN)
FRONT_L
FRONT_L
REAR_L
REAR_L
CENTER
CENTER
VIDEO_L
VIDEO_L
FRONT_L
10.6
10.3
11.7
0
0
0
0
-7.0
0
7.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
12.1
1.3
0
5.1
5.1
12.1
5.5
5.7
0
0
0
0
0
0
0.2
-12.2
-12.2
-7.0
-7.6
-7.6
0
0
7.9
7.8
7.6
11.7
11.8
0
0
0
0
0.2
0
0
0
0.7
0.7
0.7
0.7
0
12.1
0
0
0
0
0.6
0
0.7
1.6
1.6
2.0
1.7
1.6
1.7
0.3
0.6
0.3
0.9
0
0
1.8
1.1
1.2
0.4
7.1
-7.0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.2
0
0.3
-12.1
-12.1
-12.2
11.8
0
0
0
0
0.1
0
0
7
5
6
2
3
1
4
8
(1)(1)
(1)
X : NOT USED
Page 75
I1
to DIGITAL
Page 79
G4
to SUB (1)
Page 77
A6
to MAIN (1)
Page 79
A5
to SUB (1)
* All voltages are measured with a 10M
Ω
/V DC electronic volt meter.
* Components having special characteristics are marked
Z
and
must be replaced with parts having specifications equal to those
originally installed.
* Schematic diagram is subject to change without notice.
IC122 : NJM2068MD
IC125 : BA15218F
Dual OP-Amp
–+
OUT
1
–IN
1
–V
CC
+V
CC
OUT
2
1
2
3
4
5
+IN
1
–IN
2
+IN
2
–+
6
7
8
IC121 : BD3842FS-E2
Function Switch
24 23 22 21 20 19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
DGND
CL
DA
VEE
GND
VCC
RECA1
RECA2
RECB1
RECB2
OUT1
OUT2
INA1
INA2
INB1
INB2
INC1
INC2
IND1
IND2
INE1
INE2
INF1
INF2
LOGIC
+
–
+
–
+
–
+
–
IC124 : LC72722PM
RDS decoder
+
REFERENCE
VOLTAGE
57kHz
bpf
(SCF)
CCB
TEST
PLL
(57kHz)
ANTIALIASING
FILTER
SMOOTHING
FILTER
RAM
(24 BLOCK DATA)
ERROR CORRECTION
(SOFT DECISION)
SYNC/EC
CONTROLLER
SYNC
DETECT-1
D ATA
DECODER
CLOCK
RECOVERY
(1187.5Hz)
MEMORY
CONTROL
OSC/DIVIDER
VREF
CLK(4.332MHz)
SYNC
DETECT-2
VDDA
VSSD
VDDD
RDS-ID
SYNC
SYR
VSSA
MPX IN
DO
CL
DI
CE
T1
T2
T3
T4
T5
T6
T7
X IN
VREF
FL OUT
C IN
X OUT
3
14
15
19
18
24
1 5 6
4
2
20
21
22
23
7
8
9
10
11 16 17 13 12
IC123 : BD3815KS
Audio Sound Processor
43
44
45
46
47
48
49
50
51
52
53
54
55
56
28
27
26
25
24
23
22
21
20
19
18
17
16
15
42 41 40 39 38 37 36 35 34 33 32 31 30 29
1 2 3 4 5 6 7 8 9 10 11 12 13 14
GOUTFL
VINFL
GOUTFR
VINFR
TNFR
TNFL
BNF1R
BNF2R
BNF1L
BNF2L
GND10
OUTFR
GND9
OUTFL
GND8
OUTSW
GND7
OUTSR
GND6
OUTSL
GND5
OUTC
GND4
OUTSB
VCC
GND3
VEE
VDD
INFRA
INFLA
INSWA
INSRA
INSLA
INCA
INSBA
INFRB
INFLB
INSWB
INSRB
INSLB
INCB
INSBB
GND1
GOUTSW
VINSW
GOUTSR
INVINSR
GOUTSL
VINSL
GOUTC
VINC
GND2
PORTA
PORTB
DA
CL
TONE
A
SW1
B
A
B
LOGIC
A
B
A
B
A
B
A
B
A
B
A
B
A
B
+
–
+
–
+
–
+
–
+
–
+
–
+
–
SW2
A
B
SW3
+
–
+
–
+
–
+
–
+
–
+
–
IC127 : PQ1CG2032FZ
Voltage Regulator
V IN
COM
ON/OFF
O ADJ
V OUT
OVER CURRENT
PROTECTION
CIRCUIT
OVER HEAT
PROTECTION
CIRCUIT
SOFT
START
PWM
COMP.
VOLTAGE
REGULATOR
ON/OFF
CIRCUIT
ERROR
AMP.
S
R
F/F
OSCILLATOR
VREF
1
3
4
5
2
Q