Yamaha DVX-S120 Service Manual page 76

A B
DVR-S120/NX-P120
DVR-S120 SCHEMATIC DIAGRAM (MAIN 1/3)
1 Q Q
3 7 6 3 1 5 1 5 0
2
X : NOT USED
10.6
3
10.3
4
T E
L 1 3 9 4 2 2 9 6 5 1 3
VIDEO_L
5
0
0
0
0
0
0
6
0.1
0
-12.2
7
0
0
-12.1 -12.1
0 0
w w w
8
76
C D E
11.7
0
0
0
-7.0
0
VIDEO_L
7.1
0
0
0
0
0
0.2
0
0.2
0
0
0
FRONT_L
0
11.8
0
0.3
0
x a o
. i
http://www.xiaoyu163.com F G
11.7
7.8
7.6
-12.2
8
5
7
0
6
0.2
0
Q Q
3 7
2
0
1
3
0.2
0
4
11.8
0
0.6
0
1.2
0
1.1
0
0.4
0
7.1
0
-7.0
u 1 6 3
y
http://www.xiaoyu163.com
H I
2 4
8 9 9
VIDEO_L
(ANALOG IN)
FRONT_L
CENTER
REAR_L
-12.2
-7.6
0 0
7.9
-7.6
-7.0
0
0.7
0
0.7
0
0
0
0.7
0
0.7
6 3 1 5 1 5 0 8 9
0
0
FRONT_L
CENTER
REAR_L
5.5
0
12.1
5.1
5.7
0
m
c o
.
* 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.
J K L
IC124 : LC72722PM
RDS decoder
2
8 9 9
1 5 6
VDDA 3 + CLOCK 14 VDDD
PLL
RECOVERY
REFERENCE (57kHz)
(1187.5Hz)
VOLTAGE
VSSA
4 15 VSSD
VREF
57kHz
ANTIALIASING SMOOTHING DATA
MPX IN 2 bpf 19 RDS-ID
DECODER
FILTER FILTER
(SCF)
DO 20
CL 21 18 SYNC
RAM ERROR CORRECTION SYNC/EC
DI (24 BLOCK DATA) (SOFT DECISION) CONTROLLER
22 CCB 24 SYR
CE 23
CLK(4.332MHz)
T1 7 MEMORY
T2 CONTROL
8 TEST SYNC SYNC
T3 9 OSC/DIVIDER DETECT-1 DETECT-2
T4 10
11 16 17 13 12
Page 75
I1
to DIGITAL
IC121 : BD3842FS-E2
Function Switch
24 23 22 21 20 19 18 17 16 15 14 13
LOGIC
1 2 3 4 5 6 7 8 9 10 11 12
IC122 : NJM2068MD
IC125 : BA15218F
Dual OP-Amp
OUT 1 1 8 +V CC
–IN 2 7 OUT
1 2
+ – + –
+IN 1 3 6 –IN 2
–V CC 4 5 +IN 2
2 4 9 8 2 9 9
Page 79
G4
IC123 : BD3815KS
to SUB (1)
Audio Sound Processor
42 41 40 39 38 37 36 35 34 33 32 31 30 29
TONE
INFRA 43 28 GND8
INFLA 44 27 OUTSW
SW1
+
A
INSWA 45 – 26 GND7
+
B
–
INSRA 46 25 OUTSR
Page 77 +
A
–
B +
47 24
A6 INSLA – GND6
48 + 23
to MAIN (1) INCA A OUTSL
–
+
B
–
INSBA 49 22 GND5
SW2
+
A –
INFRB 50 21 OUTC
A +
B
B
–
INFLB 51 + 20 GND4
A –
A
B +
INSWB 52 19 OUTSB
B –
+
SW3
–
INSRB 53 A 18 VCC
+
B
A
–
+
INSLB 54 B 17 GND3
–
A
B
INCB 55 16 VEE
INSBB 56 15 VDD
LOGIC
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Page 79
IC127 : PQ1CG2032FZ
Voltage Regulator
A5
to SUB (1)
V IN 1 2 V OUT
VOLTAGE ON/OFF
REGULATOR CIRCUIT
PWM 5 ON/OFF
COMP.
SOFT
START
OVER CURRENT Q
PROTECTION
F/F R OSCILLATOR
CIRCUIT 4 O ADJ
S
ERROR
AMP.
VREF
OVER HEAT
PROTECTION
CIRCUIT
3
COM