Yamaha DVR-S150 Service Manual page 78

A B
DVR-S150/NX-P150
NX-SW150 SCHEMATIC DIAGRAM (MAIN) DVR-S150 SCHEMATIC DIAGRAM (MAIN 3/3)
1
2
0
0
0
-13.7
-21.2
3
-11.8
-10.7
4
5
6
7
8
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78
C D E
Page 79 A6
(1) to SUB (1)
11.6
0
0
0
0
0
-11.6
4.9
-8.3 4.9
MAIN (2)
-7.1
-8.3 4.9
-7.1
-10.3 4.9
-8.1
-10.7
-7.1
-7.1
-13.6
FL DRIVER
-8.2
-21.0
-15.4
-19.1
-11.7
-8.2
-21.0
-19.0
-21.0
34.2
-9.9
-8.1
AC25.2
AC25.2
-34.4
IC1, 2, 7 : KIA4558P
Dual OP-Amp
OUT 1 1 8 +V CC
ÐIN 2 7 OUT
1 2
+ Ð + Ð
+IN 3 6 ÐIN
1 2
ÐV 4
CC 5 +IN 2
F G
Page 75 H1
to DIGITAL
LIMITTER
0
11.6
0
0
0
0
-11.6
4.9 -19.0
-19.1
4.9
-19.1
34.2 11.6
-19.1
PROTECTION
-19.0
1.1
-19.0
-19.0
1.0
-19.0
-19.0
-19.0
-19.1
-17.2
11.0
-11.8 11.6
-6.5
0.6
MAIN (1)
H I
POWER AMP
0
0
Page 79
H5
to SUB (4)
0
0
Page 79
H4
to SUB (4)
-11.6
0
0
0
0.5
0
0
11.6
* All voltages are measured with a 10M /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
IC4 : STK404-050
Power Amp
TR7
TR6
R1
R4
TR1 TR2
R5
TR8
IC221 : LC75712E C2
C1
FL Display Driver
R2
TR5
TR3 D1 R3 R6
TR4
CG 1 AM1
DI 64
ROM 2 AM2
DC
SUB
SHIFT REGISTER
CL 63
1 2 3 4 5 6 7 8 9 10
RAM
CG
CE 62
RAM
35 AM35
36 AA1
ADDRESS ADDRESS AD
VDD
60 37 AA2
REGISTER COUNTER RAM
AA3
38
VSS 57 39 AA4/G16
BLINKCYCLE BLINK
40 AA5/G15
REGISTER GENERATOR
AA6/G14
41
VFL 55
42 AA7/G13
DISPLAY
DISPLAY
43 AA8/G12
REGISTER CONTROL
RES 61 44 G11
G10
45
DUTYCYCLE DUTY
REGISTER GENERATOR
TEST 56
GRID GRID
REGISTER CONTROL
INSTRUCTION
CONTROL
DECODER
53 G2
OSCI 59 TIMING
OSC DIVIDER G1
GENERATOR 54
OSCO 58
IC311 : NJM2904M
IC701 : µPC4570G2
IC312 : TC74HCT00AF
Dual OP-Amp Quad 2 Input NAND
A1 1 14 V
OUT 1 8 +V DD
1 CC
–IN 1 2 7 OUT 2 B1 2 13 B4
+ – + –
0
+IN 1 3 6 –IN 2
Y1 3 12 A4
–V 4 5 +IN
CC 2
A2 4 11 Y4
B2 5 10 B3
0
Y2 6 9 A3
V SS 7 8 Y3
IC275 : PQ1CG21H2F
IC276 : PQ1CG2032FZH
Voltage Regulator
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
* 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.
Z