Yamaha CDR-HD1500 Service Manual page 48

A B
CDR-HD1500
SCHEMATIC DIAGRAM (OPERATION 2/2)
1
2
3
4
5
A, B, G models
U, J models
6
Page 49 B2
to OSD (2)
7
# All voltage are measured with a 10MΩ/V DC electric volt meter.
# Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
8
# Schematic diagram is subject to change without notice.
9
48
C D E
AC
19.2
AC
9.9
AC
6.9
AC
15.9
AC
4.7
F G
24.4 12.0
0 24.4
POWER VOLTAGE
SUPPLY REGULATOR
11.1 5.0
11.1
0
10.0 20.9 20.9 11.2
11.9
10.0 20.9
11.9
0
0 6.7
6.7 5.1
5.8
POWER
5.8 1.3
0
SUPPLY
VOLTAGE
REGULATOR
-19.8 0
0
-19.8 -5.0
-19.8 -5.0
-24.8
-19.8
-22.8
8.6
-29.5 -29.5 -28.6
-24.8
-29.2
-29.2
0
5.2 5.1
4.6 9.1 5.1 -4.9
4.6 9.1 5.1
5.2
5.2 5.1
0
H I J
IC500: µPC4570HA
Dual OP-Amp
1 2
- + + -
1 2 3 4 5 6 7 8 9
Vcc Vo 1 -Vm 1 +Vm 1 V EE +Vm 2 -Vm 2 Vo 2 Vcc
IC702: M5237L
Regulator
INPUT 1
ASO
Protection
Starter
Circuit
Sudden Current
Protection
Overheat
Protection
3 OUTPUT
–
Standard Amp.
+
Voltage
2
GND
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
2SA933S 2SB1314
DTC114ES 2SD2394
E
C B
B C
E
S1VB20 M5237L
–
~
1: IN
~
+ 2: GND
3: OUT
ANALOG OUT
K L
IC700~701 : PQ1CG2032FZ
Voltage Regulator
V
IN 1 2 V
OUT
Voltage ON/OFF
regulator circuit
PWM COMP.
5 ON/OFF
+
–
Soft
start
Q
F/F R Oscillator
Over current
S
protection
circuit
ERROR AMP.
– 4 Oadj
+
V
REF
Over heat
protection
circuit
3
COM
IC703: NJM79M05FA
Voltage Regulator
COMMON
OUTPUT
INPUT
1SR139-400 SF5S6 D2SBA20
MTZJ5.1B D3SBA20
MTZJ5.6B
MTZJ11.0A
MTZJ30.0D
Anode
–
~
~
Cathode
+
NJM79M05FA PQ1CG2032FZ µPC4570HA-A
9
3: COM
1
1: OUT
2: IN 1
5
5.1
0
0
0
0
0
0
-5.0