Yamaha CDR-HD1000 Service Manual page 30

A B
CDR-HD1000
SCHEMATIC DIAGRAM (OPERATION 2/2)
1
Q Q
3 7 6 3 1 5 1 5 0
2
3
FROM OPERATION (5)
E-36/J-34
D7
4
T E
L 1 3 9 4 2 2 9 6 5 1 3
5
6
7
w w w
8
9 E-37/J-35
C D E
AC
19.2
AC
9.9
AC
6.9
AC
15.9
AC
4.7
x a o
. i
F G
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10.1
24.4
12.0
0 24.4
10.1
VOLTAGE
POWER
REGULATOR
SUPPLY
4.6
11.1
5.0
0 11.1
4.6
10.0 20.9
10.0 20.9
3.3
0 6.7 6.7 5.1
5.8
3.2
5.8 1.3
POWER
0
SUPPLY
Q VOLTAGE Q
-10.0
3 7
REGULATOR
-19.8 0
-10.0
0
R765
-19.8 -5.0
220
-19.8 -5.0
-24.8
-19.8
-22.8
-29.5 -29.5 -28.6 8.6
-24.8
-29.2
-29.2
0
4.6 9.1 5.2 5.1
5.1 -4.9
5.1
4.6 9.1
5.2
5.2 5.1
0
u 1 6 3
y
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H I
2 4
8 9 9
20.9 11.2
11.9
11.9
0
6 3 1 5 1 5 0 8 9
m
c o
.
J K L
2
8 9 9
IC700~701 : PQ1CG2032FZ
Voltage Regulator
V 1 2 V
IN
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
Over heat REF
protection
circuit
3
COM
IC702: M5237L
Regulator
INPUT 1
ASO
Protection
Starter
Circuit
Sudden Current
Protection
Overheat
Protection
3 OUTPUT
–
Standard Amp.
Voltage +
2
GND
IC703: NJM79L05A-T3
Voltage Regulator
INPUT
1
2
OUTPUT
COMMON
3
2 4 9 8 2 9 9
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
2SA933S 2SB1314 1SR139-400 SF5S6 D2SBA20
2SD2394 MTZJ5.1B D3SBA20
MTZJ5.6B
MTZJ11.0A
MTZJ30.0D
Anode
–
E
C B ~
B C ~
Cathode
E
+
S1VB20 M5237L NJM79L05A PQ1CG2032FZ
–
~ 1: Common
1: IN
~
2: Input
+ 2: GND
3: OUT 3: Output 1
5
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.
Schematic diagram is subject to change without notice.