Yamaha CRX-330 Service Manual page 60
Cd receiver / speakers
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Also See for CRX-330:
- Owner's manual (62 pages) ,
- Service manual (70 pages) ,
- Owner's manual (32 pages)
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A
B
C
CRX-330/NS-BP110/NS-BP100
POWER 1/2
1
2
3
4
5
AC IN
CB1
CB2
CB3
6
IC11: BD9870FPS-E2
High stand voltage 1 channel step-down switching regulator
Primary side ground
VCC
1
7
VREF
PWM COMP
DRIVER
OSC
STBY
5
STBY
CTL
LOGIC
OUT
2
OCP
TSD
INV
Error AMP
4
8
SS
FIN
GND
IC1: L6566BTR
Multi mode controller for SMPS
VREF
SS
AOMP
VFF
10
14
9
15
15 uA
6.4V
TIME
-
OVPL
9
OVP
SOFT-START
OUT
OFF2
LOW CLAMP
1 mA
HV
1
&
+
& DISABLE
FAULT MNGT
7.7V
LINE VOLTAGE
Q
Reference
FEEDFORWARD
VOLTAGE
voltages
REGULATOR
LEB
7
CS
Vcc
5
Internal supply
&
ADAPTIVE UVLO
UVLO
1.5 V
-
+
-
+
+
-
VIn
PWM
OCP
Vcc
Vcc
UVLO_SHF
400 uA
+
FMOD
6
Hiccup-mode
-
-
OCP logic
14V
+
5.7V
BURST-MODE
OCP2
4
GD
OSC
13
OSCILLATOR
R
Q
DRIVER
MODE SELECTION
S
12
&
MODE/SC
TURN-ON LOGIC
TIME
ZERO CURRENT
50 mV
OUT OVPL
-
100 mV
DETECTOR
+
4.5V
ZCD
11
10
OFF2
-
OVP
OVERVOLTAGE
LATCH
PROTECTION
+
8
GIS
IC_LATCH
16
-
AC_OK
AC_FAIL
DISABLE
15 uA
0.450V
+
3 V
UVLO
0.485V
3
GND
60
D
E
F
(133.3)
(0)
(318.9)
(319.2)
(133.5)
(317.8)
(454.7)
(454.6)
(318.5)
(318.5)
(0.8)
(0)
(0.8)
(0.9)
(3.1)
(0)
(5.0)
(0)
(0.2)
(1.1)
(19.4)
(19.4)
(0)
(1.9)
(2.1)
(0)
(0.9)
(1.0)
(3.1)
(318.9)
(19.4)
(0)
IC4: NJM431U
IC13:
NJM7812FA
Voltage regulator
Adjustable precision shunt regulator
INPUT
OUTPUT
1
2
3
REFERENCE
ANODE
CATHODE
COMMON
G
H
I
0
15.3
0
12.1
2.5
0
0
0
0
0
13.1
IC2
(3.1)
(0)
12.1
16.8
0
12.8
IC3
(19.3)
(0)
12.8
0
12.8
0
-12.2
-12.6
-27.4
AC24.7
AC6.6
1.8
13.2
12.6
6.1
2.7
2.9
0
0
2.9
0
0
J
K
L
IC11
16.8
12.0
IC13
12.0
16.8
0
1.8
14.5
14.5
14.5
3.4
13.8
6.9
6.9
0
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
M
N
W1
Page 58
N2
to MAIN (1)_CB216
W2
Page 57
K5
to MAIN (1)_CB205
W3
Page 57
K6
to MAIN (1)_CB206
W4
Page 57
K4
to MAIN (1)_CB209
W5
Page 57
K4
to MAIN (1)_CB210
POWER (1)
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
●
印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、
パーツリストに記載されている部品を使用してください。
● 本回路図は標準回路図です。改良のため予告なく変更することがございます。
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