Yamaha CRX-140 Service Manual page 70

Micro component system speaker
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A
B
C
CRX-040/CRX-140/NS-BP80
MAIN 4/5
1
2
3
4
5
6
7
8
9
10
70
D
E
F
MAIN (2)
A, B models
IC901
CB901
Page 68
B4
to MAIN (1)_CB252
IC902: R1172H121D-T1-F
IC901: BD9870FPS-E2
High stand voltage 1 channel step-down switching regulator
CMOS-based positive-voltage regulator IC
VCC
1
V
DD
VREF
PWM COMP
DRIVER
OSC
CE
STBY
5
STBY
CTL
LOGIC
OUT
2
TSD
OCP
INV
Error AMP
4
SS
FIN
GND
G
H
V
4
5
OUT
Vref
Current Limit
GND
1
2
Pin No.
Symbol
Description
1
CE
Chip Enable Pin
2
GND
Ground Pin
3
NC
No Connection
4
V
DD
Input Pin
5
V
Output Pin of Voltage Regulator
OUT
I
J
K
IC902
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
L
M
N
CB902
To DAB module
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
and must be replaced
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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