Yamaha NS-BP300 Service Manual page 69

A B C
MAIN 4/4
1
REGULATOR
Page 65 G2
to FUNCTION (1)_CB103
0
2
3
5.1
0
0
0
4
0
0 10.1 10.1
5
10.1
6
Page 63 K8 Page 68 D9
to FUNCTION (1)_W301 to MAIN (3)_W801
7
MOTOR DRIVER
0 0
0.6
0.8
8 14.2 0 0
14.2
4.6
VOLUME
4.6
1.0
0.8
0.6
0
9
MAIN (5)
10
D E F
To POWER TRANSFORMER
IC1
AC8.1
0 0
4.9
4.9
0
0
0
7.6
5.1
1.0
4.9
3.8
0.2
5.0
4.9
4.9 1.0
4.1 7.6
0 0.2 4.1
0
0
0
0
0 0
IC2
1.0 1.0 ~
4.2
0
3.9 AC6.9
W51
0
5.0
0.8
0
3
2 4.6
4.6
Page 65
0
1 to FUNCTION (1)_CB109
14.2
0 0 2.5
2.5
0 0
2.5
2.5
Page 68 K7
to MAIN (6)_W851
G H
AC IN
CB2
CB3 CB4
~
~
4.0
0
~ ~
0
7.6
4.0
0 0
~ 0
0
0
0
0
MAIN (4)
IC51: LB1641
Motor driver
3 2 8 10 9 7
VZ
4
B6
INPUT LOGIC
IN 1 5 6 IN 2
GND 1
I J K
IC501
Page 66 D2
to MAIN (1)_W502
CB506
MAIN (8)
L M N
R-840/NS-BP300
IC1: NJM2388F05
Low dropout voltage regulator with ON/OFF control
V
IN V
OUT
Bandgap
Reference
ON/OFF
Cont
control
Over Voltage Thermal Over Current
Protection Protection Protection
GND
IC4: TC4013BP
Dual D-type flip flop
RESET1 4
SET1 6 1 Q1
DATA1 5
2 Q1
CL CL
CL
CL
CLOCK1 3
CL
CL
RESET2 10
Q1 1 14 VDD
SET2 8
13 Q2 2
Q1 13 Q2
DATA2 9
3 12
12 Q2 CK1 Q2
CL CL
4 11
RESET1 CK2
CL
CL
11 DATA1 5 10 RESET2
CLOCK2 CL
CL
SET1 6 9 DATA2
V SS 7
VDD 14 Vss 7 8 SET2
INPUTS OUTPUTS
RESET SET DATA CK Qn + 1 Qn + 1
L H H L
H L L H
H H H H
L L L L H
: Don't care
L L H H L : Level change
L L Qn˙ Qn˙ ˙ : No change
IC501: LM61CIZ
Temperature sensor
★ 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.
69