Yamaha YSP 1000 - Digital Sound Projector Five CH..., Service Manual

Page: 67 / 92

A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
YSP-1000
SCHEMATIC DIAGRAM (INPUT 2/2)
67
★
All voltages are measured with a 10M
Ω
/V DC electronic 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.
11.5
6.7
11.6
0
6.6
2
3
4
5
1
6.1
6.1
6.1
6
5
7 6.6
6.1
11.6
0
6.1
10.9
11.8
11.8
12.0
11.6 11.8
11.8 11.8
11.8 7.1
11.5
10.9
6.4
10.6
9.8 9.6 8.9
0
2
3
4
8
1
6.1
0
A-1
~
~
~
~
15.4
~
~
~
~
~
~
~
~
~
0
0
5.2
5.2
2.5 2.5
0
15.4 12.0
0
12.0 5.1
12.0 5.1
0
15.4
15.4 12.0
0 -29.4
4.0 3.3 10.4
0
0
0
0
0.1
3.1
0
0.1
3.1
3.3
0.1
0
0
0.1
~
~
~
~
~
~ ~
~
~
~
1.0
~
~
~
~
~
~
~
~
0
10.4 1.2
10.4 0.1
2.5 3.2
~
~
~
~
~
~
~
~
~
~
0
4.0
3.2
0.8
0
4.0 3.2
10.4 4.0
0
-29.4
-24.9
0
-24.3
12.0
0
15.4
15.4
12.0
10.4
4.0
0
5.2
5.2
10.4
5.2
15.4
~
~
~
15.4
~
~
~
~
~
~
~
~
~
~
5.0
4.0
~ ~
AC 3.9
POINT A-1
D521 (C)
AC cable ON
Q504 (C)
AC cable ON AC cable OFF
INPUT (1)
SWITCHING
POWER SUPPLY
RESET
CIRCUIT
INPUT (3)
to POWER CABLE
IC509 : NJM78M05FA
IC510, 511 : NJM78M12FA
Voltage Regulator
INPUT
OUTPUT
COMMON
IC505 : FA3641N-H1-TE1
PMW control IC
REF
FB
5V VCC
EMB
5V REF
0.82V~0.68V
8.5V~7.9V
6.5uA
0.9mA
0.8V
CS VCC
15.5V
15.5V
UVL0
16.5V/9V
OUT
GND
RT IS+
EMB
OUTPUT
R
QB
FF
Q
S
PWM
0.24V
OSC
RM RT
Dmax
70%
3.0V
4V
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
–
–
IC502 : TC4013BP
Dual D-type Flip Flop
4
RESET1
1 Q1
6
SET1
5
DATA1
CL
3
CLOCK1
CL
CL
CL
CL
CL
2
Q1
10
RESET2
13
Q2
8
SET2
9
DATA2
7
VSS
14
VDD
11
CLOCK2
12 Q2
CL
CL
CL
CL
CL
CL
7
2
1 3
4
5
6 8
-
+
Error Amp.
Star
ter
V
o
ltage
Ref
e
rence
Input Short Circuit
Protection
Ov
er Current
Protection
Over Current
Protection
Rush Current
Protection
Thermal
Protection
IN
1
GND
3
OUT
2
IC506 : AN77L04
Low Dropout Voltage Regulator
CATHODE
REFERENCE
ANODE
K A
R
IC507 : NJM431
Adjustable Precision Shunt Reglator
1 5
2
3 4
PIN FUNCTION
1.
OUTPUT
2. GND
3.
+INPUT
4. -INPUT
5. V
+
IC401 : NJM2716F
Single supply single high-slew rate operational amplifier
1
2
3
5 4
7
6
8
1. A OUTPUT
2. A -INPUT
3. A +INPUT
4. GND
5. B +INPUT
6. B - INPUT
7. B OUTPUT
8. V
+
IC402 : NJM2717M
Single supply single high-slew rate operational amplifier
Page 68
to OPERATION (4)_CB301
C3
Page 64
to AMP (2)_W501
M4
Page 65
to AMP (1)_W701
L4
Page 63
to DSP_W1
L3
Page 66
to INPUT (2)_W505
J7
s1
5 k-ohms
10 W
Safety measures
• Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, such as wearing insulating gloves.
• Note that C523 is dangerous even after the power is turned off because an electric charge remains and a high voltage continues to exist there.
Before starting any repair work, perform discharge by connecting a discharge resistor (5 k-ohms/10 W) between C523 terminals.
安全対策
・この製品の内部には高電圧部分があり危険です。修理の際は、絶縁性の手袋を使用するなどの安全対策を行ってください。
・C523には電源をOFFにした後も電荷が残り、高電圧が維持されており危険です。
修理作業前に放電用抵抗（5 kΩ/10 W）をC523の端子間に接続して放電してください。
IR OUT
&6 Q8 2SC1740S (R/S)
2SC3311ARA (Q/R/S)
C501 0.01/100
WE10290
0.01/100
WE10290
X X X