Power Supply Circuit - Casio SA-5000 Service Manual

5-9. Power supply circuit

AC L
F1
L1
AC N
FG
C5
R11
5
+ +
16 15 14 13 12 11 10
IC1
1 2 3 4 5 6 7
R28
8 7 6
IC2
1 2 3
P2
D12
R35
R37
+
C33
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
A
TR1
R14A R14B D2
L2
B
R2
+ D4
1
C6
D6
SW1
R22
D1
C
3
Z3 +
2
C7
R12A
R12B
D8 +
C8
R8
R24
D7
9
R7
8
P4
P3
C'
R17 D9
P1
D10
8
R32
+
6
C31
5
4
R39
Point Voltage level (V)
C6 DC180 - 190V
C7 DC180 - 190V
R21 Less than 30V (Pulse)
Q1(D-S) 350 - 400V (Pulse)
C24 DC18 - 30V
R31 Less than 30V (Pulse)
Q2 (D-S) 350 - 400V (Pulse)
C31 DC18 - 30V
D61 (K-GND) 20V (Pulse)
D51 (K-GND) 12V (Pulse)
D71 (K-GND) 12V (Pulse)
D81 (K-GND) 20V (Pulse)
D91 (K-GND) 30V (Pulse)
C61 R61
T1
L61
D61
9
C62
L4
C51 R51
Q1
4
L51 L53
D51
10
C52
C71
11
L71
D71
D3 R10 L3 C81
12
L81
D81
D91
T2
A'
L91
+
13
B'
C91 R91
L6
Q2
7
R95
P2
— 28 —
L63
+ +
L54
+ + +
+ +
+
+
L92
+ + +
R56
P1
+
P4
P3
VR51
+12 V
DC+12V
GND
+5 V
DC+5V
GND
GND
DC-5V
–5 V
GND
DC-12V
–12 V
+24 V
DC+24V
GND
P.F
P.G
DC+24V
GND