Sony KV-32HS500 Training Manual page 25

DA-4X Main Switching Power Supply Circuit
A-BOARD
CN6701
CN514
1 1
FROM
RY6701&
RY6702
R6710
R6712
R6711
R6714
V-SENSE
2.7V
1
IC6701
R6721 MCZ
3001D
146V
VB
14
D6712
10.6V
10
VC2
+
C6726
6
TIMER
+
C6519
F/B
2
1.9V
G-BOARD
The Main Switching Power supply is basically IC6701 (Switch Regulator Controller). IC6701 contains all the
needed circuitry necessary to function as a switching power supply, except for the Power Switching MOSFETS
(Q6701 and Q6702).
IC6701 contains:
•
Control circuit
•
Oscillator/Oscillator control
•
Output Driver transistors
•
10V regulator
•
Shut-Off Timer
•
Over Current Protection
R6702
L6701
D6702
279V
18
141V
VG
16
Q6701
(H)
136V
VS 15
Q6702
VG
R6728
12
(L)
4.8V
R6729
OCP
R6731
9
VCI
0V
R6730
8
18V
D6715 D6716
+
C6723 + +
C6724
C6727
4
R6732
R6733
3
PH6001
FIGURE 3-7 - DA-4X MAIN POWER SUPPLY CIRCUIT
D6519
R6508
T6703
7
9
275Vp-p
78kHz
1
C6711
2
4
R6713
3
1
+19V
2 4
IC6503
DM-58
11V
CONTROL
5
23
3. Power Supply (DA-4 & DA-4X Chassis)
+
C6560
D6511
18
PS6508
PS6509
17
16
D6515
PS6503
PS6504
15
D6503
D6534
14
D6535
PS6502
13
12
D6518
PS6507
11
D6514
+
10
C6553
R6506
1
R6518
R6505
133V
D6517
36V
36.5V
UNREG
5V
D6502
UNREG
7V
+19V
-19V
UNREG
11V
PS6505
+15V
D6537
-15V
D6538
IC6501
12V
C6525
+135V
33V
CP31P15-3-7 1513 11/6/02