Samsung DVD-A500 Service Manual page 50

6-1-3 Internal Block Diagram
6-1-3 (a) Internal Block Diagram of S.M.P.S. Circuit
Smoothing
Circuit
(SNUBBER)
Rectified Circuit
PWM Control
Circuit
Line Filter
(1L0380)
Power IN
(85~265V)
6-1-3 (b) PIC1 (STR-G6153T) Internal Block Diagram
6.3V
2uA 1mA
4
Feedback
5v
Reset
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Noise
Converter
Removal
Voltage
Detection
Circuit
+
_
Sync.
Vck
OSC.
2.5R
R
Voffset
Rsense
+
_
7.5V
Thermal
Protection
OVP
Fig. 6-10
FLT Driving
Circuit
3.3V Rectified
Smoothing Circuit
5V Rectified
Smoothing Circuit
8V Rectified
Smoothing Circuit
-8V Rectified
Smoothing Circuit
Fig. 6-9
V c c
5
Voltage
32V
UVLO
Ref.
S
Q
R
LEB
Sense
Reset
S
Q
R
2
O C P
Circuit Descriptions
3.3V Rectified
VoltageCircuit
5V Rectified
VoltageCircuit (x2)
Motor 8V
1 Port
8V Rectified
VoltageCircuit
-8V Rectified
VoltageCircuit
1
Drain
Source
3
GND
Sense Sense
FET
Control IC Control IC
O
U
T
P
U
T
6-5