Daewoo DVN-14F6N Service Manual page 40

2. Power circuit (Power supply circuit)
2-1. Abstract And Function
It selects SMPS(SWITCHING MODE POWER SUPPLY) which is possible to put in from AC 108V~132V/60Hz with
SANKEN Ic STR-S5707 and supply the stable voltage which each circuit needs.
The voltage which electric resources circuit supplies is followed.
NO.SUPPLY ELECTRIC
RESOURCES
1 DC 125V
DC 12V
2
(MOTOR 12V)
DC 12V
3
(ON/OFF 12V)
DC 6.0V
4
(EVER 5.3V)
5 DC 14V
6 DC 9V
2-2. I801 STRS-5707
1) BLOCK DIAGRAM
SENS
7
PNP
+2D
R6
R1
R7 R8 R9
SOURCE
TRANS SECOND RECTIFIED
VOLTAGE
D814
REGULATOR IC
I805(PQ12RF11)
REGULATOR IC
I804(PQ12RF11)
REGULATOR IC
I803(KIA7806)
TRANS SECOND
RECTIFIED VOLTAGE
D813
REGULATOR IC
I806 (KIA7809)
VIN
9
OVP
START UP
PRB RBG
T.S.D
C1
SUPPLY CIRCUIT
FBT
PIF
SERVO circuit
TUNER
IF AMP circuit
AUDIO circuit
VIDEO circuit
SERVO, TIMER IC
SYSCON IC circuit
AUDIO circuit
DEFLECTION circuit
LA TCH
OSC
OCP
C2 C4
R2
37
APPLICATION
FBT B
For channel
selecting(33V)
For driving DRUM,
CAPSTAN MOTOR
For channel selecting(9V, 5V)
IF amp. circuit(9V), V/SIF(5V)
For driving AUDIO I/O circuit
For driving VIDEO, ANALOG circuit
For driving SYSCON, TIMER,
SERVO circuit
AUDIO AMP. B
VERTICAL IC B
H. VCC
PROPOTONAL
DRIVE
C3
R5
6
INH
+
+
+
Tr2
DRIVD
8
R3
4
SINK
B
3
Trl
1 C
GND
2
R4
5
OCP