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T801 SM PS TRA N S
2
4
L801
3
D801...D804
GRAETZ BRIDGE
D R A I N
I801
MOFSET AND
CONTROL IC
SW801
POWER SWITCH
MAIN AC VOLTAGE
I810
controlled rectifier
D821
16
8
D806
C808
4
R806
I804
OCP
3
1
OPTO
FB
COUPLER
C850
CONDUCTING
CONDUCTING
CONDUCTING
C840
HIGH
C841
AROUND
6V dc
D825
R810
I810
C O N T R O L L E D
RECTIFIER
SW I T C H I N G
C I R C U I T
I501
M A I N
1
IC
R870
D811
2
POWER
63
Q811
HIGH
Q810
LOW
Q809
Fig : Power supply operation in stand - by mode
I823 3.3V
1
R E G U L A T O R
AROUND
3.3Vdc
R713
I703 IR
I R I N
64
2
1
R E C E I V E R
61
µ
com
supply
56
voltage
54
F R O N T
K E Y I N
7
M A SK
B U T T O N S
LOW
R888
C888
3
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