Philips CDR785/00 Service Manual page 36

6-5
BLOCK DIAGRAM
SWITCHED MODE POWER SUPPLY / WorldWide version
Lightning
L101, L102
Protection
F101
T2A
EMI-filter
CN101
MAINS SOCKET
PWM CONTROLLER
IC101
Vcc
Q
out
5
BUFFER
OVERVOLTAGE
PROTECTION
PWM
8 on/off
BIAS
7
1
Blockdiagram SMPS CDR785WW, 040300
R152
C105
22V
Q152
PC102
switch on/off
22V
3
S
I sense
R
6
Vcc
4
22V
GND
feedback
2
PC101
regulation
T102
D251
switching D252
transistor
C251
6,8V
Q151
overvoltage
protection
reference
PC151
regulation
IC251
T101
D201
D206
switching
transistor
C202
15V
Q101 overvoltage
protection
D202
C201
D203
C204
Q202
D204
C205
R209
C206
D205
reference
+5V
IC201
6-6
+5V EVER
CON1
Q251
ON/OFF
1
+5V EVER
-F1
+F1
-38V
+5V
+12V
+12V
+5V -8V
11
-8V
-30V
+F
-F
CON2
+5V
7
+5V
+12V
-8V
1