Power Supply Block Diagram - Philips 21PV375/01/07/39/58 Service Manual

Power Supply Block Diagram

CAUTION !
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F601) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
SW602
POWER F601 L601,L602
T4A/250V
LINE
W601
FILTER
CN601
PS602
DG601
DEGAUSSING
COIL
Q602
SWITCHING
Q603
LIMITER
1-7-25
HOT COLD
D601 - D604 T601
BRIDGE
6 14
RECTIFIER
13
12
4
11
10
2
9
8
1
4 1
3 2
IC601
ERROR
VOLTAGE DET
Q604
FEED
BACK
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T4A/250V FUSE.
TP503 TP504
+B GND
+B
TO
CRT/H.V.
BLOCK
DEF+B
CN602
11 AL+33V
8 AL+9V
7 AL+12V(2)
3 AL+12V(1)
Q605 Q606 2 AL+20.5V
AL+5V
+5V REG. 5
+8V REG. 12 P-ON+8V
6 P-ON-L
Q607
4 P-DOWN-L
Q608
VR601
+B ADJ.
H.V./POWER SUPPLY CBA
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
Q206
Q681
Q683
CN603 CL603B CL603A
AL+33V
11 11 11
AL+9V
8 8 8
7 7 7 AL+12V(2)
3 3 3 AL+12V(1)
2 2 2 TIMER+5V
5 5 5 AL+5V
12 12 12 P-ON+8V
Q682
6 6 6 P-ON-H
(FROM PIN67 OF IC201)
4 4 4
IC681
+5V
JUNCTION-A CBA
REG.
Q684
+5V
REG.
Q686
+5V
REG.
IC301
P-ON-ON
+5.7V
55 39
REG.
MAIN CBA
1-7-26
P-DOWN-L
(TO PIN85 OF IC201)
CM+12V/20.5V
C-POWER-SW
(FROM PIN66 OF IC201)
P-ON+5V(2)
P-ON+5V(3)
P-ON+5V(1)
T6500BLP