Philips VR109/55 Service Manual page 23

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Power Supply Block Diagram
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
HOT CIRCUIT. BE CAREFUL.
F001
T1.6AL/250V
AC001
L002 D001 - D004
BRIDGE
LINE
RECTIFIER
FILTER
Q002
SWITCHING
CONTROL
Q003
SWITCHING
CONTROL
HOT
1-10-7
06/28/2012
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T1.6AL/250V FUSE.
T001
2 12
13
4 14
15
Q001
(SWITCHING)
16
11
7 17
8 18
IC001
ERROR
VOLTAGE DET
4 1
3 2
REG
Q004
(SHUNT REGULATOR)
CAUTION !
Fixed voltage (or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F001) 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.
MAIN CBA
Q057
SWITCHING
P-ON+12V
Q054
SWITCHING
P-ON+5V
Q056
(SWITCHING)
COLD
1-10-8
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AL+44V
AL+12V
P-ON-L
P-ON+12V
AL+5V
TIMER+5V
P-ON+5V
P-DOWN-L
H67T0BLP