FUNAI LCD-A3206, Service Manual

Page: 26 / 66

7-6
L5920BLP
Power Supply Block Diagram
HO
T
COLD
T601
16 18 13 14 15
1
4 3
2
Q602
SW
-CL
T
5 6
HOT CIRCUIT. BE CAREFUL.
Q603
SW
Q632
SW
3 2
Q601
IC601 IC602
LIMITER
Q631
SW
-CTL
D569
4 3
9
17
1
4 3
2
IC631
2 1
F601 T4A L 125V
LINE FIL
TER
L602
A
C601
A
C
CORD
LINE FIL
TER
L601
L603
BRIDGE RECTIFIER
D610 - D613
T631
14 15 11 16
9
2 7 6 4 3
12 10 13
8
SHUNT
REG.
D509
SHUNT
REG.
Q503
P-ON-H3 P-ON-H2
INV+24V
P-ON-H1
T
O
SYSTEM
CONTR
OL
BLOCK DIA
GRAM
T
O
INVER
TER
BLOCK DIA
GRAM
MAIN CB
A
AL+3.3V AL+9V P-ON+5V(2) +3.3V +33V P-ON+5V P-ON+3.3V
PR
O
TECT
-3
AL+5V P-ON+12V +22V P-ON+1.8V AL+1.5V
Q510
SW +3.3V
Q532
SW +5V
Q502
+9V REG.
Q804,Q805,Q806
SW +22V
IC516
+5V REG.
1
2
4
Q534
Q533
Q801
Q512
IC513
+3.3V REG.
1
2
IC515
+5V REG.
1
3
IC514
+3.3V REG.
1
2
4
IC531
+1.8V REG.
1
2
4
IC532
+1.5V REG.
1
3
Q531
(FEEDBA
CK)
(ISOLA
T
OR)
(FEEDBA
CK)
CAUTION ! Fixed voltage (or Auto voltage selectable) 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.
NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal.
CAUTION ! For continued protection against fire hazard, replace only with the same type fuse.