FUNAI 19MF339B/F7, Service Manual

Page: 43 / 250

9-9
Power Supply Block Diagram
[22MF339B/F7, LC225SSX]
A9170BLP
HO
T
COLD
MAIN CB
A
HOT CIRCUIT. BE CAREFUL.
Q602
SWITCHING
CONTR
OL
1
4 3
2
IC601
T601
2
LINE FIL
TER
L601
AC
6
0
1
A
C
CORD
BRIDGE RECTIFIER
D601- D604
4 3
11 15 10
9
16 14 13 12
7 6
FEED BA
CK
Q601
SWITCHING
Q631
CN201 CN301
CN3701
Q202,Q203
SWITCHING Q632
Q206
SW
-7.1V
Q402
Q201,D202
SW+13V
Q634
IC631
+3.3V REG.
2
3
Q633
Q638,Q639
Q635,Q636
SW+5V
Q637
SW+5V
Q641
SW+9V
Q640,D662
SW+3.3V
4A/125V
F601 4A/125V
P-ON-H1
T
O
SYSTEM
CONTR
OL
BLOCK DIA
GRAM
P-ON-H2
+5V REG.
PROTECT2 PROTECT1
SWITCHING
INV+31V P-ON+5V AL+3.3V SP+14V TUNER+5V P-ON+9V P-ON+3.3V P
A
NEL+13V
P
A
NEL+15V
19,20 21,22 13,14
P-ON+3V P-ON+7V AL+3.3V P-ON+3.3V P-ON+5V
LCD MODULE ASSEMBL
Y
DIGIT
A
L MAIN CB
A UNIT
P
A
NEL-7.1V
8
P-ON+3.3V
19,20
P-ON+3.3V
6,7
P
ANEL+24.5V
4
P
ANEL+13V
2,3
AL+3.3V
21,22
16 10
P-ON+7V
16
P-ON+3V
10
P-ON+5V
13,14
Q205
SW+24.5V
VCOM
10
VCOM
SW+12.5V
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.
For continued protection against risk of fire, replace only with same type 4 A, 125V fuse.
CAUTION ! : ATTENTION :
Utiliser un fusible de rechange de m
ê
me type de 4A, 125V.
4A/125V
NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal.