FUNAI LT850-M19 - SERVICE, Service Manual

Page: 32 / 70

9-6
A0CN0BLP
Power Supply Block Diagram
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.
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.
HO
T
COLD
MAIN CB
A
HOT CIRCUIT. BE CAREFUL.
Q602 SWITCHING
CONTR
OL
1
4 3
2
IC605
T601 5
LINE FIL
TER
L601
AC
6
0
1
A
C CORD
BRIDGE RECTIFIER
D602, D604, D605, D607
3 4
19 18 17 16 15 14 13 12
7 8
FEED
BA
CK
Q601
SWITCHING
Q603
CN301 CN302
CN3701
LCD MODULE ASSEMBLY
Q612, Q613
SWITCHING
Q611
SW
-6.8V
Q604
Q608
Q607
Q616
SW+5V
Q605
Q609
SW+11V
Q615
SW+13V
Q606,D671
SW+3.3V
SW+3.3V
F601 T4A H 250V
P-ON-H1
T
O SYSTEM
CONTR
OL
BLOCK DIA
GRAM
P-ON-H2
PROTECT1
Q610
Q617
P-ON+5V AL+3.3V AL+15V P-ON+11V AL+7.5V
13-16
10
27-29
AL+3.5V AL+5.5V AL+3.3V P-ON+3.3V P-ON+5V
DIGIT
AL MAIN CB
A UNIT
P-ON+3.3V
13-16
P-ON+3.3V
6,7
P
ANEL+24V
4
LCD-6.8V
8
P
ANEL+13V
2,3
AL+3.3V
10
24,26 19-21
AL+5.5V
24,26
AL+3.5V
19-21
P-ON+5V
27-29
AL+33V