FUNAI LT850-M32 - SERVICE, Service Manual

Page: 32 / 77

9-6
A0CF0BLP
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
PO
WER SUPPL
Y CB
A
PO
WER SW
CB
A
HOT CIRCUIT. BE CAREFUL.
Q602
SWITCHING
CONTR
OL
1
4 3
2
IC607
T601
TO INVER
TER
BLOCK DIA
GRAM
(CN1900)
CN600 CN601
CN701
2
HO
T
-GND
1
AC
L
2
LINE FIL
TER
L601, L602
AC
7
0
1
A
C
CORD
BRIDGE RECTIFIER
D609- D612
4 3
16 15 10 14
9
13 12 11
6 7
FEED BA
CK
Q601
SWITCHING
Q513, Q522
CN405
CN1001
CN402
CN3701
Q504, Q505
SWITCHING
Q509
SW
-7V
Q503, D506
SW+16V
Q516
Q514
Q511
Q508
Q518
SW+5V
Q521
Q517
SW+9V
Q501
SW+16V
Q510,D526
Q503,D506
SW+3.3V
SW+3.3V
LINE FIL
TER
T602
F601 T4A H 250V
P-ON-H1
T
O
SYSTEM
CONTR
OL
BLOCK DIA
GRAM
P-ON-H2
PROTECT1
Q520
Q525
P-ON+5V AL+3.3V AL+13V P-ON+9V
13-16
12
2
8,9
10
27-29
LCD+16V LCD+6.8V INV+16V LCD+24V P-ON+3.3V AL+3.5V AL+5.5V AL+3.3V P-ON+3.3V P-ON+5V
INVER
TER CB
A
DIGIT
AL MAIN CB
A UNIT
13
LCD-6.8V
13
P-ON+3.3V
13-16
P-ON+3.3V
12
10
LCD+24V
10
INV+16V
2
LCD+16V
8,9
AL+3.3V
10
24,26
19-21
AL+5.5V
24,26
AL+3.5V
19-21
P-ON+5V
27-29
Q405
SW+24V
Q526
AC
-I
N
11
AC
-I
N
22
SW701