8-6
A03A0BLP
Power Supply Block Diagram
HO
T
COLD
PO
WER SUPPL
Y CB
A
HOT CIRCUIT. BE CAREFUL.
1
4
3
2
IC607
T601
TO
INVER
TER
BLOCK
DIA
GRAM
(CN1900)
CN610
HO
T
-GND
1
AC
L
2
LINE
FIL
TER
L601A, L602A
AC
6
0
1
A
C CORD
BRIDGE
RECTIFIER
D609- D612
FEED
BA
CK
FEED
BA
CK
Q621
SWITCHING
Q512,
Q522
CN402
CN3701
Q504, Q505
SWITCHING
Q516
Q513
Q514
Q623
Q511
Q508
Q518
SW+5V
Q521
Q517
SW+9V
Q501
SW+12V
Q510,D526
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
P-ON+5V
AL+3.3V
AL+13V
P-ON+9V
13,14
6
10
27-29
LCD+12V
P-ON+9V
AL+3.3V(1)
AL+5V
AL+3.3V
P-ON+3.3V
P-ON+5V
DIGIT
AL MAIN CB
A UNIT
P-ON+3.3V
13,14
P-ON+9V
6
15,16
LCD+12V
15,16
AL+3.3V
10
24,26
19-21
AL+5V
24,26
AL+3.3V(1)
19-21
P-ON+5V
27-29
4
2
3
15
9
13
12
14
11
10
16
8
6
7
8
IC621
SWITCHING
CONTROL
VH
1
ZCD
5
OUT
2
FB
3
IS
6
VCC
Q622
SWITCHING
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
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.
CAUTION !
For continued protection against fire hazard,
replace only with the same type fuse.
