9-6
A0C76BLP
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
J
A
CK CB
A
HOT CIRCUIT. BE CAREFUL.
T601
F502
Q517
Q508
Q516
6
4
5
12
7
9
10
11
2
1
3
Q513
P-ON-H1
T
O
SYSTEM CONTR
OL
BLOCK DIA
GRAM
P-ON-H2
PROTECT1
CN502
CN903
CN904
CN901
38
P
ANEL+12.5V
2
39
P
A
NEL+25.6V
1
28-31
P-ON+3.3V
9-12
5,6
AMP+24V
34,35
11-13
P-ON+6.4V
27-29
23
P-ON+11V
17
25
AL+3.3V
15
37
P
A
NEL-5.5V
3
34,35
P-ON+5V
5,6
8
LINE
FIL
TER
L601
A
C601
A
C
CORD
BRIDGE
RECTIFIER
D614- D617
Q602
Q604
SWITCHING
F601
T4A H 250V
Q601, Q603
SWITCHING
IC602
ERROR
VOLTAGE DET
SWITCHING
CONTROL
VH
1
ZCD
5
OUT
2
FB
3
IS
6
VCC
IC601
1
4
3
2
FEED
BA
CK
Q504
D550
LCD MODULE
ASSEMBL
Y
P
A
NEL+12.5V
2,3
P
A
NEL-5.5V
8
P
A
NEL+25.6V
4
P-ON+3.3V
6,7
P-ON+3.3V
19-21
P-ON+3.3V
13-16
AL+3.3V
10
P-ON+11V
6
P-ON+5V
27-29
P-ON+6.4V
24,26
3
2
4
+24V
AMP+24V
P-ON+5V
AL+3.3V
P-ON+11V
IC502
+12.5V REG.
IC503
+3.3V REG.
IC504
+3.3V REG.
IC501
+5V REG.
+11V REG.
+5V REG.
Q505
SW+25.6V
Q501, Q506
Q503
Q518
Q511
Q510
Q509
Q512
Q502
Q507
SW
-10V
T
O
DIGIT
AL MAIN
CBA CN3701
