9-5
5. Power Supply Block Diagram
HO
T
COLD
PO
WER SUPPL
Y CB
A
HOT CIRCUIT. BE CAREFUL.
Q602
SWITCHING
CONTR
OL
1
4
3
2
T601
6
LINE
FIL
TER
L601
CN601
BRIDGE
RECTIFIER
D601- D604
4
5
12
11
10
9
8
1
Q601
SWITCHING
CN631
Q656
Q653
A
C601
A
C
CORD
4A 125V
F601
4A/125V
Q501
SWITCHING
Q652
TO
SYSTEM CONTR
OL
BLOCKDIA
GRAM
P-ON-H2
RESET
+3.3V REG.
Q650
RESET
P-ON+21V
11
P-ON+21V
AMP+13V
AL+3.3V
DIGIT
AL MAIN CB
A UNIT
22,23
16,17
P-ON+21V
7,8
P-ON+21V
1,2
13,14
AMP+13V
10,11
AL+3.3V
13
CN3701
1
2
ERROR
VOLTAGE DET
IC601
2
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 4A, 125V fuse.
CAUTION ! :
ATTENTION :
Utiliser un fusible de rechange de même type de 4A, 125V.
4A 125V
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
PL12.0ABLP