9-4
4. Power Supply Block Diagram
PL12.3ABLP
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F600) 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.
HOT COLD
POWER SUPPLY CBA
HOT CIRCUIT. BE CAREFUL.
1
4
3
2
T601
2
LINE
FILTER
FB
L600
CN600
BRIDGE
RECTIFIER
D607- D610
4
3
10
11
12
13
14
15
8
Q601
SWITCHING
Q602
SWITCHING
CN501
CN401
LCD MODULE ASSEMBLY
Q501
Q504
X15
LINE
FILTER
L601
4A 125V
F600
4A/125V
Q651
SWITCHING
Q503
Q506
TO SYSTEM CONTROL
BLOCKDIAGRAM
P-ON-H1
RESET
PROTECT3
P-ON-H2
BACKLIGHT-ADJ
BACKLIGHT-SW
+3.3V REG.
Q502
RESET
11
P-ON+12V
AMP+24V
AL+3.3V
DIGITAL MAIN CBA UNIT
22,23
16,17
P-ON+12V22,23
P-ON+12V16,17
13,14
AMP+24V13,14
LED+24V1-5
BACKLIGHT-ADJ
13
BACKLIGHT-SW
12
AL+3.3V11
CN3701
1
2
Q507
ERROR
VOLTAGE DET
SWITCHING
CONTROL
IC601
IC401
IC602
7
6
2
IS 3
OUT
5
VCC
6
ZCD
1
SHUNT
REG.
AC CORD
AC
INLET
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