9-8
4. Power Supply Block Diagram
PL12.4BBLP
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.
LCD MODULE ASSEMBLY
HOT COLD
HOT CIRCUIT. BE CAREFUL.
CN601
1
2
AC601
AC CORD
LINE
FILTER
L601
LINE
FILTER
L602
T601
BRIDGE
RECTIFIER
T1602
TO SYSTEM CONTROL
BLOCK DIAGRAM
POWER SUPPLY CBA
DIGITAL MAIN CBA UNIT
F601
4A/125V
1
3
5
6
7
16
1
9
8
13
7
12
8
14
15
13
12
11
10
2
2
5
11
8
T1604
5
6
3
4
15
13
14
12
10
11
2
1
9
10
T1606
2
4
5
7
IC602
14
3 2
Q1602
SWITCHING
Q1601
VCC
SWITCHING
(FEED BACK)
RL601
DRIVE1
3
ZERO
CURRENT
SENS
CURRENT
SENS
VOLTAGE
SENS
ANALOG
DINMING
L1002
DRIVE2
Q1603
SWITCHING
Q1604
SWITCHING
Q601
SWITCHING
SWITCHING
CONTROL
Q602
SHUNT
REG.
IC701
IC1001
SW+3.3V
IC1601
(SWITCHING CONTROL)
(INVERTER CONTROLLER)
SWITCHING
CONTROL
7
11
11612
14
T1601
2
5
11
8
8
IC601
(ISOLATOR)
Q708
Q606
Q605
Q604
Q603
14
3 2
CN1001
CN3601
VBL+55V1,2
AMP+24V
13,14
AL+3.3V11 11
16,17
22,23
13,14
CN701
P-ON+12V
16,17
P-ON+12V
22,23
P-ON-H1
PROTECT3
P-ON-H2
RESET
BACKLIGHT-ADJ
BACKLIGHT-SW
PWM
DIMMING
ENABLE
Q704
Q705
Q1003
Q1001
IC702, Q701
RESET
Q707
SW+5V
Q702, Q703,
Q706
VBL-55V
4,5
VCC+5V
10
CNT+5V
11
PT+2V
12
FB1
13
FB2
14
D616
AL+5V
AMP+24V
P-ON+12V
4A 125V
1 4
L1001
1 4
Q1002
AC
INLET
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