FUNAI LC5-D32BB - Inverter Circuit; LCD Backlight Inverter Block Diagram

7-6
A73F0BLINV
Inverter Block Diagram
BACK LIGHT
1
2
1
2
1
2
1
2
1
2
1
2
INVERTER CBA
LCD MODULE ASSEMBLY
CN1050 CN1100 CN1150 CN1200 CN1250 CN1300
IS
VS
OVP
CL552A
PROTECT32 BACKLIGHT-PWM
7
BACKLIGHT-ON
6
PROTECT14
IC1500 (COMPARATOR) IC1550 (COMPARATOR)
V-REF
Q1020
DRIVE
2
1
3
13 12
6 5
14
7
IC1001 (INVERTER CONTROL)
IC501 (POWER CONTROL)
2
1
3
13 12
9
10
6 5
14
8 7
9
10
8
V-REF
TO SYSTEM CONTROL BLOCK DIAGRAM (CL552B)
VCC VCC
4 4
Q1002
Q1003
Q1001
T1050
Q1100, Q1101 Q1102, Q1103 Q1250, Q1251 Q1252, Q1253
3
1
4
7 8 6 5
2
T1100
3
1
4
7 8 6 5
2
T1150
3
1
4
7 8 6 5
2
T1200
T501
TO POWER SUPPLY BLOCK DIAGRAM
ACL HOT-GND
3
1
4
7 8 6 5
2
T1250
3
1
4
7 8 6 5
2
T1300
3
1
4
7 8 6 5
2
DRIVE DRIVE DRIVE
DRIVE
INVERTER
CONTROL
10 11 14 15
2 3 4 5 7 8
4 5
23
2
14
3 2
D557
Q551
Q552
IC509
14
3 2
IC510
Q501
Q502
SHUNT
REG
SW
25
3
7 1
POWER
CONTROL
13
11 19
DRIVE
LOGICLOGIC
DRIVE DRIVE
BACK LIGHT BACK LIGHT BACK LIGHT BACK LIGHT BACK LIGHT
Q1701
HOT
HOT CIRCUIT. BE CAREFUL.
12 16
NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal.