7-6
L4620BLLB
LCD Backlight Block Diagram
CURRENT
CONTR
OL
SWITCH
Q321
Q324
T301
CN301
LCD MODULE
INVER
TER CB
A
BA
CK
LIGHT
BA
CK
LIGHT
BA
CK
LIGHT
OV
E
R
V
O
LT
A
G
E
PR
O
T
ECT
O
R
Q322,323
1
2
1
2
CN302
CN303
1
2
INV+22V
AL+40V
BA
CKLIGHT
-ADJ
PR
O
TECT
-1
9
7
3
5
2
6
1
4
10
8
TO
PO
WER
SUPPL
Y
BLOCK
DIA
GRAM
TO
SYSTEM
CONTR
OL
BLOCK
DIA
GRAM
MAIN CB
A
+22V
77
CN404
CN304
+22V
66
+22V
55
+22V
44
+22V
88
+22V
99
CURRENT
CONTR
OL
SWITCH
Q341
Q344
T302
OV
E
R
V
O
LT
A
G
E
PR
O
T
ECT
O
R
Q342,343
9
7
3
5
2
6
1
4
10
8
CURRENT
CONTR
OL
SWITCH
Q361
Q364
T303
OV
E
R
V
O
LT
A
G
E
PR
O
T
ECT
O
R
Q362,363
9
7
3
5
2
6
1
4
10
8
O
V
ER V
O
LT
A
G
E
PR
O
TECT
O
R
Q304
Q306
+10V REG.
O
V
ER CURERENT
PR
O
T
ECT
OR
Q325
Q305
PR
O
TECT
-1
33
Q401
Q402
Q403
Summary of Contents for LCD-A2006
Page 1: ...SERVICE MANUAL 20 COLOR LCD TELEVISION LCD A2006 LCD B2006 LCD C2006 LCD D2006 ...
Page 9: ...8 3 L4620SCM1 Main 1 4 Schematic Diagram ...
Page 13: ...8 7 Function Schematic Diagram L4620SCF ...
Page 14: ...8 8 L4620SCINV Inverter Schematic Diagram ...
Page 15: ...8 9 L4620SCL1 LCD Main 1 2 Schematic Diagram ...
Page 16: ...8 10 L4620SCL2 LCD Main 2 2 Schematic Diagram ...
Page 20: ...8 14 Inverter CBA Top View Inverter CBA Bottom View BL2500F01021 ...
