FUNAI LCD-A2006 - LCD Backlight Block Diagram

7-6
L4620BLLB
LCD Backlight Block Diagram
CURRENT CONTROL SWITCH Q321
Q324
T301
CN301
LCD MODULEINVERTER CBA
BACK LIGHT BACK LIGHT BACK LIGHT
OVER VOLTAGE PROTECTOR
Q322,323
1 2
1 2
CN302 CN303
1 2
INV+22V AL+40V BACKLIGHT -ADJ PROTECT-1
9 7
3 5
2 6 1 4
10
8
TO POWER SUPPLY BLOCK DIAGRAM TO SYSTEM CONTROL BLOCK DIAGRAM
MAIN CBA
+22V77
CN404 CN304
+22V66 +22V55 +22V44 +22V88 +22V99
CURRENT CONTROL SWITCH Q341
Q344
T302
OVER VOLTAGE PROTECTOR
Q342,343
9 7
3 5
2 6 1 4
10
8
CURRENT CONTROL SWITCH Q361
Q364
T303
OVER VOLTAGE PROTECTOR
Q362,363
9 7
3 5
2 6 1 4
10
8
OVER VOLTAGE PROTECTOR
Q304
Q306
+10V REG.
OVER CURERENT PROTECTOR
Q325
Q305
PROTECT-133
Q401
Q402
Q403