Emerson EWL20S5 - Page 24

7-6
LCD Backlight Block Diagram
L2601BLLB
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
9 7
3 5
2 6 1 4
10
8
TO POWER SUPPLY BLOCK DIAGRAM
MAIN CBA
AL+21V77
CN404 CN304
AL+21V66 AL+21V55 AL+21V44 AL+21V88 AL+21V99
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