Emerson LD200EM8 - Marker Setup

9-7
LCD Backlight Block Diagram
A7441BLLB
CURRENT CONTROL SWITCH Q421
Q424
T401
CN401
LCD MODULEINVERTER CBA
BACK LIGHT BACK LIGHT BACK LIGHT
OVER VOLTAGE PROTECTOR
Q422,423
1 2
1 2
CN402 CN403
1 2
9 8
3 5
2 6 1 4
10
7
CURRENT CONTROL SWITCH Q441
Q444
T402
OVER VOLTAGE PROTECTOR
Q442,443
9 8
3 5
2 6 1 4
10
7
CURRENT CONTROL SWITCH Q461
Q464
T403
OVER VOLTAGE PROTECTOR
Q462,463
9 8
3 5
2 6 1 4
10
7
OVER VOLTAGE PROTECTOR
Q404
Q406
+10V REG.
OVER CURERENT PROTECTOR
Q425
Q405
SWITCHING SWITCHING
SWITCHING
SWITCHING
INV+22V
TO POWER SUPPLY BLOCK DIAGRAM
BACKLIGHT-ADJ
Q401
SW+22V
TO SYSTEM CONTROL BLOCK DIAGRAM
SWITCHING
Q407