Lcd Back-Light Illumination - LG C1100 Service Manual

3.15 LCD Back-light Illumination

In LCD Back-light illumination, there is an charge pump driver in main PCB, which is controlled
by LCD_DIM line from AD6525.
VBAT
C271 C258
18p 1uF
C259
U203
10
IN
2
OUT
1uF
9
LCD_DIM EN_SET
11
GND
Figure 3-30. MAIN LCD BACKLIGHT ILLUMINATION
- 41 -
4
C1+
LCD BACKLIGHT LED
C260
1uF
3
C1-
1
C2+
C261
1uF
12
C2-
8
D1
7
D2
6
C262
D3
5
D4
AAT3123ITP-20-T1
3. TECHNICAL BRIEF
LCD MODULE
IND_LEDG
FB1
VA207
C272
39p
18p