Lcd Back-Light Illumination - LG KP110 Service Manual

3.10 LCD Back-light Illumination

LCD backlight LEDs is controlled by AD6724 via AAT3157, U202.
LCD & CHARGE PUMP
MLED
LCD_BACKLIGHT_CTRL
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C221
1u
ECZH0001215
R216
75K
C225 C241 C226
R219
43K
DNI 1u 27p
Figure 3.13 MAIN LCD BACKLIGHT ILLUMINATION
Figure 3-5-3. Charge pump Output Current
3. TECHNICAL BRIEF
VBAT
U202 AAT3157ITP-T1
5 10
IN C1+
9
C1-
7
C2+
8
CP
6
C2-
11
EN_SET
1
D1
2
D2
3
D3
4 12
GND NC
EUSY0238702
2V8_VEXT
- 31 -
C220
ECCH0004904
1u
C222
ECCH0004904
1u
MLED1
MLED2
C223 C224
27p 27p
LGE Internal Use Only