LG KG280 Service Manual - Page 37

LCD Back-light Illumination

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3. TECHNICAL BRIEF 3.14 LCD Back-light Illumination LCD backlight LEDs is controlled by AD6720 via AAT3157, U201. LCD Backlight LCD_DIM_CTL VBAT R203 75K C204 R204 NA 43K C203 10u U201 5 IN C1+ 10 ECCH0004904 C201 FB201 MLED BLM15AG100PN1 SFBH0007102 8 CP 11 EN_SET 4 GND 9 C1- 7 C2+ 1u C202 6 1u C2- ECCH0004904 1 D1 D2 D3 2 3 NC 12 AAT3157ITP-T1 C205 C206 1u 27p MLED1 MLED2 MLED3 10V Over ECTH0004807 ECCH0004904 Figure 3-16. MAIN LCD BACKLIGHT ILLUMINATION LGE Internal Use Only - 38 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes

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- 38 -
3. TECHNICAL BRIEF
3.14 LCD Back-light Illumination
LCD backlight LEDs is controlled by AD6720 via AAT3157, U201.
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
10V Over
LCD Backlight
FB201
BLM15AG100PN1
SFBH0007102
C202
1u
ECCH0004904
C204
NA
R203
75K
43K
R204
VBAT
C205
ECCH0004904
1u
27p
C206
GND
4
5
IN
12
NC
U201
AAT3157ITP-T1
10
C1+
C1-
9
7
C2+
6
C2-
CP
8
1
D1
D2
2
3
D3
11
EN_SET
ECTH0004807
C203
10u
1u
C201
ECCH0004904
MLED3
MLED2
MLED1
LCD_DIM_CTL
MLED
Figure 3-16. MAIN LCD BACKLIGHT ILLUMINATION