3. TECHNICAL BRIEF
- 35 -
3.13 LCD Back-light Illumination
LCD backlight LEDs is controlled by AD6720 via AAT3157, U404.
WHITE_LED LDO
R412
20K
1u
C421
C420
1u
C419
1u
U404
10
C1+
C1-
9
C2+
7
C2-
6
8
CP
D1
1
2
D2
D3
3
11
EN_SET
4
GND
IN
5
12
NC
AAT3157ITP-T1
1u
C417
C418
1u
FB400
VBAT
100K
R499
C450
NA
MLED1
MLED2
LCD_DIM_CTL
MLED
Figure 3-16. MAIN LCD BACKLIGHT ILLUMINATION
Summary of Contents for KG225
Page 1: ...Date April 2006 Issue 1 0 Service Manual Model KG225 Service Manual KG225 M O B ILE CAM E R A ...
Page 3: ... 4 ...
Page 19: ...3 TECHNICAL BRIEF 20 Figure 3 4 SYSTEM INTERCONECTION OF AD6720 EXTERNAL INTERFACE ...
Page 66: ...4 TROUBLE SHOOTING 67 4 12 KEY backlight Trouble Q300 R359 TEST POINT Figure 21 ...
Page 79: ... 80 5 DOWNLOAD B Multi Download Procedure 1 Run GSM Multi Download program and select Setting ...
Page 84: ... 85 6 BLOCK DIAGRAM 6 BLOCK DIAGRAM ...
Page 85: ... 86 ...
Page 92: ... 93 KG225 8 PCB LAYOUT ...
Page 93: ... 94 KG225 8 PCB LAYOUT ...
Page 101: ... 102 10 STAND ALONE TEST Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Page 109: ... 110 ...
Page 125: ...Note ...
Page 126: ...Note ...