Samsung GT-B2100 Service Manual page 59

Flow Chart of Troubleshooting
VOUT
C443
LCD_BL_EN
FLASH_EN
10 9
GND GND
LD(7)
IN4 OUT4
4
LD(6)
3 IN3 OUT3
LD(5)
IN2 OUT2
2
LD(4)
1 IN1 OUT1
F501
10 9
GND GND
LD(3) 4 IN4 OUT4
LD(2) IN3 OUT3
3
LD(1)
2 IN2 OUT2
LD(0)
IN1 OUT1
1
F502
10 9
GND GND
LCD_WR
IN4 OUT4
4
LCD_RS 3 IN3 OUT3
LCD_CS IN2 OUT2
2
LCD_RD
1 IN1 OUT1
VBAT
C438
C439
1
OUT
2
C2+
3
AGND
U404
4
FADE
5
FLTMR
TP400
U405
8
7
LCD_FLM
6
LCD_RESET
5
VOUT
LED1
LED2
8
LED3
7
6
5
8
LCD_ID
7
6
5
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C437
15
FL2
14
FL1
13
BL4
12
BL3
11
BL2
R410
R411
C507 C508 C509 C510 C511
D512
10-22
VOUT
TORCH_LIGHT_N
LED3
LED2
LED1
VDD_IO_HIGH_2.9V
LCD500
1
NC
2
VCOML
3
GND
4
FLM
5
_RESET
6
VCC2.8V
7
VCC2.8V
8
VDD1.8V
9
VGH
10
VCOMH
11
VGL
12
A
13
K1
14
K2
15
K3
16
VCI1
17
DB7
18 DB6
19
DB5
20 DB4
21
DB3
22
DB2
23
DB1
24
DB0
25
GND
26
_WR
27
RS
28
_CS
29
_RD
30
GND
31
VDD0
32
NC
C513 C514 C515
C512