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Flow Chart of Troubleshooting
9-3
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9-1-2. LCD Part
LCD displays nothing
YES
NO
TA600 is 'High'?
Check U602
YES
Is there any signal at
HDC700 #3,
F700: pin #6, #7, #8 ?
Change the LCD module
NO
YES
END
TA600
TA601
VBATT_4.2V
VIN
1
VOUT
EN
3
GND
2
GND
5
6
NC
4
U602
VBATT_LCD
RESET_N
8
9 9
31
31
32 32
33
33
34
34
4
4
5
5
6
6
7
78
24 24
25 25
26 26
27 27
28
28
29 29
3 3
30
30
17
18
18
19 19
2
2
20 20
21 21
22 22
23 23
1
10
10
11 11
12
12
13 13
14
14
15 15
16
16
17
HDC700
1
R702
V_MSMP_2.6V
OUT2
OUT3
7
8
OUT4
GND
9
10
GND
1 IN1
2 IN2
IN3
3
4 IN4
OUT1
5
6
OUT2
6
7
OUT3
OUT4
8
F701
F700
9
GND
GND
10
IN1
1
IN2
2
3 IN3
IN4
4
5
OUT1
D
IN1 1
IN2 2
3
IN3
IN4 4
R711
D2(2)
D2(3)
LCD_ID
MAIN_LCD_RESET
HW_VSYNC
LED+
WE2_N
A2(2)
MLCD_CS_N
LED-
D2(0)
D2(1)
Summary of Contents for SGH-F480
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