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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
910
GND
1
IN1
2
IN2
IN3
3
4
IN4
OUT1
5
6
OUT2
6
7
OUT3
OUT4
8
F701
F700
9
GNDGND
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_IDMAIN_LCD_RESET
HW_VSYNC
LED+
WE2_N
A2(2)
MLCD_CS_N
LED-
D2(0)
D2(1)