Samsung GT-i6220, Service Manual

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Flow Chart of Troubleshooting
9-13
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9-7. Key Data Input
2.9V_LCD
L306
L307
LED_A
D304
1
2
3 4 5 6
L308
6 6
7 7 8 8
9 9
48 48
49
49
5 5
50 50
51
51 52
52
53
53
54
54
40 40
41
41 42 42
43
43 44 44
45
45 46 46
47
47
33 33 34 34
35
35 36
36
37 37 38 38
39 39
4 4
26
26
27
27 28
28
29
29
3 3
30
30
31
31 32
32
19
19
2 2
20
20
21
21 22
22
23
23 24
24
25
25
11 11 12 12
13 13 14 14
15
15 16
16
17 17 18 18
HDC301
1 1
10
10
LED_A
C348
L305
D303
1
2
3 4 5 6
2.9V_LCD
C349
L304
L303
KEY_COL(2)
KEY_COL(1)
KEY_ROW(1)
TSP_X+
TSP_X
LCD_RESET
TSP_Y
TSP_Y+
LCD_FLM
LCD_RD
LED(1)
LCD_D(8)
PONKEY
LCD_D(9)
LCD_D(10)
LCD_RS
LCD_CS
LCD_D(7)
LCD_D(6)
LCD_D(5)
LCD_D(4)
LCD_D(11)
LCD_D(12)
LCD_D(13)
LCD_D(14)
LCD_D(15)
LCD_D(3)
LCD_D(2)
LCD_D(1)
LED(1)
LCD_D(0)
LCD_WR
KEY_ROW(2)
MIC_IN_N
MIC_IN_P
D
3
0
6
4
4
VolumeKey_PA
1
1
2
2
3
3
D
3
0
5
KEY_COL(0)
KEY_ROW(0)
KEY_ROW(1)
Check Initial Operation
Yes
When one of the keys is
pushed,
is it displayed on LCD?
Check the Dome sheet & Key Pad
No
Yes
When one of the keys is
pushed,
KBIO signal is OK?
Replace the Key PBA
No
Yes
END