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Flow Chart of Troubleshooting
10-32
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10-1-7 : Abnormal 3X
5
KEY operation
APPL2
2nd action : KBC(4), KBR(2) close
6
CAMERA KEY
APPL1
2
5
1
8
3
1st action : KBC(3), KBR(2) close
7
LOGIC HIGH
KEY MA
P
CAM_MODE_SW
0
*
4
VOLUME KEY
#
9
LOGIC HIG
H
SHARP
1
2
1
0
0
5
R718
2
2
3
3
4
4
NC
5
6
NC
CN703
1
1
0603
C737
C731
0603
0603
C736
0603
0603
C735
0603
C734
C732
0603
C733
1
0
0
5
V
7
0
3
1
0
0
5
V
7
0
5
DIGIT0
1
2
DIGIT5
1
2
1
0
0
5
V
7
0
6
7
12
TAC_DOW
N
3
456
DIGIT4
1
2
STAR
1
2
Z
D
7
0
9
1
2
DIGIT3
12
TAC_UP
3
4567
DIGIT7
1
2
1
1
2
2
3
3
4
4
TAC_CA
M
CLEAR
1
2
VCC_1.8V
1
0
0
5
R719
L
E
D
7
0
1
APPL702
1
2
2
APPL701
1
1
0
0
5
V
7
0
2
DIGIT1
1
2
2
DIGIT9
1
Z
D
7
0
1
0
1
0
0
5
V
7
0
4
2
DIGIT6
1
1
0
0
5
V
7
0
1
2
1
0
0
5
R723
DIGIT2
1
VDD_KEY_LED_3.3V
1
2
DIGIT8
L
E
D
7
0
2
KBR(1)
KBR(0)
KBR(0)
KBR(2)
CAM_MODE_1
CAM_MODE_2
CAM_MODE_3
KBR(4)
KBR(3)
KBR(2)
KBC(5)
KBC(4)
KBC(3)
KBC(1)
KBC(4)
KBC(2)
KBC(3)
KBC(4)
KBC(0)
KBR(0)
KBC(3)
Press the key
No input allowed?
Check status of volume key & Cam key
NO
YES
KBC# level
goes low to high?
NO
Check idle state level
and neighboring circuit
END
Summary of Contents for I8510
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