Volume Key; Camera Key - Samsung i8510 Service Manual

Flow Chart of Troubleshooting
10-1-7 : Abnormal 3X 5 KEY operation
Press the key
No input allowed?
NO
KBC# level
goes low to high?
END
KBR(0)
KBR(1)
KBR(2)
KBR(3)
KBR(4)
KBC(0)
KBC(1)
KBC(2)
KBC(3)
KBC(4)
KBC(5)
VCC_1.8V
R723
CAM_MODE_1
CAM_MODE_2
CAM_MODE_3
CAM_MODE_SW
YES
NO
DIGIT3
DIGIT2
3
2
2 1 2 1
DIGIT5 DIGIT6
5 6
2 1 2 1
SHARP DIGIT9
9
#
2 1 2 1
DIGIT0 DIGIT8
0 8
2 1 2 1
STAR DIGIT7
7
*
2 1 2 1
APPL1
DIGIT4 DIGIT1 APPL701
4 1
2 1 2 1 2 1
C73 4
C732 C733
0603
0603 0603
KEY MA P
VDD_KEY_LED_3.3V
NC
CN703 R718
NC
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Check status of volume key & Cam key
Check idle state level
and neighboring circuit
KBC(3)
KBC(4)
APPL2
APPL702 CLEAR
2 1 2 1
C735 C736

VOLUME KEY

0603 0603
1st action : KBC(3), KBR(2) close
2nd action : KBC(4), KBR(2) close
LOGIC HIG H
KBR(2)
R719 KBC(4)
KBC(3)

CAMERA KEY

10-32
LOGIC HIGH
TAC_UP
12
KBR(0)
3 4567
TAC_DOW N
12
KBR(0)
C73 1
3 456 7
0603
TAC_CA M
1
1
2
2
3
3
4
4
C737
0603