Samsung SGH-P400 Service Manual page 27

SG H- P400 F low Chart of Troubleshooting
AFC
C806
10NF
KEY_COL(4:0)
KEY_COL(4)
KEY_COL(3)
KEY_COL(2)
KEY_COL(1)
KEY_COL(0)
SEND
KEY-XBS KEY-XBS
KEY_ROW(4:0)
12
KEY_ROW(0)
1
KEY-XBS KEY-XBS
12
KEY_ROW(1)
4
KEY-XBS KEY-XBS
12
KEY_ROW(2)
7
KEY-XBS KEY-XBS
12
KEY_ROW(3)
*
KEY-XBS KEY-XBS
12
KEY_ROW(4)
VOSC
13MHZ_BB
R801
10
(From SI4201)
OSC801
4
1
C804
R803
10NF
100
2 3
TCO-9141B(13MHz)
C805
10NF
1 2
CAM_MENU
34 5
END_PWR
KEY-XBS
12
CLEAR T I
KEY-XBS KEY-XBS
12 12 12
1 2
34 5
2 3U P
KEY-XBS KEY-XBS VOL_UP
12 12 12
12
34 5
5 6 DOWN
KEY-XBS KEY-XBS VOL_DN
12 12 12
8 9 LEFT F1
DD-DOM-4PIE
KEY-XBS KEY-XBS
1 2 1 2 12 12
0 SH RIGHT F2
KEY-XBS KEY-XBS KEY-XBS
12 12 12 12
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C801
R818
R800
15PF
0
560
R802
C802
200
30PF
C803
10NF
U802
2
FLIP_SNS_2 OUT
GND
PWR_ON
LED801 LED802 LED804 LED805 LED807 LED808
R806 R807 R808 R809 R810
1502 4 220 24 220
BACKLIGHT_1
3- 16
CLK13M_TR
CLK13M_MC
CLK13M_YMU
CLK13M_RF
VCCD
U803
1
2
VCC FLIP_SNS OUT VCC
C807
GND
100NF
3 3
LED810 LED811
LED813 LED814 LED819 LED820
LED821
R811 R812 R813 R814 R815 R816 R817 R819
24 220 24 150 150 150 150 150
R820
0
VCCD
1
C808
100NF
VBAT
LED822
R821
150
BACKLIGHT_2