Samsung GT-E2120 Service Manual page 35

Flow Chart of Troubleshooting
EAR_N
EAR_P
SPK_N
SPK_P
VBAT VCHG_5V
IFC100
HY20-AB0310
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
NC
1005
NC 22
NC 23
24
NC
NC 25
26
NC
27
NC
MIC_BIAS
MIC_N
R209
MIC_P
EAR_MIC_N
EAR_MIC_P
R210
EAR_SW
EAR_SW_REF
R120
L111
L113
L115 R122
L116
L117 R123
JIG_ON_IF
L118
R125
R126
TA_DETECT
R129
ZD104
Digital External Interface- UART
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FM_L
R18
FM_R
W16
W17
T18
U19
V19
C228
U18
R19
T19
W18
W19
P19
N19
KEYIN(0)
EAR_SW_REF
C133
C136
C138
R_ANT
EAR_N
VCM_OUT
EAR_P
EAR_SW
AUX_DET
UART0_TD
UART0_RD
JIG_ON
C147 C149 C150
C148
ZD105
9-12
AUXAUD_IN_R
EAR_OUT_N|R
EAR_OUT_P|L
INTMIC_BIAS
INTMIC_IN_N
INTMIC_IN_P
EXTMIC_BIAS
EXTMIC_IN_N
EXTMIC_IN_P
HSET_OUT_N
HSET_OUT_P
HKSW_DET1
HKSW_DET2
EAR_MIC
R117 C132
C134
EAR_MIC_P
C135
C137
EAR_MIC_N
C139
R119
VDD_3.3V
R124
USB_EN
USB_DP
USB_DM
R128