A SERVICE OF

logo

SAM SUNG Proprietary-C ontents may change without notice
SGH-I700 Flow Chart of Troubleshooting
2-7
This Document can not be used without Samsung's authorization
5. Microphone Phone
Yes
MicropHone does not work
check the connection
from CN604
Change Main Key F-PCB
No
Audio loopback is
enabled by board test
program.
R449, R451 2.2 V
Resolder R449, R451, R406, R450
Check the pin 22,23 of
U403 != Sine Wave
Hardware Reset or Resodering or
Download Image
END
Yes
Yes
No
No
Yes
EAR-MIC PART
M
I
C
G
N
D
SPK GN D
NC when PIN1 BE LO W
1u H
L402
L401 1u H
AGND
3
4
5
6
7
AGND
EAR401
1
2
180PF
C460
C459
AUDIO33
AGN D
IN
NC
4
6
NO
V+
2
100NF
AGN D
U408
5
CO M
GND
3
1
AGND
R428
0
6.3V
AGND
68 0
AUDIO3 3
C42 6
33UF
AGND
R40 6
AGND AGN D
Z
D
4
1
1
Z
D
4
1
0
AGND
AGND
NC R43 1
C483
C482
220N F
1N F
Z
D
4
0
8
Z
D
4
0
5
Z
D
4
0
6
AUDIO33
R45 6
100K
Z
D
4
0
4
AGND AGND
AGND AGND
R402
AGN D
R403 NC
0
0 R45 5
Z
D
4
0
9
10UF C421
10UF C422
L
4
0
3
8
2
n
H
NC
C46 7
R405
Z
D
4
0
2
C
4
7
6
0
1
N
F
C466
C469
NC
C
4
7
7
NC
Z
D
4
0
3
1
N
F
8
2
0
P
F
R451
C
4
7
5
BAT33 BAT33
4.7K,1 %
1K
R453
20K
R45 2
2
3
1
10K
R45 4
AUDIO3 3
Q401
33U F
C470
680
R450
R449
C465
1U F
4.3K,1 %
MIC-
NC_GND
nRCV_EN
NC_GN D
EAR_MICP
HPOUTL
HPOUTR
JACK_S
SEND_EN D
MICP MIC+