Samsung M8910i Troubleshooting
9. Flow Chart of Troubleshooting
9-1-1.
Power ON
Power On' does not work
'
Check the current consumption
Yes
Current consumption
Check the Vbat Voltage
Voltage
Check the pin of PMIC400
Pin#J12
Pin#A11
P
>= 100
Pin#B7
in#B7
mA
Yes
>=3.3V
Yes
:3.0V
:1.8V
Yes
=1.3V
=1.2V
Yes
No
No
No
Check PMIC400 and L402, L404
No
Yes
Download again
Charge the Battery
Check PMIC400 and C413, C444, L403
Check the clock signal at pin#C5 of PMIC400
Freq
=
32.768khz
Yes
Check the initial operation
END
No
Check the clock generation circuit
relatedtoOSC
(
400)
9-1
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Flow Chart of Troubleshooting
C
4
4
5
C
4
4
4
6
4
4
C
C447
D
4
0
1
OSC802
5
0
1
C
C
C
C
4
4
4
2
1
1
3
9
5
C401
4
5
4
L402
L403
L405
L406
C
C
C
8
2
4
4
0
0
0
4
4
4
0
9
C
R
C406
4
5
3
C
4
4
3
C
2
4
1
L404
C811
C812
C
8
0
5
C813
C
8
0
4
C
0
0
0
4
1
8
C
C
S
O
C
C
5
4
8
8
1
1
0
1
8
8
0
5
R
R
C
C
C
C
C
C
C
4
4
4
4
4
2
2
2
0
3
4
2
1
7
3
0
0
4
C
I
M
P
C414
C
2
4
5
5
4
5
C440
C436
C
AP_DI
C
4
4
4
4
2
2
2
2
7
6
5
0
0
0
L
4
4
0
0
C456
C
4
0
5
4
3
4
C
0
4
3
C
4
3
2
C
C
4
3
5
3
0
R
8
3
2
R
1
U302
4
0
3
R
4
0
6
3
9
9
1
0
8
C
R
8
4
2
0
4
7
4
0
4
C
C
C
4
1
C
4
2
9
4
0
C
R705
D
4
3
C
4
0
4
4
C
0
4
5
C
4
3
C
8
4
4
C
3
0
4
1
0
R
7
D
Z
4
0
9
R
4
R
0
5
C
4
3
1
7
3
4
C
0
0
U
0
0
4
1
R
0
7
6
0
7
R
Q
U
C
4
7
4
2
0
R
2
4
0
8
U
6
0
5
6
0
2
R
C
6
4
0
C
3
2
2
0
3
0
D
U
L
O
V
_
M
A
C
9-2
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Flow Chart of Troubleshooting
9-1-2.
Initial
Initial Failure
Yes
The pin#B6 of
and
1.
V
325
the pin#B3 of
1.8V ?
Is the pin#A14 of PMIC400
Low→High"
"
PMIC400
PMIC400
Yes
?
Yes
=
No
=
No
if it has some problem, it is to be replaced.)
(
if it has some problem, it is to be replaced.)
(
Check the PMIC400
Check the PMIC400
There is
forms at the
The voltage is"High" at the
C415,
LCD display is O.K
Sound is O.K
32.768
C416,
kHz wave
C436
Yes
C426, C427
Yes
Yes
END
and
Yes
C440
No
Check the OSC400
No
Check the PMIC400
No
Check the LCD part
No
Check the Audio part
9-3
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Flow Chart of Troubleshooting
9-4
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Flow Chart of Troubleshooting
9-1-3.
Sim Part
Insert SIM is displayed on the LCD
"
Yes
Check the SIM connector's
T/SIM
(
pin#9,
Is there any signals
connection to
400)
SIM card
Yes
Is there any signals
only pin#10,#11 of
#10,#11
T/SIM
of T/SIM
Yes
400 ?
400 ?
No
No
No
Resolder or change T/SIM
Check the HEA601
Check the U605
400
Yes
Check the voltage at pin#9
of T/SIM
400 >= 2.8V ?
Yes
Is there any signals
only pin#11 of T/SIM
Check the U702
END
400 ?
Yes
Yes
No
Check the PMIC201
No
Check theUCP300
9-5
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Flow Chart of Troubleshooting
4
6
2
4
1
C
9
R
C467
1
4
6
C
4
6
6
C
C465
4
6
4
C
C463
T/SIM400
4
1
0
C
R
R
4
4
1
1
4
7
4
1
6
C
4
1
7
C
R
R
4
4
1
1
5
3
4
1
8
C
1
6
4
R
4
1
1
C
5
1
2
R
R513
5
0
0
D
Z
Z
5
0
1
D
Z
D
7
0
4
7
1
3
C
C712
5
3
4
C
5
3
5
C
8
U
5
0
7
2
8
5
1
6
R
4
1
R
R509
5
0
6
U
5
C
U509
C527
9-6
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Flow Chart of Troubleshooting
9-1-4.
MAIN Microphone Part
Check main microphone function in voice call
receiver mode
No
Check the Voltage at
L613
=1.8V
Yes
Check component soldering
status at
R504, C508, C511 and
Change the Send-end key
C512
Yes
FPCB ass'y
Yes
END
No
Resolder or change UCP300
No
Resolder or change the components
9-7
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Flow Chart of Troubleshooting
9-8
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Flow Chart of Troubleshooting
9-1-5.
Sub Microphone
Check sub microphone function in voice call loud mode
No
Check the connection status
of HEA602
Yes
Check voltage level at
C610
=2.6V
Yes
Check component soldering
R500,R501,R505,C500,C501,
C502,C504,C505,L506 and
status at
L508
Yes
No
Reconnect the HEA602
No
Resolder or change PMIC400
No
Resolder or change the components
Check the connection status
of HEA602
Yes
END
9-9
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Flow Chart of Troubleshooting
9-10
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