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Level
8a.
a-1. Block Diagram
8
3
Repair(HW REV0.8)
8-1
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Level3Repair
a-2. PCB Diagrams
8
a-2-1. Top
8
8-2
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a-2-1. Bottom
8
Level3Repair
8-3
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Level3Repair
a-3. Flow Chart of Troubleshooting
8
Equipments
Power Supply
Oscilloscope
Digital Multimeter
driver, Tweezer
+
8-4
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Level3Repair
8a-3-1.
Power On
Power On'does not work
'
Check the Battery Voltage
is more than
check current consumption
Check U503(PMIC) and
C518
(
C520>1.8V, C522,>
>=100
Power on voltage
V, C519
>1.2
>1.8
Yes
Yes
mA
Yes
V)
3.3V
1.2V
>1.1
V,
C529
No
No
No
Check the problem point(short, open, crack etc)
Change the Battery
Because of batt. power low)
(
Download again
and If PMIC has problem, change U503
Yes
Check Resistance Values of
C230, C231, C518, C554. Are
the values are less than
check the initial operation
ohm?
No
Check the Clock at
OSC501 that
Frequency is
Yes
Yes
END
100
32K
Yes
No
Replace capacitor or capacitors that has/have less
than
Resolder or Replace OSC501, C517 and
ohm resistance.
100
C539
8-5
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Level3Repair
8-6
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Level3Repair
8-7
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Level3Repair
8a-3-2.
Initial
Initial Failure
Yes
The pin
swing properly
The pin
swing properly
AP_PS_HOLD(TP501) and
AP_N_RST_IN(R507)
lowHigh"?
"
There is
32.768
at OSC200 and OSC501
of U206
#1,2
1.8V
of U206=
#11,12
2.8V
Yes
Yes
KHz wave forms
Yes
=
and0V?
and0V?
=
No
check U206 and UCP400 and related parts(short,
No
if U503 has some problem, it is to be replaced)
(
No
Check U503(crack, open, etc)
Replace OSC
crack, etc)
200
and OSC501
R233
There are24MHz wave forms at
OSC400 and26MHz wave forms
at OSC100(C128)
LCD display OK?
Sound is OK?
>= 1.8
END
V?
Yes
Yes
Yes
Yes
No
Check UCP200 and related parts(short, crack,
No
Replace OSC
No
No
Check the LCD part(short, crack, etc)
Check the Audio Part(short, crack, etc)
etc)
and OSC100
400
8-8
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Level3Repair
8-9
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Level3Repair
8a-3-3.
Charging Part
Check IFC300 pin#1whether
voltage reading is greater than
Check U503 DCIN whether
Abnormal charging part
Yes
4.9V
Yes
is measured
C502)
(
Yes
5V
No
No
Check the TA
TA may not be connected properly)
(
Resolder or Replace U301
Battery is charging?
Yes
END
No
Resolder or Replace U503
8-10
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Level3Repair
8-11
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Level3Repair
8a-3-4.
Sim Part
NO SIM
Yes
Check the connection of
the HEA301
Yes
Check the Sub PCB
Yes
END
No
Reconnect the Sub PCB
T_FLASH_D(0)
T_FLASH_D(2)
T_FLASH_DETECT
SPK_OUT_R_P
SPK_OUT_R_N
R330
VTF_2.8V
HEA301
1
3
5
7
9
111112
15
C
C
N
N
7
8
1
1
5
U
C539
C517
1
0
5
P
T
C553
C
3
2
C
9
2
8
C
3
4
3
0
V
3
1
6
2
2
4
4
6
6
8
8
10
10
12
C
C
N
N
0
9
1
2
C
5
1
L502
9
C
5
1
L501
8
R
R
4
4
3
3
5
7
R
R
4
4
2
2
C508
2
4
C
C
C
5
5
5
0
0
5
6
9
4
R
3
5
0
5
U
3
0
SC610
1
3
5
7
9
13 13 14 14
15 1616
C330
V307V306 V310
C329
C
3
3
9
C
5
3
C533
7
R326
R327
C336
C337
C
3
3
3
C338
U
3
0
C340
7
R328
R329
R340
R331
R
6
0
4
L
6
C
0
6
1
0
V311
1
V312
U
6
V310
0
R
C
1
6
2
0
0
1
8
R603
0
3
C532
C536
C
C
C538
C
5
5
3
5
3
4
5
0
C
4
3
3
2
C501
C
C
C503
5
5
OSC501
2
2
2
3
R501
1
0
3
A
V308
E
V307
H
V306
V309
CP_VSIM_1.8VVCC_2.8V_PDA
T_FLASH_D(1)
T_FLASH_D(3)
T_FLASH_CLKT_FLASH_CMD
SIM_RST
SIM_CLK
SIM_IO
AP_JTAG_EXTRST
V311V309
V312V308
R
R
R
4
4
4
3
3
3
4
8
3
R
R
R
4
4
4
2
2
2
5
9
8
C
4
C
1
4
5
1
0
C
4
1
3
C541
R468
R467
C542
V316
8-12
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Level3Repair
8a-3-5.
Microphone Part
Check main microphone function
in voice call receiver mode
Yes
Check Sub-Touch Module
FPCB where main Mic is
placed for any damage(Tear
in FPC, etc)
Yes
Check the voltage at C267
2.8V
No
=
No
Change the Sub-Touch Module
Resolder or replace U210
Yes
Check component soldering
statuses of C281, C282
Yes
END
No
Resolder or replace C281, C282
8-13
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Level3Repair
8-14
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Level3Repair
8a-3-6.
Speaker Part
Play MP3 with maximum volume level.
Check speaker function.
Yes
Check the connection of
HEA301
Yes
Check signals on L209,
L210
Yes
No
No
Reconnect HEA301
Resolder or replace U207
Replace the speaker
module
Yes
END
Yes
Check signals on
L209, L210 again
No
Replace UCP400
8-15
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Level3Repair
8-16
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Level3Repair
8a-3-7.
Receiver Part
Check receiver function in voice call receiver
mode
Yes
Check the signals at ZD307,
Check the signals at ZD307,
Check the connection of
ZD308
Yes
ZD308 again
Yes
HDC302
No
No
No
Resolder or replace U207
Resolder or replace UCP200
Reconnect HDC302
Yes
Replace the Receiver-Earjack
Ass'y
Yes
END
8-17
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Level3Repair
8-18
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Level3Repair
8a-3-8.
BT/WIFI
Check the Voltage on C162
BT/WiFi is not working
Check BT or WiFi function
Check
ON
Yes
2.8V
Yes
MHz Clock at
38.4
C177
Yes
No
=
No
No
etc.(If U503 has some problem, it needs to
Enable BT or WiFi Function
Check AP PMIC(U503) for Crack, Open or
be replaced)
Check OSC
102
heck the Voltage on L113
C
Check the Status of C138,
Resolder or Replace U105
1.2V
Yes
L124, ANT106
Yes
Yes
END
=
No
No
Resolder or change L113
Resolder or Replace C138, L124, ANT106
8-19
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Level3Repair
8-20
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Level3Repair
8a-3-9.
FM RADIO
Check the Audio Signal at
Check the Audio signal at
FM Radio does not work
Yes
Check the connection of
HDC302
Yes
L302, L303
Yes
C250, C251
No
No
No
Connect Earjack Ass'y correctly to HDC302
Check Earphone
Check Audio Codec IC(U207)
Yes
CChange U104
Yes
END
8-21
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Level3Repair
8-22
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Level3Repair
8a-3-10.
LCD
LCD is still off after PWR ON
Check the connection of
Check the soldering status of
Check VCC_3.0V_LCD
3.0V (
1.8V (
HDC300
EMI Filters F300~F305
C537), VLCD_1.8V
C307), V_BAT
C308)
(
Yes
Yes
Yes
=
=
>3.4V
No
No
No
Reconnect the HDC300
Resolder EMI Filters
Check PMIC(U503)
Yes
Replace LCD Module
Yes
END
8-23
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Level3Repair
8-24
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Level3Repair
8a-3-11.
TSP
Touch Screen does not work
Yes
Check LCD Connector on
Main PBA
Yes
Check the TSP Connector on
LCD Module
U300 Pin
C310) and Pin
6=2.8V(
C306, C344)
(
Yes
C305,
8=3.3V
No
No
No
Reconnect the HDC300
Reconnect TSP Connector
Resolder or Replace U300
Yes
Replace LCD Module
Yes
END
8-25
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Level3Repair
8-26
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Level3Repair
8a-3-12. 5M
CAM
Camera" function does not work
"
Yes
Check the Camera
connector on Main PBA
Yes
Check the voltage
C531,C533,C535
C534, C536
C532, C521
C352
=1.8
=1.2V
=2.8V
=2.8
V,
No
V,
No
Reconnect the HDC301
Resolder U503, U303 or change PBA
Yes
Check F308 Pin1is24MHz
Yes
Replace the camera module
END
No
Check UCP400 related to24MHz
8-27
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Level3Repair
T
T
T
L
NI
NI
NI
N
G
T
T
V
A
H
O
C
C
O
A
A
B
C
M
D
D
C
I
B
B
T
T
V
V
E
T
D
A1
A
B
BUCK1
IN1
A2
IN1
E1
IN2
BUCK2
E2
IN2
H1
IN3
BUCK3
H2
IN3
K2
IN4
BUCK4
K8
LDO4,5,7
IN5
K9
IN5
C9
IN6
LDO11,12,13
D9
IN6
A7
IN7
LDO14,15,16
B7
IN7
G9
LDO6,8,9
IN8
H9
IN8
B9
IN9
LDO2,3,10,17
B8
LDO2
C8
LDO3
K10
LDO4
U503
4
D
N
C
C
G
N
N
P
4
2
1
K
J10
LDO5
H10
LDO6
K7
LDO7
G10
LDO8
F10
LDO9
C7
LDO10
E10
LDO11
D10
LDO12
C10
LDO13
A6
LDO14
A8
LDO15
A10
LDO16
B10
LDO17
B1
LX1
B2
LX1
C1
LX1
F1
LX2
F2
LX2
F3
LX2
J1
LX3
J2
LX3
J3
LX4
K3
LX4
A4
XIN
A3
XOUT
3
4
2
2
1
1
2
1
D
D
D
D
D
D
D
D
N
N
N
N
N
N
N
N
G
G
G
G
G
G
G
G
P
P
P
P
P
P
A
A
1
2
1
5
1
2
5
4
J
D
B
K
D
A
G
G
VALIVE_1.2V_C110
0.8V~1.3V UP TO 10mA
VUSB_1.1V_C110
VADC_3.3V_C110
VTF_2.8V
0.8V~1.3V UP TO 50mA
1.6V~3.6V UP TO 300mA
1.6V~3.6V UP TO 300mA
C524 C535
C522
1.6V~3.6V UP TO 150mA
C525
1.6V~3.6V UP TO 150mA
C526
VLCD_1.8V
3.0V~3.6V UP TO 150mA
VUSB_3.3V_C110
VDAC_3.3V_C110
C527 C528
VCC_2.8V_PDA
VPLL_1.2V_C110
C529
CAM_SENSOR_CORE_1.2V
CAM_AF_2.8V
CAM_ISP_SYS_2.8V
CAM_ISP_RAM_1.8V
C532
C533
CAM_ISP_HOST_2.8V
CAM_SENSOR_IO_1.8V
C534
VCC_3.0V_LCD
C536
L502
L503
L504
C537
VARM_1.2V_C110
VINT_1.1V_C110
C518
VCC_1.8V_PDA
CAM_ISP_CORE_1.2V
C519
C521
C520
CAM_IO_EN
V_BAT
C351
U303
VDD4VOUT
3
CE
5
GND
D
N
G
CAM_SENSOR_A2.8V
1
2
C352
CAM_MCLK_F
CAM_HSYNC_F
CAM_VSYNC_F
CAM_PCLK
F308
OUT1
OUT2
OUT3
OUT4
GND
5
6
7
8
1
IN1
2
IN2
3
IN3
4
IN4
GND
C315
L309
CAM_MCLK
CAM_HSYNC
CAM_VSYNC
CAM_PCLK_F
910
8-28
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Level3Repair
8a-3-13.
GSM
RX
850
NORMAL CONDITION
catch the channel?
NO
Check C115
Check the Voltage at
C186=V_BAT
Check C126, L107,C125
Check component
soldering status OK at
-65
F100
dBm
-65
NO
YES
?
YES
YES
dBm
?
YES
NO
NO
NO
CHECK soldered
RFS100, L103,C115,L118
resolder or change
PAM101, C186
resolder or change
C126, L107,C125
resolder or change
F100
Check F100 PIN
Check the voltage at
R100=V_BAT
{
C110, C264
&{
C111,C112,C233
&{
C109,C263
&{
&{
Check the freq. at C128
GSM850 Receiver is O.K?
C112
-65
=1.8GV?}
MHz
:26
END
dBm
YES
= 2.85V ?}
=1.8
= 2.85V ?}
YES
?
YES
8,9
NO
?}
V?}
YES
NO
NO
NO
resolder or change
F100
resolder or change
UCP200
change or resolder
OSC100
resolder or change
UCP200
8-29
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Level3Repair
8-30
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