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8. Level 3 Repair
8-1. Components Layout
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8. Level 3 Repair
8-2. Block Diagram
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8. Level 3 Repair
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TP_TDMB_SPI_MISO
TP_TDMB_SPI_MOSI
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8. Level 3 Repair
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8. Level 3 Repair
8-3. Flow Chart of Troubleshooting
Oscilloscope Digital Multimeter
Power Supply + driver, ESD Safe Tweezer
8960 & Spectrum Analyzer Soldering iron
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8. Level 3 Repair
8-4. Power On
Mobile phone does not power on.
Check the Battery
Voltage.
Is it more than 3.8V?
Yes
Power-on the phone and
check the power-on sound
or motor Vibration.
Sound or Vibration is ok?
No
Check the voltage level at
ANT6002 or R6015 while pressing
power key. Is the voltage high?
Yes
Check the signal of
PMIC_PWR_HOLD =
1.8V
Yes
Check the Clock OSC5000
Is the frequency 24Mhz?
Yes
check the initial operation
Yes
END
No
If its voltage level is extremely low(under 3.0V),
Yes
Abnormal
Check the output voltage of U5004
No
No
(L5002 = 0.8V, L5004 = 0.8V, L5003 = 0.8V, L5005 = 1.35V,
L5006 = 2.0V, C5006 = 1.8V and other LDO Voltage.)
If the output voltage is not normal, Change the U5004.
※ Each voltage level has ±10% margin.
Replace the OSC5000.
Charging the battery by TA.
Change the battery.
Change the FRONT-LCD ASSY
Replace the POWER KEY FPCB.
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8. Level 3 Repair
8-4-2. Initial
Initial Failure.
Yes
Re-download latest
SW on the mobile
phone.
Abnormal
Re Check "8-4-1 Power on"
Trouble shooting process
Normal
Change UCP400
Abnormal
Change PBA
END
Abnormal
Check the OSC5000 (Crack, open etc.)
Check the U5004(Crack etc
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8. Level 3 Repair
8-4-3. No Service
Check menu setting
Settings → Mobile networks → Network mode → Is setting auto connect ?
Home screen → Phone → Keypad
→ *#1234# → check Phone version
→ CP : T285XXXX or unknown
Check the voltage level
C2049 = 1.8V C2050 = 1.2V
C2050 = 1.2V C2052 = 1.2V
C2054 = 1.2V C2057 = 1.2V
C2036 = 1.8V C2059 = 1.8V
Frequency = 26MHz
Replace UCP400
No service
Yes
CP : unknown
Yes
Check TCX2000
Yes
Yes
END
No
CP : J710XXX
Check the connection of RF coaxial cable
No
Replace the TCX2000
Replace the U2002
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8. Level 3 Repair
8-4-4. Sim Part(SIM1)
Insert SIM card
Yes
Change to the new
SIM card. Work
nomal?
No
Is SIM socket ok?
Yes
Check the SIM
Voltage.
C5098 >= 1.8 or
3.0 V
Yes
Check that SIM
RST/IO/CLK.
(ZD5001,ZD5002,
ZD5007)
has signal
Yes
END
Yes
No
Resoldering SIM socket pad
No
Check the U3003 and U5004
No
Check the UCP400 (Crack etc)
END
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8. Level 3 Repair
8-4-4. Sim Part(SIM2)
Insert SIM card
Yes
Change to the new
SIM card. Work
nomal?
No
Is SIM socket ok?
Yes
Check the SIM
Voltage.
C5053 >= 1.8 or
3.0 V
Yes
Check that SIM
RST/IO/CLK.
(C5085, ZD5005,
C5084)
has signal
Yes
END
Yes
No
Resoldering SIM socket pad
No
Check the U5004
No
Check the UCP400 (Crack etc)
END
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8. Level 3 Repair
8-4-5. Charging Part
TA / USB Insert
Charging Sequence Start
VBUS_IF_5P0(C5000) = 5V
Battery is Charging?
END
Yes
Yes
Yes
No
Check the U5000 (Crack etc)
No
Check the U5000 (Crack etc)
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8. Level 3 Repair
8-4-6. OTG
Check VBUS_IF_5P0(C5000) = 5V
Check the LXCHG(L5000) = 5V
END
Yes
Yes
Yes
END
No
No
Check the U5000 (Crack etc)
Check the U5000 (Crack etc)
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8. Level 3 Repair
8-4-7-2. Proxy Sensor
Proxy Sensor does not work.
Yes
Check Short
ZD6001, ZD6002
No
CHECK PROXY_INT
R6022
CHECK PROXY_SCL, SDA
R4050 R4051
END
YES
NO
NO
REPLACE ZD6001, ZD6002
REPLACE U6004
CHANGE PBA
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8. Level 3 Repair
8-4-7-3. Accel Sensor
Accel sensor does not work
Yes
Check voltage 1.8V
C6032 C6060
Yes
Check ACC_INT
TP6000
YES
Check SENSOR_SCL,
SDA
R4048 R4049
END
no
no
REPLACE C6032 C6060
REPLACE U6003
no
CHANGE PBA
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