8. Level 3 Repair 8-1.Block Diagram
8-1
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Level 3 Repair
8-2. PCB Diagrams 8-2-1. Top
8-2
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8-2-2. Bottom
8-3
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Level 3 Repair
8-3. Flow Chart of Troubleshooting 8-3-1. Power On
Power on No Check the current consumption >= 100 mA?
No
Download the latest binary.
Yes Check the battery voltage VBAT >= 3.45 V?
No
Change the battery
Yes Check CLK in OSC400 PIN =32.768k Hz?
No
Change OSC400 or PBA
Yes END
8-4
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Level 3 Repair
8-3-2. Initial
Power on No Check CLK in OSC400 PIN =32.768kHz?
No
Change OSC400 or PBA
Yes Check UCP300 connection
No
Resolder or replace UCP300
Yes END
8-5
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Level 3 Repair
8-6
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Level 3 Repair
8-7
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Level 3 Repair
8-3-3. Charging Part
Abnormal Charging
No
Check the Battery & TA connection
Insert the battery or TA
Yes
No
Check the voltage VBUS_5.0V_IF>= 5V?
Check C472,C473,ZD405 (short to GND or damage) Change C472,C473,ZD405
Yes
Yes
Check the U403 (SMD or Damage)?
Change the U403
No
END
8-8
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Level 3 Repair
V_BAT
R420 R421 U402 A2
A1 VIN
B2 C2
VIN ON
VOUT VOUT GND
B1 C1
C C N N
V_BAT
2 1
VBUS_5V_IF
C459
VBUS_5V_OVP
VDD1V8
R424
U403 VBUS_5V_IF
BOOT JTAG_JIG_ON_N JIG_ON_N
R432
D2 E3
USB_ID 9 0 4 L
F2
MUS_SDA
F3
MUS_SCL
IFC400
C2
MUIC_INT
TP_MUS_INT
BOOT JIG
B1
VBAT
E2
VDDIO
ID SDA
VBUS_OUT
SCL
VBUS_OUT
B2 INTB
A2 A3
VBUS B3
C463 C464
C461
C462
C460
C480
JTAG_TXD 1 2 3 4 5 6 S1 7 S2 8 NC 9 NC 10 NC 11 NC 12 NC 13 NC 1 2 3 4 5
R434 R435
USB_DM USB_DP
R436
USB_ID
JTAG_RXD
JTAG_ID C466
ZD405
C472
C473
ZD404
2 8 4 C
2 0 4 D Z 0 0 4 D Z
IF_TXD IF_RXD
3 0 4 D Z
TP_IF_TXD
C1 D1
TP_IF_RXD A1 1
U1 U2
COMN1
C3
COMP2 GND
E1 DN1
NC
2 NC
D3
DP2
F1
USB_DM USB_DP AP_DM AP_DP
1 0 4 D Z
R437
MU IC
IF Connector(u-USB)
8-9
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Level 3 Repair
8-3-4. LCD Working
Abnormal LCD Working
No
LCD FPCB connector is correctly connected?
Connect correctly
Yes
Check the voltage LCD_VDD_IO_1.8V(C60 4)=1.8V?
No
Resolder or Change C604
Yes
END
8-10
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Level 3 Repair
8-11
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Level 3 Repair
8-3-5. TSP Working
Abnormal TSP Working
No
TSP FPCB connector is correctly connected?
Connect correctly
Yes
Check the voltage V_TSP _3.0V(C607)=3.0 V?
No
Resolder or Change C607
Yes
END
8-12
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Level 3 Repair
8-13
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Level 3 Repair
8-3-6. Audio Working
Speaker Working
Abnormal Speaker Working
No
Check SPK connector is correctly connected?
Connect correctly
Yes
No
Check Signal in L506,L507?
Resolder or Change L506,L507
Yes
END
8-14
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Level 3 Repair
8-15
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Level 3 Repair
Receiver Working
Abnormal Receiver Working
No
Check the RCV Soldering?
Resolder the RCV
Yes
Yes
Check the RCV break down?
Change the RCV
No
Check Signal in ZD506,ZD507, C507,C509,
Yes
Resolder or Change ZD506,ZD507,C507,C509, C516,C517
Yes
END
8-16
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Level 3 Repair
8-17
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Level 3 Repair
MIC
Working
Abnormal MIC Working
No Pollute a MIC Hole?
Clean up the MIC hole
Yes
No
Check Signal in MIC (L510)=Analog Signal?
Change the MIC
Yes
No
Check the voltage MAINMIC_BIAS_2.8V
Change a main PBA
Yes
Change the MIC
END
8-18
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Level 3 Repair
MIC_BIAS_1.65V
L508
L509
GND GND PWR GND GND
6 5 4 3 2 OUT 1
U504
C519
C520
MAIN_MIC_N
C521
L510
MAIN_MIC_P T R O H S
MIC500
U505 C523 0 1 5 D Z
3 1 5 R
MAIN MIC
8-19
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Level 3 Repair
8-3-7. SIM Card Working
Abnormal SIM Card Working
SIM Connector Breaks down?
Yes
Change the SD700 AND SIM700
No
Resolder or Change C703
No
Check the voltage C703 =3.0V?
Yes END
8-20
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Level 3 Repair
8-21
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Level 3 Repair
8-3-8. CAMERA Working
Abnormal CAMERA Working
No
Camera fits into the socket correctly?
Fit into the socket correctly.
Yes
No
C608=1.2V? C611=2.8V? C610=1.8V?
Check the SLC600 Change the main PBA
Yes
Replace the CAMERA
Yes
END
8-22
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Level 3 Repair
8-23
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Level 3 Repair
8-3-9. GSM850 RX **If you check the tx chain, Check the not only RF Device but also resistor, inductor and capacitor.
Continuous Rx ON RF Input : 62 CH Amplitude : -50dBm Yes
Normal Condition Catch the channel?
No Check Antenna Contact
Yes
No Check C100 >= -55 dBm?
Replace U100
Yes
Resolder or Change F100
The End
8-24
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Level 3 Repair
8-3-10. DCS/PCS RX **If you check the tx chain, Check the not only RF Device but also resistor, inductor and capacitor.
Continous Rx ON RF Input : 698 CH Amplitude : -50dBm Yes
Normal Condition Catch the channel?
No
Check Antenna Contact
Yes
Check C100 >= -55 dBm?
No
Replace U100
Yes
Resolder or Change F101
The End
8-25
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Level 3 Repair
8-3-11. WCDMA Band1 RX **If you check the tx chain, Check the not only RF Device but also resistor, inductor and capacitor.
Continous Rx ON RF Input : 10700CH Amplitude : -50dBm Yes
Normal Condition Catch the channel?
No Check Antenna Contact
Yes No Replace U100
Check C100 = -65 dBm?
Yes
No Check C154 = -65 dBm?
Replace DUF101
Yes
Resolder or Change U102
The End
8-26
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Level 3 Repair
8-3-12. WCDMA Band2 RX **If you check the tx chain, Check the not only RF Device but also resistor, inductor and capacitor.
Continous Rx ON RF Input : 10700CH Amplitude : -50dBm Yes
Normal Condition Catch the channel?
No Check Antenna Contact
Yes No Replace U100
Check C100 = -65 dBm?
Yes
No Check C122 = -65 dBm?
Replace F102
Yes
Resolder or Change U100
The End
8-27
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Level 3 Repair
8-3-13. WCDMA Band8 RX **If you check the tx chain, Check the not only RF Device but also resistor, inductor and capacitor. CONTINUOUS RX ON
Continous Rx ON RF Input : 3013CH Amplitude : -50dBm
RF INPUT : 3013CH AMP : -50dBm
Yes
Normal Condition Catch the channel?
No
Check Antenna Contact
Yes
No Check C100 = -65 dBm?
Replace U100
Yes
No Replace DUF100
Check C127 = -65 dBm?
Yes
Resolder or Change U102
The End
8-28
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Level 3 Repair
8-3-14. GSM850/900 TX **If you check the tx chain, Check the not only RF Device but also resistor, inductor and capacitor.
CONTINOUS TX ON CONDITION TX POWER DAC:14500 CODE APPLIED GSM850 CH : 190 GSM900 CH : 62 RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF LEV. : 10dBm ATT. : 20dB
Tx ON (Level :5) Battery voltage:3.8V
Yes
No Check The U102
Check C109>=3dBm?
Yes
No Replace U100
Check U100 PIN26 OUTPUT(RF CONN.) With HP8960 >= 33dBm?
Yes
The End
8-29
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Level 3 Repair
8-3-15. DCS/PCS TX **If you check the tx chain, Check the not only RF Device but also resistor, inductor and capacitor.
CONTINOUS TX ON CONDITION TX POWER DAC:14500 CODE APPLIED DCS CH : 698 PCS CH : 661 RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF LEV. : 10dBm ATT. : 20dB
Tx ON (Level :5) Battery voltage:3.8V
Yes
Check C108 >= 11dBm?
No Check The U102
Yes
No Replace U100
Check U100 PIN26 OUTPUT(RF CONN.) With HP8960 >= 30dBm?
Yes
The End
8-30
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Level 3 Repair
8-3-16. WCDMA Band1 TX **If you check the tx chain, Check the not only RF Device but also resistor, inductor and capacitor. CONTINOUS TX ON CONDITION TX POWER DAC:120 CODE APPLIED CH : 10700 RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF LEV. : 10dBm ATT. : 20dB
Tx ON Battery Voltage: 3.8V
Yes No Check L122 = 26 dBm?
Replace PAM100
Yes No Check C154 = 24dBm?
Replace DUF101
Yes
No Check U100 PIN26 OUTPUT(RF CONN.) With HP8960 >= 23dBm?
Replace U100
Yes The End
8-31
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Level 3 Repair
8-3-17. WCDMA Band2 TX **If you check the tx chain, Check the not only RF Device but also resistor, inductor and capacitor. CONTINOUS TX ON CONDITION TX POWER DAC:120 CODE APPLIED CH : 10700 RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF LEV. : 10dBm ATT. : 20dB
Tx ON Battery Voltage: 3.8V
Yes Check C133 = -8dBm?
No Check the U102
Yes No Check L112 = 26 dBm?
Replace PAM100
Yes No Check C122 = 24dBm?
Replace F102
Yes
No Check U100 PIN26 OUTPUT(RF CONN.) With HP8960 >= 23dBm?
Replace U100
Yes The End
8-32
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Level 3 Repair
8-3-18. WCDMA Band8 TX **If you check the tx chain, Check the not only RF Device but also resistor, inductor and capacitor. CONTINOUS TX ON CONDITION TX POWER DAC:120 CODE APPLIED CH : 3013 RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF LEV. : 10dBm ATT. : 20dB
Tx ON Battery Voltage: 3.8V
Yes No Replace PAM101
Check L116 = 26 dBm? Yes
Check C127 = 26 dBm?
No Replace DUF100
Yes
Check U100 PIN26 OUTPUT(RF CONN.) With HP8960 >= 23dBm?
No Replace U100
Yes
The End
8-33
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Level 3 Repair
8-34
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Level 3 Repair
8-35
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Level 3 Repair
8-3-19. Bluetooth/WIFI Can't activate or search any Bluetooth devices
No
Check or Replace BT/WIFI ANT
No
Resolder the C243,L215,C244
No
Resolder or Replace U203
BT/WIFI ANT is OK?
Yes
Check the connection C243,L215,C244
Yes
Check the connection U203
Yes
No
BT/WIFI is O.K?
Change a main PBA
Yes
END
8-36
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Level 3 Repair
8-37
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Level 3 Repair
8-38
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Level 3 Repair
8-4. Service Schematics ●
: NC
UME300 (Memory)
●
O
1
2
3
4
5
6
7
8
9
10
A
●
●
O
O
O
O
O
O
●
●
B
●
O
O
O
O
O
O
O
O
●
C
O
●
O
●
O
●
D
●
●
●
●
●
●
E
O
●
●
O
O
O
O
O
●
F
O
O
●
O
O
O
O
O
O
G
O
O
O
O
O
O
O
O
O
H
O
O
O
O
O
O
O
O
O
J
O
O
O
O
O
O
O
O
O
K
O
O
O
O
O
O
O
O
O
L
O
O
O
O
O
M
O
●
O
O
O
O
O
O
N
O
O
●
O
O
P
O
O
●
O
O
O
O
O
O
R
O
O
O
O
O
O
O
O
O
T
O
O
O
O
O
O
O
O
O
U
O
O
O
O
O
O
O
O
O
V
O
O
●
O
O
O
O
O
O
W
●
●
●
O
O
O
O
O
●
Y
●
●
●
●
8-39
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