9. Flow Chart of Troubleshooting 9-1. Power On ' Power On ' does not work Yes

No

Check the Battery Voltage is more than 3.3V

Change the Battery

Yes No

U400 pin J1(PONKY\) (R713)= 0V? when END KEY is pushed.

Check the U400 related to PONKY\(ON_KEY)

Yes

No

Check the Clock at OSC400(TP402) = 32.768KHz

Resolder OSC400

Yes

No

C423(VCORE_1.2V) = 1.24V? C426(VMEM_1.8V) = 1.8V

Check the U400

Yes

C420(VBB_D_2.9V) = 2.9V? C411(VDD_1.2V) = 1.2V? C403(VCXOPWR_2.8V) = 2.8V? TA400(V_BATT) > 3.3V?

No Check the U400 and BTC400

Yes

No

Check for the clock at TCX200(R209) = 26MHz

Check the TCX200 and U200

Yes

Check the initial operation Yes END

9-1

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Flow Chart of Troubleshooting

9-2

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Flow Chart of Troubleshooting

9-2. Initial

Initial Failure Yes

No U400 pin D2(RESET\,R403) = 0V?

Check the circuit connected to reset

Yes

IS [TP304,TP306,TP307,TP308, TP310,TP311,TP312,TP313, TP314,TP315]

No Check the circuit related to UME300

OK?

Yes

Check the circuit around LCD & HDC600 (Short or not solder) Yes END

9-3

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Flow Chart of Troubleshooting

9-4

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Flow Chart of Troubleshooting

9-3. Charging Part

Abnormal charging part Yes No Resolder IFC400 or L402

C430=5V?

Yes

No C428=5V?

Replace U402

Yes

Check the Battery & TA

Yes END

9-5

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Flow Chart of Troubleshooting

9-6

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Flow Chart of Troubleshooting

9-4. Sim Part

"Insert SIM is displayed on the LCD

Yes

No Check the SIM connector's (SIM400) connection to SIM card

Resolder or change SIM400

Yes

No Check the voltage at pin#1 of SIM400 >= 3.0V ?

Check the U400

Yes

No Is there any signals pin#2,#3,#4 of SIM400 ?

Check the U400

END

9-7

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Flow Chart of Troubleshooting

9-8

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Flow Chart of Troubleshooting

9-5. Microphone Part

Microphone does not work

Yes No Is the SMD status of microphone O.K?

Replace the MIC.

Yes

No Is the voltage of C536 2.1V ?

Check UCP300

Yes

Is the

the path around MIC bias circuit O.K?

No Replace the PBA.

Yes END

9-9

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Flow Chart of Troubleshooting

9-10

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Flow Chart of Troubleshooting

9-6. Speaker Part Speaker does not work

No

Is the terminal of speaker OK?

Check the Speaker contact & change the speaker

Yes No

Is there any signals at L506, L507

Check the circuit around U503

Yes No

Is there any signals at C520, C521

Check the circuit around UCP300

Yes END

9-11

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Flow Chart of Troubleshooting



9-12

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Flow Chart of Troubleshooting

9-7. Receiver Part

Receiver does not work Yes No Check the receiver FPCB soldering & change the receiver.

Is the terminal of receiver OK?

Yes No Is the LCD FPCB is OK? (pin 1,2)

Change the LCD FPCB

Yes

Is there any signals at R310, R311?

No

Change the UCP300

Yes end

9-13

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Flow Chart of Troubleshooting

9-14

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Flow Chart of Troubleshooting

9-7. Motor Part

Motor does not work Yes No Is the terminal of Motor OK?

Check the wire soldering & change the motor

Yes No Check the UCP300

Is the signal high at R605?

Yes

Is the signal is 176 Hz wave between Motor_P and Motor_N?

No

Change the U602

Yes

No

Is there any signals at U602 #7, #8, #10 pin ?

Check the UCP300

Yes END

9-15

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Flow Chart of Troubleshooting

9-16

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Flow Chart of Troubleshooting

9-8. LCD part LCD does not work Yes

Is the LCD Slide FPCB connected in HDC600?

No Put the LCD Slide FPCB on HDC600

Yes

C602=VBAT(3.8V)?

No

check Battery connection

Yes

Is Slide FPCB OK ?

No

Replace the Slide FPCB

Yes

Replace the LCD Module Not OK

Check the U400

END

9-17

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Flow Chart of Troubleshooting

9-18

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Flow Chart of Troubleshooting

9-9. FM RADIO Part FM Radio does not work Yes

No

check the Voltage at C132 (3.8V,VBAT), C133 (2.9V)?

Check U400

Yes

No

check the Voltage at C136 (1.8V)?

Resolder or Replace the U101

Yes

No

Is there any signal at L116 ?

Check the Earphone and U101 or Resolder L116

Yes

No

Is there any signal at C155 and C156?

Resolder or Replace the U101 or Resolder C155,C156

Yes

No

Is there any signal at L503 and L504?

Resolder or Replace the U503 or Resolder L503, L504

Yes

Check UCP300

No

Replace the UCP300

Yes

Check the EAR/SPEAKER Path.

9-19

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Flow Chart of Troubleshooting

9-20

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Flow Chart of Troubleshooting

9-21

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Flow Chart of Troubleshooting

9-10. Bluetooth Part BT Connection disable

No

check the Voltage at C132 (3.8V,VBAT), C133 (2.9V)?

Check U400

Yes

No

Check BT function ON

Resolder or Replace the U101

Yes

No

check the Voltage at C136 (1.8V)?

Resolder or Replace the U101

Yes

No

C171 = 26MHz and TP402 =32.768KHz ?

Resolder or Replace the U101 or Resolder or Replace the U104

Yes

No

Check the assembled staus of ANT102

Resolder ANT102 or change SPK MODULE

Yes Resolder or Replace the U101 or UCP300

END

9-22

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Flow Chart of Troubleshooting

9-23

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Flow Chart of Troubleshooting

9-24

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Flow Chart of Troubleshooting

9-11. GPS Part GPS ENABLE

No

check the Voltage at C132 (3.8V,VBAT), C133 (2.9V)?

Check U400

Yes

No

check the Voltage at C136 (1.8V)?

Resolder or Replace the U101

Yes

No

C171 = 26MHz

Resolder or Replace the U101 or Resolder or Replace the U104

Yes

Check the assembled staus of ANT103

No

Resolder ANT103 or change REAR COVER

Yes Resolder or Replace the U101 or UCP300

END

9-25

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Flow Chart of Troubleshooting

9-26

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Flow Chart of Troubleshooting

9-27

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Flow Chart of Troubleshooting

9-12. WLAN Part WLAN Connection disable

No

check the Voltage at C131 (3.8V,VBAT), C128 (2.9V)?

Check U400

Yes

No

Check WLAN function ON

Resolder or Replace the U102

Yes No

C171 = 26MHz and TP402 =32.768KHz ?

Resolder or Replace the U102 or Resolder or Replace the U104

Yes

No

Check the assembled staus of ANT102

Resolder ANT102 or change SPK MODULE

Yes Resolder or Replace the U102 or UCP300

END

9-28

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Flow Chart of Troubleshooting

9-29

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Flow Chart of Troubleshooting

9-30

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Flow Chart of Troubleshooting

9-13. GSM/DPCS Receiver CONTINUOUS RX on RF input : EACH BAND CENTER

RX ON Cell Power : -50 dBm

CH Cell power : -50dBm

Yes

C104 ≥ -65dBm

No

Resolder RFS100

Yes

C101 = 2.8V

No

Check FEM100 POWER (C416,C101.C107)

Yes

Check R102,3,4,5 Well?

No

ResolderR102,3,4,5 or Change R102,3,4,5

Yes No

Change FEM100

Check FEM100 ok?

Yes

Check U200

END

9-31

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Flow Chart of Troubleshooting

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Flow Chart of Troubleshooting

9-14 GSM/DPCS Transmitter TX ON (5 LEVEL:GSM 0 LEVEL: DPCS)

No

C105≥ 0dBm(DPCS) C108≥ 0dBm(GSM)

Check U200

Yes

C114 = Vbat

No

Check Battery & C114,119

No

Check PAM100 & R101

No

Check PAM100

Yes

R101 ≥ 1.5

Yes

L191 ≥ 28dBm(DPCS) L192≥ 30dBm(GSM)

Yes

C101 = 2.8V

No

Check FEM100 POWER (C416,C101.C107)

Yes

C104 ≥ 30dBm

No

Resolder RFS100

Yes

END

9-33

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Flow Chart of Troubleshooting

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Flow Chart of Troubleshooting

9-15. WCDMA Receiver CONTINUOUS RX on RF input : 10700CH(B1) 3012CH(B8) Cell power : -50dBm

RX ON Yes No

C104 ≥ -65dBm

Resolder RFS100

Yes

C101 = 2.8V

No

Check FEM100 POWER (C416,C101.C107)

Yes

L292 ≥ -68dBM(B8) L295 ≥ -68dBM(B1)

No

Check FEM100

Yes No

Resolder or Change DUF200(B8) DUF201(B1)

C209 ≥ -74dBM(B8) C217 ≥ -74dBM(B1) Yes

Check U200

END

9-35

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Flow Chart of Troubleshooting

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Flow Chart of Troubleshooting

9-16. WCDMA Transmitter

C260(B1) C248(B8) ≥ 0dBm

No

Check around U200 (each TX path)

Yes No

Check around U201

R211 = 1.5V

Yes No

L205(B1) L219(B8) ≥ 15dBm

Check around PAM200

Yes No

L295(B1) L292(B8) ≥ 17dBm

Resolder or Change DUF200(B8) DUF201(B1)

Yes No

C101 = 2.8V

Check FEM100 POWER (C416,C101.C107)

Yes

C104 ≥ 20dBm

No

Resolder RFS100

Yes

END

9-37

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Flow Chart of Troubleshooting

9-38

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Flow Chart of Troubleshooting

9-39

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Flow Chart of Troubleshooting

9-17. CAMERA CAM is not working

No

CAM KEY OK?

Check TACT703

Yes No

CAM FPCB Connect ok?

Connect FPCB to SLC600

Yes

C606 = 1.8V C608 = 2.8V C610 = 2.8V

No

Check around U601,U603

Yes No

Check SLC600 & ZD603 ?

Change SLC600, etc.

Yes

Change CAM MODULE

END

9-40

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Flow Chart of Troubleshooting

9-41

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7. Block Diagrams Main RF Block

7-1

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Block Diagrams

Bluetooth, FM RADIO, GPS, WLAN Block

7-2

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Block Diagrams

Audio Block

7-3

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Block Diagrams

Camera Block

7-4

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8. PCB Diagrams

8-1

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PCB Diagrams

8-2

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