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Checking Flow PowerPoint PPT Presentation


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4.2 TX Part Trouble. 4.2.1 DCN Tx Trouble. Checking Flow. START. √ Press “OK ” + “0” + “000000” in Phone idle state √ Press “7” FCC Test √ Press “2” CDMA FCC -Set CH384 & AGC 360 √ Spectrum analyzer setting √ Oscilloscope setting. 1. Check Power Circuit. 6. Check HDET Circuit.

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Checking Flow

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Checking flow

4.2 TX Part Trouble

4.2.1 DCN Tx Trouble

Checking Flow

START

√ Press “OK” + “0” + “000000” in Phone idle state

√ Press “7” FCC Test

√ Press “2” CDMA FCC

-Set CH384 & AGC 360

√ Spectrum analyzer setting

√ Oscilloscope setting

1. Check

Power Circuit

6. Check

HDET Circuit

2. Check

VCTCXO Circuit

7. Check

Duplexer

3. Check

RFT6150 Circuit

8. Check

Diplexer

4. Check

RF SAW

9. Check

Mobile Switch

5. Check

PAM Circuit

√ Re-download SW, CAL


Checking flow

4.2.1.1. Check Power Circuit

TEST POINT

Checking Flow

Start

U400,73

Check U400, Pin73

+3.0V ?

NO

Replace U400

YES

Regulator Circuit is OK

See Next Page

Circuit Diagram


Checking flow

4.2.1.2. Check VCTCXO Circuit

Checking Flow

Test Point

Start

X100, 4

Check X100, Pin3

Refer to Graph4.2.1.2

VCTCXO Circuit is OK

See next page

X100, 3

Similar?

YES

NO

Check X100, Pin4

+2.8V?

NO

Check U400

YES

Replace X100

Circuit Diagram

Waveform

Graph.4.2.1.2


Checking flow

4.2.1.3. Check RFT Circuit

Test Point

CELL_OUT

TX_AGC_ADJ

+3.0V_TX

TCXO

TX_Q_P/M

TX_I_P/M

+2.6V_MSMP2

TX_ON

SBCK

SBDT

SBST

Circuit Diagram


Checking flow

Checking Flow

Start

Check U111, Pin23

CELL_OUT

Refer to Graph4.2.1.3(A)

Similar?

YES

RFT Circuit is OK

See next page

NO

Check U111 I/Q Data

Pin27. 28, 29, 30

Refer to Graph4.2.1.3(B)

Check U111, Pin15

TCXO

Refer to Graph4.2.1.3(C)

Similar?

NO

Check U201 MSM

Similar?

NO

Check TCXO Circuit

YES

Check U111, Pin32,6

+2.6V_MSMP2

+3.0V_TX

YES

Check U115, Pin 2,3,4

SBCK

SBDT

SBST

Refer to Graph4.2.1.3(D)

OK?

NO

Check Regulator Circuit

Similar?

NO

YES

Check SBI Signal

Line & MSM

Check U111, Pin1

(TX_ON Signal)

YES

Replace U111

≥2.5V

NO

Check TX_ON

Signal Line & MSM

YES


Checking flow

Waveform

Graph 4.2.1.3(A)

Graph 4.2.1.3(C)

TX_I_P

TX_Q_P

TX_Q_N

TX_I_N

Graph 4.2.1.3(B)

SBDT

SBST

SBCK

SBCK

Graph 4.2.1.3(D)


Checking flow

4.2.1.4. Check DCN RF Tx SAW

Test Point

Checking Flow

RF_OUT

Start

Check F105 Pin1,3

RF_IN, RF_OUT

Refer to Graph4.2.1.4

Similar?

YES

RF TX SAW is OK

See next page

NO

Replace F105

RF_IN

Circuit Diagram

Waveform

RF_IN

RF_OUT

Graph 4.2.1.4


Checking flow

4.2.1.5. Check DCN PAM Circuit

Test Point

Checking Flow

VCC

RF_OUT

Start

Check U106 Pin2,11

RF_IN / RF_OUT

Refer to Graph4.2.1.5

Similar?

YES

PAM Circuit is OK

See next page

NO

Check U106 Pin4,9,10

≥3.4V

NO

RF_IN

VCC

Check VCC Line

PA_ON

PA_R1

YES

Check U106 Pin1

≥2.5V

NO

Check +3.0V_TX Line

And PA_ON

YES

Replace U106


Checking flow

Circuit Diagram

Waveform

RF_IN

RF_OUT

Graph 4.2.1.5


Checking flow

4.2.1.6. Check RF Coupler & HDET Circuit

Test Point

Checking Flow

Start

U141

Check U104 Pin B2

Refer to Graph4.2.1.6

Similar?

YES

HDET Circuit is OK

See next page

NO

HDET_OUT

Check U104 Pin A1

+3.0V?

NO

Check U141

RF_IN

+3.0V_TX

YES

Check U104 Pin A2

Circuit Diagram

+3.0V?

NO

Check U400

YES

Replace U104

Waveform

Graph 4.2.1.6


Checking flow

4.2.1.7. Check DCN Duplexer

Test Point

Checking Flow

Start

ANT_PORT

Check DP100 Pin1,6

TX_PORT, ANT_PORT

Refer to Graph4.2.1.7

Similar?

YES

Duplexer is OK

See next page

NO

Replace DP100

TX_PORT

Circuit Diagram

Waveform

TX_PORT

ANT_PORT

Graph 4.2.1.7


Checking flow

4.2.1.8. Check Triplexer Circuit

Test Point

Checking Flow

START

ANT_PORT

Check U101 Pin5,2

CELL_PORT

ANT_PORT

Refer to Graph 4.2.1.8

YES

Triplexer Circuit is Ok

See next page

Similar?

Triplexer Circuit is

NO

Check U101 Pin 5

CELL_PORT

NO

Check CDMA_MODE

>=2.5

Signal Line & MSM

YES

Replace U101

Waveform

Circuit Diagram

CELL_PORT

ANT_PORT

Graph 4.2.1.8


Checking flow

4.2.1.9. Check Mobile Switch

Test Point

Checking Flow

Start

Check U115, Pin2

RF_IN

Refer to Graph4.2.1.9

Similar?

YES

Mobile Switch is OK

NO

Check C102, L104

RF_IN

Circuit Diagram

Waveform

RF_IN

Graph 4.2.1.9


Checking flow

4.2.2 PCS Tx Trouble

Checking Flow

START

√ Press “OK” + “0” + “000000”in Phone idle state

√ Press “7” FCC Test

√ Press “1” PCS FCC

-Set CH600 & AGC 320

√ Spectrum analyzer setting

√ Oscilloscope setting

1. Check

Power Circuit

6. Check

HDET Circuit

2. Check

VCTCXO Circuit

7. Check

Duplexer

3. Check

RFT6150 Circuit

8. Check

Diplexer

4. Check

RF SAW

9. Check

Mobile Switch

5. Check

PAM Circuit

√ Re-download SW, CAL


Checking flow

4.2.2.1. Check Power Circuit

TEST POINT

Checking Flow

Start

U400,73

Check U400, Pin73

+3.0V ?

NO

Replace U400

YES

Regulator Circuit is OK

See Next Page

Circuit Diagram


Checking flow

4.2.2.2. Check VCTCXO Circuit

Checking Flow

Test Point

Start

X100, 4

Check X100, Pin3

Refer to Graph4.2.2.2

VCTCXO Circuit is OK

See next page

X100, 3

Similar?

YES

NO

Check X100, Pin4

+2.8V?

NO

Check U400

YES

Replace X100

Circuit Diagram

Waveform

Graph.4.2.2.2


Checking flow

4.2.2.3. Check RFT Circuit

Test Point

PCS_OUT

TX_AGC_ADJ

+3.0V_TX

TCXO

TX_Q_P/M

TX_I_P/M

+2.6V_MSMP2

TX_ON

SBCK

SBDT

SBST

Circuit Diagram


Checking flow

Checking Flow

Start

Check U111, Pin21

PCS_OUT

Refer to Graph4.2.2.3(A)

Similar?

YES

RFT Circuit is OK

See next page

NO

Check U111 I/Q Data

Pin27. 28, 29, 30

Refer to Graph4.2.2.3(B)

Check U111, Pin15

TCXO

Refer to Graph4.2.2.3(C)

Similar?

NO

Check U201 MSM

Similar?

NO

Check TCXO Circuit

YES

Check U111 Pin32,6

+2.6V_MSMP2

+3.0V_TX

YES

Check U111 Pin 2,3,4

SBCK

SBDT

SBST

Refer to Graph4.2.2.3(D)

OK?

NO

Check Regulator Circuit

Similar?

NO

YES

Check SBI Signal

Line & MSM

Check U111, Pin1

(TX_ON Signal)

YES

Replace U111

≥2.5V

NO

Check TX_ON

Signal Line & MSM

YES


Checking flow

Waveform

Graph 4.2.2.3(A)

Graph 4.2.2.3(C)

TX_I_P

TX_Q_P

TX_Q_N

TX_I_N

Graph 4.2.2.3(B)

SBDT

SBST

SBCK

SBCK

Graph 4.2.2.3(D)


Checking flow

4.2.2.4. Check PCS RF Tx SAW

Test Point

Checking Flow

RF_OUT

Start

Check F104 Pin1,3

RF_IN, RF_OUT

Refer to Graph4.2.2.4

Similar?

YES

RF TX SAW is OK

See next page

NO

Replace F104

RF_IN

Circuit Diagram

Waveform

RF_IN

RF_OUT

Graph 4.2.2.4


Checking flow

4.2.2.5. Check PCS PAM Circuit

Test Point

Checking Flow

VCC

RF_OUT

Start

Check U106 Pin5,7

RF_IN / RF_OUT

Refer to Graph4.2.2.5

Similar?

YES

PAM Circuit is OK

See next page

NO

Check U106 Pin4,9,10

≥3.4V

NO

RF_IN

VCC

Check VCC Line

PA_R1

PA_ON

YES

Check U106 Pin6

≥2.5V

NO

Check +3.0V_TX Line

And PA_ON

YES

Replace U106


Checking flow

Circuit Diagram

Waveform

RF_IN

RF_OUT

Graph 4.2.2.5


Checking flow

4.2.2.6. Check RF Coupler & HDET Circuit

Test Point

Checking Flow

Start

Check U104 Pin B2

Refer to Graph4.2.2.6

Similar?

YES

HDET Circuit is OK

See next page

U142

NO

HDET_OUT

Check U104 Pin A1

+3.0V?

NO

Check U142

RF_IN

+3.0V_TX

YES

Check U104 Pin A2

+3.0V?

NO

Check U400

Circuit Diagram

YES

Replace U104

Waveform

Graph 4.2.2.6


Checking flow

4.2.2.7. Check PCS Duplexer

Test Point

Checking Flow

Start

ANT_PORT

Check DP101 Pin2,3

TX_PORT, ANT_PORT

Refer to Graph4.2.2.7

Similar?

YES

Duplexer is OK

See next page

NO

Replace DP101

TX_PORT

Circuit Diagram

Waveform

TX_PORT

ANT_PORT

Graph 4.2.2.7


Checking flow

4.2.2.8. Check Triplexer Circuit

Test Point

Checking Flow

START

ANT_PORT

Check U101 Pin7,2

PCS_PORT

ANT_PORT

Refer to Graph 4.2.1.8

YES

Triplexer Circuit is Ok

See next page

Similar?

NO

Check U101 Pin 7

PCS_PORT

NO

Check PCS MODE

>=2.5

Signal Line & MSM

YES

Replace U101

Waveform

Circuit Diagram

PCS_PORT

ANT_PORT

Graph 4.2.1.8


Checking flow

4.2.2.9. Check Mobile Switch

Test Point

Checking Flow

Start

Check U101 Pin2

RF_IN

Refer to Graph4.2.2.9

Similar?

YES

Mobile Switch is OK

NO

RF_IN

Check C101, L103,VR100

Circuit Diagram

Waveform

RF_IN

Graph 4.2.2.9


Checking flow

4.2.2.9. Check Mobile Switch

Test Point

Checking Flow

Start

Check U115, Pin2

RF_IN

Refer to Graph4.2.2.9

Similar?

YES

Mobile Switch is OK

NO

Check C102, L104

RF_IN

Circuit Diagram

Waveform

RF_IN

Graph 4.2.2.9


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