Introduction to Halley

RF Repair & Troubleshooting

Introduction to Halley

RF Repair & Troubleshooting

Lance
2007/05/20

Lance
2007/05/20

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Outline

¤Test Environments
¤Overview of RF circuits

¤Block Diagram
¤Schematic RF Circuits
¤Component Placement

¤An Example of RF Repair Procedures

¤General GSM Tx debug
¤General GSM Rx debug
¤General WCDMA Tx debug
¤General WCDMA Rx debug

Test Environments

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Operating Frequency

GSM 

Band (Channel) 

Tx Frequency 

Rx Frequency 

EGSM 900 

(975~1023,1~124) 

880.2MHz~889.8MHz 

890.2MHz~914.8MHz 

925.2MHz~934.8MHz 

935.2MHz~959.8MHz 

DCS 1800 (512~885) 

1710.2MHz~1784.8MHz

1805.2MHz~1879.8MHz 

PCS 1900(512~810) 

1850.2MHz~1908.8MHz

1930.2MHz~1989.8MHz 

WCDMA 

Band (Channel) 

Tx Frequency 

Rx Frequency 

WCDMA (9712~9887) 

1920MHz~1980MHz 2110MHz~2170MHz 

 

Tri-band

Band I

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Test Environments Setup -1

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Test Environments Setup -2

Tester

(Agilent 8960)

Fixture

Notebook

Overview of RF Circuits

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GSM Block Diagram

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WCDMA Block Diagram

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Schematic Circuits -1 

¤ GSM schematic circuits

Adobe Acrobat 7.0 

Document

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Schematic Circuits -2

¤ WCDMA schematic circuits

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RF Component Placement- Top

BPF1~3

:GSM

:WCDMA

SAW filters

U18

Receiver

U19

Transceiver

BPF

BPF5

U31

Receiver

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RF Component Placement- Bottom

:GSM

:WCDMA

Duplexer

U28

Isolator

U26

PA

U24

BPF

BPF4

PA

U22

Transmitter

U29

T/R

Switch

U20

PD

U25

WCDMA

Connector

CON7

GSM

Connector

CON6

ANT.

Pad

ANT.

Pad

Antenna Pad

Antenna Pad

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RF Component Placement- Top

BPF1~3

:GSM

:WCDMA

SAW filters

U18

Receiver

U19

Transceiver

BPF

BPF5

U31

Receiver

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RF Component Placement- Bottom

:GSM

:WCDMA

Duplexer

U28

Isolator

U26

PA

U24

BPF

BPF4

PA

U22

Transmitter

U29

T/R

Switch

U20

PD

U25

WCDMA

Connector

CON7

GSM

Connector

CON6

ANT.

Pad

ANT.

Pad

Antenna Pad

Antenna Pad

Repair Procedures

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Procedures of Repair

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Calibration Error Codes -1

¤ GSM

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Calibration Error Codes -2

¤ WCDMA

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GSM Tx/Rx Path-1

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GSM Tx/Rx Path-2

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GSM Test Points -1

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GSM Test Points -2

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General GSM Tx Debug

¤ Find out the defect component on 

GSM Tx path

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How to Do?

¤ Run GSM debug tool to force PA 

to emit RF power

¤ Refer to ATS user guide

¤ Use the high impedance probe to 

sequentially measure RF power 
of test points

¤ Antenna pad, L59, C228, and 

C235

¤ An example – Antenna pad

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General GSM Rx Debug

¤ Find out the defect component on 

GSM Rx path

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How to Do?

¤ Run GSM debug tool to keep Rx 

path receiving CW from the 
generator

¤ Refer to ATS user guide

¤ Use the high impedance probe to 

sequentially measure RF power 
of test points

¤ L59, C653, and C184

¤ An example – C653

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WCDMA Tx/Rx Path-1

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WCDMA Tx/Rx Path-2

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WCDMA Test Points -1

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WCDMA Test Points -2

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General WCDMA Tx Debug -1

¤ Find out the defect component on 

WCDMA Tx path

¤ Include power detector and DC-

DC converter

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General WCDMA Tx Debug -2

Check power detector function

Check DC-DC function

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How to Do?

¤ Run WCDMA debug tool to 

force PA to emit RF power

¤ Refer to ATS user guide

¤ Use the high impedance probe to 

sequentially measure RF power 
of test points

¤ antenna pad, C277, U28 Pin1, 

L42, C260, and L12

¤ DC signal

¤ C268 Pin1 and C262 Pin1

¤ An example – Antenna pad

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General WCDMA Rx Debug

¤ Find out the defect component on 

WCDMA Rx path

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How to Do?

¤ Run WCDMA debug tool to keep 

Rx path receiving CW from the 
generator

¤ Refer to ATS user guide

¤ Use the high impedance probe to 

sequentially measure RF power 
of test points

¤ C277, C293, L27 and L14

¤ An example – C277

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Thanks for Your Listening