Table of Contents

Baseband main troubleshooting 3-5

General power checking 3-7

Backup battery troubleshooting 3-8

Dead or jammed device troubleshooting 3-10

Keyboard troubleshooting 3-11

Hall sensor troubleshooting 3-13

TV- out troubleshooting 3-14

General power checking troubleshooting 3-15

USB troubleshooting 3-16

SIM card troubleshooting 3-17

MicroSD card troubleshooting 3-18

Combo memory troubleshooting 3-20

Flash programming troubleshooting 3-21

USB charging troubleshooting 3-24

Clocking troubleshooting 3-25

Power key troubleshooting 3-26

Naviscroll troubleshooting 3-27

User interface troubleshooting 3-28

Display Troubleshooting 3-29

Display Troubleshooting 3-29

Illumination troubleshooting 3-30

LED driver troubleshooting 3-33

I/O expander troubleshooting 3-35

Audio Troubleshooting 3-35

Audio troubleshooting test instructions 3-35

External earpiece troubleshooting 3-39

DAC33 troubleshooting 3-40

External microphone troubleshooting 3-41

Internal earpiece troubleshooting 3-42

Internal handsfree speaker troubleshooting 3-43

Internal microphone troubleshooting 3-44

Vibra troubleshooting 3-45

ALS Technical Description and Troubleshooting 3-46

Ambient Light Sensor 3-46

ALS troubleshooting 3-46

Re-tuning ALS 3-47

Bluetooth and FM Radio Troubleshooting 3-48

Introduction to Bluetooth/FM radio troubleshooting 3-48

Bluetooth BER test 3-51

Bluetooth and FM radio self tests in Phoenix 3-52

Bluetooth troubleshooting 3-53

FM radio troubleshooting 3-54

FM radio testing 3-55

GPS Troubleshooting 3-55

GPS layout and basic test points 3-55

GPS Settings for Phoenix 3-56

GPS control 3-56

Quick Test window 3-57

GPS failure troubleshooting 3-59

WLAN Troubleshooting 3-59

WLAN functional description 3-59

WLAN settings for Phoenix 3-60

WLAN functional tests 3-62

WLAN auto tuning 3-64

List of Figures

Figure 14 Single-ended output waveform of the Ext_in_HP_out measurement when earpiece is connected 3-37

Figure 15 Single-ended output waveform of the Ext_in_IHF_out out loop measurement when speaker is connected (measured at speaker pads), no filter is used 3-37

Figure 16 Single-ended output waveform of the Ext_in_Ext_out loop 3-38

Figure 17 Single-ended output waveform of the Digital_stereo_microphone_in_Ext_out loop 3-38

Figure 18 Ambient Light Sensor 3-46

Figure 19 Bluetooth/WLAN antenna 3-49

Figure 20 BT/FM component layout 3-51

Figure 21 Bluetooth and FM radio self tests in Phoenix 3-52

Figure 22 GPS layout and basic test points 3-56

Figure 23 GPS Control dialogue box 3-57

Figure 24 GPS Quick Test window 3-58

Figure 25 WLAN circuitry 3-60

Figure 26 WLAN auto tune settings 3-65

Figure 27 WLAN auto tune results 3-66

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