motorola V3x Debug Guide

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Doc. No: tsg_3g_v3x_level3 Version: 1.1 Date: 29.06.2007

Troubleshooting Guide V3x – Level 3

This document was created to assist analyzers troubleshooting Motorola 3G Phones. All information was collected during the repair in the Repair Entitlement Group Flensburg.

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Doc. No: tsg_3g_v3x_level3 Version: 1.1

Motorola GmbH, CSS Center, Mobile Devices

Date: 29.06.2007

Title: Troubleshooting-Guide V3x Level 3 Page: 2 / 26

Contents

Requirements

- System Requirements

- Basic information on troubleshooting Motorola 3G Phones

- Advice on working with lead free soldering/ underfill

Top Ten defect parts Troubleshooting Guide

- ALTxx

- AUDxx

- BATxx

- CHGxx

- CPRxx

- DAPxx

- DIMxx

- DISxx

- FTRxx

- MKPxx

- OPRxx

- SIKxx

- SIMxx

- TONxx

Follow up faults caused by failed repair actions Flash procedures

- Software Update

- Recovering Flash memory in Forced Flash Mode

Document Revision History: Date Version Comment

01.06.2007 1,00 Initial release of document

29.06.2007 1,10 (1) replaced figure in BAT02 section with correct

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description of VRF_TX_2.775V

Doc. No: tsg_3g_v3x_level3 Version: 1.1

Motorola GmbH, CSS Center, Mobile Devices

Date: 29.06.2007

Title: Troubleshooting-Guide V3x Level 3 Page: 3 / 26

Requirements

- System Requirements

- Power supplies, Oscilloscope, Spectrum Analyzer, Test Set

- preheater for lead free soldering/ soldering machine for BGA´s

- Microscope

- RepairStudio/Radiocomm,

- Field Service Bulletins

- Block diagrams/Schematics

- PinNetFinder FLVIEW

- Basic information on troubleshooting Motorola 3G Phones

- Make sure all contacts are clean, especially the EMU-Connector

- Use newest approved Software

- RESET/MASTERCLEAR can fix some issues

- Do a visual inspection on customer abuse/liquid contamination

- Advice on working with lead free soldering/ underfill

- Remove heat sensitive parts before soldering

- Work very carefully because of underfilled CPU(U1000) and Harmony (U100)

- Use protection shields / air-cooling equipment

- Useflux for lead free soldering

- Use preheater (HAKKO 853)

use of preheater, protection blocks and air-cooling equipment

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Top Ten defect parts

The following is an analysis summary of the V3x repaired during NPI process by the Repair Entitlement Group CSS Flensburg

Doc. No: tsg_3g_v3x_level3 Version: 1.1 Date: 29.06.2007

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Doc. No: tsg_3g_v3x_level3 Version: 1.1

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Troubleshooting Guide

First Step

Please make sure beforehand, that the problem at hand is not a SW related issue that can be solved with a 1FF update and a Master Reset/ Clear. In many cases a simple Master Reset can already fix the problem. The following section is meant to be a help in troubleshooting problems which are already identified as PCB related.

ALT01 Alert – Ring tone, no ALT02 Alert – Ring tone, low ALT03 Alert – Ring tone, noise/distortion

Check LOUD_SPK- (P1) and LOUD_SPK + (P2) – both should have around 2.5Vdc

-

if not check L6009/L6010 for broken connection, VS4200/VS4201/C4203/C4204/

C4212/C4213/C6026/C6027/C6028/C6031 for low resistance

- check ALRT_REF 2.5Vdc at C4210

- check PCB for open tracks from P1 to U3000-F1 / P2 to U3000-H1

- you can either use “Repair-Studio” to switch on 1kHz tone to the alert-speaker to check

for open tracks, but be careful: You can have 1kHz and audio in call at P1/P2, but no alert-tone, because the PCAP is defect!

- if 1kHz is ok, replace PCAP2 (U3000)

The alert signal is converted to analog and amplified by the PCAP2, but generated by the POG, so if the PCAP2 alert audio path is ok there could be a problem with the POG not generating the alert signals.

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ALT11 Alert – Vibrator, no ALT12 Alert – Vibrator, weak

Turn on vibrator using Repair Studio/Radiocomm. Measure V_VIB – should be about 1.3 Vdc. V_VIB is provided directly by the PCAP (U3000). To verify if the vibrator is defective a simple method is to provide a supply voltage (1Vdc should be enough) via test probes directly on the vibrator M3000 (radio in off state!). It should be rotating, if not replace the vibrator M3000. Otherwise replace PCAP (U3000).

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AUDxx Audio problems

First step on every audio related problem is to identify which audio paths are affected. If the audio signals in a loop are ok, there could be an audio problem in a network call. This could be due to a POG related defect.

AUDxx Audio – Headset Detection problem

If the headset detection is not working correctly, there is most likely a problem with the detection of any accessory connected to the EMU connector (J5501). With an open J5501 the voltage at pin 4 of J5501 (USB_ID) should be 2,775V when phone is powered on with battery. For headset detection USB_ID line is used. With headset connected voltage on that line should be 1,7V.

AUD01 Audio – Earpiece, No AUD02 Audio – Earpiece, Low

Check EAR_SPKR- at C5207 and EAR_SPKR+ at C5208. Both should have around 1.4Vdc offset voltage, if audio-loop is switched on and additional up to 3Vpp at 1kHz, if test-tone is switched on.

- if not check J5212 for solder shorts, C5207/5208 for low resistance

- (eventually) check PCB on open tracks from C5207 to C4001/U3000-J4 and C5208 to

C4000/U3000-K2

- if ok, replace PCAP2 (U3000)

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AUD05 Audio – Earpiece, Headset

First check the headset-detection. If ok set radio in headset audio loop (stereo) using Repair Studio/Radiocomm and generate tone (1kHz).

- check HS_SPKR_R at L6011 / HS_SPKR_L at L6012

if ok replace EMU-IC (U6003)

-

if not replace PCAP (U3000)

You cannot check audio signal directly at J5501, because in this case it is used for USBconnection!

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