Motorola E398 series Guide

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Doc. No: TSG_E398
Version: 0.9c
Date: 17.06.2005
Title: Troubleshooting-Guide E398 Page: 1 / 12
Repair Support Information © Copyright 2003-2005 Motorola Inc. All Rights reserved.
Motorola internal use
E398 DebugGuide

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Doc. No: TSG_E398
Version: 0.9c
Date: 17.06.2005
Title: Troubleshooting-Guide E398 Page: 2 / 12
Repair Support Information © Copyright 2003-2005 Motorola Inc. All Rights reserved.
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Table of Contents
1.0 - Preamble
2.0 - Some Basic Tips
2.1 - Software Upgrade
2.2 - Visual Inspection
2.3 - Cross Check
2.4 - Solder Process
3.0 - Top 10 Defective Parts
4.0 - Most frequently Failure Codes and Root Causes
5.0 - Troubleshooting
5.1 - Alert
5.2 - Audio
5.3 - Battery
5.4 - Charging
5.5 - Display Backlight
5.6 - Main Keypad
5.7 - Power Up (TON01)
5.8 - Power Up (TON03)
5.9 - TX
Modified Date By

Motorola GmbH, CSS Center Flensburg, Mobile Devices
Doc. No: TSG_E398
Version: 0.9c
Date: 17.06.2005
Title: Troubleshooting-Guide E398 Page: 3 / 12
Repair Support Information © Copyright 2003-2005 Motorola Inc. All Rights reserved.
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1.0 - Preamble
This Document was created to assist Analyzers, when fixing Problems on Motorola
GSM Phones. All Information was collected during the Repair in the Repair
Entitlement Group Flensburg.

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Doc. No: TSG_E398
Version: 0.9c
Date: 17.06.2005
Title: Troubleshooting-Guide E398 Page: 4 / 12
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2.0 - Some Basic Tips
2.1 Software upgrade
- always use the latest Software available for the phone (Software-
bugs are excluded)
2.2 Visual inspection
- check for liquid damage (water indicator)
- check for missing, broken or unsoldered parts
- check for mechanical damage (board twisted, tracks defect etc.)
2.3 Cross check
- before beginning to replace/change parts or soldering anything
try to consider the failure from all sides.
2.4 Solder process
- the soldering process of lead-free products always must be done
with the aid of a bottom-heater and flux for lead-free soldering
- always cover sensitive parts with shields

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Doc. No: TSG_E398
Version: 0.9c
Date: 17.06.2005
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3.0 - Top 10 Defective Parts
This is the Analysis of the repaired Phones in NPI-Process, related to the first repair
works at all.

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Doc. No: TSG_E398
Version: 0.9c
Date: 17.06.2005
Title: Troubleshooting-Guide E398 Page: 6 / 12
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4.0 - Most frequently Failure Codes and Root Causes
ALTxx - U900
AUDxx - Microphone, J2000, U900, U800
BATxx - U50
CHGxx - J1400, Fl1400, U900, J950, CR900, U900
DIMxx - J1301, L960, D960
MKPxx - Keyboard, J1401, J1301, U1400, U1401, S1460, SW100, SW1402,
U800
TON01 - Y900, U900, Y805, U800, U700
TON03 - Y900, U900
CPRxx - U50, U150, J40

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Date: 17.06.2005
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5.0 - Troubleshooting
5.1 - Alert - Customer Complaint: ALTxx
1.) If the Alert is not working
check:- Chassis Speaker Assy
- J1261
- the Components around D961
- the Components around D962
- for Dry Joints, Solder Shorts, damaged and skewed Parts
- replace missing or damaged Components
2.) If the Alert is still not working
replace: - U900
Components around D961/
D962

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Doc. No: TSG_E398
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Date: 17.06.2005
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5.2 - Audio - Customer Complaint: AUDxx
1.) If Audio is not working
check:- the Microphone
- J2000
- the Components around the Microphone
- the Components around TP1200
- the Components around TP1201
- the Components around U900
2.) If Audio is still not working
check at TP1200 and TP1201 ≈1,4V DC
replace: - U900 (if not effective)
- U800
TP1200
TP1201
5.3 - Battery - Customer Complaint: BATxx
1.) If the Battery and/or the PA-Area is getting hot
replace: - U50

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Date: 17.06.2005
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5.4 - Charging - Customer Complaint:CHGxx
1.) If charging is not possible
check:- J1400
- FL1400
- U900
- J950
- CR900
- for Dry Joints, Solder Shorts, damaged and skewed Parts
- replace missing or damaged Components
2.) If charging is still not possible
check “BATT FDBK” at CR900 (if not effective)
replace: - U900
BATT FDBK

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Date: 17.06.2005
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5.5 Display Backlight - Customer Complaint: DIMxx
1.) If the Display Backlight is not working
check:- J1301
- for Dry Joints, Solder Shorts, damaged and skewed Parts
- replace missing or damaged Components
2.) If the Display Backlight is still not working
check the “BACKLIGHT 5V” at C1454
replace: - L960 (if not effective)
- D960
BACKLIGHT 5V

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Doc. No: TSG_E398
Version: 0.9c
Date: 17.06.2005
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5.6 - Main Keypad - Customer Complaint: MKPxx
1.) If the Main Keypad is not working
check:- the Keyboard
- J1401
- J1301
- U1400
- U1401
- S1460
- SW1400
- SW1402
- for Dry Joints, Solder Shorts, damaged and skewed Parts
- replace missing or damaged Components
2.) If the Main Keypad is still not working
replace: - U1400 (if not effective)
- U1401 (if not effective)
- U800
5.7 - Power Up - Customer Complaint: TON01
1.) If the PCB doesn’t start up
check the 32kHz at Y900
replace: - Y900 (if not effective)
- U900
check the 26MHz at Y805
replace: - Y805 (if not effective)
- U800
2.) If the PCB starts Up in Flashmode
replace: - U700 (current drain ~ 1,5mA)
3.) If the PCB doesn’t start up
check VBOOST (5,6V) at L922, L921, CR921 and U900
replace if suspect
check VBUCK (1,9V) at L920, CR920, R920, C927 and U900
replace if suspect

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Doc. No: TSG_E398
Version: 0.9c
Date: 17.06.2005
Title: Troubleshooting-Guide E398 Page: 12 / 12
Repair Support Information © Copyright 2003-2005 Motorola Inc. All Rights reserved.
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5.8 - Power Up - Customer Complaint: TON03
1.) If the PCB switches itself off in Standby
check 32kHz at Y900
replace: - Y900 (if not effective)
- U900
5.9 - TX - Customer Complaint: CPRxx
1.) If TX is not working
check:- U50
- U150
- J40
- the Components around U50
- for Dry Joints, Solder Shorts, damaged and skewed Parts
- replace missing or damaged Components
2.) If TX is still not working
check TX-Output at A1, L1, C7, J40, C45 and L47
check TX-Input at R80 (GSM) and R81 (DCS)
replace: - U50 (if not effective)
- U150