nem1_repairhints_v1_0.pdf

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Customer Care Europe, Middle East & Africa
SCCE Training Group
2003 Nokia Mobile Phones
CONFIDENTIAL
NEM-1
Date 05-12-2003
1 (15)
Repair Hints
Version 1.0 Approved
Repair Hints
Service-Level 3 & 4
3300
NEM-1
©
NMP 2003
Checked by: SCCE
Approved by: Training Group
Customer Care Europe, Middle East & Africa
SCCE Training Group
2003 Nokia Mobile Phones
CONFIDENTIAL
NEM-1
Date 05-12-2003
2 (15)
Repair Hints
Version 1.0 Approved
GENERAL
- How to use this document
Put the colored schematics behind this manual.
Now you are able to follow these specifications with graphical layouts and it is easier for you to find the components
and measuring points.
- Component characteristics
Some components contain important data such as tuning values or security data; therefore several steps described are
only feasible if you are able to reflash/ realign the phone and/or rewrite IMEI/SIMlock in certain cases. Please pay
attention to separate notes.
- Broken balls, µBGAs
All replaceable (not underfilled) µBGA components must be renewed after removing. Reflow with uncontrolled hot-air
fan is strictly forbidden! µBGA must only be soldered with NMP approved µBGA rework machines (e.g. Zevac/ OK-Metcal/
Martin) to get durable soldering joints. It is also not recommended only to reflow the old µBGA using a µBGA rework
station!
After removing a µBGA check soldering points; if necessary rework oxidated solderings (broken balls) carefully by
tinplating these areas with few flux and a hot soldering iron. Before placing a new component remove the tin and
clean the PWB; e.g. with help of solder wick and flux cleaner such as “Kontakt LR”.
Use only recommended flux type and an appropriate amount of it – avoid drowning the PWB in flux as this will result in
additional faults!
“rework” done with uncontrolled hot-air
PWB drowned in flux
oxidized pads
©
NMP 2003
Checked by: SCCE
Approved by: Training Group
Customer Care Europe, Middle East & Africa
SCCE Training Group
2003 Nokia Mobile Phones
CONFIDENTIAL
NEM-1
Date 05-12-2003
3 (15)
Repair Hints
Version 1.0 Approved
- PWB handling & cleaning
To avoid damages of PWB and/or components through electrostatic discharging, handle the module in
ESD protected areas only (as shown on next page). When handling PWBs outside an ESD-bag always wear ESD-
wristbands, which must be connected to earth bonding point, and gloves to avoid corrosion and fingerprints. Damage
by electrostatic discharge often leads to a module not failing directly but after a short period of time!
For cleaning use only appropriate materials, do not use scratching or rubbing tools. Useful tools for cleaning are flux
cleaners such as “Kontakt LR” or “Electrolube FLU” in connection with ionized compressed air (See also General SB 163).
For any other rework on the PWB always place the PWB into the rework jig MJS-74 (NMP-code 0770464) to prevent
damaging e.g. connectors.
- Screw torques
To tighten screws only use a torque screwdriver with a torque adjusted to 25Ncm. Notice tightening order that is
shown in the picture below.
- Realign after repair
Characteristics of replacement parts may vary.
To prevent additional faults after repair (e.g. low standby time, losing network etc.) it is necessary to retune phone
values after repair; but never try to cover up a fault by justing the phone settings!
- Fault report in fault log (Phoenix)
It is very important to report all repaired failures in fault log after finishing the complete phone repair.
The report content should only contain the self-observed fault symptom, except “no fault found”.
In this case the report content should contain the symptom code that is given by the customer
e.g “Does not switch on”(2101) and the fault code“no fault found”(470).
If the symptom code from the customer is not the same as the observed symptom, use always the self-observed
symptom code.
©
NMP 2003
Checked by: SCCE
Approved by: Training Group
Customer Care Europe, Middle East & Africa
SCCE Training Group
2003 Nokia Mobile Phones
CONFIDENTIAL
NEM-1
Date 05-12-2003
4 (15)
Repair Hints
Version 1.0 Approved
ESD PROTECTION REQUIREMENTS
Electrostatic discharge can easily damage the sensitive components
of electronic products. Therefore, every Service Partner has to take
care of at least some precautions, such as ESD restricted area, floor,
table, covering, chair(s), shoes or wristbands.
For further information refer to the Partner Web Site document
“Service Partner Requirements”
example configuration of an epa-area
source:
www.armeka.com
example configuration of a workbench
source:
www.warmbier.com
example workbench and testers
source:
http://www.armekaengineering.com
©
NMP 2003
Checked by: SCCE
Approved by: Training Group
Customer Care Europe, Middle East & Africa
SCCE Training Group
2003 Nokia Mobile Phones
CONFIDENTIAL
NEM-1
Date 05-12-2003
5 (15)
Repair Hints
Version 1.0 Approved
Introduction
IMPORTANT:
This document is intended for use by authorized NOKIA service centers only.
The purpose of this document is to provide some further service information for NOKIA 3300 phones.
It contains a lot of collected tips and hints to find faults and repair solutions easily.
It also will give support to inexperienced technicians.
Saving process time and improving the repair quality is the aim of this document.
It is built up based on fault symptoms (listed in "Contents"), followed by detailed description for further analysis.
The document is to be used additionally to the service manual and other service information such as service bulletins.
For that reason it does not contain any circuit or schematic diagrams.
All measurements are made using following equipment:
Nokia repair SW:
MCU SW:
Nokia module jig:
Docking station adapter:
Digital multimeter:
Oscilloscope:
Spectrum Analyzer:
RF-Generator / GSM Tester:
Phoenix version A9 2003 25.3.16
DP 5.1 / MCU-SW 4.25
MJ-6
MJF-22
Fluke 73
Fluke PM 3380A/B
Advantest R3162 with an analog probe
Rohde & Schwarz CMU 200
While every endeavour has been made to ensure the accuracy of this document, some errors may exist. If the reader
finds any errors, NOKIA should be notified in writing, using the following procedure:
Please state:
title of the document + issue number/date of publication.
page(s) and/or figure(s) in error.
Please send to:
Nokia GmbH
Service & Competence Center Europe
Meesmannstr.103
D-44807 Bochum / Germany
Email:
training.sace@nokia.com
Copyright © Nokia Mobile Phones.
This material, including documentation and any related computer programs is protected by copyright, controlled by
Nokia Mobile Phones. All rights are reserved. Copying, including reproducing, modifying, storing, adapting or
translating any or all of this material requires the prior written consent of Nokia Mobile Phones. This material also
contains confidential information, which may not be disclosed to others without the prior written consent of Nokia
Mobile Phones.
©
NMP 2003
Checked by: SCCE
Approved by: Training Group

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