Customer Care Europe & Africa NHM-7 Repairhints
SCCE Training Group Version 1.0 Approved
2002 Nokia Mobile Phones
CONFIDENTIAL 1 (18)
Date 28.02.2002
Repairhints
8310
NHM-7
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Customer Care Europe & Africa NHM-7 Repairhints
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2002 Nokia Mobile Phones
Date 28.02.2002
GENERAL
-about Phoenix
When changing the phone mode with Phoenix, note that it is not possible to activate local mode directly from normal mode –
change to test mode first! In normal mode the phone works as it would be supplied by the normal phone battery. In local mode
the watchdog is disabled while in test mode only MCU-software is working without loading the PPM-file.
Using JBV-1 it is possible to change to local mode by suppling JBV-1 with +12VDC. If JBV-1 is supplied with +4VDC you have to
change the phone mode manually with Phoenix.
When using service jig MJS-46 take care not to supply more than +12VDC – the jig will surely be damaged!
-Component characteristics
Some components contain important data.
Several described steps are only practicable 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, µBGA
All replaceable µBGA-components must be renewed after removing. Reflow with hot air fan is not allowed!
Check soldering points, remove oxidated solderings (broken balls) carefully by enclosing few new solder before placing new
components.
µBGA must be soldered only with NMP approved µBGA-rework machines (e.g. Zevac/OK International).
Only use recommended Fluxtype and an appropriate amount of it.
-PCB handling & cleaning
To avoid damages of PCB and/or components through electrostatic discharging, handle the module in
ESD-suitable cases only. Always wear ESD-bracelets, which must be connected to earth bonding point.
Don´t make any loose wiring connections or do some other unqualified rework anywhere.
For cleaning use appropriate materials only, do not use scratching or rubbing tools.
Because of organic surface protection (OSP), cleaning must only be done with a lint-free cloth which may be moisten with DIwater. IPA or other solvent like ethanol should only be used to clean gold pads for spring contacts without affecting the
surrounding copper layers.
-Realign after repair
Characteristics of replacement parts are different.
To prevent additional faults after repair (eg. low standby time, loosing network etc.) it is necessary
to retune phone values after repair.
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CONFIDENTIAL 3 (18)
Customer Care Europe & Africa NHM-7 Repairhints
SCCE Training Group Version 1.0 Approved
2002 Nokia Mobile Phones
Date 28.02.2002
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 8310 phones.
It contains a lot of collected tips and hints to find failures and repair solutions easily.
It also will give support to the inexperienced technicians.
Saving process time and improving the repair quality is the aim of using this document.
We have built it up based on fault symptoms (listed in "Contents") followed by detailed description for further analysis.
It is to be used additionally to the service manual and other service information like Service Bulletins. For that reason it does
not contain any circuit descriptions or schematics.
All measurements are made using following equipment:
Nokia repair SW : Phoenix version 03.40.00
Data package : Version 4.0
Digital multimeter : Fluke 73
Oscilloscope : Hitachi V-1565; Fluke PM 3380A/B
Spectrum Analyzer : Advantest R3162 with an analogue probe
RF-Generator / : Rohde & Schwarz CMU 200
GSM Tester
While every endeavour has been made to ensure the accuracy of this document, some errors may exist. If any errors are found by
the reader, NOKIA should be notified in writing, using 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.
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2002 Nokia Mobile Phones
Date 28.02.2002
Contents
PREFACE 2
General 2
Introduction 3
CHAPTER 1 PHONE DOES NOT SWITCH ON 5
CHAPTER 2 PHONE SWITCHES ITSELF OFF 7
CHAPTER 3 FLASH UPDATE NOT POSSIBLE 8
CHAPTER 4 SIMCARD FAULTS 9
CHAPTER 5 AUDIO FAULTS 10
CHAPTER 6 CHARGING FAULTS 11
CHAPTER 7 USER INTERFACE FAULTS 12
CHAPTER 8 NO SERVICE 13
CHAPTER 9 RX DOES NOT WORK 16
CHANGE HISTORY 18
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CHAPTER 1 PHONE DOES NOT SWITCH ON
Phone does not switch on
Check if
current consumption
is higher than
1 Ampere
no
yes
Usually N700 faulty
(remove L703 to ensure)
check if
current consumption
is around 15mA
(in Servicejig supplied with
4VDC)
no
check VBATT
4VDC at both sides of Z260-
Z265
OK
check 32.768kHz
at C209/210
OK
check that
PWRONX decreases to 0V if
powerswitch is pressed
OK
check that
VIO, VCORE, VANA, VFLASH1
and VR3 rise to their intended
values
nOK
nOK
yes
nOK
nOK
Try to make SW-update,
continue with section
"Flash update not possible" if
not ok
Check X101, also check
resistance of Z260-Z265
(0 Ohm)
change B200,
also check C209/210.
Probably D200 faulty
check / change
S300, R301
check lines for shorts to ground
or interruption, change UPP if
necessary
check 13MHz reference clock at
© NMP 2002
OK
R420
OK
Check PURX 1.8VDC at J402
Try to flash the phone.
If SW-update does not work,
continue with chapter
"Flash update not possible"
nOK
nOK
Checked by:
Check / change
G660, N600
UEM D200 faulty in all
probability
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PHONE DOES NOT SWITCH ON
X101
- check mechanical appearance of battery connector. Change part if it is bent, soiled or corroded.
S300
- check mechanical appearance of powerswitch, change if necessary.
- check voltage at S300, 3.8VDC in case that switch is not pressed. If voltage is not measureable or too low especially check
R301 and C312.
- if switch is pressed, voltage at S300 must decrease to 0V. Change switch if necessary.
B200
- check DC-voltages at C209 and C210, normally 0.5VDC. If voltages are not ok check C209/210 for shorts to ground. It also
is possible that UEM D200 is defect.
- if DC-voltages are ok but no 32.768kHz signal is measurable at C209/210 change the crystal B200.
Note that this signal must be always measurable if battery voltage is higher than 3.1VDC, even if phone is switched off! In
this case amplitude of 32.768kHz is a bit lower (700mVpp at C209, 550mVpp at C210).
D200
- at this time it is not useful to change this part. IMEI and Simlockdata must be reconstructed in case that UEM has been
changed. This is not possible up to now, but it is planned to make this possible in the future.
D450
- in case that phone does not switch on while current consumption stays on 15mA (in Service jig supplied with 4VDC) this
indicates that Flash D450 probably is empty. Try to make SW-update. If any failuremessage appears during flashing, try
SW-update a second time. It also can be necessary to change D450. Note that in this case you have to rewrite IMEI, Simlock
data and Product code, furthermore you have to run all RX/TX-tunings and energy management calibration!
G660
- check voltage at C662, 2.8VDC
- check signal of 26MHz reference oscillator at C660:
With the voltage of 2.8VDC at C662 the oscillator
must be able to work on a frequency around 26MHz, else
you have to change G660.
N700
- in case you suppose a defect poweramplifier N700 to be responsible for the fault, first of all check the current consumption
of the phone. If current rises to more than 1 Ampere directly after connecting the phone to the servicebattery, remove
coil L703 and check current consumption again. If current is ok now you have to change poweramplifier N700 with help of
µBGA soldering machine and LGA rework kit LRK-1.
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