Nokia NPE-4 User manual

CONFIDENTIAL 1 (25)
NPE-4 6310/NPL-1 6310i Repairhints
Customer Care Europe & Africa Version 1.0 Approved
SCCE Training Group Date 15.08.2002
©NMP 2002 Checked by:
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Repairhints
Service-Level 3 & 4
6310/6310i
NPE-4/NPL-1

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NPE-4 6310/NPL-1 6310i Repairhints
Customer Care Europe & Africa Version 1.0 Approved
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©NMP 2002 Checked by:
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General
-How to use this document
Place the schematics behind this manual.
Now you are able to follow these specifictions with graphical layouts and it is easier for you to find the components and
measuring points.
-General handling
Be very careful when disassembling the NPE-4/NPL-1 while removing the A-Cover from the Back-Cover. Refer to disassembling
instructions at the service manual of NPE-4/NPL-1.
-µBGA components and broken balls
Special attention to µBGA components:
All replaceable µBGAs must be renewed after removing. Reflow using a hot air fan is not allowed.
Check soldering points and remove oxidated solderings (broken balls) carefully by enclosing a few new solders before placing new
components. The only allowed way changing µBGA components is to use µBGA rework maschines, approved from NMP (e.g.
ZEVAC/ OK International). Use recommended Fluxtype and an appropriate amount of it only.
-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.
Do not 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 moistening with DI-
water. IPA or other solvent like ethanol should only be used to clean gold pads for spring contacts without affecting the
surrounding copper layers.
-Component charactaristics
Some components contain important data.
Several described steps are practicable only if you are able to reflash/ realign the phone and/ or rewrite IMEI/ SIMlock in certain
cases. Please pay attention to separate notes.
-Realign after repair
Characteristics of replacement parts are different.
To prevent additional faults after repair (RX quality, TX power etc.) it is necessary to retune phone values.

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NPE-4 6310/NPL-1 6310i Repairhints
Customer Care Europe & Africa Version 1.0 Approved
SCCE Training Group Date 15.08.2002
©NMP 2002 Checked by:
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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 NPE-4 6310 / NPL-1 6310i.
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
Phoenix Application : 3.72.002
Flash SW (CMT) : 4.31 6310 / 4.80 6310i
Test Jig : MJS-40
Docking station : JBV-1
Docking Adapter : MJF-9
Digital Multimeter : Fluke 73
Oscilloscope : Fluke PM 3380A/B
Spectrum Analyzer : Advantest R3162 with an analogue probe
RF-Generator / : CMU 200
GSM Tester
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 following procedure:
Please state:
Title of the Document + Issue Number/Date of publication.
Page(s) and/or Figure(s) of error.
Please send to: Nokia GmbH
Technical Services E&A
Meesmannstr.103
D-44807 Bochum / Germany
Email: [e-mail]
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.

CONFIDENTIAL 4 (25)
NPE-4 6310/NPL-1 6310i Repairhints
Customer Care Europe & Africa Version 1.0 Approved
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Contents
PREFACE GENERAL 2
CHAPTER 1 Additional information 5
- BB shield disassembling instructions 5
- Different battery connectors 6
- Auto power off 6
CHAPTER 2 Electrical faults 7
- Totally dead 7
- Drop calls 9
- No Service 9
- No Service Flowchart 10
- No service, no RSSI 11
- RX Flowchart 12
- No service, no TX 13
- TX Flowchart 15
- Display to dark/ too light 16
CHAPTER 3 Tuning problems with Phoenix SW 3.72.002 17
- Tuning problem with FPS-8 17
- RX Channel Select Filter calibration all measurements=“0”at GSM1800 17
- TX tuning problem 17
CHAPTER 4 SW faults 17
- Totally dead 17
- Phone jammed 17
- No memory access/ hangs up 17
- No service 17
CHAPTER 5 Hookswitch problems 18
- Sometimes not possible to release “incoming call” 18
- No voice dial possible 18
NPL-1 6310i
CHAPTER 6 No Service 19
- Drop calls 19
- No TX at GSM1800/1900 19
- No service Flowchart 21
CHAPTER 7 Keypad faulty 22
CHAPTER 8 BB Selftest explanation for NPE-4/NPL-1 23
CHAPTER 9 Change History 25

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NPE-4 6310/NPL-1 6310i Repairhints
Customer Care Europe & Africa Version 1.0 Approved
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Additional Information
BB shield disassembly instructions
For disassembly it is important to lay the PWB on a plane underground so that the bottom connector is hanging free to prevent
bending of PWB and cracking of the connector´s solderings (See pictures below).
Wrong
Correct
When disassembling the BB shield be very careful because Flash D450 could be damaged (See pictures on next page).
Start by lifting and bending the lid with a tweezer at the marked points 1- 3 (see pictures below).
Do not use too much force on the frame because it could be damaged and the PWB also could be mechanical stressed.

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NPE-4 6310/NPL-1 6310i Repairhints
Customer Care Europe & Africa Version 1.0 Approved
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Example for a broken Flash D450:
Different battery connectors
There are two different battery connectors under the same part code 5400239 (See pictures below).
If it is nessesary to exchange the battery connector X101/ X102 take care that you use the same one.
The mixed replacement causes switch-off trouble.
Different surface, width and position of spring contacts:
Note! It is not allowed to use the battery connectors of NPE-3 (part code 5469069) because of smaller size.
Auto power off
The phone turns off, because the contact pads on the battery and the battery connectors are worn out and the phone has lost the
contact to the battery.
Assemble the Y- and Z-Pads, see picture below.
For more information see SB-010.
Battery Pad Y
Battery Pad Z
Difference
Difference
Difference
Difference

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NPE-4 6310/NPL-1 6310i Repairhints
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Electrical faults
Totally dead
Check VBATIN=3.6 VDC at L260 (depends on workbench supply). If not ok, check X101, X102 battery connectors for mechanical
damages or cold solderings. Refer also to chapter “Additional Information/Different battery connectors”.
Check 32.768 kHz sinewave, Vpp = 800 mV at C209 (See picture below).
Oscilloscope settings:
Ampl: 200mV
Time/Div: 10µs/Div
AC/DC/GND: AC
If there is no signal, check B200 circuit for shorts or disconnection and change faulty components.
Check PWRONX at S300 pin 2/ 4: Key not pressed = 3.6 VDC (Depends on Workbench supply voltage)
Key pressed = 0 VDC
If not ok, check PWRONX-line from S300 to UPP D400 for shorts or disconnections.
Check SleepClk = 32.768 kHz, Vpp = 1.8 V square wave at J404. (See picture below)
Oscilloscope settings:
Ampl: 500mV
Time/Div: 10µs/Div
AC/DC/GND: AC
If not ok, check B200 circuit for shorts or disconnections.
Check VCORE = 1.8 VDC at C400. If not ok, check UEM D200
Check PURX = 1.8 VDC at V130 Pin 44. If not ok, check UEM D200
Check System Clk = 26 MHz, Vpp = 800 mV at C752 (See picture below)

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Customer Care Europe & Africa Version 1.0 Approved
SCCE Training Group Date 15.08.2002
©NMP 2002 Checked by:
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Oscilloscope settings:
Ampl: 500mV
Time/Div: 20ns/Div
AC/DC/GND: AC
If not ok, check 26 MHz G740 circuit. Refer also to chapter Drop calls
Check RFClk = 13 MHz, Vpp = 600 mV at C424. If not ok, refer to No service/ No RSSI.
Check VIO = 1.8 VDC at C450. If not ok, check VIO line to UEM D200 for shorts or disconnections and change faulty components.
If all above-mentioned signals are ok, try to flash the phone.
If the the flash update fails, the prommer will display a fault message (see picture below)
Check VPP at C454 = 1.8VDC
If VPP is not ok, UPP D400 is faulty. Change PWB, because UPP is not changeable.
Check VFLASH2 at C280 = 1.8VDC
If not ok, UEM D200 is faulty. Change PWB, as UEM is not changeable.
If both voltages are ok, try to flash the phone with repair jig MJS-40 and measure the VFLASH2 again. Now the voltage at C280
rises up to 2.8VDC.
If the voltage does not rise up to 2.8VDC, change PWB, as the UEM D200 is not changeable.
If all voltages are ok, check the Flash for mechanical damage (see also picture at chapter Additional
information/BB shield disassembly instructions/Example for a broken Flash D450).
Change Flash D450 in following cases when all other signals ok:
- Mechanical damages (See picture at Additional Information/Example for broken Flash D450)
- IMEI not rewriteable or SimLock Test fails
After changing the Flash D450, rewrite product code, HW-ID, IMEI and SIMlock settings.
If the fault persists, probably UEM D200 is faulty and not changeable. Change the PWB.
Note! Rewrite SIMlock and IMEI data by use of NOKIA SECURITY PASSWORD and tune the phone again, if the procedure
is permitted to you. (See General SB–037)

CONFIDENTIAL 9 (25)
NPE-4 6310/NPL-1 6310i Repairhints
Customer Care Europe & Africa Version 1.0 Approved
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©NMP 2002 Checked by:
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Drop calls
Disassemble the NPE-4 and the RF- shield, then connect the PWB to the MJS-40 jig.
Insert a SIMcard and connect the coaxial cable to the tester (e.g. CMD/Wavetec). Now start a call.
If the call is established, check the analyzer display from tester (e.g. CMD/Wavetec) shows a frequency error.
If fault does not appear or appears intermittently only, press on 26MHz oscillator G740 with non-metallic item.
If the frequency error appears or increases in this case, probably the 26MHz circuit is faulty.
Open the Phoenix menu Testing/ RF controls and activate local mode RX GSM900
Check 26MHz +/- 100Hz between C752 and R752 with spectrum analyzer and active frequency counter (See picture below)
If the frequency drift is higher than +/ - 100Hz, check VR3 (VCC) = 2.8 VDC at R740.- If not ok, check UEM D200.
Check AFC (around 1.3 VDC) at G740. Check also if VR3 (VCC = 2.8 VDC) is ok with an Oscilloscope.- If not ok, check UEM D200
If both voltages are ok but the frequency drift is higher than +/ - 100Hz and the fault is getting stronger when pressing the top of
the 26MHz oscillator G740, change the faulty component.
No service
Set phone to local mode with Phoenix
Open menu Maintenance/Tuning/RX Calibration
Check RX calibration in GSM/PCN. If not ok, refer to chapter No Service/No RX
If RX calibration is ok, open menu Maintenance/Tuning/TX power
Check TX power in GSM/PCN. If not ok, refer to chapter No Service/No TX
If TX power is ok, insert Test-SIM and set phone to normal mode.
Start a Test call If not ok, make a SW update and try connecting again.
If the fault persists after SW update, rewrite IMEI and SIMLock settings.
Note! Rewrite SIMlock and IMEI data by use of NOKIA SECURITY PASSWORD and make a SW-update again, if the
procedure is permitted to you. (See General SB–037)
If the connection is established, check with tester (e.g. CMD/Wavetec) if any errors appears on display (e.g. frequency error).
If a frequency error appears, refer to chapter Drop calls.

CONFIDENTIAL 10 (25)
NPE-4 6310/NPL-1 6310i Repairhints
Customer Care Europe & Africa Version 1.0 Approved
SCCE Training Group Date 15.08.2002
©NMP 2002 Checked by:
SCCE Training Group
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SCCE
Flowchart – No service
No Service
Set phone with Phoenix
to Local Mode
Open menu
Maintenance/Tuning/RX
calibration
Check RX calibration
in
GSM/PCN
Check TX power at menu
Maintenance/Tuning/TX power
Refer to chapter
No Service/No RX
Refer to chapter
No Service/No TX
If the fault persists,
rewrite IMEI/SIMLock
settings are not ok
Check
CMU/CMD if
any errors appear on display,
e.g.frequency
errors
Refer to chapter
Drop calls
Insert a Test Sim,
set phone to normal
mode
and make a Test call
Connection
established?
Phone is ok
Make a sw update and try
connecting again
nOK
nOK
nOK nOK
nOK
OK
OK
OK
OK OK
OK