Nokia NPE-4 User manual

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NPE-4 6310/NPL-1 6310i Repairhints
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Repairhints
Service-Level 3 & 4
6310/6310i
NPE-4/NPL-1

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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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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)
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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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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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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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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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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)

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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.

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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

CONFIDENTIAL 11 (25)
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No Service →
→→
→no RSSI
Set the RF generator to GSM 942.4 MHz at channel 37, RF level –55 dBm and also the phone to same frequency and channel.
Check RX I/Q signals at C721, C722 (See picture below)
Always measure in burst mode (with an oscilloscope in DC mode).
Oscilloscope settings:
Ampl: 200mV
Time/Div: 1ms/Div
AC/DC/GND: DC
If not ok, check 67.71 kHz at C714 (DtoS and Biquad filter).
Measurement points at C714 count from N600 Hagar side: At first pins (3/4)= DtoS I/Q;
and then pins (1/2)= Biquad (CM_F and CP_F I/Q).
All measurements made in Burst Mode (with an oscilloscope in DC mode).
DtoS Biquad
Oscilloscope settings:
Ampl: 500mV
Time/Div: 200µs/Div
AC/DC/GND: DC
If the signal is not ok, check in GSM the RX signal 942.4 MHz at channel 37, RF level –55 dBm at L626.
If the signal is not ok, check in PCN the RX signal 1842.4 MHz at channel 700, RF level –55 dBm at L616
If both RX signals not ok, check RX lines from N600 Hagar to X802 antenna connector for shorts or
disconnections.
If the RX signals are ok, check System Clk = 26 MHz at C752 (See picture at chapter “Electrical faults”/ Totally dead)
If also the System Clk is ok, check following voltages:
Check VR3 = 2.8 VDC at C602.
Check VR4 = 2.8 VDC at C601
Check VR5 = 2.8 VDC at C604
Check VR6 (VBB) = 2.8 VDC at C605
Check VR1A (VCP) = 4.7 VDC (supply for control voltage VC for SHF oscillator) at C600
Check VR7 = 2.8 VDC at C299 (supply voltage VCC for SHF oscillator)
Check VREF01 and VREF02 = 1.35 VDC at R726
If one of the upper described voltages is not ok, check UEM D200.
If all voltages are ok, change N600 Hagar.

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Flowchart - No service →
→→
→no RX
No Service /
No RSSI
Set Phone to RX-Burst-Mode.
Set RF Generator to Ch. 37,
RX-level -55 dBm
Set Spectrum Analyzer to
RX EGSM 942.4 MHz,
.
Check
RX I/Q-Signal 67.71 kHz
,Vpp=1.1V at C721 (set
oscilloscope to DC-Mode)
500 mV, Time base
1 ms.
Check
Dtos 67.71 kHz
at C714.
Check
RX-Signal 942.4 MHz,
at L626
Check
Sys CLK 26 MHz
Vpp = 800 mV at
C752
Check
following voltages:
VR3 = 2.8 VDC at C602; VR1A = 4.7 VDC
at C600; VR4 = 2.8 VDC at C601;
VR5 = 2.8 VDC at C604; VR6 = 2.8 VDC
at C605; VR7 =2.8 VDC at R630;
VREFRF01 & VREFRF02
= 1.35 V at R726
Change N600
Hagar
Check D200
UEM
Check G740 26 MHz
oscillator circuit
Check
PCN RX-Signal
1842.4 MHz, Ch. 700,
at L616
Check RX-line to X102
antenna connector for
shorts or disconnections
Check
CP_F I/Q (BIQUAD)
67.71 kHz
at C714
Check
C714 for cold or
broken
solderings.
Change N600
Hagar
Change C714
Check
following voltages :
VR4 = 2.8 VDC at C601;
VR6 = 2.8 VDC
at C605
OK
nOK
nOK
OK
OK
OK
OK
nOK
nOK
OK
nOK
nOK
nOK
nOK
Check D200
UEM
Change N600
Hagar
nOK
OK
OK
OK

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No service →
→→
→no TX
Check EGSM TX signal at R656 / R657 (See picture below)
Set spectrum analyzer to TX EGSM 897.4 MHz, channel 37.
Set phone to TX mode, EGSM 897.4 MHz, channel 37 and power level 10.
If there is no signal measurable, check PCN TX signal at L662 (See picture below)
Set spectrum analyzer to TX PCN 1747.8 MHz, channel 700.
Set phone to TX mode, PCN 1747.8 MHz, channel 700 and power level 10.
If both TX signals ok, check EGSM/ PCN TX lines between Hagar N600 and antenna connector X802 for shorts or disconnections
If there is no TX signal measurable at L662, check TX I/Q at C764 and C766 on both sides of capacitors.
(See picture below)
Oscilloscope settings:
Ampl: 500mV
Time/Div: 1ms/Div
AC/DC/GND: DC
If the TX I/Q signal is not ok, check UEM D200

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Check TXC at C761, power level 19 and 5. (See picture below)
Oscilloscope settings:
Ampl: 500mV
Time/Div: 10ms/Div
AC/DC/GND: AC
Power level 19 Power level 5
If the TXC signals are not ok, check UEM D200
Check TXP signal at J760. (See picture below)
Oscilloscope settings:
Ampl: 500mV
Time/Div: 1ms/Div
AC/DC/GND: AC
If the TXP signal is not ok, check UPP D400.
Check System Clk = 26 MHz at C752 (See picture at chapter Electrical faults/ Totally dead)
If also the Sys Clk is ok, check following voltages:
Check VR3 = 2.8 VDC at C602 (supply voltage for 26 MHz oscillator G740).
Check VR4 = 2.8 VDC at C601
Check VR5 = 2.8 VDC at C604
Check VR6 (VBB) = 2.8 VDC at C605
Check VR1A (VCP) = 4.7 VDC at C600 (control voltage VC for SHF oscillator).
Check VR7 = 2.8 VDC at C299 (supply voltage VCC for SHF oscillator).
Check VREF01 and VREF02 = 1.35 VDC at R726
If one of the upper described voltages is not ok, check UEM D200.
If all voltages are ok, change Hagar N600.

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Flowchart - No service →
→→
→no TX
Set Phone to TX -Mode
EGSM 897.4 MHz,
Ch. 37, power level 10.
Set Spectrum Analyzer to
TX EGSM 897.4 MHz, Ch.37
Check TX
EGSM 897,4 MHz
at R656.
Check TX
PCN 1747.8 MHz
at L602.
Check TX I/Q
67.71 kHz signal at
C764 and C766 at
both sides.
Check UEM D200
Check
TXP VDC > 1.8 V
at C760 with
oscilloscope
Check TXC
signal at C761
with oscilloscope.
Check UPP D400
Check UEM D200
Check 26 MHz
at C752.
Check the
following voltages:
VR2 = 2.8 VDC at C294; VR3 = 2.8 VDC at
C602; VR4 = 2.8 VDC at C601;
VR5 = 2.8 VDC at C604; VR6 = 2.8 VDC at
C605; VR7 = 2.8 VDC at C299;
VrefRF01 & VrefRF02 = 1.35 VDC at R726;
VR1A = 4.7 V at R600
Hagar N600
defect.
Check UEM D200
Check 26 MHz
circuit, especially
G740
No Service/
No TX EGSM/PCN
Set Phone to TX -Mode
PCN 1747.8 MHz,
Ch.700, power level 10.
Set Spectrum Analyzer to
PCN 1747.8 MHz, CH. 700
Check TX EGSM/PCN path from
Hagar to X802 antenna connector
for shorts or disconnections.
Probably N840 defect.
OK
nOK nOK
OK
nOK
OK
nOK
OK
nOK
OK
nOK
OK
nOK
OK

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Display too dark/ too bright
When turning on the phone, the display LED´s V300 – V303
(See picture below) shine in different brightness.
This is caused by use of different LEDs. In this case change all LEDs and
assemble the right ones with spare part code 4864293.
Note! When changing the LEDs, first the RF frame has to be removed.
Be very careful when lifting the frame with hot air. A little drift beside
and some small components might be pushed away.
V
300-V303

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Tuning problems with Phoenix SW 3.72.002
Tuning problem with FPS-8
If the NPE-4 is connected to FPS-8 Flashbox via FBUS-cable, the reset does not work. When closing the energy management
calibration window, Phoenix tries to reset the phone. The NPE-4 goes in off state and does not start again automatically. In this
case the phone has to be switched on manually.
RX Channel Select Filter calibration all measurements = “0” at GSM1800
There is a misleading information in RX Channel Select Filter calibration at GSM1800. All values are “0” after tuning the “RX
Channel Select Filter calibration” under menu “Tuning/ RX Channel Select Filter calibration”. The shown information is wrong.
Tune the phone only in GSM900. These values are the same also for GSM1800.
For more information look at SB-026.
TX tuning problem
When starting TX tuning without connected coaxial cable to X802 antenna connector and going to power level 8 or higher, the
phone goes in reset state.
Everytime when tuning the phone first connect the coaxial cable and then start the tuning procedure.
SW faults
Totally dead
Phone jammed
No memory access/ hangs up
No service
If one of the above mentioned faults happens, first try to flash the phone with SW version 4.31 or newer.
If the fault persists refer to chapter Electrical faults/ totally dead

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Hookswitch problems
Sometimes not possible to release “incoming call”
No voice dial possible
When the headset HDC-9P is connected to the botton connector of NPE-4 and a call is coming in, often it is not possible to
release the call by pressing the hookswitch.
Often it is also not possible to initiate the voice call by pressing the hookswitch.
If one of the above mentioned problems occures, the changing of R175 can solve the problem.
Open the BB-shield and measure the resistor R175=100kΩ
ΩΩ
Ω.
If R175=100kΩ
ΩΩ
Ω,change the resistor to 15kΩ
ΩΩ
Ω.(See pictue below).
Note! Up to HW-ID 06.01 there is a 100kΩ
ΩΩ
Ωresistor. From HW-ID 06.02 the value has changed to 15kΩ
ΩΩ
Ω.
For more information also see SB 024
100kohm
15kohm

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NPL-1 6310i
No service
Drop calls
No TX 1800/1900
Insert Test Sim into phone and try to establish a connection at GSM900/1800 and 1900 with e.g. CMD/Wavetec.
If a connection is established try to make a call. Find out which TX band is faulty.
If a connection is possible in GSM900 only, refer to No GSM1800/1900 later on in this chapter.
Drop calls
If, in all GSM Bands, a connection is possible, but the bit error rate is to high and the connection is bad, set phone too local mode
and check TX spectrum at R805 (GSM900) and (See picture below)
Bad spectrum spectrum ok
If the spectrum is not ok, check following measurement points:
VIO = 1.8VDC at R630
VR1A = 4.7VDC at R623
VR2 = 2.8VDC at C622
VR3 = 2.8VDC at R610
VR4 = 2.8VDC at C296
VR5 = 2.8VDC at R628
VR7 = 2.8VDC at C299
TX I and Q at C715/C716 on both sides (See picture below)

CONFIDENTIAL 20 (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
Approved by:
SCCE
Oscilloscope settings:
Ampl: 500mV
Time/Div: 1ms/Div
AC/DC/GND: DC
If one of the four TX I/Q signals are missing or to low (TX IN, TX IP and TX QN, TX QP), check R713 on both sides.
If TX I/Q signals towards UEM D200 are not ok, UEM or PWB is faulty.
If one of the voltages is missing, probably UEM D200 is faulty.
If all signals towards RF-IC N601 are ok, change Mjoelner N601.
No TX 1800/1900
Check VAPC_DCS signal at R821 (See picture below)
Use Phoenix and open menu Maintenance/RF controls. Set phone to TX 1800 / Powerlevel 0 and/or 15
Oscilloscope settings:
Ampl: 50mV
Time/Div: 2ms/Div
AC/DC/GND: DC
Powerlevel 0
Powerlevel 15
If there is no signal measureable, check R821, R820 and C832 for cold or broken solderings and resolder or change if necessary. If
all three components are ok, change N601 Mjoelner.