Nokia 6310 User manual

CONFIDENTIAL 1 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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Repair Hints
Service Level 3 & 4
6310 / 6310i
NPE-4 / NPL-1

CONFIDENTIAL 2 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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General
-How to use this document
Place the colored 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.
- Broken balls / underfill, µBGA
All replaceable (not underilled) µBGA components must be renewed after removing.
Reflow with uncontrolled hot air fan is strictly forbidden!
The µBGA must be soldered with NMP approved µBGA rework machines (e.g. Zevac / OK-Metcal / Martin) only .
Check the soldering points after removing a µBGA. Rework the oxidated solderings (broken balls) carefully by tinplating
these areas with few flux and a hot soldering iron, if it is necessary.
Before placing a new component remove the tin and clean the PCB, e.g. with help of soder wick and flux cleaner such as
“Kontakt LR”. Use only the mmended Fluxtype and an appropriate amount of it – avoid to wning the PCB in flux as this
will result in additional faults!
Also check underfilled parts for broken underfill material below. In this case carefully evaluate possible repair actions as
the phone probably was exposed to strong mechanical stress.
“rework” done with uncontrolled hot air PCB drowned in flux broken underfill of an µBGA part

CONFIDENTIAL 3 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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-PCB handling & cleaning
To avoid damages of PCB and/or components through electrostatic discharging, handle the module in
ESD-suitable cases only.
Outside an ESD-bag always wear ESD-bracelets, which must be connected to earth bonding point.
A damage caused by electrostatic discharge does not produce a directly apparent fault, but it will appear (however)
within shortest time.
For cleaning use appropriate materials only. Do not use scratching or rubbing tools.
Usefull tools for cleaning are fluxcleaners such as “Kontakt LR” or “Electrolube FLU” in connection with ionized
compressed air.
For shield disassembling or any other work on the PCB it is very important to place the PCB into the rework jig JBT-13U
(NMP-code 0770242) to prevent damaging the LEDs – the pads the LEDs are connected with to the PCB are torn off by
applying only little pressure onto the PCB!!!
-Component charactaristics
Some components contain important data 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.
-Shieldings, screw torques
To avoid RF-problems it is not allowed to reuse any shielding that once has been removed from shielding frame.
Always use new shieldings after successful repair!
To tighten screws only use a torque screwdriver with a torque adjusted to 17Ncm. Notice tightening order that is
shown in the picture below!
-Realign after repair
Characteristics of replacement may vary.
To prevent additional faults after repair (low standby,, 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!

CONFIDENTIAL 4 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 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 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 using this document.
It is 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 such as Service Bulletins.
Ffor that reason it does not contain any circuit descriptions or schematics.
All measurements are made by using the following equipment:
Nokia repair SW : Phoenix
Phoenix Application : 04.13.005
Flash SW (CMT) : 5.01 6310 / 5.50 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 the 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 5 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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Contents
PREFACE GENERAL 2
CHAPTER 1 Additional information 6
- BB shield removing instructions 6
- Different battery connectors 7
- Auto power off 7
NPE-4 (6310) & NPL-1 (6310i) 8
CHAPTER 2 CarKit problems 8
- “Phone not connected” or “Phone error” 8
- Problems Solved by the MCU SW 5.50(only NPL1) 8
CHAPTER 3 Totally dead/ “Does not switch on” 9
- Check current consumption 9
- Flash the phone 9
- Voltages and signals to check 10
NPE-4 6310 12
CHAPTER 4 Electrical faults 12
- Drop calls 12
- No service, memory problem 13
- No service, no RSSI 13
- RX flowchart 15
- No service, no TX 16
- TX flowchart 18
- Display too dark/ too light 19
CHAPTER 5 Hookswitch problems 20
- Sometimes not possible to release “incoming call” 20
- No voice dial possible 20

CONFIDENTIAL 6 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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NPL-1 6310i 21
CHAPTER 6 HW Changes 21
- Different UEM versions 21
- Value change of R133 & R134 21
- Replacement of C164 with R169 “Reduce noise on Headset HDC-9P” 21
- New Bluetooth module BT202 21
CHAPTER 7 No Service 22
- Drop calls 22
- No TX at GSM1800/1900 23
- No service flowchart 24
- “Phone restricted” error 25
CHAPTER 8 Keypad faulty 26
CHAPTER 9 BB Selftest explanation for NPE-4/NPL-1 27
CHAPTER 10 Change History 28

CONFIDENTIAL 7 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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Additional Information
BB shield removing instructions
For BB shield removing it is important to lay the PWB on level surface in away that the bottom connector does not
touch the underground to prevent bending of PWB and cracking of the connector’s solderings (See pictures below).
Wrong
Correct
When removing the BB shield, be very careful because the Flash D450 could be damaged (see pictures on the next
page). Start by lifting and bending the lid with tweezers at the marked points 1- 3 (see pictures below).
Do not use too much force on the frame because it could be damaged and also the PWB could be mechanically stressed.

CONFIDENTIAL 8 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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Example of a broken Flash D450:
Different battery connectors
There are two different battery connectors with the same part code 5400239 (see pictures below).
If it is necessary to exchange the battery connector X101/ X102, take care that you use the corresponding part.
Wrong replacement causes switch-off trouble.
Different surface, width and position of spring contacts:
Difference
Difference
Difference
Difference
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 so that the
phone has lost the contact to the battery.
Assemble the Y- and Z-Pads, as in the picture below.
For more information see SB-010 (NPE-4).
Battery Pad Y
Battery Pad Z

CONFIDENTIAL 9 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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NPE-4 6310 & NPL-1 6310i
Carkit problems (Daimler Chrysler & Mercedes Benz)
“Phone not connected” or “Phone error”
If “Phone not connected” or “Phone error” appears on the display while the phone charges, it is necessary
to find out the version of interface box DME-1. This can be done, by checking the product code on the label.
Only the new version “Ramses 6310” works with NPE-4 (6310) & NPL-1 (6310i) phones (see table).
Old versions New version
Project Ramses Ramses 6210 Ramses 6310
Product type DME-1E DME-1E DME-1E
Customer No. A 203 820 32 26 A 203 820 99 26 A 203 820 25 85
Product code 0630231 0630427 0630589 or 0630587
If new interface box version is needed, the customer should contact his Daimler Chrysler Dealer to get an “upgrade Kit”.
Note: It is also necessary to update the phone with the latest MCU SW version 5.01 / 6310 and 5.50 / 6310i or later
versions. See therefore SB 038 for 6310 and SB 030 for 6310i.
Problems solved by the MCU SW 5.50
The following fault descriptions are solved by the latest MCU SW 5.50
- “Switch to a defined Profile not possible”
In this case it is not possible to switch the profile to one from the user-defined profile (Menu →settings →accessory
settings →hands free →default profile →e.g general).
- “No ringing tone in CarKit”
This problem could occur if a user switches the phone to “silent” or “meeting” profile and has not switched to
“general” manually before. There will be no ringing tone in the CarKit even if “general” profile is set as default.
- “Echo”
The user hears an echo of the conversation partner.
- “Poor sound quality using HSU-1”
If the volume is too high, the sound quality gets poorer by using HSU-1
- “Resets”
Sometimes a reset occurs, especially when driving and starting or ending calls.

CONFIDENTIAL 10 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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Totally dead
The first thing to do in this case is to make a kind of precheck.
This should be done in the following order:
Check current consumption
After switching on the phone, the current consumption is initially around 120 mA for a few seconds.
Afterwards current lowers to around 70 mA (again for a few seconds) and finally goes down to 1-3 mA (sleepmode).
In cases where the phones have a current consumption around 11mA – 24 mA for about 32 seconds, the indication is
that flash (D450) or bluetooth module (V130) are empty or defective.
Flash the phone
The result of the flash procedure helps to encircle the reason for the fault and sometimes to solve the problem.
So it is absolutely necessary in this case to flash the phone before starting any repair action.
In the best case flash is only “empty”. The phone should “go on” after a succesful flash update.
- If the flash update is not succesful,check error messages of the failed flash update (see picture below).
Possible error message:
The failure codes C683 or C686 indicate in most cases a defective bluetooth module V130 (D200 & D400 also possible).
Other failure code messages give no certain indication about any defective component.
Flash (D450), UEM (D200), UPP (D400) or other defective components could distinguish the same or similar failure
messages.
Therefore, absolutely independently from the flash failure message and in every case after precheck procedure,
some voltages and signals should be checked to encircle the failure source.
Do not change the flash (D450) or bluetooth module (V130) before ensuring that following voltages and signals are OK!

CONFIDENTIAL 11 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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“Totally dead” voltages and signals to check
To make the following measurements it is necessary to press the power switch button on several times, otherwise all
signals and voltages are only visible for around 250ms (except VBATIN).
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 C210 (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 32kHz B200 circuit for shorts or disconnections.

CONFIDENTIAL 12 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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Check VCORE = 1.8 VDC at C400; PURX = 1.8 VDC at
V130 Pin 44. If not ok, check UEM D200.
Check System Clk = 26 MHz, Vpp = 800 mV at C752 for
NPE-4, and at R618 / for NPL-1 (See picture below)
Oscilloscope settings:
Ampl: 500mV
Time/Div: 20ns/Div
AC/DC/GND: AC
If not ok, check 26 MHz G740 (NPE-4) circuit /B601 (NPL-1) circuit.
This step is only for NPE-4.
For NPL-1 phones go one step further.
Check RFClk = 13 MHz, Vpp = 600 mV at C424.
If not ok, check/change N600 Hagar.
Check VIO = 1.8 VDC at C450. If not ok, check VIO line to UEM D200 for shorts or disconnections and change faulty
components.
Check VPP at C454 = 1.8VDC
If VPP is not ok - check C454. If UPP D400 is faulty, change PWB, because UPP is not changeable.
Check Vana at C278 = 2.8VDC
If not ok - check C278, if C278 ok - UEM D200 will be faulty. Change PWB, as UEM is not changeable.
Resume
Change Flash D450 in the following cases and if all signals and voltages described above are ok:
- Mechanical damages (see picture in Additional Information/Example of broken Flash D450 on page 7).
- IMEI not rewriteable or SIMLock Test fails.
- Failure code messages after failed flash update! Except codes C683 or C686 (change Bluetooth module in this case).
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 13 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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NPE-4 6310
Electrical faults
Drop calls
Disassemble the NPE-4 and the RF- shield, and then connect the PWB to the MJS-40 jig.
Insert a SIMcard and connect the coaxial cable to the tester (e.g. CMD). Now start a call.
After the call is established, check if the testers (e.g. CMD) analyzer display shows a frequency error.
If fault does not appear or appears intermittently only, press on 26MHz oscillator G740 with a 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 at C752 or R752 on spectrum analyzer and active frequency counter (see figure 26 MHz)
Figure “26 MHz”
If the frequency drift is higher than +/ - 100Hz, check VR3 (VCC) = 2.8 VDC at R740 and check AFC (1.3 – 2.3 VDC) at C744
- If not ok, check UEM D200.
Check if fault is getting stronger by pressing the top of the 26MHz oscillator G740. Change 26MHz oscillator if necessary.
Check 13 MHz +/- 100Hz at C424 with spectrum analyzer (see figure “13 MHz”).
Figure “13 MHz”
- If not ok, check /change Hagar N600.

CONFIDENTIAL 14 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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No service
Memory problem
Set phone to local mode with Phoenix.
Check RX calibration in GSM/PCN in Menu Tuning/RX Calibration.
If not ok, refer to chapter No Service/No RX.
Check TX power in GSM/PCN in Menu Tuning/TX power.
If not ok, refer to chapter No Service/No TX.
If RX and TX OK, insert Test-SIM and set phone to normal mode and 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).
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 the same frequency and
channel.
Check System Clk = 26 MHz at C752 (how to check see figure “26 MHz” at chapter “Drop calls” on page 12).
- If not ok, check VR3 = 2.8 VDC at C602 and Vcon (AFC) = 1.25 – 2.3 V, if ok change 26 MHz osc. G740.
Otherwise, go to next step.
Check RFClk 13 MHz at C424 (how to check see figure “13 MHz” at chapter “Drop calls” on page 12).
- If not ok, check / change Hagar N600.
Check RX I/Q signals at C721 and C722 as described on next page (see picture below).

CONFIDENTIAL 15 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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Make the following measurements 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).
Order of measurement points at C714 (counted from N600 Hagar side): pins (3/4)= DtoS I/Q;
pins (1/2)= Biquad (CM_F and CP_F I/Q).
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.
Check the following voltages:
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 voltages described above is not ok, check UEM D200.

CONFIDENTIAL 16 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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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
Check
RF Clk 13 MHz
at C424.
OK
Check / Change
N600 Hagar

CONFIDENTIAL 17 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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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

CONFIDENTIAL 18 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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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 System Clk is ok, check the 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 voltages described above is not ok, check UEM D200.
If all voltages are ok, change Hagar N600.

CONFIDENTIAL 19 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
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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
defective.
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 defective.
OK
nOK nOK
OK
nOK
OK
nOK
OK
nOK
OK
nOK
OK
nOK
OK

CONFIDENTIAL 20 (29)
NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
©NMP 2003 Checked by:
SCCE Training Group
Approved by:
SCCE
Display too dark/ too bright
V
300-V303
When switching on the phone, the display LED´s V300 – V303
(see picture below) show in different levels of brightness.
This is caused by the 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 aside
and some small components might be pushed away.