Nokia 3310 User manual

CONFIDENTIAL 1(44)
NHM—2/5/6 Repairhints
Customer Care Europe, Middle East & Africa 3410 Version 4.0 Approved
SCCE Training Group Date 20.11.2002
©NMP 2002 Checked by:
Customer Care E&A
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Repairhints
Service-Level 3 & 4
3310/3330/
3410
NHM-2/5/6

CONFIDENTIAL 2(44)
NHM—2/5/6 Repairhints
Customer Care Europe, Middle East & Africa 3410 Version 4.0 Approved
SCCE Training Group Date 20.11.2002
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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.
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 strictly forbidden!
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.
Do not make any loose wiring connections or do some other unqualified rework anywhere.
For cleaning only use appropriate materials, 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 moistened 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.
-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. But never try to cover a fault by tuning.

CONFIDENTIAL 3(44)
NHM—2/5/6 Repairhints
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SCCE Training Group Date 20.11.2002
©NMP 2002 Checked by:
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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 3310 / 3330/3410 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, e.g. Service Bulletins.
For that reason it does not contain any circuit descriptions or schematics.
All measurements are made by using following equipment:
Nokia repair SW : WinTesla Version 6.46/15.04.2002
DLL version : 311.15.00 / 26.06.2002
Nokia module jig : MJS -19
Digital multimeter : Fluke 73
Oscilloscope : Hitachi V-1565; Fluke PM 3380A/B
Spectrum Analyzer : Advantest R3161 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 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) in error.
Please send to: Nokia GmbH
SCCE Training Group
Customer Care E&A
Meesmannstr.103
D-44807 Bochum / Germany
Email: [email protected]
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(44)
NHM—2/5/6 Repairhints
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©NMP 2002 Checked by:
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Contents
PREFACE 2
General 2
Introduction 3
List of flowcharts 6
List of figures 6
Important Information 7
AM Suppression tuning 8
CHAPTER 1 HW –CHANGES 11
Difficulties when removing B-Cover (SB13 / NHM-5) 11
Intermittent switch-off problem (SB 28 / NHM-5, SB 7 / NHM 6) 11
Correct component replacement in UB4_ 10 or later of NHM-5(SB053) and NHM-6 (SB31) 12
HW Change description Overview of NHM-2/6 13
CHAPTER 2 CHANGING OF D301 14
Step by step description of changing the FLASH/EEPROM –combination D301 14-16
CHAPTER 3 PHONE DOES NOT SWITCH ON 17-19
CHAPTER 4 FLASH UPDATE NOT POSSIBLE 20
Failure message ”MCU boot failure,serial clock-/data line failure” 21
Failure message ”Algorithm code fail / alias ID missing”21
Failure message ”External RAM failure”21
CHAPTER 5 PHONE SWITCHES OFF INTERMITTENT 22
CHAPTER 6 LOW STANDBY / OPERATION MODE TIME 23
Low standby / operation time 23-24
Off state current fail 24
Sleep mode current fail 24
CHAPTER 7 NOT CHARGING 25
Not charging 26
Nothing happens if charger is connected 26
Display message “Not charging” 26
Display message “Reconnect charger”

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CHAPTER 8 CONTACT SERVICE 27
MCU ROM Checksum failed 27
CCONT Interface failed 27
COBBA parallel/serial failed 27
DSP Alive test failed 27
EEPROM sec/tune checksum failed 27
CHAPTER 9 SIMCARD FAULTS 28
Display message “Insert SIMcard” 29
Display message ”SIMcard not accepted” 29
CHAPTER 10 INTERNAL AUDIO FAULTS 30
Speaker faulty 30
Microphone does not work 30
CHAPTER 11 USER INTERFACE FAULTY 31
Display failure 31
Keypad malfunction 31
Backlight failure 31
Vibra failure 32
Buzzer failure 32
Clock time problems 32
CHAPTER 12 NO SERVICE 33
No or too low TX power GSM 900 33-37
No or too low TX power GSM 1800 37
Faulty spectrum 38
No RX-calibration GSM 900 possible 39-42
No RX-calibration GSM 1800 possible 42
Poor service or no network coverage, C508 faulty 43
CHAPTER 13 CHANGE HISTORY 44

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List of flowcharts
Flowchart 3-1Phone does not switch on Chapter 3 17
Flowchart 4-1Flash update not possible Chapter 4 20
Flowchart 6-1Low standby/Operation mode time Chapter 6 23
Flowchart 7-1Not charging Chapter 7 25
Flowchart 9-1SIMcard faults Chapter 9 28
Flowchart 10-1Internal audio faults Chapter 10 30
Flowchart 12-1No service (no TX) Chapter 12 33
Flowchart 12-2No Rx calibration GSM 900 possible “ 39
List of figures
Figure 1-1D-Cover NHM-5 (the pin who is cut) Chapter 1 11
Figure 2-1 “Phone Identity Information” window in WinTesla Chapter 2 14
Figure 2-2“Flash Menu Selection” window in WinTesla “ 14
Figure 2-3“Flash Phone” window in WinTesla “ 15
Figure 2-4Message after proceed “Flash Phone” window in WinTesla “ 15
Figure 2-5“Default Factory values” window in WinTesla “ 16
Figure 2-6Message after set ”Full Factory” on “Default Factory values” window “ 16
Figure 2-7“Production Data Edit” window in WinTesla “ 16
Figure 3-132.768 kHz at C220 Chapter 3 18
Figure 3-213 MHz reference clock at C303 “ 18
Figure 3-326 MHz reference clock at G502 “ 19
Figure 3-413 MHz system clock at C559 “ 19
Figure 8-1COBBACLK at J317 Chapter 8 27
Figure 9-1SIMcard signal (5 Vpp) at the SIMcard pogo pins of the service jig Chapter 9 29
Figure 10-1Bended connector on display assy Chapter 10 31
Figure 11-1Vibra signal at N400 pin 16 Chapter 11 32
Figure 12-126 MHz at C546 Chapter 12 34
Figure 12-2TXIQ-signals at R541/548 “ 34
Figure 12-313 MHz COBBACLK at J317 “ 34
Figure 12-4897.6 MHz TX-spectrum at L514 “ 35
Figure 12-5SCLK at R301 “ 35
Figure 12-6SENA at R301 “ 35
Figure 12-7SDATA at R300 “ 35
Figure 12-8TXC at C542 “ 36
Figure 12-9TXP at J503 “ 36
Figure 12-10 HAGARReset at C540 “ 36
Figure 12-11 SHF-signal (3590.4 MHz) at T502 pin 3/4 “ 36
Figure 12-12 Vapc at C565 “ 37
Figure 12-13 Normal spectrum (1747.8 MHz) “ 38
Figure 12-14 Spectrum with broken solderings under CCONT (1747.8 MHz) “ 38
Figure 12-15 Spectrum of faulty COBBA (1747.8 MHz) “ 38
Figure 12-16 Spectrum of faulty oscillator G500 “ 38
Figure 12-17 RX-signal 942.6 MHz at C545 “ 40
Figure 12-18 RX-signal 942.6 MHz at C534 “ 40
Figure 12-19 1.1 Vpp at base of V501 “ 40
Figure 12-20 2.6 Vpp at collector of V501 “ 40
Figure 12-21 67.708 kHz at pads of C512 “ 41
Figure 12-22 SHF-signal (3770.4 MHz) at T502 “ 41
Figure 12-23 67.708 kHz at R500 “ 41
Figure 12-24 67.708 kHz at R504 “ 42
Figure 12-25 “AFC information” windows in WinTesla 43
Figure 12-26 67.708 kHz at R504 with faulty C508 in comparison to “Figure 12-23” 43
Figure 12-27 67.708 kHz at R500 with faulty C508 in comparison to “Figure 12-24” 43

CONFIDENTIAL 7(44)
NHM—2/5/6 Repairhints
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©NMP 2002 Checked by:
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IMPORTANT INFORMATION
Changing of EEPROM D301
If it is necessary to change D301, take a look at chapter 2 on page 14 “Changing of D301” how to proceed.
Furthermore never change D301 if you have no permission to rewrite IMEI –otherwise all phone data will be lost!
To avoid further problems send the phone to a higher-level NOKIA Service Center.
Changing of COBBA N800
If it is necessary to change COBBA, you have to rewrite IMEI & SIMlock data and flash the phone!
Also RX/TX-values must be realigned.
Changing of CCONT N700
If it is necessary to change CCONT, you have to realign A/D values.
Changing components in RF-part
If it is necessary to change any main component in RF-part (IC´s, oscillators, filters…) you have to realign all RX/TX values.
In case of problems to tune RF-values of GSM1800 band, check in WinTesla Configure/Options if automatic rescan function
is activated for the phone. If selected, the band will change to GSM1800 but due to the rescan the phone changes back to
GSM900. To solve the problem deactivate the automatic rescan function if necessary.

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AM-suppression tuning in NHM-2/5/6
Due to a software failure in the latest NHM-2/5/6 DLL 311.15.00 it is necessary to run AM-suppression tuning in a special way,
as described in the following pages. In case you do not use this procedure the AM-suppression tuning values will not be saved and
WinTesla will not recognize the new values. So no warning message will be performed.
In the first step you have to activate AM-suppression tuning as usual (Tuning/AM Suppression…):
Click on the “Measure” button to get the next window, which shows the signal values you have to adjust, then click “OK”.
After correct AM-suppression tuning in EGSM900 (RSSI-level shown in the measurement window is < -86dBm) you get the
message to proceed the tuning in PCN. At this point do not press “YES” as, differently from the message box, the tuning values
will not be saved by choosing this button.
Click the button “Cancel” so that only the window shown on next page is performed on the screen.

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To save the tuning values you have to click the “Save” button in this window.
Afterwards start the tuning procedure again by pressing the “Measure” button, because tuning in PCN yet must be done.
Next appearing window is shown below. Press “OK” (it is not necessary to choose correct signal values).
After having done AM-suppression tuning in EGSM900 a second time, press the “Yes” button.
As effect the tuning values of EGSM900 will not be stored (but these tuning values have been stored before).
You will be shown the message box as on next page so that you can continue tuning in PCN band.

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Set generator to the signal values mentioned in the control box. Then press the “OK” button.
To save the tuning values of AM-suppression in PCN band, do not use the “Yes” button. As in the case of EGSM900 choose the
“Cancel” button and click the “Save” button in the remaining window. RSSI-level in PCN tuning must be < -90dBm!
Now AM-suppression has been performed in both EGSM and PCN and you can leave the tuning by choosing “Close”.

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CHAPTER 1: HW-CHANGES
Difficulties when removing B-Cover (SB13 / NHM-5)
Cut away the guiding pin of the D-Cover (see Figure 1-1), if customer critisizes bad removal of B-Cover.
After this procedure it is necessary to assemble the phone with a torque screwdriver prepared for 30Ncm!
Figure 1-1
Intermittent switch -off problem (SB17 / NHM-2, SB 28 & 55 / NHM-5, SB 7 / NHM-6)
The change of R301 from 2x 2.2 k?to 2x100 ?because of “Intermittet switches off” not needed anymore since HW 0813 on
UP4IV, 0814 on UD4, 0815 on UG4 (NHM-5; SB 55), HW 0817 on UW4, 0818 on UW4II and 0819 on UX4 (NHM-6; SB 32) as in
the new HW version this change is already done. The change of R301 should be a solution in earlier HW versions only.
All NHM-2 HW versions have the correct value implemented already in production (SB –017).
“Intermittet switches off” could be caused also by old ST flash, i.e. from before Week 02/2001.
Therefore it is recommended to use newer ST Flash IC.
Note that SB 28 & 55 replaces the SB 12. Do not use this procedure anymore!

CONFIDENTIAL 12 (44)
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Correct component replacement in UB4_ 10 or later of NHM-5 (SB053) and NHM-6 (SB31)
If changing the power amplifier (N502) & antenna switches (Z502) is necessary, it is recommended to replace with the same type
as the removed one.
The information in tables “PA vendor depent RF discrete component mount” and “Ant.sw./diplexer depent RF discrete components
mounts” in NHM-5/6 Service Manual must be followed if there is a really essential reason to use different type of power
amplifier or antenna switch as replacement
Only the following combinations of power amplifier and antenna are allowed for NHM-5/6:
Note:
-After changing Power Amplifier, TX Power Tuning has to be carrying out.
-After changing Antenna Switch, Tx Power Tuning and RX Calibrations have to be carrying out.
After the Power Amplifier replacements, additional it should be checked in which constellation R311 and R312 were assembled
(marked “X”).
If necessary, adjust the resistors in the corresponding order to the type of PA.
Use for it the table below (PA vendor detection) as reference. (NHM-5; SB 25)
This is important because of the differences between the three power amplifier versions in use.
In UP4 Hitachi PA has been used while UD4 includes Philips PA and UG4 uses RFMD power amplifier.
Last mentioned is available as spare part meanwhile.
For PCB version up to Version 09 PCB version 10 and later
PA vendor detection
PA vendor Part. No. R312 (PA_vendor2) R311 (PA_vendor1)
RFMD 435X231 Mounted
Phillips 435X194 Mounted
Hitachi 4350259
NHM-5
Power Amplifier Antenna Switch
Hitachi (4350259) Murata (4550131)
Phillips (4350269) Matushita (4550201)
RFMD (4350277)
Matushita (4550201)
NHM-6
Power Amplifier Antenna Switch
Hitachi (4350259) Murata (4550131)
Phillips (4350269)Murata (4550131)
PA vendor detection
PA vendor Part. No. R312 (PA_vendor2) R311 (PA_vendor1)
RFMD 435X231 Mounted Mounted
Phillips 435X194 Mounted
Hitachi 4350259 Mounted

CONFIDENTIAL 13 (44)
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HW Change description Overview of NHM-2/6
GSM TX Out match New MAD2WD1-Hagar
Hagar GSM1800 Output
Part list PCB version Hitachi PA Philips PA RFMD PA Antenna switch Matsushita Antenna switch MURATA VCO 4.0GHz FDK VCO 4.0GHz Matsushita VCTCXO NDK VCTCXO Toyocom TX SAW filter Epcos (Note 3) TX SAW filter Panasonic (Note 3) Cobba TI A12 (Note 4) (UW4 & UW4II)
SCLK)
Resistor'
s
UB4_11 PCB
match
(UX4)
Hagar v5 Cobba ST optical shrink (Note 4) UB4_12 PCB Cobba TI A07 (Note 4) HW id -App. & Fixed
UW4 UB4_10 XXXXXX08.06
UW4 UB4_10 XXXXXXX08.17
UW4 UB4_11 XXXXXXXX09.03
UW4 UB4_11 XXXXXXXXX09.15
UW4 UB4_11 XXXXXXXXXX09.23
UW4 UB4_12 XXXXXXXXXX10.03
UW4 UB4_12 XXXXXXXXXXXX10.24
UX4 UB4_10
XXXXX08.07
UX4 UB4_10
XXXXXX08.11
UX4UB4_10
XXXXXXX08.19
UX4 UB4_10
XXXXXXXX08.23
UX4 UB4_11
XXXXXXXX09.05
UX4 UB4_11
XXXXXXXXX09.07
UX4 UB4_11
XXXXXXXXXX09.25
UX4 UB4_12
XXXXXXXXXX10.05
UX4 UB4_12
XXXXXXXXXXXX10.26
UW4II UB4_10 XXXXXX08.09
UW4II UB4_10 XXXXXXX08.18
UW4II UB4_10 XXXXXXX08.21
UW4II UB4_11 XXXXXXXX09.04
UW4II UB4_11 XXXXXXXX09.09
UW4II UB4_11 XXXXXXXXX09.10
UW4IIUB4_11 XXXXXXXXX09.11
UW4II UB4_11 XXXXXXXXXX09.24
UW4II UB4_12 XXXXXXXXXX10.04
UW4II UB4_12 XXXXXXXXX10.10
UW4II UB4_12 XXXXXXXXXXXX10.25
UW5 UB4_12 XXXXXXXXXX10.07
UW5 UB4_12 XXXXXXXXXX10.11
UW5 UB4_12 XXXXXXXXXXXX10.28
UW5 UB4_12 XXXXXXXXXXXX10.35

CONFIDENTIAL 14 (44)
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CHAPTER 2: CHANGING OF D301
This chapter describes step by step how to change FLASH/EEPROM-combination D301 in NHM-2/5/6 phones:
If you want to change D301 the first you always have to do is a backup of the phone identity information.
Therefore use WinTesla. Under “View” open the window “Phone Information”:
Figure 2-1
If you have no possibility to save this data (e.g. phone does not switch on because of defect D301), it is necessary to give the
phone a new identity!
Having saved the phone identity information, you can now remove D301 and resolder the spare part –always use approved µBGA
rework machine for changing any µBGA!
Because of the empty Flash the phone will not switch on, after changing D301. So the next action is to make a SW-update.
Start WinTesla and choose Product / Open / NHM-5and press ok. Now you will receive the following message:
Figure 2-2
If you select Yes, WinTesla will start and you can choose Dealer / Flash Phone, and the window shown on the next page
appeares:

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Figure 2-3
Now by pressing on the squares with the three dots you have to choose a MCU Image file and PPM file for your phone.
At this point it is not necessary to choose the right PPM file, because this SW-update is used only to make it possible to power
the phone on.
After selecting the two files you have to press the Flash-button to start the SW-update. Next message will be the following:
Figure 2-4
Select Yes and the SW-update will start. If your phone has no fault and the new FLASH/EEPROM was well soldered, you will get
order to Restore Default User Settings –press ok. After that you will get message, that flashing completed:press ok.
Now close the Flash Phone window by pushing the Close button.

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As the next step open Software / Set Factory Values, choose Full factory and press Set:
Figure 2-5
You receive following message:
Figure 2-6
After pressing Yes you will get order to Restore Default User Settings –press ok. Now you can close the window shown on the
top of this page by pressing Cancel.
In the next step you have to open Software / Production Data Edit:
Figure 2-7
Rewrite product code and HW version out of your saved phone data into this window and press Save.
After this procedure you have to write back IMEI / SIMlock data and run SW-update once more. This time you have to choose
the correct flash file matching to your product code! Close the windows, which ask you to save user data to file by pressing No
and Restore Default User Settings by pressing ok after flashing.
Remember to retune RX/TX values and run energy management calibration, as all tuning data is lost after changing D301!

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CHAPTER 3: PHONE DOES NOT SWITCH ON
Flowchart 3-1
Disable watchdog or press
powerswitch before each
measurement
Phone does not
switch on
Check X203 if bent
or soiled, also
check L513, L201
Check VB 3.6 VDC at
C227/228
Check
32.768 kHz at C220,
3 Vpp squarewave
Check/change B200,
R211/212/214, C229/230
or change N201
Check if
PWRONX at R402 drops
to 0 V during pressing
powerkey
Check/change
S419, R402, R224,
change N201 if necessary
Check
VBB 2.8 VDC at
C209/211
Check VXO 2.8 VDC
at C243
Check
VCORE 1.7 VDC at both
sides of L200, change if
necessary.
Check 13 MHz RFC
at C303
(500 mVpp)
Check
PURX 2.8 VDC at
R308 after pressing
powerkey
Check resistance of line to
GND (~90 k). If line ok,
change N201
Check resistance of line to
GND (~45 k). If line ok,
change N201
Check resistance of line to
GND (~180 k). If line ok,
change N201
Check values around
G502, N500, V502 Change N201
Try to flash the
phone
Continue with section
"FLASH UPDATE NOT
POSSIBLE"
Phone is ok
OK
OK
OK
OK OK OK
nOK
nOK
nOK
nOK
nOK
nOK
nOK nOK nOK
Check if current
consumption is higher than
500 mA
Continue with section
"LOW STANDBY/OPERATION
MODE TIME"
yes
no
OK
OK
OK

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Phone does not switch on
The first thing you should do in this case is to check the current consumption of the phone:
Off-state current normally varies between 0.1 mA and 0.6 mA, sleep mode current varies between 0.6 mA and 4 mA while
call mode current varies between 100 mA (lowest TX-power level, lights off) and 550 mA (highest TX-power level, lights on).
In case the current consumption increases to more than 0.5 A immediately after connecting the phone to the service-battery or
immediately after pressing the power button continue with chapter “Low standby/operation mode time”.
If current consumption is lower than 0.5 A, check VB 3.6 VDC at C227/228.
If voltage is not ok, check if contact pads for battery connector on PCB are clean. Also check solderings
and resistance of L513 and L201.
If VB 3.6 VDC at C227/228 is ok, check whether voltage at R402 drops from 4 VDC to 0 V while pressing the power switch.
If voltage at R402 is 4 VDC but does not low down to 0 V when power switch is pressed, usually the switch S419
itself is defect.
In case that no or too low voltage is measurable at R402, check POWERONX-line for interruption.
Therefore check solderings and resistance of R402 and R224. It also can be necessary to change CCONT N201
Check whether 32.768 kHz oscillator is working:
Figure 3-1
Amplitude of 32.768 kHz at C220 is 3 Vpp. If signal is not measurable check periphery of B200 as
R211/212/214 and C229/230,.Change crystal B200 if necessary. If this does not solve the problem
change CCONT N201. Remember to run energy management calibration after changing CCONT N201!
If all the above mentioned works the output voltage lines of CCONT must rise to their supposed values.
Check VBB 2.8 VDC at C209/211, VXO 2.8 VDC at C243 and VCORE 1.7 VDC at both sides of L200.
If only one of these voltages is not measurable, check lines for shorts to ground.
Resistance of VBB-line to GND normally is around 90 k?, resistance of VXO-line is ~45 k?while resistance of
VCORE-line is ~180 k?. Check parts in corresponding line if resistance is too low.
In case that one of the mentioned voltages is not measurable even tough resistance of the line is ok it is
necessary to change the CCONT. Remember to run energy management calibration after changing CCONT N201!
If both VBB, VXO and VCORE are ok, check 13 MHz reference-clock at C303:
Figure 3-2

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NHM—2/5/6 Repairhints
Customer Care Europe, Middle East & Africa 3410 Version 4.0 Approved
SCCE Training Group Date 20.11.2002
©NMP 2002 Checked by:
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In case the signal shown in figure 3-2 is not measurable, check voltages at reference oscillator G502:
Check VCC 2.6 VDC at G502 pin 2 and check control voltage (AFC) at pin 1 which normally is 1.2 VDC.
Note that control voltage may vary between 0.1 VDC and 2.3 VDC. Even without control voltage the oscillator
must be able to work on a frequency around 26 MHz as shown in the Figure 3-3.
If this is not the case you have to change G502.
Figure 3-3
26 MHz reference clock at the output
of G502: Amplitude is around –10 dBm.
If 26 MHz clock at G502 “out” is ok but no signal is measurable at C303, check 13 MHz system clock at C559:
Figure 3-4
Amplitude of 13 MHz system clock at
C559 is around –18 dBm.
If the signal shown above is not measurable, check VTCXO 2.7 VDC at C506/518. If both VTCXO and 26 MHz
reference clock are ok but 13 MHz system clock at C559 is not measurable, you have to change Hagar N500.
Remember to realign RX/TX-values after changing Hagar N500!
In case that 13 MHz system clock at C559 is ok but signal is not measurable at C303, check function of V502:
Check if voltage at base is 0.6 VDC and voltage at collector is 1.15 VDC. Amplitude of 13 MHz system clock
at base should be –25 dBm while amplitude at collector should be –8 dBm. Change V502 if necessary.
If 13 MHz system clock at C303 is ok check if PURX at R308 rises to 2.8 VDC after pressing the power switch.
If PURX-line keeps low, check line for shorts to ground. Resistance normally is around 5 M?.
In case that resistance is ok you have to change CCONT N201. Remember to run energy management
calibration after changing CCONT!
If also PURX is ok, try to flash the phone. In case of any failure message appearing while running SW-update, remember the
failure message and continue with chapter “Flash update not possible”.

CONFIDENTIAL 20 (44)
NHM—2/5/6 Repairhints
Customer Care Europe, Middle East & Africa 3410 Version 4.0 Approved
SCCE Training Group Date 20.11.2002
©NMP 2002 Checked by:
Customer Care E&A
Approved by:
SCCE Training Group
CHAPTER 4: FLASH UPDATE NOT POSSIBLE
Flowchart 4-1
Flash update not possible
Prommer fault code:
1. MCU boot failure
2. Serial clock line failure
3. Serial data line failure
Connect "watchdog disable"
R224 to GND if phone does
not stay on
Check M/F-bus lines (X201,
pad 1,2,4) for shorts to GND,
also check R217,
R302/304/307, C232 and
V204
If update is still not possible,
swap the phone, because MAD
or PCB should be the reason
Algorithm code fail,
alias ID missing External RAM failure
Change SRAM D302, try to
update again
Update FPS4-box with
latest flash device list,
try to update again
Change Flash D301, try
to update again. If not
ok, MAD or PCB faulty
Continue with section
"Phone does not
switch on"
MAD is faulty in all
probability, swap the
phone.
Change CCONT N201
Check values around
G502, N500, V502
no
yes
no
yes
nOK nOK
yes
OK
Check VBB
2.8 VDC at C209/211,
VXO 2.8 VDC at C243,
VCORE 1.7 VDC at L200
Check SLEEPX 2.8 VDC
at J308
Check PURX 2.8 VDC at R308
Check 13 MHz RFC
at C303, 500 mVpp
nOK
nOK
nOK
nOK
OK
OK
OK
OK