CONFIDENTIAL 1 (35)
NSM-2/3
Service & Analysis Center Europe Repairhints Version 2.0 Approved
SACE CC Training Group 2000-10-16
Repair-Hints
8210/8850
NSM-2/3
HD 914/916
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NSM-2/3
Service & Analysis Center Europe Repairhints Version 2.0 Approved
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GENERAL
-How to use this document
Put the QUICK REPAIR layouts 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 measurepoints.
-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.
-Underfills, broken balls, µBGA
It is not possible to change underfilled components. The trial will damage PCB surely.
All replaceable µBGA-components must be renewed after removing.
Check soldering points, remove oxidated solderings (broken balls) carefully by enclosing few new solder
before placing new components.
µBGA must be soldered only with µBGA-rework machines (e.g. Zevac / OK International).
Use only recommended Fluxtype and an appropriate amount of it.
Clean very careful the PCB after every rework and take great pains over the keyboard area.
Don´t make any loose wiring connections anywhere.
If it is necessary to change any item located under the metal shields, remove the shield
first, don´t cut partially or bend it.
-Realign after repair
Characteristics of spare 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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Contents
GENERAL 2
INTRODUCTION 4
PHONE DOES NOT SWITCH ON 5
LOW STANDBY TIME 9
CONTACT SERVICE 11
PHONE SWITCHES OFF 12
NOT CHARGING 13
SIMCARD FAULTS 15
NO SERVICE 18
FREQUENCY LIST 27
INTERNAL AUDIO 28
USER INTERFACE 30
CLOCK TIME PROBLEMS 31
SIMLOCKS 32
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INTRODUCTION
IMPORTANT:
This document is intended for use by authorised NOKIA service centers only.
The purpose of this document is to provide some further service information for NOKIA 8210/8850 phones.
It contains a lot of collected tips and hints, to find failures and repair solutions easily.
It will also 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 doesn't contain any circuit descriptions or schematics.
All measurements are made using following equipment:
Nokia repair SW : WinTesla Version 6.43
DLL version : NSM2 03.11.00- 25.05.2000
Nokia Module Jig : MJS 9
Digital multimeter : Fluke 73
Oscilloscope : Hitachi V-1565; Fluke PM 3380A/B
Spectrum Analyzer : Advantest R3361C with an analogue probe
RF-Generator / : Rohde & Schwarz CMD 53
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 & Analysis Center Europe
Meesmannstr.103
D-44807 Bochum / Germany
Email: training.sace@nokia.com
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Service & Analysis Center Europe Repairhints Version 2.0 Approved
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PHONE DOES NOT SWITCH ON
Check current consumption
OFFSTATE: 0-1mA SLEEPMODE: 1-4mA
Call mode: 130-400mA. If too high continue
with section "low standby/operation mode
time"
Check Vb~4V at C129
OK
Check if PWRONX at S330 drops to 0V
during pressing the powerswitch
OK
Check 32,768kHz at J228 3,2Vpp
squarewave
OK
Check Vbb 2,8V at C107
OK
Check Vxo 2,8V at C152
OK
Check Vref 1,5V at C106
nOK
nOK
nOK
nOK
nOK
nOK
Check X101 if bend or soiled, also
check L103
Check/change S330,R118
Check/change B100, R100/102/154,
C101/102/113
Check resistance of line to GND,
value should ~60k, if line ok, change
Check resistance of line to GND,
value should ~45k, if line ok, change
Check resistance of line to GND,
value should ~50k, if line ok, change
N100
N100
N100
nOK
Change N100
Check PURX 2.8V at J227 after pressing
Check 13MHz REFCLK at C213,~800mVpp
© 2000 NMP
OK
Check SLEEPX 2,8V at J226
OK
powerswitch
OK
OK
Try to flash the phone
nOK
nOK
nOK
nOK
MAD is faulty in all probability.
Swap, because MAD is not
changeable
Change N100
Check Values around G830, N505
Continue with section "Flash update
and V800
not possible
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Battery connector
Check if bent or soiled.
Clean pads of connector on PCB if soiled.
Power on/off switch S330 faulty
Check that PWRONX at S330 decreases to 0V during pressing the powerswitch.
B100
Check voltage at B100, both 1.6V DC.
Check 32.768kHz sinewave at C102, 700mVpp.
Check parts around B100- like R100, R102, R154, C101, C102.
Check sleepclock 32.768kHz squarewave at J228, 3.2Vpp.
G830 Reference oscillator faulty
Check Vcc 2.7V at C831 and Vcon (varies between 0.3V and 2.3V) at C832.
Check 26MHz Clk-frequency at C830, 900mVpp.
Check 13MHz Clk-frequency at C829, 300mVpp. If not ok, check values around N505.
Check 13MHz Clk-frequency at C213, 800mVpp. If not ok, check values around V800.
N100 CCONT faulty
Check Vb 3.6V at C129.
Check that PWRONX decreases to 0V at S330 when powerswitch is pressed. Also check R118.
Check 32.768kHz squarewave 3.2Vpp at J228.
Check 13MHz Clk-frequency at C213.
Check Vbb 2.8V at C107.
Check Vxo 2.8V at C152.
Check Vref 1.5V at C106.
Check SLEEPX 2.8V at J226.
Check PURX 2.8V at J227.
Probably broken solderings under CCONT N100. Replace CCONT with µBGA rework machine.
Note that it is necessary to run energy management calibration after changing CCONT!
D200 MAD faulty.
Check 32.768kHz squarewave at J228.
Check 13MHz Clk-frequency at C213.
Check Vbb 2.8V at C201.
Check SLEEPX 2.8V at J226.
Check PURX 2.8V at J227.
MAD is probably faulty, swap the unit, because MAD is not changeable.
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FLASH UPDATE NOT POSSIBLE
Check fault code
from prommer
MCU boot failure,
serial clock line failure, serial
data line failure
YES
Connect "watchdog disable"
R118 to GND
OK
Check Vbb 2.8V at C107, Vxo
2.8V at C152
OK
Check SLEEPX 2.8V
at J226
OK
nOK
nOK
NO
Algorithm code fail,
alias ID missing
Update FPS4 box
with latest flash
device list, try to
update again.
Continue with
section "phone does
not switch on"
MAD faulty
nOK
NO
External RAM failure
YESYES
Check values at D200, if OK,Swap, Combo Memory should
be the reason
© 2000 NMP
Check PURX 2.8V at
J227
OK
Check 13MHz RFCLK
at C213, ~800mVpp
OK
Check Mbus/Fbus lines
(J101-J103) for shorts to
GND. Also check
R109/201/203/215
OK
If error persists, PCB
or MAD should be
the reason.
nOK
nOK
Change CCONT
(N100)
Check values around
G830, N505, V800
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Mbus / Fbus lines faulty
Check that there´s no short at J101- J103 to GND, resistance of lines should be between 60kOhm and 220kOhm.
ComboMemory
If “algorithm code / alias ID missing from prommer box” appears while flashing, make sure that your FPS4 box is updated
with the latest flash device list.
Contact service
If “contact service” appears while flashing, change C205 from 1µF to 2.2µF (Code 2610203) to stabilize flash programming
voltage.
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Low standby / operation mode time
Check power
consumption of
phone
Off state 0-1mA
OK
Sleepmode 1-4mA
OK
Check charging circuit, run
energy management calibration
nOK nOK
Lift L103
OK
Check capacitors in Vb line
or change
N100/101/220/310/401 if
necessary
nOK
Check resistance of output
voltage lines of CCONT to GND
nOK
OK
Change CCONT
nOK
Continue with section "not
charging"
Check capacitors
C702-704, C754/755
nOK
Change N702
Check components in
corresponding lines
Please note that standby time also depends
(Paging-Repeat-Period), signal strengh
(min.-98dBm), location updates and not at
© 2000 NMP
OK
Calibrate RX/TX values of the
phone
OK
on network side, like PRP
least users handling of phone.
nOK
Continue with section "RX/TX
faults"
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Check the current consumption in different operation modes:
Funktion mode Minimum current in mA Maximum current in mA
Off state 0 1
Sleep mode 1 4
Call mode GSM 900 140 400
Call mode GSM 1800 130 370
Off state current fail
Lift L103 to define the fault if off state current is not ok.
If current is still not ok, lift C702/703/704 and C754/755 one by one.
If fault remains, change power amplifier N702, which is the reason in most cases.
If current is ok after removing L103, resolder it. After that you have to check capacitors in Vb line
(C100,C105,C129,C142,C165…).
If fault remains, change N100, N101, N220, N310 or N401. In most cases CCONT (N100) is responsible for this fault.
Sleep mode current fail
Check resistance of every output voltage line of CCONT (N100) to GND. The values should be higher than 10kOhm,
except Vsyn1 ( 3kOhm ) and Vsyn2 ( 0.9kOhm ).
If resistance of any line is not ok, check/change parts of this line.
If resistance of all lines is ok, change CCONT (N100).
If the standby/operation mode time is still not ok, check the charging circuit and run the energy management calibration.
It can also be necessary to calibrate the RX/TX values of the phone.
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CONTACT SERVICE
This fault means that the phone software is able to run and thus the watchdog of CCONT (N100) can be served.
Selftest functions run when power is switched on and software is executed from ComboMemory.
If any selftest fails, a “Contact Service“ text is shown on LCD.
Possible failures:
MCU ROM Checksum failed
Try to flash the phone. If not ok after flashing, probably ComboMemory is faulty, which is not changeable.
CCONT Interface failed
Probably broken solderings under CCONT (N100).
If CCONT is not underfilled, replace it with µBGA rework machine.
If not ok after reworking the CCONT, probably MAD or PCB faulty.
Note that you have to run energy management calibration after changing CCONT!
COBBA parallel/serial failed
Check Vbb 2.8V at C201 and VCOBBA 2.8V at C248.
Check COBBAClk at J252.
Probably broken solderings under COBBA (N250) – replace COBBA. If fault remains, MAD or PCB faulty.
Note: IMEIdata and SIMlock must be rewritten after COBBA- change, also retune RF-values.
DSP alive test failed.
In most of all DSP alive selftest failures MAD is faulty, which is not changeable.
Eeprom tune checksum failed
Use WinTesla to check if phonedata like Imei, product-code or PSN are corrupted.
If phone data is ok, try to reset the phone. If phone data is not ok or fault remains after reset, ComboMemory is faulty
in all probability.
RTC Battery failed
First try to charge RTC battery by switching on the phone for 10 to 15 minutes.
If fault remains, check contact springs of battery, bend them if nessecary.
(Also see NSM-2 Service Bulletin 20).
In some cases it can be necessary to change RTC battery and/or CCONT (N100).
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PHONE INTERMITTENT SWITCHES OFF/ DOESN’T SWITCH ON
Check mechanical appearance of connector X101.
Check that pads of X101 on PCB are clean.
Check amplitude of 32.768kHz at J228, 3.2Vpp squarewave, probably broken solderings under CCONT N100.
Remove CCONT if not underfilled and replace it with µBGA rework machine.
The same problem may cause N505, because the reference oscillator G830 (26MHz) is divided to 13MHz
system clock by HAGAR N505. If broken solderings exist under HAGAR, rework as described above.
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Not charging
Nothing happens if charger is
connected
check voltage level at R103>0,4V if
charger is connected
OK
Change N101/100
"not charging" appears on LCD
run energy management calibration
OK
nOK
Check/change X110,F101,
V100, R103/104
Try to charge after
calibration
Failure messages
Battery temperature failed
Battery size failed
Battery voltage failed
charge current failed
charge voltage failed
Check X101,
R120/122, change
N100
Check X101,
R120/122, change
N100
Change N100
Check R131, change
N100/101
Check Vcharge at voltage
divider R103/104
nOK
Check X110,V100, F101,
L104, change N101
Change N100
OK
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X110 DC/HS connector, X101 battery connector
Check mechanical appearance of connectors, make sure that pads for connectors on PCB are clean.
F101 faulty
Check resistance of F101 (0 Ohm).
Vcharge line shorted to GND.
Check resistance of Vcharge line at F101 to GND (50 kOhm).
If resistance is not ok, remove L104 and check again.If resistance is still not ok, V100 faulty in all probability.
If resistance is ok now, C103/C114 or N101 should be the reason.
N100 faulty
Change CCONT (N100) if any A/D value is out of limit while DC voltage is ok.
If DC voltages are not ok, check corresponding voltage dividers and battery connector X101 and run energy management
calibration.
Energy management calibration
Run calibration if charging stops too early, if message “not charging” appears on LCD or any part in the charging
circuit has been replaced.
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SIMCARD FAULTS
"Insert SIMcard"
Check X302 if bend or soiled,
check contact pads on PCB
OK
Check Signals at V104:
Pin1 SIMCLK
pin3 VSIM
pin4 SIMData
pin5 SIMRST
"SIMcard not accepted" appears
on LCD
nOK
nOK
Change X302, clean PCB if
necessary
Check R124/125/128,
resistance of SIMlines to
GND. Change V104, N100
if necessary
nOK
Probably MAD or PCB
faulty
© 2000 NMP
Compare SIMlock data
with listed entries of
respective prod.-code with
WinTesla
nOK
Rewrite SIMlock data with NOKIA SECURITY
PASSWORD or send phone to SACE. If SIMlock is
corrected or inactive, but fault remains, change
COBBA (N250) and rewrite SIMlock
OK
Simlock is OK. If the Msin data field is
closed to a special IMSI number range,
only the operator is allowed to open the
SIMlock. Also see general SB65
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VSIM after switching on the phone without SIMcard. CCONT pulses up VSIM four times, at first the amplitude is 3 Volt, the next
three times 5 Volt.
If the phone is switched on with SIMcard, Vsim stays on level with which SIMcard works, expected that SIMcard is not dirty
or damaged.
Please Note: SIMclock and SIMdata are only present when SIMcard is active, for example if phone registers to network.
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SIMReset is low-active, that means that the SIMcard will be reseted when SIMReset is 0 Volt. This is the case after switching
on the phone ( diagram above ). While Vsim is already high, SIMReset keeps low for a few milliseconds – in this time the card
will be reseted.
X 302 SIMcard Reader
Check if bent or soiled, change if necessary.
Make sure that SIMreader´s pads on PCB are clean and check/add twin rip (NSM-2 only,- see SB 012).
V 104 faulty
Check resistance of SIMlines to GND, value shouldn’t decrease 200kOhm.
Check also R124/125/128, C127/128.
CCONT (N100) faulty
Check SIMClock, SIMData, SIMReset and Vsim.
Probably broken solderings under CCONT (N100). Remove CCONT and replace it with µBGA rework machine.
Run energy management calibration after changing CCONT!
COBBA (N250) faulty
If „SIM card not accepted“ appears on LCD, but SIMlock-settings are ok or no SIMlock is set, it is necessary to change
COBBA (N250).
Note that you have to rewrite SIMlock-data and tune RX/TX-values of the phone after changing the COBBA.
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NO SERVICE
First of all: Calibrate RX/TX values to define the fault.
No or too low TX power GSM 900
Use WinTesla to set phone into following mode: “Initialise/ Local mode/Testing/ RF Controls/ active unit TX, Ch.60”.
Check 26MHz reference oscillator at C830, 700mVpp, frequency deviation < 100Hz.
Check TXI/Q signals at R541/546, refer to signals shown on next pages.
If not ok, check values at COBBA (N250)- see below.
Check 902 MHz at T700 pin 4 and 6. If not ok, check signals at HAGAR (N505)- see below.
Check 902 MHz at N702 pin 8. If not ok, check parts like T700, Z700, Z671 or V801.
Check 902 MHz at L553 pin 1. If not ok, check values at N702.
Check 902 MHz at J600 (Antenna pad). If not ok, check L553 in & out, also check signal at Z670 in & out and TXVGSM
(2,8Vpp squarewave) at R671 (sets Z670 to TX-mode).
COBBA N250 faulty
Check Vbb (2.8V) at C201 and VCOBBA (2.8V) at C248.
Check 13MHz COBBAclk at J252 (see diagram in chapter „Contact Service“).
Probably broken solderings under COBBA (N250). Replace COBBA with µBGA rework machine and retune RX/TX values.
HAGAR N505 faulty
Check voltages at HAGAR :
Vtcxo 2.8V at C550.
Vchp 4.8V at C560
Vsynte 2.8V at C561
VRXrf 2.8V at C557
Vlna 2.8V at C562
Vref 1.35V at C535
Check 26MHz reference oscillator at C830, 700mVpp.
Check TXI/Q signals at R541 and R546.
Check Sdata at J237, Sclk at R205 and Sena at R206 – refer to signals shown on next pages.
Check TXC at C792 (diagram on next page).
Check TXP at pad of R745, 2.8Vpp squarewave/ 217Hz. (R745 is not assembled, you can find the pads of it
between R791 and R541. TXP is measurable at the pad located near to R744).
Check frequency of SHF oscillator – refer to frequencies worksheet.
If all values are ok, but low or even no TX signal is measurable at T700, probably HAGAR has broken solderings or defect.
Replace HAGAR with µBGA rework machine and align RX/TX values.
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26MHz reference oscillator faulty
Check Vcc 2.7V at C831 and Vcon (varies between 0.3V and 2.3V) at C832.
If frequency deviation is higher than +/- 100 Hz, it is necessary to change the oscillator.
Check appearance and pads of R832.(AFC-line).
G800 SHF oscillator faulty
Check frequency of oscillator if possible – refer to frequencies worksheet on page 27. If you have no possibility
to check frequency (~4GHz), check oscillator by measuring Vcc at C804 ( 2.8V) and Vc at C803, which varies between
0.7V and 3.8V, dependent on the used channel. If Vc is ~4.8V, the oscillator doesn’t work in all probability.
The amplitude of TXC depends on the chosen powerlevel. It varies between 0,4Vpp on powerlevel 19
and 1,6Vpp on powerlevel 5.
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N702 power amplifier faulty
Check TX power signal at pin 8 of N702.
Check TXVGSM at pin 1 of N702 (2.8Vpp squarewave/ 217Hz).
Check Vapc at pin 7 of N702 (1- 1.6Vpp depending on powerlevel).
Check Vbatt at pin 3 and 6 of N702.
If all values are ok but still there´s no or too low TX power measurable at L553 pin 1, change N702.
Z670 Diplexer faulty
Check TX power signal at pin 7 of L553.
Check TXVGSM 2.8Vpp squarewave at R671 (near HAGAR).
If all values are ok but still there´s no or too low TX power signal at J600 (Antenna pad), check solderings of Z670.
If it is necessary to change Z670, don’t forget to replace foam on sparepart. (NSM-2 only, see also Service Bulletin 22).
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No or too low TX power GSM 1800:
Use WinTesla to set phone in following mode:
Initialise/Product/Band/PCN/Testing/RF Controls/active unit TX Ch.700.
To find a fault in GSM 1800 TX mode, you can proceed almost the same way as described for GSM 900:
Check 26MHz reference oscillator at C830, 700mVpp, frequency deviation < 100Hz.
Check TXI/Q signals at R541/546. If not ok, check signals at COBBA (N250).
Check 1747.8 MHz at T740 pin 4 and 6. If not ok, check signals at HAGAR (N505).
Check 1747.8 MHz at N702, pin 8. If not ok, check parts like T740, Z671 or V801.
Check 1747.8 MHz at L553 pin 3. If not ok, check values at N702.
Check 1747.8 MHz at J600 ( Antenna pad ). If not ok, check L553 in & out, signal at
Z670 in & out and TXVDCS (2.8Vpp squarewave) at R670 (sets Z670 to TX-mode).
No RX- calibration GSM 900 possible.
Use WinTesla to set phone in following mode: Initialise/Local mode/Testing/RF Controls/active unit RX Ch.60, burst mode.
Set RF- generator to a high RF- level output, e.g. –40dBm.
Check 26MHz reference oscillator at C830, 700mVpp, frequency deviation < 100Hz .
Check 947MHz at Z620 in & out. If not ok, check signals at Z670.
Check 947MHz at C610. If not ok, check values at V904 and V907.
Check 947MHz at both sides of L600. If not ok, check Z600, T600.
Check RXI/Q signal at R530. If not ok, check signals at HAGAR N505.
If signal at R530 is ok but still no RX-calibration possible, check signals at COBBA (N250). Probably MAD faulty.
Diplexer (Z670) faulty
Check 947MHz at J600 ( Antenna pad ).
Check 947MHz at C614. If not ok, check solderings of Z670. If it is necessary to change Z670, don’t forget to replace foam
on sparepart. (NSM-2 only, see also Service Bulletin 22).
HAGAR (N505) faulty.
Check voltages at HAGAR :
Vtcxo 2.8V at C550.
Vsynte 2.8V at C561.
Vlna 2.8V at C562.
Check 26MHz reference oscillator at C830, 700mVpp, frequency deviation < 100Hz.
Check 947MHz at both sides of L600.
Check Sdata at J237, Sclk at R205 and Sena at R206, see diagrams in section TX-faults.
Check 67.708kHz at C522/523 (burst mode, input level –65dBm).
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Service & Analysis Center Europe Repairhints Version 2.0 Approved
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If signal is not ok, check VRXrf 2.8V at C557, check also Vchp 4.8V at C560 and frequency of G800 at C788
(RX Ch.60: 3788MHz) or change HAGAR (N505).
Check 67,708kHz at C520/521 (burst mode, input level –65dBm).
Check 67,708kHz at R510 (burst mode, input level –65dBm).
If signal is not ok at R510, check C510- C513 for shorts to GND, check resistance of R510
( 4 * 100R ) or change HAGAR (N505).
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Service & Analysis Center Europe Repairhints Version 2.0 Approved
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Check 67.708kHz at C530/531 (burst mode, input level –65dBm).
Check 67.708kHz at R530 (burst mode, input level –65dBm).
If signal is not ok at R530, check Vref 1,35V at C535, also check C530-C533 if broken or broken soldered, change HAGAR (N505)
if necessary.
COBBA (N250) faulty
Check Vbb 2,8V at C201 and VCOBBA 2.8V at C248.
Check COBBAclk at J252 (see diagram in chapter “Contact Service“).
Probably broken solderings under COBBA (N250). Remove COBBA, replace it with µBGA rework machine and retune
RX/TX values of the phone.
G830 26MHz reference oscillator faulty.
Check Vcc 2.7V at C831 and Vcon (varies between 0.3V and 2.3V) at C832.
If frequency deviation is higher than +/- 100 Hz, it is necessary to change the oscillator.
G800 SHF oscillator faulty
Check frequency of oscillator if possible – refer to frequencies worksheet (page 27)
If you have no possibility to check frequency, check oscillator by measuring Vcc at C804 (2,8V) and Vc at C803, which varies
between 0.7V and 3.8V.
If Vc is 4.8V, the oscillator doesn’t work in all probability.
© 2000 NMP
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CONFIDENTIAL 25 (35)
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Service & Analysis Center Europe Repairhints Version 2.0 Approved
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No RX - calibration GSM 1800 possible.
Use WinTesla to set phone in following mode: Initialise/Product/Band/PCN
Testing/RF Controls/ active unit RX Ch.700, burst mode.
Set RF- Generator to a high RF- Level output, eg –40dBm.
To find a fault in GSM 1800 RX mode, you can proceed almost the same way as described for GSM 900:
Check 26MHz reference oscillator at C830, 700mVpp,frequency deviation < 100Hz
Check 1842.8MHz at Z620 in & out. If not ok check values at Z670.
Check 1842.8MHz at C640. If not ok check values at V903 and V905.
Check 1842.8MHz at both sides of L631. If not ok check Z600, T630.
Check RXI/Q signal at R530. If not ok check values at HAGAR (N505).
If signal at R530 is ok but still no RX-calibration possible, check signals at COBBA (N250), probably MAD faulty.
Low receiver signal strength indicator
Calibrate RX values of the phone.
Check if antenna pad on PCB is dirty or antenna spring is bend.
Check receivers signal strength indicator with a new antenna.
Bit error too high.
If bit error is too high, probably Z620 faulty. Change filter, retune phone values and check phone in call mode with a simulator.
Oxidized pads under COBBA
Check the module in call mode with a simulator.
Knock carefully around the COBBA with a nonmetallic item.
If errors like RX quality/level or TX power/phase/frequency appear, there are probably oxidized pads under COBBA. Remove COBBA,
tinplate oxidized pads carefully with flux and solder, replace COBBA with µBGA rework machine.
Note that you have to rewrite SIMlock-data and tune RX/TX-values of the phone after changing the COBBA.
© 2000 NMP
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CONFIDENTIAL 26 (35)
NSM-2/3
Service & Analysis Center Europe Repairhints Version 2.0 Approved
SACE CC Training Group 2000-10-16
Faulty TX - spectrum
1) 3)
2) 4)
Pic.1: Normal spectrum
Pic.2: Spectrum with broken solderings under CCONT.
Spectrum turns to picture 1 if CCONT is pushed carefully with a nonmetallic item.
Pic.3: Spectrum of faulty COBBA (RSSI-Alignment not possible, TXI/Q faulty).
Pic.4: Spectrum of faulty oscillator G800, both COBBA or HAGAR can be the reason.
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CONFIDENTIAL 27 (35)
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Service & Analysis Center Europe Repairhints Version 2.0 Approved
SACE CC Training Group 2000-10-16
FREQUENCY LIST
EGSM Channels & Frequencies
Channel TX RX VCO - TX VCO VCO - RX VCO
MHz MHz MHz VOLT MHz VOLT
975 880,2 925,2 3520,8 2,66 3700,8 1,46
976 880,4 925,4 3521,6 3701,6
977 880,6 925,6 3522,4 3702,4
978 880,8 925,8 3523,2 3703,2
979 881 926 3524 3704
980 881,2 926,2 3524,8 3704,8
981 881,4 926,4 3525,6 3705,6
982 881,6 926,6 3526,4 3706,4
983 881,8 926,8 3527,2 3707,2
984 882 927 3528 3708
985 882,2 927,2 3528,8 2,69 3708,8 1,51
986 882,4 927,4 3529,6 3709,6
987 882,6 927,6 3530,4 3710,4
988 882,8 927,8 3531,2 3711,2
989 883 928 3532 3712
990 883,2 928,2 3532,8 3712,8
991 883,4 928,4 3533,6 3713,6
992 883,6 928,6 3534,4 3714,4
993 883,8 928,8 3535,2 3715,2
994 884 929 3536 3716
995 884,2 929,2 3536,8 2,72 3716,8 1,56
996 884,4 929,4 3537,6 3717,6
997 884,6 929,6 3538,4 3718,4
998 884,8 929,8 3539,2 3719,2
999 885 930 3540 3720
1000 885,2 930,2 3540,8 3720,8
1001 885,4 930,4 3541,6 3721,6
1002 885,6 930,6 3542,4 3722,4
1003 885,8 930,8 3543,2 3723,2
1004 886 931 3544 3724
1005 886,2 931,2 3544,8 2,75 3724,8 1,61
1006 886,4 931,4 3545,6 3725,6
1007 886,6 931,6 3546,4 3726,4
1008 886,8 931,8 3547,2 3727,2
1009 887 932 3548 3728
1010 887,2 932,2 3548,8 3728,8
1011 887,4 932,4 3549,6 3729,6
1012 887,6 932,6 3550,4 3730,4
1013 887,8 932,8 3551,2 3731,2
1014 888 933 3552 3732
1015 888,2 933,2 3552,8 2,78 3732,8 1,66
1016 888,4 933,4 3553,6 3733,6
1017 888,6 933,6 3554,4 3734,4
1018 888,8 933,8 3555,2 3735,2
1019 889 934 3556 3736
1020 889,2 934,2 3556,8 3736,8
1021 889,4 934,4 3557,6 3737,6
1022 889,6 934,6 3558,4 3738,4
1023 889,8 934,8 3559,2 2,81 3739,2 1,7
0 890 935 3560 3740
Standard
1 890,2 935,2 3560,8 2,81 3740,8 1,7
60 902 947 3608 3 3788 2,01
124 914,8 959,8 3659,2 3,2 3839,2 2,34
512 1710,2 1805,2 3420,4 2,03 3610,4 0,84
700 1747,8 1842,8 3495,6 2,36 3685,6 1,3
885 1784,8 1879,8 3569,6 2,66 3759,6 1,77
VC at C803 VC at C803
© 2000 NMP
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NSM-2/3
Service & Analysis Center Europe Repairhints Version 2.0 Approved
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INTERNAL AUDIO FAULTS
No audio from speaker
Check resistance of speaker
(30R), change speaker if
bend or soiled
OK
Check connection between
speakerpads on PCB and
C291/292.
nOK
Check L271/272
OK
Check resistance of
speakerlines to GND, both
>1M
OK
Change COBBA N250
Microphone does not work
Check/change mic
Check connection L287 to
C263 (470R)
OK
Change COBBA (N250)
nOK
OK
Check connector X280 (8850
only!)
OK
Check micbias at L287 (2,4V) on
active mic
nOK
Check/change parts around V250
© 2000 NMP
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Speaker faulty
Check resistance of speaker ( 30 Ohm ).
Check mechanical appearance of speaker if audio signal is too quiet or distorted.
Ear N/P disconnection or short circuit to GND.
Check resistance of L271/272 ( 0 Ohm ).
Check resistance of lines to GND ( > 1MOhm ).
Microphone doesn’t work.
Check/change microphone.
Check connector X280 if bent or soiled (8850 only), change if necessary, also see SB-005.
Check microphone voltage at L287 (2,4V) on active micro.
Check connection between L287 and C263 ( 470 Ohm ).
Change COBBA (N250) if necessary.
TDMA – noise
If audio is distorted by TDMA – noise, make sure that PCB is clean.
Further more it is necessary to assemble the phone with a torque screwdriver with the required torque of 17 Ncm.
NSM-3: Try to change the mainframe assy, RF can, antenna.
NSM-2: Try to change the B-Cover and/or the speaker/ metal gasket and/or slide.
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USER INTERFACE FAILURE
Display failure
Check mechanical appearance of display.
Check Vbb 2.8V at C330.
Probably MAD faulty.
Keypad no function
Check if contacts of domesheet / keymat are dirty.
Clean PCB if necessary, check surface of LCD-module (bend?).
Check resistance of ROW and COL lines between the keys.
Probably MAD faulty.
Backlight failure
Check KBlights 2.8V at pin 7/15 of N310. If not ok, there could be a break between D200 and N310, or MAD is faulty.
Check Vb 3.6V pin 1 and Vbb 2.8V pin 2 of N310.
Check resistance of R310 and R311.
Check Vb at LED´s V320-325 and V331-340.
If keypad backlight is not bright enough, change resistor R311 from 39kOhm to 10kOhm (See also NSM-2 service bulletin 23).
Buzzer failure
Check mechanical condition of buzzer.
Check Vb 3.6V at B301.
Check Vb 3.6V pin 1 and Vbb 2.8V pin 2 of N310
Check buzzer signal at pin 6 of N310.
Check buzzer_cnt signal at pin 3 of N310. If not ok, there could be a break between D200 and N310, or MAD is faulty.
Vibra failure (only for 8210)
Check version of vibramotor, add support tape if necessary (see also NSM-3 service bulletin 11).
Check Vb 3.6V at V350.
Check Vb 3.6V pin 1 and Vbb 2.8V pin 2 of N310.
Check vibra signal at pin 16 of N310. If not ok, check vibra_cnt at pin 19 of N310.
If signal is ok at pin 19, change N310, else there is a break between D200 and N310, or MAD is faulty.
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Service & Analysis Center Europe Repairhints Version 2.0 Approved
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CLOCK TIME PROBLEMS
Clock time has to be corrected in short periods.
Check amplitude and frequency of sleepclock oscillator at J228 (3,2Vpp squarewave at 32.768kHz).
If amplitude or frequency is not ok, change crystal B100. If fault persists, check parts around B100 like R100/102/154
and C101/102/113.
Clock time is lost after removing battery
Check mechanical appearance of RTC-battery, especially the angles of the batterysprings.
If necessary bend them as shown in the first picture for the plus (short) spring and in the second for the minus (longer) spring
with help of tweezers. Also see NSM2 service bulletin 20.
The bending of the battery-spring should be always done, also with new batteries!
After changing the RTC-battery it is necessary to charge it. This can easily be done
by putting the battery on the phone for 10 to 15 minutes (It is not necessary to switch on the phone).After that,
RTC-battery should be able to save the clocktime.
If the fault still remains, it is probably necessary to change CCONT (N100) or CHAPS (N101).
Note that you have to run energy management calibration after changing CCONT!
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Product-Codes NSM - 2
06. Jul 00
Product-Code SIM-Lock Data Operator
0501899 APAC / BASIC TR
0502573 APAC - A
0502939 EURO - A
0502940 EURO-C
0503072 APAC-A
0503093 EURO-B
0503094
0503095
0503096
No SIM-Lock
MCC & MNC 00101
MSIN 0000000001
EURO-D
EURO-E
EURO-F
0503097 EURO-G
0503098 EURO-H
0503525 EURO-F
0503526 EURO-E
0503527 EURO-C ALS
0503528 EURO-D
0503529 APAC-B
0503530 APAC-C
0503595 APAC BOPOMOFO TR
0503596 APAC STROKE TR
0503597 APAC LATIN TR
0503612 APAC-C
Product-Codes NSM - 3 30. Aug 00
0502688 APAC / Basic TR
0502689 EURO - C
0503139 Basic TR "RED"
0503140 APAC STROKE
0503220 EURO - A
0503240 EURO - B
0503241
0503242
0503243
No SIM-Lock
MCC & MNC 00101
MSIN 0000000000
EURO - D
EURO - E
EURO - F
0503244 EURO - G
0503245 EURO - H
0503246 APAC - A
0503247 APAC - B / Blue
0503377 EURO - D / Russia
0503378 EURO - E / Hungary
0503379 EURO - F / Poland
0503380 EURO - I
0503381 EURO - C ALS
0503472 APAC Bopomofo
© 2000 NMP
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Product-Codes NSM - 3
Product-Code SIM-Lock Data Operator
0503473 APAC - A STROKE
0503474 APAC - C
0503475 APAC - C
0503491 Basic TR / APAC - B / STROKE Blue
0503974 EURO - C Network Monitoring
0504317 EURO - C Bouygues
0504415 Orange / Basic TR / Blue / Logo
0504416 Movistar / Basic TR / Grey / Logo
0504418 Basic TR "BLUE"
0504419 EURO - A Blue
0504422 EURO - D Blue
0504427 EURO - E Blue
0504428 EURO - F Blue
0504431 EURO - G Blue
0504432 EURO - H Blue
0504433
0504434
0504435
No SIM-Lock
MCC & MNC 00101
MSIN 0000000000
EURO - E Blue / Hungary
EURO - F Blue / Poland
EURO - C ALS Blue
0504436 EURO - C Blue
0504450 EURO - D Blue / Russia
0504451 EURO - B
0504573 Basic TR / TIM / Blue / Logo
0504578 EURO - C TIM
0504580 Basic TR / BLU / Blue / Logo
0504581 Basic TR / APAC / Bopomofo Blue
0504582 APAC - A
0504584 EURO - C / BLU
0504585 APAC - A STROKE Blue
0504586 Basic TR / Airtel / Grey / Logo
0504587 Basic TR / APAC-A / STROKE Blue
0504611 Basic TR / Amena / Grey / Logo
0504615 EURO - A / Amena
0504761 EURO - F / ERA Poland Blue
0504763 EURO - F / Centertel Poland
0504778 APAC - C Korea Blue
0504779 APAC - C NOKIA Blue
0504780 APAC - B Basic TR / Blue
© 2000 NMP
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Product-Codes NSM - 3
Product-Code SIM-Lock Data Operator
0504339 MCC & MNC 20810 EURO - C
MSIN ?????????? SFR
0504344 MCC & MNC 26806 EURO - D
MSIN ?????????? TMN
0504369 MCC & MNC 20408 EURO - C
MSIN ?????????? KPN
0504372 MCC & MNC 23203 EURO - C
MSIN ?????????? Maxmobil
0504392 MCC & MNC 26801 EURO - D
MSIN ?????????? Telecel
0504417 MCC & MNC 21407 EURO - A
MCC & MNC 21402
MSIN ?????????? Movistar
0504437 MCC & MNC 23433 EURO - I
MCC & MNC 23486
MSIN ?????????? Orange
0504470 MCC & MNC 23201 EURO - C
MSIN ?????????? Mobilkom
0504504 MCC & MNC 26001 EURO - F
MSIN ?????????? Polcomtel
0504579 MCC & MNC 23205 EURO - C
MSIN ?????????? Connect
0504588 MCC & MNC 21401 EURO - A
MSIN ?????????? Airtel Club
0504591 MCC & MNC 23430 EURO - C
MSIN ?????????? One2One
0504760 MCC & MNC 26801 EURO - D
MSIN ?????????? Telecel ( Blue )
0504783 MCC & MNC 23205 EURO - C
MSIN ?????????? Connect ( Blue )
0504807 MCC & MNC 26806 EURO - D
MSIN ?????????? TMN ( Blue )
0505030 MCC & MNC 23203 EURO - C
MSIN ?????????? MaxMobil
0505161 MCC & MNC 23201 EURO - C
MSIN ?????????? Mobilkom
0505167 MCC & MNC 21403 EURO - A
MSIN ?????????? Amena Exclusivo
© 2000 NMP
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CONFIDENTIAL 35 (35)
NSM-2/3
Service & Analysis Center Europe Repairhints Version 2.0 Approved
SACE CC Training Group 2000-10-16
CHANGE HISTORY
Originator Status Version Date Comment
CC-TrainingGroup
CC-TrainingGroup
CC-TrainingGroup
CC-TrainingGroup
Draft 0.1 05.10.2000 First draft version for the repair group
Draft 0.3 09.10.2000 Comments of repairgroup added.
Approved 1.0 11.10.2000 First CC version.
Approved 2.0 16.10.2000 Frequency list added.
© 2000 NMP
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