Nokia NSM-2 Series Installation instructions

PAMS Technical Documentation
NSM–2 Series Transceivers
Issue 1 12/1999 Nokia Mobile Phones Ltd.
Disassembly &
Troubleshooting
Instructions

NSM–2
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 2 Issue 1 12/1999
Nokia Mobile Phones Ltd.
CONTENTS
Disassembly of NSM–2 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transceiver Troubleshooting 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Baseband Troubleshooting 7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCB Test Points 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Clock 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sleep Clock 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supplies 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Phone is totally dead 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flash programming fails 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power doesn’t stay on or phone is jammed 16. . . . . . . . . . . .
Contact Service on the phone display 16. . . . . . . . . . . . . . . . .
SIM related faults 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio faults 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging fault 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF Troubleshooting 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NSM–2
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 3
Issue 1 12/1999 Nokia Mobile Phones Ltd.
Disassembly of NSM–2
Remove battery.
Remove the SIM card from its location.
Step 1. Open the slide cover.
Step 2. Push the slide edge outwards.
NOTE: Use only numbered side 2 to release the slide.
Step 3. Lift the slide up simultaneously and the slide
will be released.
Step 3. Lift the battery first
from the lower end.
Step 4. Remove the battery.
Step 1. Press the button on the side.
Step 2. Slide the cover downwards and
the cover will be released.
Remove the slide cover.
1. 2.
3.
4.
1.
2.
1.
2.
3.

NSM–2
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 4 Issue 1 12/1999
Nokia Mobile Phones Ltd.
Remove keymat module
screws (2 or 3pcs de-
pending on the model).
Remove the frame
screws (4 pcs).
Screws are num-
bered according to
the tightening order.
Step 1. To remove the antenna, push with the thin spike
of SRT–3 (Battery Connector Extractor Tool) forward to
release the snaps.
Step 2. Release snap fixing using screw driver.
Step 3. Lift up the antenna.
NOTE: Models with no hole in the frame, push firmly the
antenna (1. arrow direction) to release the snaps. Use
screw driver to release snap fixing (2. arrow). Lift up the
antenna (3. arrow).
NOTE: Be careful not brake the middle frame.
Remove A–cover, speaker
and power button.
NOTE: When
assembling the
screws, use 17
Ncm torque.
NOTE: When assembling the
screws, use 17 Ncm torque.
12
3
4
Remove the antenna.
5.
6.
7.
8.

NSM–2
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 5
Issue 1 12/1999 Nokia Mobile Phones Ltd.
Parts can be separated:
– lcd module
– PCB
– buzzer rubber
– metal gasket
– bottom connector
– SIM connector
– vibra
Push SW/slide switch before removing
the keymat module. Now remove the
keymat module and rtc–battery.
NOTE: Be careful not to damage the
SW/slide switch on the PCB.
9.
10.

NSM–2
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 6 Issue 1 12/1999
Nokia Mobile Phones Ltd.
Turn the phone around.
Press down battery conector springs
using Battery Connector Extractor Tool.
Battery connector will be released.
Remove the volume switch 1.
Remove the volume key 2.
12.
11.
13.
Release the latch snap.
Remove the latch and latch spring.

NSM–2
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 7
Issue 1 12/1999 Nokia Mobile Phones Ltd.
Transceiver Troubleshooting
Baseband Troubleshooting
Because of the underfilling of the MAD and combo memory, it is impossible
to change those.
PCB Test Points
Reference Signal Note
C213 RFC MAIN CLOCK (13MHz)
HAGAR (N505) –> MAD (D200)
J100* PWM CHARGE CURRENT CONTROL
CCONT (N100) –> CHAPS (N101)
J101 FBUSTX FBUS TRANSMITTED DATA
MAD (D200) –> SERVICE INTERFACE
J102 FBUSRX FBUS RECEIVED DATA
SERVICE INTERFACE –> MAD (D200)
J103 MBUS ONE WIRE TWO DIRECTION SERIAL BUS
(9600 BIT/S)
MAD (D200) <–> SERVICE INTERFACE
J104 CCONT CSX CCONT (N100) CHIP SELECT
MAD (D200) –> CCONT (N100)
J223 CCONT INT CCONT (N100) INTERRUPT
MAD (D200) –> CCONT (N100)
J226 VCXOPWR 26MHz SYSTEM CLOCK CONTROL
MAD (D200) –> VCXO (G830)
J227 PURX POWER UP RESET
CCONT (N100) –> MAD (D200)
J228 SLEEPCLK SLEEP CLOCK (32kHz)
CCONT (N100) –> MAD (D200)
J230 GND GROUND
J234* HAGAR _RESET_X HAGAR (N505) RESET
MAD (D200) –> HAGAR (N505)
J235 ROM1SELX FLASH CHIP SELECT
MAD (D200) –> COMBO MEMORY (D210)
J236 RAMSELX RAM CHIP SELECT
MAD (D200) –> COMBO MEMORY (D210)
J237 SYNTHDATA
(SDATA) HAGAR (N505) SERIAL DATA MAD (D200) –> HAGAR (N505)
J239 DSPXF NOT CONNECTED
J240 MCURDX MCU READ
MAD (D200) –> COMBO MEMORY (D210)
J241 MCUWRX MCU WRITE
MAD (D200) –> COMBO MEMORY (D210)
J242 MCUAD1 MCU ADDRESS LINE 1
MAD (D200) –> COMBO MEMORY (D210)

NSM–2
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 8 Issue 1 12/1999
Nokia Mobile Phones Ltd.
NoteSignalReference
J245* SCLK HAGAR (N505) SERIAL CLOCK
MAD (D200) –> HAGAR (N505)
J250 COBBA CSX COBBA (N250) CHIP SELECT
MAD (D200) –> COBBA (N250)
J251 COBBA SDA COBBA (N250) SERIAL BUS DATA
MAD (D200) <–> COBBA (N250)
J252 COBBA CLK COBBA (N250) SERIAL BUS CLOCK
MAD (D200) –> COBBA (N250)
J253 PCMRXDATA AUDIO RECEIVED DATA
COBBA (N250) –> MAD (D200)
J254 PCMDCLK AUDIO DATA CLOCK (512KHz)
MAD (D200) –> COBBA (N250)
J255 PCMSCLK AUDIO SYNC CLOCK (8kHz)
MAD (D200) –> COBBA (N250)
J255 ESYSRESETX COMPOMEMORY (D210) ENABLE
MAD (D200) –> COMBO MEMORY (D210)
J256 PCMTXDATA AUDIO TRANSMITTED DATA
MAD (D200) –> COBBA (N250)
J257 CCUT (MCUGE-
NIO0) CHARGE CUT MAD (D200) –> CHAPS (N101)
J258* BUTTON_CTRL
(MCUGENIO1) HEADSET BUTTON DETECTION CON- TROL
MAD (D200) –> XMICP
J259 MCUGENIO2 NOT CONNECTED
J260 EXTMCUDA0 MCU DATA LINE 0
MAD (D200) <–> COMPOMEMORY (D210)
J299* TXP TRANSMITTER POWER CONTROL
MAD (D200) –> RF
L200 MIC MIC BIAS VOLTAGE, 2.1V IF NO MIC
V250 –> MIC
N310 PIN 13 KBD LIGHT KEYPAD LED LIGHT CURRENT
UI–SWITCH (N310) –> KEYPAD BACK-
LIGHT LEDS
N310 PIN 14 KBDLED_ADJ KEYPAD BACKLIGHT BRIGHTNESS AD-
JUSTMENT
R311 –> UI–SWITCH (N310)
N310 PIN 16 VIBRA_CTRL VIBRA DRIVE
UI–SWITCH (N310) –> VIBRA (M300)
N310 PIN 19 VIBRA VIBRA CONTROL PWM
MAD (D200) –> UI–SWITCH (N310)
N310 PIN 3 BUZZER BUZZER CONTROL PWM
MAD (D200) –> UI–SWITCH (N310)
N310 PIN 6 BUZZER_CTRL BUZZER DRIVE
UI–SWITCH (N310) –> BUZZER (B301)
N310 PIN 7 KBLIGHTS KEYPAD AND DISPLAY BACKLIGHT CON-
TROL
MAD (D200) –> UI–SWITCH (N310)

NSM–2
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 9
Issue 1 12/1999 Nokia Mobile Phones Ltd.
NoteSignalReference
N310 PIN 8 LCDLED_ADJ LCD BACKLIGHT BRIGHNESS ADJUST-
MENT
R310 –> UI–SWITCH (N310)
N310 PIN 9 LCD LIGHT LCD LED LIGHT CURRENT
UI–SWITCH (N310) –> DISPLAY BACK-
LIGHT LEDS
N400 PIN 4 IRONX IRDA (N400) SHUTDOWN
MAD (D200) –> IRDA (N400)
N401 PIN 4 IRDA POWER 2.8V
N401 –> IRDA (N400)
R118 PWRONX POWER ON BUTTON
POWER BUTTON (S330) –> CCONT (N100)
R206 SENA HAGAR (N505) CHIP SELECT
MAD (D200) –> HAGAR (N505)
R211 VPP FLASH PROGRAMMING VOLTAGE
N220 –> COMPOMEMORY (D210)
R277 EAD ACCESSORY DETECTION
XMICP –> CCONT (N100)
*Only in NSM–2..
Testing
The MCU software enters a local mode at start–up if suitable resistors are
connected to the BTEMP and BSI lines.
NOTE! Baseband doesn’t wake up automatically when the battery voltage
is connected. Power must be switched on by
pressing the Power key or
inserting a waking pulse BTEMP line or
connecting a charger
In the local mode the baseband can be controlled through MBUS or
FBUS connections by a PC–locals software. Baseband internal connec-
tions are tested with selftests if possible.
Parameters cannot be set accurate enough by design because of compo-
nent tolerances. Due to use of 5% resistor values, the channels of the
CCONT A/D converters need to be aligned in the production phase. With-
in battery voltage tuning the MCU software reads the A/D reading from
CCONT at 4.1V and stores this reading to emulated EEPROM memory as
a reference point. Another reference point is created by assuming that
while the input voltage is zero, A/D reading is also zero. Now the slope is
known and A/D readings can be calibrated. Calibration is included in
VBATT A/D reading task.

NSM–2
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 10 Issue 1 12/1999
Nokia Mobile Phones Ltd.
Troubleshooting
Troubleshooting instructions are divided into following sections:
How to check/fix the system/sleep clock.
How to check/fix the power supplies.
Contact service case.
How to check/fix the SIM faults.
How to check/fix the Audio faults.
How to check/fix the charger faults.
The first thing to do is to carry out a thorough visual check of the module.
Make sure that:
– there are no mechanical damages
– solder joints are OK
Before changing anything ALL SUPPLY VOLTAGES AND SYSTEM
CLOCK / SLEEP CLOCK should be checked.
26MHz VCXO
G830
HAGAR
N505
Clock signal
buffer
V800++
MAD
C213
/2
13MHz

NSM–2
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 11
Issue 1 12/1999 Nokia Mobile Phones Ltd.
System Clock
Check the signal from the C213
Layout picture B signal RFC,
should be like in SYSTEM
Check the signal from the RF side
buffer input C829. If there is signal,
check the R829,R834,R830,V800,
C834 and L800
IF NOT
Check the signal from the RF side
oskilator VCXO G830 output fron
C833. There should be 26MHz
signal.
IF THERE ISN’T
Change the Hagar
N505
IF IS
Change the VCXO
G830
IF THERE ISN’T
CLOCK picture.
System clock picture.

NSM–2
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 12 Issue 1 12/1999
Nokia Mobile Phones Ltd.
Sleep Clock
Check the signal from the J228
Layout picture B signal Clk 32kHz,
should be like in SLEEP CLOCK
IF NOT
IF OK
Change the CCONT
N100
Check R100, R154, R102,
C102, C101, C113 and B100
picture.
Sleep clock picture.

NSM–2
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 13
Issue 1 12/1999 Nokia Mobile Phones Ltd.
Power Supplies
Measure power supplies. Test points are shown in layout picture A.
VXO
Vref
Vcobba
VRX
VTX
Vsyn1
Vsyn2
Vcore
Vbb
Vbat A

NSM–2
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 14 Issue 1 12/1999
Nokia Mobile Phones Ltd.
Vbb = 2.7V – 2.87V
Vcore = 1.3V – 2.65V
Vcobba = 2,67V – 2.85V
Vref = 1.48V – 1.523V
Vbat = 3.11V – 4.2V
VXO = 2,67V – 2.85V
VRX = 2,67V – 2.85V
VTX = 2,67V – 2.85V
Vsyn1 = 2,67V – 2.85V
Vsyn2 = 2,67V – 2.85V
Power up sequence test:
Cconts digital parts keep MAD in reset by keeping PURX down for a
delay of 62ms.
Here is shown the start up sequence picture.
Ch1 = Vbb
Ch2 = VXO
Ch3 = SleepClk
Ch4 = PURX (see picture B)

NSM–2
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 15
Issue 1 12/1999 Nokia Mobile Phones Ltd.
Xf
CLK 32 kH
z
PURX
Ccont int.
VXO Pwr
ESysReset
X
RFC
ROM1SelX
MCURdX
MCUWrX
M
CUAd1
B
MBUS FBUSRx FBUSTx

NSM–2
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 16 Issue 1 12/1999
Nokia Mobile Phones Ltd.
Phone is totally dead
The phone doesn’t take current at all when the power switch is pressed or
when the watchdog disable pin (X001 pin 11) is grounded. Make sure that
the battery voltage you use is within the specification, i.e. 3.11 .. 4.2 V. If
the voltage is lower, hardware of CCONT (N100) prevents power on.
IF battery voltage is inside the specification Change the CCONT.
Flash programming fails
The flash programming can be done via panel connector X001 or via
dedicated PCB pads. In production, the first programming is done via
panel connector. After this, the panel connector is cut away, thus the pro-
gramming must be done via PCB pads visible through the shield under
the battery. The main difference between these is that FLASH–program-
ming voltage is produced differently. The fault finding diagrams for flash
programming is shown in the start up sequence picture.
In flash programming error cases the flash prommer can give some in-
formation about a fault. The fault information messages could be:
– MCU doesn’t boot
– Serial clock line failure
– Serial data line failure
– External RAM fault
– Algorithm file or alias ID not found
– MCU flash Vpp error
Power doesn’t stay on or phone is jammed
If this kind of fault has come after flash programming, there are most
probably open joints in ICs. Solder the joints of ICs. Normally the power
will be switched off by CCONT (N100) after 30 seconds if the watchdog of
the CCONT can not be served by software. This updating can be seen
with an oscilloscope at CCONTCSX (J104). In normal case there is a
short pulse from “1” to “0” every 8 seconds. The power off function can be
prevented by connecting WDDIS (R118 edge side head) to ground.
Because of the underfill, check the supply voltages, clock signals and
power up sequence. If power on sequence fails, there are some open
connections under MAD or compomemory. If all seems to be correct, it is
best way to erase the flash memory and try to put new software to phone.
Contact Service on the phone display
This fault means that software is able to run and thus the watchdog of
CCONT (N100) can be served. Selftest functions are run when power is
switched on and software is executed from flash. If any of the selftests
fails, a “contact service” text is shown on display.
MCU self tests are devided to those executed while power up (start up
tests) and ones that can be executed with connected PC. The tests and
included items are as follows:

NSM–2
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 17
Issue 1 12/1999 Nokia Mobile Phones Ltd.
1. MCU ROM checksum
Calculates 16 bit checksum out of Flash code and compares it to one
found in Flash.
Items being checked are:
MAD2 <––> Flash data and address lines, CE0,CE1, WE, BYTE, Vcc,
GND, Flash internal functionality
2. MCU RAM interface
3. MCU RAM component
4. MCU EEPROM interface
5. MCU EEPROM component
6. RTC battery
7. CCONT interface
8. A/D converter
9. SW reset
A. Power off
B. Security data
C. EEPROM tune checksum
D. PPM checksum
E MCU download DSP
F. DSP alive
G. COBBA serial
H COBBA parallel
I. EEPROM checksum
K. PPM validity

NSM–2
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 18 Issue 1 12/1999
Nokia Mobile Phones Ltd.
SIM related faults
The hardware of the SIM interface from MAD2 (D200) to the SIM con-
nector (X302) can be tested without a SIM card. When the power is
switched on and the BSI line is grounded by a resistor, all the used lines
(VSIM, RST, CLK, DATA) rise up to 5 V four times. Thus “Insert SIM card”
faults can be found without SIM card.
The fault information “Card rejected” indicates that ATR message (the first
message is always sent from card to the phone) is sent from card but the
message is somehow corrupted, data signal levels are wrong etc. or fac-
tory set values (stored to the emulated EEPROM) are not correct.
IF NOT OK
IF NOT OK
Check the Vsim. Is it 3V or 5V
Vsim (C128 bottom connector side
head )
Check the Vsrm (C131 RF side head)
V5V (C108 bottom connector side
head)
Check the regulator N600, V116, C132
and C131
Check the V104. R128, R125, R124
and C128
OK
Change the CCONT N100
OK
OK

NSM–2
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 19
Issue 1 12/1999 Nokia Mobile Phones Ltd.
Audio faults
earpiece doesn’t work
and there isn’t any
mechanical problem
Check R 292, R291, L272 and L271
OK
Change the COBBA N250
Microphone doesn’t work
and there isn’t any
mechanical problem
Check the voltage in resistor
R267 RF side head. Voltage should be
about 2.1V
Check the R268,C 274,C263,C278
and C262
Check R266, C268, L287 and V250
OK
OK Change the COBBA N250

NSM–2
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 20 Issue 1 12/1999
Nokia Mobile Phones Ltd.
Headset earpiece doesn’t
work and there isn’t any
mechanical problem
Check R 257,R256, R270, L284, L283
C284, C283, C 296, C 297, C261and C255
OK
Change the COBBA N250
Headset earphone doesn’t
work and there isn’t any
mechanical problem
Check R 257,R256, R270, L284, L283
C284, C283, C 296, C 297, C261and C255
OK
Change the COBBA N250