Nokia NSM-4 Series Installation instructions
PAMS Technical Documentation
NSM–4 Series Transceivers
Issue 1 01/2002 Nokia Corporation
Disassembly &
Troubleshooting
Instructions
NSM–4
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 2 Issue 1 01/2002
Nokia Corporation
CONTENTS
Disassembly of NSM–4 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transceiver Troubleshooting 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Baseband Troubleshooting 10. . . . . . . . . . . . . . . . . . . . . . . . . . . .
PWB Test Points 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Clock 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sleep Clock 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supplies 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Phone is totally dead 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flash programming fails 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power doesn’t stay on or phone is jammed 19. . . . . . . . . . . .
Contact Service on the phone display 19. . . . . . . . . . . . . . . . .
SIM related faults 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio faults 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging fault 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF Troubleshooting 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NSM–4
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 3
Issue 1 01/2002 Nokia Corporation
Disassembly of NSM–4
NSM–4 phone disassembled.
NSM–4
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 4 Issue 1 01/2002
Nokia Corporation
Remove battery.
Step 3. Lift the battery first from the
lower end. Remove the battery.
Step 1. Press the button on the side.
1.
1.
Step 2. Slide the cover downwards and
it will be released.
2.
3.
NSM–4
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 5
Issue 1 01/2002 Nokia Corporation
Remove the SIM card from its location.
Step 1. Open the slide cover.
Remove 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.
1.
2. 3.
2.
3.
NSM–4
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 6 Issue 1 01/2002
Nokia Corporation
Step 1. To remove the antenna, push with the
thin spike of SRT–3 (Battery Connector Extrac-
tor Tool) forward to release the snaps and lift
up the antenna.
NOTE: Be careful not brake the middle frame.
Remove the antenna.
4.
5. Remove the A–cover.
Remove the frame screws (4 pcs). Screws are
numbered according to the tightening order.
NOTE: When assembling the screws,
use 14 Ncm torque.
1.
1
2
3
4
A–cover can now be removed.
Remove speaker if needed.
NSM–4
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 7
Issue 1 01/2002 Nokia Corporation
7.
6.
Remove keymat module screws (2 pcs).
NOTE: When assembling the
screws, use 17 Ncm torque.
Keymat module removed.
Push SW/slide switch before removing
the keymat module. Now remove the
keymat module.
NOTE: Be careful not to damage the
slide switch on the PWB.
Remove PWB and display.
Push from the side to release the PWB.
To remove the display release the snap fix-
ings in the display module.
Remove the keymat module.
NSM–4
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 8 Issue 1 01/2002
Nokia Corporation
Main frame and PWB apart.
Following parts can be separated from the
main frame:
– bottom connector
– SIM connector
– vibra
– metal gasket
8. Remove battery connector.
Turn the phone around.
Press down battery connector springs
using SRT–3 (Battery Connector Ex-
tractor Tool). Battery connector will be
released.
9.
Remove first the volume switch.
Then remove the volume key.
Remove volume switch and key.
NSM–4
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 9
Issue 1 01/2002 Nokia Corporation
10.
Parts separated from
the main frame.
NSM–4 phone disassembled.
NSM–4
Disassembly & Troubleshooting Instructions PAMS Technical Documentation
Page 10 Issue 1 01/2002
Nokia Corporation
Transceiver Troubleshooting
Baseband Troubleshooting
Because of the underfilling of the MAD and combo memory, it is impossible
to change those.
PWB 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)
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