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PAMS Technical Documentation NSM3 Series Transceivers
Disassembly & Troubleshooting Instructions
Issue 1 12/1999
E Nokia Mobile Phones Ltd.
NSM3 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
CONTENTS
Disassembly of NSM3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transceiver Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Baseband Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . PCB Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . System Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sleep Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Phone is totally dead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flash programming fails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power doesn't stay on or phone is jammed . . . . . . . . . . . . Contact Service on the phone display . . . . . . . . . . . . . . . . . SIM related faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Audio faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Charging fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RF Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 7 7 9 10 11 12 13 16 16 16 16 18 19 21 22
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PAMS Technical Documentation
NSM3 Disassembly & Troubleshooting Instructions
Disassembly of NSM3
1.
Remove battery. Step 1. Press the button at the bottom of the phone. Step 2. Slide the cover downwards and the cover will be released.
2.
Step 3. Lift the battery first from the bottom end. Step 4. Remove the battery.
3.
Remove the SIM card from its location.
4.
Remove Acover. Step 1. Press the button on the top of the phone. Step 2. Pull Acover apart. NOTE snap fixings at the lower end of Acover.
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NSM3 Disassembly & Troubleshooting Instructions 4
PAMS Technical Documentation
5 6
5.
1 2 3
To remove the PCB from the housing remove the 6 screws. NOTE: Here is shown the assembly order.
NOTE: When assembling the screws, use 17 Ncm torque.
6.
Remove the PCB from Bcover.
Parts can be separated.
7.
Latch and latch spring can be separated after removal of the left Acover fixing.
8.
1.
1. When taking the PCB and UI module apart remember the snap fixings on both sides of the LCD. NOTE: When assembling make sure UI and PCB module edges are fitted also correctly.
9.
Remove the speaker from its housing. NOTE: Install allways new speaker, old speaker must not be used.
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NSM3 Disassembly & Troubleshooting Instructions
10.
Remove the RTC battery from its housing in UI module.
11.
Remove the volume switch and key from the Bcover housing.
12.
Remove the battery connector from its housing using SRT3 tool.
13.
Remove the antenna by releasing the snap fixings at both sides of the phone.
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NSM3 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
14.
Remove the SIM spring by releasing the fixings at both ends of the spring.
Main parts of the phone disassembled.
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PAMS Technical Documentation
NSM3 Disassembly & Troubleshooting Instructions
Transceiver Troubleshooting
Baseband Troubleshooting
Because of the underfilling of the MAD and combo memory, it is impossible to change those.
PCB Test Points
Reference C213 J100* J101 J102 J103 Signal RFC PWM FBUSTX FBUSRX MBUS Note MAIN CLOCK (13MHz) HAGAR (N505) > MAD (D200) CHARGE CURRENT CONTROL CCONT (N100) > CHAPS (N101) FBUS TRANSMITTED DATA MAD (D200) > SERVICE INTERFACE FBUS RECEIVED DATA SERVICE INTERFACE > MAD (D200) ONE WIRE TWO DIRECTION SERIAL BUS (9600 BIT/S) MAD (D200) <> SERVICE INTERFACE CCONT (N100) CHIP SELECT MAD (D200) > CCONT (N100) SIM DATA CCONT (N100) <> SIM CARD READER (X302) SIM IO CONTROL CCONT (N100) <> SIM CARD READER (X302) CCONT (N100) INTERRUPT MAD (D200) > CCONT (N100) 26MHz SYSTEM CLOCK CONTROL MAD (D200) > VCXO (G830) POWER UP RESET CCONT (N100) > MAD (D200) SLEEP CLOCK (32kHz) CCONT (N100) > MAD (D200) GROUND
J104 J121#
CCONT CSX DATA_A
J122#
SIMIO/O_C
J223 J226 J227 J228 J230 J234* J235 J236 J237 J239 J240
CCONT INT VCXOPWR PURX SLEEPCLK GND
HAGAR _RESET_X HAGAR (N505) RESET MAD (D200) > HAGAR (N505) ROM1SELX RAMSELX SYNTHDATA (SDATA) DSPXF MCURDX FLASH CHIP SELECT MAD (D200) > COMBO MEMORY (D210) RAM CHIP SELECT MAD (D200) > COMBO MEMORY (D210) HAGAR (N505) SERIAL DATA MAD (D200) > HAGAR (N505) NOT CONNECTED MCU READ MAD (D200) > COMBO MEMORY (D210)
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NSM3 Disassembly & Troubleshooting Instructions
Reference J241 J242 J245* R205# J250 J251 J252 J253 J254 J255 J255 J256 J257 J258* Signal MCUWRX MCUAD1 SCLK COBBA CSX COBBA SDA COBBA CLK PCMRXDATA PCMDCLK PCMSCLK ESYSRESETX PCMTXDATA CCUT (MCUGENIO0) BUTTON_CTRL (MCUGENIO1) MCUGENIO2 EXTMCUDA0 TXP MIC KBD LIGHT
PAMS Technical Documentation
Note MCU WRITE MAD (D200) > COMBO MEMORY (D210) MCU ADDRESS LINE 1 MAD (D200) > COMBO MEMORY (D210) HAGAR (N505) SERIAL CLOCK MAD (D200) > HAGAR (N505) COBBA (N250) CHIP SELECT MAD (D200) > COBBA (N250) COBBA (N250) SERIAL BUS DATA MAD (D200) <> COBBA (N250) COBBA (N250) SERIAL BUS CLOCK MAD (D200) > COBBA (N250) AUDIO RECEIVED DATA COBBA (N250) > MAD (D200) AUDIO DATA CLOCK (512KHz) MAD (D200) > COBBA (N250) AUDIO SYNC CLOCK (8kHz) MAD (D200) > COBBA (N250) COMPOMEMORY (D210) ENABLE MAD (D200) > COMBO MEMORY (D210) AUDIO TRANSMITTED DATA MAD (D200) > COBBA (N250) CHARGE CUT MAD (D200) > CHAPS (N101) HEADSET BUTTON DETECTION CONTROL MAD (D200) > XMICP NOT CONNECTED MCU DATA LINE 0 MAD (D200) <> COMPOMEMORY (D210) TRANSMITTER POWER CONTROL MAD (D200) > RF MIC BIAS VOLTAGE, 2.1V IF NO MIC V250 > MIC KEYPAD LED LIGHT CURRENT UISWITCH (N310) > KEYPAD BACKLIGHT LEDS KEYPAD BACKLIGHT BRIGHTNESS ADJUSTMENT R311 > UISWITCH (N310) VIBRA DRIVE UISWITCH (N310) > VIBRA (M300) VIBRA CONTROL PWM MAD (D200) > UISWITCH (N310) BUZZER CONTROL PWM MAD (D200) > UISWITCH (N310)
J259 J260 J299* R745# L200 N310 PIN 13
N310 PIN 14
KBDLED_ADJ
N310 PIN 16 N310 PIN 19 N310 PIN 3
VIBRA_CTRL VIBRA BUZZER
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Reference N310 PIN 6 N310 PIN 7 Signal
NSM3 Disassembly & Troubleshooting Instructions
Note BUZZER DRIVE UISWITCH (N310) > BUZZER (B301) KEYPAD AND DISPLAY BACKLIGHT CONTROL MAD (D200) > UISWITCH (N310) LCD BACKLIGHT BRIGHNESS ADJUSTMENT R310 > UISWITCH (N310) LCD LED LIGHT CURRENT UISWITCH (N310) > DISPLAY BACKLIGHT LEDS IRDA (N400) SHUTDOWN MAD (D200) > IRDA (N400) 2.8V N401 > IRDA (N400) POWER ON BUTTON POWER BUTTON (S330) > CCONT (N100) HAGAR (N505) CHIP SELECT MAD (D200) > HAGAR (N505) FLASH PROGRAMMING VOLTAGE N220 > COMPOMEMORY (D210) ACCESSORY DETECTION XMICP > CCONT (N100)
BUZZER_CTRL KBLIGHTS
N310 PIN 8
LCDLED_ADJ
N310 PIN 9
LCD LIGHT
N400 PIN 4 N401 PIN 4 R118 R206 R211 R277
IRONX IRDA POWER PWRONX SENA VPP EAD
*Only in NSM2. #Only in NSB6.
Testing
The MCU software enters a local mode at startup 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 PClocals software. Baseband internal connections are tested with selftests if possible. Parameters cannot be set accurate enough by design because of component tolerances. Due to use of 5% resistor values, the channels of the CCONT A/D converters need to be aligned in the production phase. Within 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. E Nokia Mobile Phones Ltd.
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PAMS Technical Documentation
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
Clock signal buffer V800++
HAGAR 13MHz N505 /2
MAD C213
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NSM3 Disassembly & Troubleshooting Instructions
System Clock
Check the signal from the C213 Layout picture B signal RFC, should be like in SYSTEM CLOCK picture. IF NOT Check the signal from the RF side buffer input C829. If there is signal, check the R829,R834,R830,V800, C834 and L800 IF THERE ISN'T IF Check the signal from the RF side IS oskilator VCXO G830 output fron C833. There should be 26MHz signal. IF THERE ISN'T Change the VCXO G830 Change the Hagar N505
System clock picture. E Nokia Mobile Phones Ltd.
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Sleep Clock
Check the signal from the J228 Layout picture B signal Clk 32kHz, should be like in SLEEP CLOCK picture. IF NOT
Check R100, R154, R102, C102, C101, C113 and B100
IF OK Change the CCONT N100
Sleep clock picture.
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NSM3 Disassembly & Troubleshooting Instructions
Power Supplies
Measure power supplies. Test points are shown in layout picture A. Layout shown here is NSM2.
A
Vbat Vbb Vcore Vsyn2 Vsyn1 VTX VRX Vcobba Vref VXO
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NSM3 Disassembly & Troubleshooting Instructions Vbb Vcore Vcobba Vref Vbat VXO VRX VTX Vsyn1 Vsyn2 = 2.7V 2.87V = 1.3V 2.65V = 2,67V 2.85V = 1.48V 1.523V = 3.11V 4.2V = 2,67V 2.85V = 2,67V 2.85V = 2,67V 2.85V = 2,67V 2.85V = 2,67V 2.85V
PAMS Technical Documentation
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)
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NSM3 Disassembly & Troubleshooting Instructions
B
Xf CLK 32 kHz PURX Ccont int. VXO Pwr ESysResetX RFC
MCUAd1 MCUWrX MBUS
FBUSTx FBUSRx ROM1SelX MCURdX
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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 programming must be done via PCB pads visible through the shield under the battery. The main difference between these is that FLASHprogramming 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 information 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:
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NSM3 Disassembly & Troubleshooting Instructions
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
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SIM related faults
The hardware of the SIM interface from MAD2 (D200) to the SIM connector (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 factory set values (stored to the emulated EEPROM) are not correct.
Check the Vsim. Is it 3V or 5V OK Vsim (C128 bottom connector side head ) IF NOT OK Check the Vsrm (C131 RF side head) V5V (C108 bottom connector side head) IF NOT OK Check the regulator N600, V116, C132 and C131
Check the V104. R128, R125, R124 and C128
OK
Change the CCONT N100
OK
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NSM3 Disassembly & Troubleshooting Instructions
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 R266, C268, L287 and V250
OK
Check the R268,C 274,C263,C278 and C262 OK Change the COBBA N250
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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
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NSM3 Disassembly & Troubleshooting Instructions
Charging fault
Display " not charging"
Check charge voltage with wintesla
Check F101, V100,R104 and R103
OK
Check charge current with wintesla IF NOT OK Check V101 and R131 OK Change the Chaps N101
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PAMS Technical Documentation
RF Troubleshooting
Layout shown here is NSM2.
PA_PCN_out PA_in ant_sw_IN PA_GSM_out ant_sw_ctrl (PCN)
PA_ctrl (GSM) PA_ctrl (PCN)
ant_sw_ctrl (GSM) RX_GSM (lna_in) RX_PCN (lna_in)
PA_buff_in TXI TX_balout(PCN) TXC TX_balout(GSM) Vchp 5V5 1.35V (RX) VCO_out 1.2V (RX) TCXO/2 (13 MHz) RX_GSM (balun_in) AFC RX_PCN (balun_in)
RXI (filt) TCXO (26 MHz)
VCO_ctrl RXQ (filt)
TXQ Vsynte Vlna Vmod Vrxrf RX I/Q (ADC)
Vtcxo +1.5V Vcobba
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