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Nokia NSE–6 Series Disassembly & Troubleshooting Instructions

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PAMS Technical Documentation
NSE–6 Series Transceivers
Disassembly &
Troubleshooting
Instructions
Original 08/98

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  • Page 1 PAMS Technical Documentation NSE–6 Series Transceivers Disassembly & Troubleshooting Instructions Original 08/98...

  • Page 2: Table Of Contents

    NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation CONTENTS Page No Disassembly ......... Baseband Testing .

  • Page 3: Disassembly

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Disassembly Remove battery Step 1. Open slide cover. Step 2. Push slide edge outwards. Step 3. Lift slide up from the edge and slide will be released. Remove a–cover screws (2 pcs) NOTE: When assembling the screws, use 17 Ncm torque.
  • Page 4 NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Remove shield. Remove shield screws (2 pcs). Step 1. Push slide detector switch to the bottom and hold. Step 2. Release main pcb by lifting rear up and pulling. Remove main pcb. Step 1.

  • Page 5: Baseband Testing

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Baseband 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 via: 1.

  • Page 6: Trouble Shooting

    NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Trouble Shooting The following hints should facility finding the cause of the problem when the circuitry seems to be faulty. This trouble shooting instruction is di- vided following section. 1. Phone is totally dead 2.

  • Page 7: Phone Is Totally Dead

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Phone is totally dead This means that the phone doesn’t take current at all when the power switch is pressed or when the watchdog disable pin (X001 pin 11, J111) is grounded. Used battery voltage must be higher than 3.1 V. Otherwise the hardware of CCONT (N100) prevents totally power switch–on.
  • Page 8 NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation In cases of unsuccesful flash programming there is a possibility to check short circuits between the memories and the MCU (MAD2). It is useful to do this test, when the fault information is: MCU doesn’t boot, Serial clock line failure or Serial data line failure.

  • Page 9: Flash Programming Failure (1)

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Flash Programming failure (1) Flash programming doesn’t work via panel connector If the fault information from prommer is: a) MCU doesn’t boot b) Serial data line failure c) Serial clock line failure connect watchdog disable (WDDIS, J111) line to the ground VBB (R115, C107 upper side) 2.8 V...

  • Page 10: Flash Programming Failure (2)

    NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Flash Programming failure (2) Flash programming doesn’t work Flash programming doesn’t work via panel connector via panel connector If the fault information is: If the fault information is: Algorithm file or alias ID don’t find, External RAM fault ID is unknown etc.

  • Page 11: Flash Programming Failure (3)

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Flash Programming failure (3) Flash programming doesn’t work If the fault information from prommer is: a) MCU doesn’t boot b) Serial data line failure c) Serial clock line failure connect watchdog disable (WDDIS, J111) line to the ground VBB (R115, C107 upper side) 2.8 V Faulty circuit N100...

  • Page 12: Flash Programming Failure (4)

    NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Flash Programming failure (4) Flash programming doesn’t work Flash programming doesn’t work If the fault information is: If the fault information is: Algorithm file or alias ID not found, External RAM fault ID is unknown etc.

  • Page 13: Power Doesn't Stay On, Or Phone Is Jammed

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions 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. The solder joints of ICs: MAD2 (D200), Flash (D220) and SRAM (D230) are to be checked at the extent possible (by microscope from the side of PCB and lightly pressing components while switching power on).

  • Page 14: Display Information: Contact Service

    NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Display Information: Contact Service 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”...

  • Page 15: The Phone Doesn't Register To The Network Or Phone Doesn't Make A Call

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions The phone doesn’t register to the network or phone doesn’t make a call If the phone doesn’t register to the network or the phone doesn’t make a call, the reason could be either on baseband or RF. The phone can be set to wanted mode with WinTesla service software in order to find out wheth- er the fault is in RF or in baseband (RF interface measurements).
  • Page 16 NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation constants init inialize download Patch code download Iinitialization done Last PSW OK search channel scan Sycronization starts Send RACH Go SDCCH immediate RACH OK assignment OK (transmitter on) (phone in serve state) Original 08/98 Page 16...

  • Page 17: Phone Register Failure

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Phone register failure Phone doesn’t register to network or phone doesn’t make a call Analog supply voltage VCOBBA is > 2.7 V Check CCONT (N100) at C280 (C281, C282..) Analog reference voltage Vref is 1.5 V Check R253, R251 at C251 (R253 lower side) –...

  • Page 18: Sim Card Related Failures

    NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation SIM card related failures The hardware of the SIM interface from MAD2 (D200) to the SIM connec- tor (X451) can be tested without a SIM card. When the power is switched on and the BSI line (J122) is grounded by a resistor, all the used lines (VSIM, RST, CLK, DATA) rise up to 5 V four times.

  • Page 19: Sim Card Failure

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions SIM Card failure Card rejected fault VSIM (J252): 2.8 V min (with 3 V SIM card) CCONT (N100) faulty 4.5 V min (with 5 V SIM card) The ATR data can be seen at J116 Check R124, X451 SIMIOControl line (J115) is ”1”...

  • Page 20: Audio Failure

    NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Audio failure Uplink (microphone) and downlink (earphone) are disfunctional Voltage at HOOKDET (C260) 2.8 V (without headset) Check R259, R260 Voltage at HEADDET (C261) Check R256, R257, R261 2.8 V (without headset) Check Cobba (N250) Frequency at J257 is square wave 8 kHz 2.8 Vpp...

  • Page 21: Charger Failure

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Charger failure Nothing happens when charger is connected Check F101, L104 Voltage at R103 is higher than 0.4 V R104, R103 when the charger is connected Check CCONT (N100) Display information: Not charging Voltage at C120 is about 0.8 V Check R120, R122, when the power is connected...

  • Page 22: Receiver Fault (1)

    NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Receiver Fault (1) Original 08/98 Page 22...

  • Page 23: Receiver Fault (2)

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Receiver Fault (2) Original 08/98 Page 23...

  • Page 24: Receiver Fault (3)

    NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Receiver Fault (3) Original 08/98 Page 24...

  • Page 25: Receiver Fault

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Receiver Fault (4) UHFLO G600 VCC–pin voltage, 2.8V Check VSYN_1–line and R603 Check soldered joints G600 VC voltage at G600, N540 components ~2.25V (Mid CH) in VC–line Change G600 Does G600 oscillate at Change G600 any frequency Check...
  • Page 26 VHFLO Does the VCO oscillate at any N540 pin 12, 2.3V frequency ? Check VSYN_2 V621 collector, Check VSYN_1 supply N540pins 9, 16 and 19 2.8V supply voltage ~2.6V voltage line to V621 Check R623, R622 and Check VCP voltage line V621 base, 1.7V N540 pin 13 and 22, 5V soldered joints...

  • Page 27: Receiver Fault

    Receiver RSSI tuning working OK ? Fault Check AFC–line for N250 (R660) short circuits, if OK change voltage between 0.5 – 2.3V N250 Set SpectrumAnalyzer Frequency: 13 MHz Span: 10 kHz RESBW: 3 kHz Use sevice software to set AFC 13 MHz in midst, to MAX (L660)

  • Page 28: Transmitter Fault (1)

    NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Transmitter Fault (1) Original 08/98 Page 28...
  • Page 29 Transmitter TXLEV5 Z700 input, Check Z700 input for short Z700 input, loading > 1 M Ω circuits, if OK change Z700 SL: +2.5 dBm – +5.0 dBm Z700 output, Check Z700 output for short Z700 output, Check C700 loading > 1 M Ω circuits, if OK change Z700 SL: 1.0 –...

  • Page 30: Transmitter Fault (2)

    NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Transmitter Fault (3) Power Control TXLEV5 Transmitter Transmitter working OK Fault N250 H1, R740 Check TXC – line from N250 TXC – pulse OK pin 17, if OK change N250 N540 pin 33 and 34 pulses V700 anode, Check VSYN_1 voltage are about the same...
  • Page 31 NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Appendix A Picture 1. 13 MHz Main clock – signal Original 08/98 Page 31...
  • Page 32 NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Appendix B Picture 2. SCLK – signal Picture 3. SDATA – signal Picture 4. SENA1 – signal Original 08/98 Page 32...
  • Page 33 NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Appendix C Picture 5. TXQP, TXQN, TXIP and TXIN – signal Picture 6. TXP – signal Picture 7. VTX – signal Original 08/98 Page 33...
  • Page 34 NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Appendix D Picture 8. TXC – signal (TXLEV5) Picture 9. DET – signal(N620 pin 12) TXLEV5 Original 08/98 Page 34...

  • Page 35: Test Points

    NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Test points Test Name Log- Unit Description Point Lev- J100 SYNTHP Control line for VSYN_1 and VSYN_2. 2.85 J101 SLEEPX Control line for VCXO module supply. If low, 13 MHz clock is disabled. 2.85 J102 TXPWR Control line for VTX voltage...
  • Page 36 NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation J117 SIMCLK_O Clock line to Sim (3.25MHz) 2.85 J118 SIMRST_O Sim reset line 2.8/4 3.2/5 J119 VCOBBA 2.85 Supply voltage for analog part of COBBA J153 GND J154 MBUS Data I/O for external device and clock signal from flash prommer to MAD2 2.85 J220 V5V...
  • Page 37 NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions J231 MCURDX MCU read strobe 2.85 J232 VB Battery voltage J233 MCUWRX MCU write strobe 2.85 J234 ROM1SELX Flash memory select 2.85 J235 RAMSELX Sram memory select 2.85 J236 CCONCSX Chip select for CCONT from MAD2. Ac- tive low.
  • Page 38 NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation This page intentionally left blank. Original 08/98 Page 38...

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