Nokia NSE-6 SERIES Disassembly & Troubleshooting Instructions Download Page 20 | Manualshive

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Nokia NSE-6 SERIES Disassembly & Troubleshooting Instructions Download Page 20

PAMS

Technical Documentation

NSE–6

Disassembly & Troubleshooting Instructions

Page 20

Original 08/98

Audio failure

Uplink (microphone) and downlink
(earphone) are disfunctional

Voltage at HOOKDET (C260)
2.8 V (without headset)

Voltage at HEADDET (C261)
2.8 V (without headset)

YES

YES

NO

YES

Frequency at J257 is square
wave 8 kHz 2.8 Vpp

Check R259, R260

NO

Check Cobba (N250)

NO

Check R256, R257, R261

Uplink (microphone) is
disfunctional

Voltages at J261 and J262 are

1.8 V and 0.3 V

during call

DC voltage at C262 and C263
(on Cobba side) are 1.4 V
during a call

YES

YES

NO

YES

Analog audio signal (few mV) at
C262 and C263 (on Cobba side)
during a call

YES

Check slide connector, V701, V250..
If OK, check that micbias line
(R267 upper side) is ”1” during call

NO

Check Cobba (N250)

NO

Check C262, C263 and PCB
routings

Check Cobba (N250)

Change slide

NOT OK

Downlink (earphone) is
disfunctional

DC voltage at C291 and C292
are 1.4 V during a call

YES

YES

Analog audio signal (some ten mV)

at C291 and C292 during a call

NO

NO

Check Cobba (N250)

Check Cobba (N250)
and MAD2 (D200)

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Summary of Contents for NSE-6 SERIES

Page 1: ...NSE 6 Series Transceivers PAMS Technical Documentation Original 08 98 Disassembly Troubleshooting Instructions ...

Page 2: ...ing failure 4 12 Power doesn t stay on or phone is jammed 13 Display Information Contact Service 14 The phone doesn t register to the network or phone doesn t make a call 15 Phone register failure 17 SIM card related failures 18 SIM Card failure 19 Audio failure 20 Charger failure 21 Receiver Fault 1 22 Receiver Fault 2 23 Receiver Fault 3 24 Receiver Fault 4 25 Receiver Fault 5 26 Receiver Fault ...

Page 3: ...er screws 2 pcs Step 1 Push c cover edge outwards to re lease it behind locking snap Step 2 Lift up the edge to release c cover Step 3 Repeat the operation on both sides Step 1 Open slide cover Step 2 Push slide edge outwards Step 3 Lift slide up from the edge and slide will be released NOTE When assembling the screws use 17 Ncm torque Remove c cover by lifting up rear and pulling cover out ...

Page 4: ...ep 1 Lift slide frame from bott tom and loosen it from a cover Step 2 Remove slide frame UI board will follow Parts can be separated Remove shield screws 2 pcs Remove shield 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 ...

Page 5: ...bleshooting purposes in some supply voltage and signal lines Alignments Within alignment those parameters are adjusted that cannot be set accurate enough by design because of component tolerances Due to use of 5 resis tor 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...

Page 6: ...ng section 1 Phone is totally dead 2 Flash programming doesn t work 3 Power doesn t stay on or the phone is jammed 4 Display information Contact Service 5 Phone doesn t register to the network or phone doesn t make a call 6 SIM card related failures insert SIM card or card rejected 7 Audio fault 8 Charging fault The first thing to do is carry out a thorough visual check of the module Ensure in par...

Page 7: ...CCONT N100 See section Power doesn t stay on Check PWR switch to CCONT line R341 R118 Faulty CCONT N100 Yes No Yes Yes Yes No No No Yes Flash programming doesn t work The flash programming can be done via panel connector X001 or via ded icated PCB pads In production the first programming is done via panel connector After this the panel connector is cut away thus the program ming must be done via P...

Page 8: ...he test procedure is following 1 Connect testpoint J229 to ground 2 Switch the power on 3 If the voltage level in testpoint J225 is 2 8 V 1 the interface is OK If there is a short circuit the voltage level in testpoint J225 stays low and 32kHz square wave signal can be seen in the lines which are already tested It must be remembered that this test can only find short circuits not open pins In addi...

Page 9: ... X001 pin 3 R115 Check also pullup and pulldown resistors R115 R201 R215 GND X001 pin 7 GND Check C213 R213 RFC C664 13 MHz 800 mV min Check buffer V660 and VCTCXO G660 See section Phone is totally dead J228 sleep clock SCLK square wave 32 kHz Check sleep clock circuitry B101 R154 Faulty circuit N100 or overloaded PurX line Enable the selftest function of D200 by connecting J229 to ground Connect ...

Page 10: ...re could be open joints in SRAM Flash programming doesn t work via panel connector If the fault information is Algorithm file or alias ID don t find ID is unknown etc Check control lines of Flash D220 ROM1SelX J234 Fault could be open joints in Flash or In upper data lines 15 8 Flash programming doesn t work via panel connector If the fault information is MCU flash Vpp error Check connections betw...

Page 11: ...ck also pullup and pulldown resistors R115 R201 R215 GND X001 pin 7 GND Check C213 R213 RFC C664 13 MHz 800 mV min Check buffer V660 and VCTCXO G660 VBAT is correct 3 6 V J228 sleep clock SCLK square wave 32 kHz Check sleep clock circuitry B101 R154 Faulty circuit N100 or overloaded PurX line Enable the selftest function of D200 by connecting testpoint J229 to ground Connect oscilloscope to testpo...

Page 12: ...ints in SRAM Flash programming doesn t work If the fault information is Algorithm file or alias ID not found ID is unknown etc Check control lines of Flash D220 ROM1SelX J234 Fault could be open joints in Flash or In upper data lines 15 8 Flash programming doesn t work If the fault information is MCU flash Vpp error Vpp 2 8 V C212 Check components C212 R211 Vpp 2 8 V in J221 Check UI connector X30...

Page 13: ... 8 seconds The pow er off function can be prevented by connecting WDDIS J111 to ground Power doesn t stay on or phone is jammed CCONT watchdog is served J236 pulses 1 0 every 8 sec Connect J111 WDDIS to GND VBB C107 upper side 2 8 V VXO C149 upper side 2 8 V Software is able to run If power is switched off after few seconds check BSI and BTEMP lines Master reset PURX J227 2 8 V RfClk R213 lower si...

Page 14: ...le power up start up tests and ones that can be executed with connected PC The tests and included items are as follows 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...

Page 15: ...e fault is in RF or in baseband RF interface measurements The control lines for RF are supplied both by the System Asic inside of MAD2 D200 and the RFI inside of Cobba N250 MAD2 handles digital control lines like SENA TxP etc and Cobba handles analog control lines like AFC TxC etc The DSP software is constructed so that opera tion states of DSP MAD2 can be seen in external flag DSPXF J222 After po...

Page 16: ...nstructions Page 16 Original 08 98 1 DSP constants download Iinitialization done Patch code download init inialize channel scan starts 2 Sycronization OK Last PSW OK PSW search Send RACH RACH OK transmitter on Go SDCCH immediate assignment OK phone in serve state 3 ...

Page 17: ...lines RxC R263 upper side 0 2 3 Vmax AFC R660 upper side 0 1 2 Vtyp during receiving slot Analog data signals RxIP and RxIN R544 upper sides 0 1 5 V DC during receiving slot Used benefit signal is biased to DC and its amplitude is 50 mVpp nominal and frequency is 13 MHz RF control lines TxC R740 upper side 0 2 3 Vmax TxP Summa N540 pin 32 0 2 8 V during transmitting slot Analog data signals TxIN T...

Page 18: ...e 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 EEPROM are not correct Insert SIM card failure Voltage 1 5 V at C120 when BSI resistor is connected Check R120 R122 C120 Battery connector VSIM DATA RESET and CLOCK lines J252 J116 J118 J117 rise up to 5V after power on Check SIM card ...

Page 19: ...ginal 08 98 SIM Card failure Card rejected fault VSIM J252 2 8 V min with 3 V SIM card 4 5 V min with 5 V SIM card CCONT N100 faulty The ATR data can be seen at J116 YES YES NO YES SIMIOControl line J115 is 1 during the ATR message Check R124 X451 NO Check MAD2 D200 NO Check MAD2 D200 YES ...

Page 20: ...nal Voltages at J261 and J262 are 1 8 V and 0 3 V during call DC voltage at C262 and C263 on Cobba side are 1 4 V during a call YES YES NO YES Analog audio signal few mV at C262 and C263 on Cobba side during a call YES Check slide connector V701 V250 If OK check that micbias line R267 upper side is 1 during call NO Check Cobba N250 NO Check C262 C263 and PCB routings Check Cobba N250 Change slide ...

Page 21: ...arging Voltage at C120 is about 0 8 V when the power is connected BSI resistor should be 39 K YES NO Check R120 R122 battery connector Voltage at C121 is about 0 5 V when the power is connected BTEMP resistor should be 47K YES 32 Hz square wave at Chaps N101 pin 7 Voltage levels at Chaps N101 pins 5 and 12 same as VB J232 Voltage levels at Chaps N101 pins 5 and 12 rise when charger is connected YE...

Page 22: ...8 voltage line Check soldered joints of N500 and R504 if OK change R504 Check components in line out of pin 23 if OK change N500 N500 pin 23 loading 10 k Ω N500 pin 16 1 5V N500 pin 20 loading 8k2 Ω Z501 input SL 44 dBm Z501 input loading 1 MΩ Check soldered joints if OK change Z501 Check C503 L501 soldered joints if OK change it Z501 output SL 47 dBm Z501 output loading 1 M Ω Check L500 C501 C502...

Page 23: ...0 Z502 input 1 and 2 SL 30 Z502 input 1 and 2 loading 1 M Ω Check input for short circiuts if OK change Z502 Check components in input line to Z502 Z621 output SL 43 Z502 output 1 and 2 loading 1 M Ω Check output for short circiuts if OK change Z502 Check components in output line Check soldered joints at N540 if OK change Z502 N540 pin 37 and 38 SL 43 dBm N540 pin 35 2 8V Check soldered joints of...

Page 24: ...rol voltage from COBBA pin 18 Change N540 VHFLO Z540 input SL 26 dBm Check R540 and soldered joints Z540 output SL 28 dBm Check soldered joints if OK change Z540 N540 pin 26 SL 36 dBm and pin 25 SL 33 dBm N540 pin 25 and 26 DC level 1 4V Change N540 Check R541 and R542 N540 pin 23 and 24 SL 29 dBm Change N250 Cobba N540 pin 23 and 24 DC level 1V Change N540 YES YES YES YES YES YES YES YES YES YES ...

Page 25: ...k soldering joints at N540 G600 N540 pin 9 16 and 19 2 8V Check VSYN_2 and CNTVR3 control J100 Check VCP voltage from CCONT pin 32 N540 pin 41 1 5V Check VREF_1 line N540 pin 42 loading 15 k Ω Check soldering joints at N540 and R543 if OK change R543 SCLK SDATA SENA1 working OK Check SCLK SDATA SENA1 lines from MAD Change N540 YES YES YES YES Change G600 YES YES YES YES N540 pin 13 and 22 5V YES N...

Page 26: ...ge N540 Check VSYN_2 supply voltage Check VCP voltage line V621 collector 2 6V V621 base 1 7V V621 emitter 1V Check V620 L629 C622 C623 Check VSYN_1 supply voltage line to V621 Check R623 R622 and soldered joints V621 emitter loading 330 Ω if OK change V621 NO NO NO NO NO NO NO YES YES YES YES YES YES N540 pin 12 2 3V N540pins 9 16 and 19 2 8V N540 pin 13 and 22 5V ...

Page 27: ...age between 0 5 2 3V Check AFC line for short circuits if OK change Set SpectrumAnalyzer Frequency 13 MHz Span 10 kHz RESBW 3 kHz 13 MHz in midst L660 Use sevice software to set AFC to MAX AFC voltage 2 3V Main clock 13 MHz Check R660 and C660 if OK change N250 Change G660 YES YES YES NO NO NO NO NO NOTE If DSP in MAD does not work properly supply voltages stays down N250 ...

Page 28: ...ge N540 N500 pin 2 and 3 116 MHz SL 6 dBm N500 pin 2 and 3 loading 1M Ω Check N500 pin 2 and 3 for short circuits if OK change N500 Check C760 C761 L760 L761 R760 R761 if OK change N500 N500 pin 13 RX Continous SL 28 dBm UHFLO N500 pin 30 SL 2 5 dBm N500 pin 1 and 29 2 8V Check VTX supply voltage from CCONT N500 pin 16 1 5V Check VREF_2 line J518 N500 pin 20 loading 8k2 Ω Check R507 and soldered j...

Page 29: ...f OK change Z700 Change Z700 N700 pin 1 SL 1 0 3 0 dBm Check C711 N700 pin 4 SL 35 dBm N700 pin 3 3 6V Check VBATT connections to N550 N700 pin 2 power control pulse Check soldered joints at N700 and N540 if OK change N540 Check soldered joints at N700 if OK change N550 Duplexer TX pin SL 34 5 dBm Check N701 Also check for short circuits if OK change Z500 Check C784 if OK change Z500 RF connector ...

Page 30: ...0 TXC pulse OK Transmitter Fault Check TXC line from N250 pin 17 if OK change N250 N540 pin 33 and 34 pulses are about the same V700 anode DC voltage 0 8V Check VSYN_1 voltage through R704 R705 and R706 N540 pin 12 loading 4 k Ω Check C743 if OK change N540 Check C709 R707 and R708 if OK change V700 TXC pulse Oscilloscope picture in Appendix D YES YES YES YES NO NO NO NO NO ...

Page 31: ...PAMS Technical Documentation NSE 6 Disassembly Troubleshooting Instructions Page 31 Original 08 98 Appendix A Picture 1 13 MHz Main clock signal ...

Page 32: ...PAMS Technical Documentation NSE 6 Disassembly Troubleshooting Instructions Page 32 Original 08 98 Appendix B Picture 2 SCLK signal Picture 3 SDATA signal Picture 4 SENA1 signal ...

Page 33: ...PAMS Technical Documentation NSE 6 Disassembly Troubleshooting Instructions Page 33 Original 08 98 Appendix C Picture 5 TXQP TXQN TXIP and TXIN signal Picture 6 TXP signal Picture 7 VTX signal ...

Page 34: ...PAMS Technical Documentation NSE 6 Disassembly Troubleshooting Instructions Page 34 Original 08 98 Appendix D Picture 8 TXC signal TXLEV5 Picture 9 DET signal N620 pin 12 TXLEV5 ...

Page 35: ...ternal charger 1 Hz for stand by charging 32 Hz for continuous charging ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ J109 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ VIN ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 0 ÁÁÁ ÁÁÁ ÁÁÁ 15 ÁÁÁ ÁÁÁ ÁÁÁ Vpe ak ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Charging voltage ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ J110 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ VPP ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 2 8 ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 3 2 ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ V ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ...

Page 36: ...ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 0 8 2 85 ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ V ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Interrupt line from CCONT to MAD2 Used for charger indication and RTC alarm indication If high an interrupt is generated ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ J224 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ VSRM ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 5 2 ÁÁÁ ÁÁÁ ÁÁÁ 5 5 ÁÁÁ ÁÁÁ ÁÁÁ V ÁÁÁÁÁÁÁÁÁÁÁÁ...

Page 37: ...ÁÁ 5 5 ÁÁÁ ÁÁÁ ÁÁÁ V ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Supply voltage for flash programming regulator N201 from CCONT N100 ÁÁÁÁ ÁÁÁÁ J254 ÁÁÁÁÁÁ ÁÁÁÁÁÁ SGND ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ 0 ÁÁÁ ÁÁÁ 0 ÁÁÁ ÁÁÁ V ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ J254 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ J255 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁ...

Page 38: ...PAMS Technical Documentation NSE 6 Disassembly Troubleshooting Instructions Page 38 Original 08 98 This page intentionally left blank ...

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