Nokia NSB-1 Series Troubleshooting Instructions Download

Page: 14 / 24

PAMS

Technical Documentation

NSB–1/3

Troubleshooting Instructions

Page 14

Original 06/98

Instructions for TX troubleshooting

Use attenuator with P> 0dBm at input of RF–probe.
–TX on, burst mode.

TXQP:R501 0.8V

TXQN:R501 0.8V

TXIN:R504 0.8V
TXIP:R504 0.8V

TXP:J408 >2 V

TXC:J407 0.5–2 V

depending on

TX–level

Check PLUSSA

N401 pin 61 and 62:

f:400MHz

P:–19...–15dBm

CRFU (N402)

pin 7 and 9: f:400MHz

P:–19...–15dBm

Check CRFU (N402) pin

11: MID ch

P:–3...+5dBm

Goto Baseband

(BB)

troubleshooting

Goto

troublesh.

Check PLUSSA pins

2, 10 and 63:

2.8V (VTX)

pin 58: 1.5V (VREF)

Goto BB

troublesh.

PLUSSA (N401)

pin 8:

f:800MHz

P:–2...0dBm

Goto VHF VCO

troublesh.

section

Check C527, C545,

L501, L500, C519

and C518

CRFU (N402)

pin 13:2.8V

Goto BB

troublesh.

CRFU pin 16:

f:1480MHz P:+1–0dBm

Check CRFU pin

14:2.8V

Goto UHF VCO troublesh.

section

Change

PLUSSA

Change

CRFU

f:1880 MHz

Summary of Contents for NSB-1 Series

Page 1: ...NSB 1 3 Series Transceivers PAMS Technical Documentation Original 06 98 Troubleshooting Instructions ...

Page 2: ... or phone is jammed 8 Display Information Contact Service 9 The phone doesn t register to the network or phone doesn t make a call 9 Phone register failure 11 Instructions for RX troubleshooting 12 Instructions for TX troubleshooting 14 Fault finding chart for 13 MHz oscillator 16 Fault finding chart for VHF VCO 17 Fault finding chart for UHF VCO 18 SIM card is out of order 19 SIM Card failure 20 ...

Page 3: ... 1 Phone is totally dead 2 Flash programming does not work 3 Power does not stay on or the phone is jammed 4 Display information Contact Service 5 Phone does not register to the network or phone does not make a call 6 Plug in SIM card is out of order insert SIM card or card rejected 7 Audio fault 8 Charging fault The first thing to do is carry out a through visual check of the module En sure in pa...

Page 4: ... PWR switch is pressed or watchdog disable is grounded YES See section Power Doesn t Stay On YES Faulty circuit N100 NO Check X99 R103 Check UI module NO Failure in VBAT line Check X101 X102 Check VBATT at CCONT N100 pins 8 12 3 6V Flash programming doesn t work There are two possibilities to route programming voltage VPP If regulator N200 is used the programming voltage comes from the reg ulator ...

Page 5: ...t procedure is following 1 Connect the short circuit wire between the test points J206 and J207 2 Switch power on 3 If the voltage level in testpoint J205 is 2 8 V 1 the interface is OK If there is a short circuit the voltage level in testpoint J205 stays low and 32kHz square wave signal can be seen in the lines which are already tested This test can only be used to find short circuits not open pi...

Page 6: ...lure a MCU doesn t boot c serial clock line failure connect FBUS_TX X131 pin13 D200 pin104 FBUS_RX X131 pin12 D200 pin109 check also pullup and pulldown resistors R200 R201 R123 OK GND X131 pin 9 GND connect watchdog disable J114 to GND J113 OK OK Enable the selftest function of D200 by connecting shortcircuit between testpoints J206 and J207 Connect an oscilloscope to testpoint J205 and switch po...

Page 7: ...ation from the prommer is Algorithm file or alias ID don t find ID is un known etc YES Check control lines and upper data lines 15 8 of FLASH ROM1SelX Check pins of FLASH D210 Flash progrmming doesn t work YES If the fault information from the prommer is MCU flash Vpp error D210 pin13 C211 Vpp 2 8V Faulty component D210 or C211 YES NO Check UI connector X99 and zero ohm resistor Check output of re...

Page 8: ...8 seconds The power off function of CCONT can be prevented by connecting a short circuit wire from CCONT pin 29 to ground Power doesn t stay on or phone is jammed EEPROM D230 pin8 VBB 2 8V VVCXO 2 8V CCONT pin25 G703 NO YES J121 PURX 1 2 8V NO J201 sleepclk SLCLK square wave 32 kHz NO YES Faulty circuit N100 or over loaded PurX line check sleep clock circuitry YES MAD2 D200 pin 93 13 MHz sine wave...

Page 9: ...he network or the phone doesn t make a call the reason could be either the baseband or the RF part The phone can be set to wanted mode by WinTesla service software and determinate if the fault is in RF or in baseband part RF interface mea surements The control lines for RF part are supplied both the System Asic MAD2 D200 and the RFI Cobba N300 MAD2 handles digital control lines like synthe TxP etc...

Page 10: ...iginal 06 98 1 2 3 MAD2 pin 91 DSPXF J222 MAD2 pin 91 DSPXF J222 MAD2 pin 91 DSPXF J222 init initialize patch code download dsp constants download initialization done synchronization OK channel scan starts PSW search last PSW OK send RACH RACH OK go SDCCH imediate assigment OK ...

Page 11: ...ceiving slot AFC N300 pin 19 0 1 2 V typ during receiving slot NO Check N300 YES Analog data signal RxIP N300 pin 22 0 1 5 V DC during receiving slot Analog data signal RxIN N300 pin 23 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 NO Check N3000 if DC is failed Check RF part if benefit signal is failed YES DAX sig...

Page 12: ...53dBm Check filter Z604 max IL 3 2 output P 40dBm Check C603 and C604 Check CRFU pin 18 and 19 f 487MHz P 24dBm N N N Check RF connector X451 Check input of duplexer Replace if necessary Check input of Z604 and L611 P 37dBm Change filter Z604 Check input of C601 P 37dBm Check C600 R611 and measure CRFU pin 5 2 4V Check R612 and CRFU pin 12 1 2V Check V600 b 0 86V Check C623 and L610 N N Check CRFU...

Page 13: ...and C613 Check C602 C614 L608 and L609 2 7V VRX Check BB troublesh N N PLUSSA pin 51 and 52 f 87MHz P 26 29dBm Check R603 C617 C616 and L607 N Check AGC signal from J406 start of pulse 1 1V and center MID ch 1 3V Check C624 and R610 Goto BB troublesh N N Check C618 and PLUSSA pin 47 2 7V VRX Goto BB troublesh N Change filter Z606 Check J410 RXN and J411 RXP f 13MHz V 0 9V Check C641 and C640 Check...

Page 14: ...nd 62 f 400MHz P 19 15dBm CRFU N402 pin 7 and 9 f 400MHz P 19 15dBm Check CRFU N402 pin 11 MID ch P 3 5dBm Goto Baseband BB troubleshooting Goto BB troublesh Check PLUSSA pins 2 10 and 63 2 8V VTX pin 58 1 5V VREF Goto BB troublesh PLUSSA N401 pin 8 f 800MHz P 2 0dBm Goto VHF VCO troublesh section N N N N N Check C527 C545 L501 L500 C519 and C518 CRFU N402 pin 13 2 8V Goto BB troublesh CRFU pin 16...

Page 15: ...504 c VBAT b 1 7 3 8V Check N501 pin 3 V5V 5V N N Check N501 pin 1 0V during TXP pin 4 5V but during TX burst 4V N Check PLUSSA pin 12 0 5 1 8V pin 15 2 8V Check PA N500 pin 9 same as J404 pin 2 and 8 VBAT pin 12 and 13 VBAT Change PA No signal to X451 PCB is bad No signal to J400 X451 is bad N N Goto BB troublesh Check input of Z511 VBAT N N Goto BB troublesh Change Z511 TXP J408 2 8 V TXC J407 0...

Page 16: ... VVCXO signal from C721 2 8V Goto BB troublesh N N Check AFC signal from C720 1 1V Goto BB troublesh N Check RFCLK signal from L701 f 13MHz P 5dBm Vpp 0 84V Check C722 Check V710 c 13MHz Vdc 0 95V Vpp 0 8V b 13MHz Vdc 0 6V Vpp 0 1V Check R717 and C721 2 8V Check R707 R706 and C760 N N Check PLUSSA N401 pin 54 SCLK 2 8V pin 55 SDATA 2 8V pin 56 SENA 2 8V SENA is 0 during SCLK and SDATA Goto BB trou...

Page 17: ...8 2 8V Goto BB troublesh N Check R708 C714 and C716 PLUSSA pin 18 PD 2 2V N Check C707 R712 R729 Voltage in R729 2 25V Signal VSYN_D troublesh Check R715 and R716 2 8V N Goto BB troublesh Check R715 R716 C7 28 and C735 PLUSSA pin 9 22 and 25 2 75V Check PLUSSA N401 pin 54 SCLK 2 8V pin 55 SDATA 2 8V pin 56 SENA 2 8V SENA is 0 during SCLK and SDATA N Goto BB troublesh Change PLUSSA N Change module ...

Page 18: ...Check CRFU2a pin 16 Same as PLUSSA pin 24 P 0dBm CRFU2a pin 1 and 14 2 8V N Check C774 R760 R758 C773 and R759 Check V720 c 2 6V CRFU2a pin 1 and 14 2 8V VSYN_A missing Goto BB troublesh N Check connection of R701 and C700 2 7V Check R702 R703 R704 C703 and C702 Check control signal from R703 RX 1 4 3 3V TX 1 7 3 5V This is also visible at PLUSSA pin 27 Check C671 C704 C761 and C706 Goto BB troubl...

Page 19: ...witched on and if the BSI line X101 1 is grounded by resistor all the used lines VSIM RST CLK DATA rise up four times Thus Insert SIM card faults can be found without SIM card The fault information Card rejected means that ATR message the first message is always sent from card to phone is sent from card to phone but the message is somehow corrupted data signal levels are wrong etc or factory set v...

Page 20: ...pecification VSIM 2 8 V min with 3 V SIM card VSIM 4 5 V min with 5 V SIM card NO faulty circuit N100 CCONT YES The ATR data can be seen at pin 43 CCONT N100 NO Check X150 R101 YES The ATR data can be seen at pin 120 MAD2 D200 NO Check N100 YES SIMIOControl line N100 pin 36 is 1 during the ATR message NO Check D200 YES Check D200 VSIM DATA RESET and CLOCK lines at Sim card reader X150 rises up to ...

Page 21: ...38 of MAD2 D200 is 1 MHz square wave 2 8 Vpp NO Check N300 Cobba Frequency at pin 139 of MAD2 D200 is 8 kHz square wave pulses 2 8 Vpp YES NO Check N300 Cobba YES Uplink microphone is broken Voltage at pin 6 of X131 is 1 8V Voltage at pin 7 of X131 is 0 3V NO YES during a call YES DC voltage at pins 59 and 60 of N300 is 1 4 V during a call NO Check N300 Cobba YES Analog audio signal few millivolts...

Page 22: ...ailure 2 Check D200 MAD2 Digital PCM data at pin 52 of Cobba N300 during a call NO Downlink earphone is broken YES YES DC voltage at pins 5 and 6 of N300 is 1 4 V during a call NO Check N300 Cobba YES Analog audio signal some ten millivolts at pins 5 and 6 of N300 during a call NO Check N300 Cobba ...

Page 23: ... Voltage level at pin 62 of CCONT N100 is about 0 8 V BSI resistor 39K when power is connected Depends about BSI resistor value NO Check X101 R107 YES Voltage level at pin 63 of CCONT N100 is about 0 5 V when power is connected BTEMP resistor value should be 47 k NO Check X101 R107 YES 32 Hz square wave frequency at pin 7 of CHAPS N110 NO Check N100 Check N110 YES Voltage levels at pins 5 and 12 o...

Page 24: ...PAMS Technical Documentation NSB 1 3 Troubleshooting Instructions Page 24 Original 06 98 This page intentionally left blank ...

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