Related Manuals for Nokia NSB-1 Series
Summary of Contents for Nokia NSB-1 Series
- Page 1 PAMS Technical Documentation NSB–1/3 Series Transceivers Troubleshooting Instructions Original 06/98...
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Page 2: Table Of Contents
NSB–1/3 PAMS Troubleshooting Instructions Technical Documentation CONTENTS Page No Trouble Shooting ........Phone is totally dead . -
Page 3: Trouble Shooting
NSB–1/3 PAMS Technical Documentation Troubleshooting Instructions 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 4: Phone Is Totally Dead
NSB–1/3 PAMS Troubleshooting Instructions Technical Documentation Phone is totally dead This means that phone doesn’t take current at all when the power switch is pressed or when the watchdog disable pin (X001 pin 11) is grounded. Used battery voltage must be higher than 3.0 V. Otherwise the hardware of CCONT (N100) prevents totally to switch power on. - Page 5 NSB–1/3 PAMS Technical Documentation Troubleshooting Instructions In cases that the flash programming doesn’t succeed there is a possibility to check short circuits between the memories and the MCU (MAD2). This test is useful to do, when the fault information is: MCU doesn’t boot, Serial clock line failure or Serial data line failure.
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Page 6: Flash Programming (1)
NSB–1/3 PAMS Troubleshooting Instructions Technical Documentation Flash Programming (1) Flash programming doesn’t work If the fault information from the prommer is: a) MCU doesn’t boot b) serial data line failure c) serial clock line failure connect: connect watchdog disable (J114) to GND (J113) EEPROM (D230) pin8 (VBB) 2.8V check VVCXO 2.8V (G703, C721) -
Page 7: Flash Programming Failure (2)
NSB–1/3 PAMS Technical Documentation Troubleshooting Instructions Flash Programming failure (2) Flash progrmming doesn’t work If the fault information from the prommer is: External RAM fault Check pins of SRAM (D221) Flash progrmming doesn’t work Check control lines of SRAM: RAMSelX ... If the fault information from the prommer is: Algorithm file or alias ID don’t find, ID is un- known etc. -
Page 8: Power Doesn't Stay On, Or Phone Is Jammed
NSB–1/3 PAMS Troubleshooting Instructions Technical Documentation Power doesn’t stay on, or phone is jammed If this kind of fault has come after flash programming, there are most probably open pins in ICs. The soldered joints of ICs: D200 (MAD2), D210 (FLASH), N100 (CCONT), D221 (SRAM) are useful to check at first. -
Page 9: Display Information: Contact Service
NSB–1/3 PAMS Technical Documentation Troubleshooting Instructions 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 started to excute from flash. - Page 10 NSB–1/3 PAMS Troubleshooting Instructions Technical Documentation constants download init patch code initialize download initialization done MAD2 pin 91 (DSPXF) J222 search last PSW channel synchronization scan starts MAD2 pin 91 (DSPXF) J222 go SDCCH send RACH imediate assigment RACH OK MAD2 pin 91 (DSPXF) J222 Original 06/98...
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Page 11: Phone Register Failure
NSB–1/3 PAMS Technical Documentation Troubleshooting Instructions Phone register failure Phone doesn’t register to the network phone doesn,t make a call Check Analog supply voltage VCOBBA is >2.7 V N100 at pin 7,12 ... of Cobba (N300) Check Analog reference voltage Vref is 1.5 V R308 at pin 9 of Cobba (N300) Supply voltage VCP (N100 pin 32) >... -
Page 12: Instructions For Rx Troubleshooting
NSB–1/3 PAMS Troubleshooting Instructions Technical Documentation Instructions for RX troubleshooting Use high impedance RF–probe and calibrate your phone with functional phone. Note! Power level measurement accuracy with RF–probe is 2 dB. Use WinTesla to set RX continuous mode and RX on. Apply 1960 MHz –50dBm signal to external RF–connector... - Page 13 NSB–1/3 PAMS Technical Documentation Troubleshooting Instructions Check filter Z621 CRFU pin 25 and 26: Change (max IL 4.5dB) f:487MHz P:–36dBm Z621 Check L601,L602,C609 Goto BB and C611: V:2.7V troublesh. (VRX) CRFU pin 2 and 3: CRFU pin 1:2.7V Check VHF VCO f:87MHz troublesh.
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Page 14: Instructions For Tx Troubleshooting
NSB–1/3 PAMS Troubleshooting Instructions Technical Documentation Instructions for TX troubleshooting Use attenuator with P> 0dBm at input of RF–probe. –TX on, burst mode. TXQP:R501 0.8V Goto Baseband TXQN:R501 0.8V (BB) TXIN:R504 0.8V troubleshooting TXIP:R504 0.8V TXP:J408 >2 V Goto TXC:J407 0.5–2 V depending on troublesh. - Page 15 NSB–1/3 PAMS Technical Documentation Troubleshooting Instructions Check filter Z503 Check IL of Change output from C561: Z503 Z503 P:–7...+4dBm max 4.2 dB f:MID ch Check PA pin 6: Check IL of filter Z505 Change Z505 f: MID ch max 3.5 dB P:+3...+8dBm Check TX buffer Goto BB...
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Page 16: Fault Finding Chart For 13 Mhz Oscillator
NSB–1/3 PAMS Troubleshooting Instructions Technical Documentation Fault finding chart for 13 MHz oscillator Check AFC–signal PLUSSA pin21: Goto BB from R714 and 13MHz troublesh. C720:1.1V. Check Vpp:0.6V VVCXO–signal from C721:2.8V. Check Goto BB AFC–signal from troublesh. C720:1.1V Check Check C722. Check V710; RFCLK–signal from c:13MHz Vdc:0.95V Vpp:0.8V Check R717 and C721:2.8V... -
Page 17: Fault Finding Chart For Vhf Vco
NSB–1/3 PAMS Technical Documentation Troubleshooting Instructions Fault finding chart for VHF VCO –RX cont mode. Check PLUSSA pin 8: C709 800MHz P:0dBm Check Goto BB VSYN_A–signal troublesh. from R708:2.8V Check R708,C714 and C716. Check PLUSSA (N401) pin 54 (SCLK):2.8V PLUSSA pin 18 Goto BB pin 55 (SDATA):2.8V (PD):2.2V... -
Page 18: Fault Finding Chart For Uhf Vco
NSB–1/3 PAMS Troubleshooting Instructions Technical Documentation Fault finding chart for UHF VCO –RX cont mode. PLUSSA pin 24: RX:f:1443.2–1502.8MHz Check C775 P:0dBm and C710 TX:1450.2–1509.8MHz P:–1dBm Check Check CRFU2a CRFU2a pin Goto BB C671,C704,C761 pin 16: Same as 1 and troublesh. -
Page 19: Sim Card Is Out Of Order
NSB–1/3 PAMS Technical Documentation Troubleshooting Instructions SIM card is out of order The hardware of the SIM interface from MAD2 (D200) to the SIM connec- tor (X302) can be tested without SIM card. When the power is switched on and if the BSI line (X101;1) is grounded by resistor, all the used lines (VSIM, RST, CLK, DATA) rise up four times. -
Page 20: Sim Card Failure
NSB–1/3 PAMS Troubleshooting Instructions Technical Documentation SIM Card failure Insert SIM card fault Check Voltage level < 1.5 V R107,R104,X101 at pin 95 of D200 when C120, C121 BSI resistor is connected VSIM, DATA, RESET and CLOCK lines Check at Sim–card reader (X150) rises up to 5V SIM card and SIM reader after power on connectors... -
Page 21: Audio Failure (1)
NSB–1/3 PAMS Technical Documentation Troubleshooting Instructions Audio failure (1) Uplink (microphone) and downlink (earphone) are broken Voltage at pin 107 of MAD2 (D200) Check is 2.8 V (without external audio de- R130,R155, vices) HOOKDET R300,C300 Voltage at pin 108 of MAD2 (D200) Check is 2.8 V (without external audio de- R154,R301,,R302,... -
Page 22: Audio Failure (2)
NSB–1/3 PAMS Troubleshooting Instructions Technical Documentation Audio failure (2) Downlink (earphone) is broken Digital PCM data at pin 52 of Cobba (N300) Check during a call D200 (MAD2) Check DC voltage at pins 5 and 6 of N300 (Cobba) N300 is 1.4 V during a call Check Analog audio signal (some ten millivolts) at pins 5 and N300 (Cobba) -
Page 23: Charger Failure
NSB–1/3 PAMS Technical Documentation Troubleshooting Instructions Charger failure Nothing happens when charger is connected Voltage level at pin 60 of CCONT (N100) Check is higher than 0.4 V when charger is con- X131, F100, L109 nected R127,R134,R146, C140 Check N100 Display Information: Not charging Voltage level at pin 62 of CCONT (N100) Check... - Page 24 NSB–1/3 PAMS Troubleshooting Instructions Technical Documentation This page intentionally left blank. Original 06/98 Page 24...