PAMS Technical Documentation NSE–8/9 Series Transceivers Troubleshooting Issue 1 07/99
PAMS NSE–8/9 Troubleshooting Technical Documentation CONTENTS Abbreviations in fault finding charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Baseband Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1. Phone is totally dead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2. Flash programming doesn’t work . . . . . . . . . . . . . . . . . . . . . . . . . 4.3. Power doesn’t stay on or phone is jammed . . . . . .
PAMS NSE–8/9 Technical Documentation Troubleshooting Abbreviations in fault finding charts BB Baseband DC Direct Current ESD Electro Static Dicharge f: Frequency of signal (measured with Spectrum Analyzer) LO Local Oscillator P: Power of signal –dB) (measured with Spectrum Analyzer) PA Power Amplifier PCB Printed Circuit Board PLL Phase Locked Loop RF Radio Frequency RX Receiver T: Time between pulses TX Transmitter UHF Ultra High Frequency V: Voltage of signal (measured wit
PAMS NSE–8/9 Troubleshooting Technical Documentation Baseband Trouble Shooting The following hints should facilitate finding the cause of the problem when the circuitry seems to be faulty. This troubleshooting instruction is divided into the following section. 4.1 Phone is totally dead 4.2 Flash programming doesn’t work 4.3 Power doesn’t stay on or phone is jammed 4.4 Display Information: Contact Service 4.5 The phone doesn’t register to the network or phone doesn’t make a call 4.
PAMS NSE–8/9 Troubleshooting Technical Documentation 4.1. Phone is totally dead This means that the phone doesn’t take current at all when the power switch S416 is pressed or when the watchdog disable pin (X201 pin 11) is grounded. Used battery voltage must be higher than 1,9 V. Otherwise the hardware of the switcher V105 and CCONT (N100) will not operate reliable. Phone is totally dead. Measure Vdc_out voltage at Vibra pad E103 Measure Vb voltage at C115 Yes > 1,9 V > 3.
PAMS NSE–8/9 Troubleshooting Technical Documentation Switcher Check voltage at C109 Switcher feedback somehow faulty check circuitry arround V105, V108, V109 No less than 4,8 V > 3.1 V Check L103 and capacitors C111 to C113 Yes No Check voltage at pin 3 of V105 Measure voltage at V105 pin 15 Yes < 0,4 V No Yes Check L102, V101 and circuitry arround V109 app. 1.25 V No Check capacitors C109 to C113 and coil L103 Check feedback circuitry R102, R105, R112 and arround V108.
PAMS Technical Documentation NSE–8/9 Troubleshooting In production, the first programming is done via panel connector X201. After this, the panel connector is cut away, thus other flash programming must be done via service interface J100 - J105. The main differences between these are: a) FLASH programming voltage is produced different way. b) Signal routings are different. The fault finding diagrams for flash programming are shown in Figure 4–3, Figure 4–4 and Figure 4–5.
PAMS NSE–8/9 Troubleshooting Technical Documentation FLASH Programming doesn’t work. Check if fault information from Prommer is one of the following: a) MCU doesn’t boot b) serial dataline failure c) serial clock line failure failure is one of the above mentioned? No A Yes Check WDDIS line: X201 pin 11 –> R424 Connect watchdog disable (WDDIS R424 ) to GND. No C Yes C117 (Vbb) is typ 2.8V and C102 (VXO) is typ 2.8V ? Line OK? No See section ”Phone is totally dead”.
PAMS NSE–8/9 Troubleshooting Technical Documentation B Check that the following lines are OK: FCLK (M–BUS) line: J102, X201 pin 3 –> C306 FTX (fbus_tx) line: J103, X201 pin 1 –> C314 FRX (fbus_rx) line: J104, X201 pin 2 –> C305 (value on all should be 100 ohm) Check also pull–up and –down resistors: R309, R310, R311 GND: J100, X201 pin 7 –> GND OK? No Repair or defect PCB Yes Check Service tool TDS–7 & MJS–13 and connections Check that phone is responding to flash programming tool as shown in fig.
PAMS NSE–8/9 Troubleshooting Technical Documentation A External RAM fault? No ID problem? Yes Yes Check pins of SRAM (D302) Check control lines of SRAM:”MEMC(4:0)” NO MCU FLASH Vpp Error No Check type of FLASH Check soldering of FLASH Yes Unknown fault. Check for noise on communication lines Try phone totally dead. Flashing from X201? No Check connection from J105 to R307 Voltage at R307 >1.7V & <3.
PAMS Technical Documentation NSE–8/9 Troubleshooting 4.3. 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: D300 (MAD2Pr1), D301 (FLASH), N100 (CCONT), D302 (SRAM) are useful to check at first. Normally the power will be switched off by CCONT (N100) after 32 seconds, if the watchdog of the CCONT can not be served by software. Check watchdog is updated.
PAMS NSE–8/9 Troubleshooting Technical Documentation Power doesn’t stay on or phone is jammed Is C109 voltage <4,2V or >3,1V ? No Switcher Yes Check that CCONTCSX J337 is pulsing and that PWRON (R413) is high. No Connect R424 to GND Check VBB typ 2.8V at C117 and VXO typ 2.8V at C102 and that they are stable Yes C Yes Software is able to run in phone, acknowledging watchdog. If power is switched off after a few seconds, check circuit arround V109.
PAMS NSE–8/9 Troubleshooting Technical Documentation 4.4. 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. If any of selftests is failed, contact service information will be shown on display. a) Check Selftest status in WinTesla b) Check that content of EEProm D303 and flash D301 is correct c) 4.5.
PAMS NSE–8/9 Troubleshooting Technical Documentation 1 dsp constants download init initialize patch code download MAD2Pr1 pin D8 (DSPXF) initializatio done n J308 The states of DSP after power on Figure 4–8 2 PSW search last PSW OK channel scan starts MAD2Pr1 pin D8 (DSPXF) synchronizatio OK n J308 The states of DSP after power on Figure 4–9 3 send RACH RACH OK go SDCCH imediate OK assigment MAD2Pr1 pin D8 (DSPXF) J308 The states of DSP after power on Figure 4–10 Page 14 Issue 1 07/
PAMS NSE–8/9 Troubleshooting Technical Documentation Phone doesn’t register to the network or phone doesn’t make a call Analog supply voltage to COBBA is > 2.7V (C218) and stable ? No Check N100 Yes Analog reference to COBBA is 1.5V (C205) and stable ? No Check R207, C205, C123 and C124. Check Vref and load on it Yes Check: Supply voltage Vcp (C132) > 4.8V Supply voltage VRX_1 (C101) > 2.7V Supply voltage VRX_2 (C104) > 2.7V Supply voltage VSYN_2 (C103) > 2.
PAMS NSE–8/9 Troubleshooting Technical Documentation D RF control lines: RxC (R725) 0–>2.3Vmax during receiving slot AFC (C747) 0– 1.2V typ. during receiving slot OK? No Check N200 Yes Analog data signals: RxIP & RxIN 0–>1.5V DC during receiving slot Recieved signal is biased to DC, amplitude 50mVpp nominal and frequency 13MHz OK? No Check N200 if DC fail or RF part Yes RF control lines: TxC (C700) 0–>2.3Vmax during transmit slot TxP (R706) 0–>2.
PAMS Technical Documentation NSE–8/9 Troubleshooting 4.6. Plug in SIM card is out of order ( insert SIM card or card rejected). The hardware of the SIM interface from MAD2Pr1 (D300) to the SIM connector (X100) can be tested without SIM card. When the power is switched on, all the used lines (VSIM, RST, CLK, DATA) rises up to 3V one time and 5V tree times (see fig 5). Thus ”Insert SIM card” faults can be found without SIM card.
PAMS NSE–8/9 Troubleshooting Technical Documentation Insert SIM card fault VSIM (C137), DATA_0 (C140), SIMRST_0 (C139) and SIMCLK_0 (C138) lines rise up to 3V on the first puls and then 5V the next tree pulse after power on with out simcard Yes Check soldring and springs on X100 No SIMIF(4:0) lines SIMPWR (J321), SIMCardData (J325), SIMCardRst (J324), SIMCLK (J323), SIMIOC (J322) rise to 2.
PAMS NSE–8/9 Troubleshooting Technical Documentation Card rejected fault VSIM according to spec. 2.8Vmin (3V card) 3,2Vmax 4.
PAMS NSE–8/9 Troubleshooting Technical Documentation 4.7. Audio fault. Upon disassembly it is wise to check the spring contacts of the audio transducers and bottom connector Uplink and downlink are broken Voltage on V202 pin 4 (HOOKDET) is 2.
PAMS NSE–8/9 Troubleshooting Technical Documentation Uplink is broken Voltage at C230 is 1.8V Voltage at C231 is 0.3V during call Yes DC–Voltage on COBBA side of C258 & C259 is 1.
PAMS NSE–8/9 Troubleshooting Technical Documentation Downlink broken Voltage on C221 & C222 is 1.
PAMS NSE–8/9 Troubleshooting Technical Documentation 4.8. Charging Fault Nothing happens when charger is connected Voltage level at R101 is higher than 0.
PAMS NSE–8/9 Troubleshooting Technical Documentation Display information: Not charging Yes Voltage at C155 is about 0.5V, power on, BTEMP value 47k No Check R125, C127, C155 and N100 Yes Check charg_ctrl 32Hz (fast charger) or 1Hz (slow charger) at R142 No Check N100 and R142 andR117 Yes Is voltage the same on both side on switcher? C110 (3.2–4.1V) and at V101 (2.0–3.0V) Yes No voltage over R137 when charger is connected ACP7~70mV ACP9~190mV No Go to Switcher on fig4.
PAMS NSE–8/9 Technical Documentation Troubleshooting RF Troubleshooting Measurements should be done using Spectrum Analyzer with high–frequency 500 ohm passive probe (LO–/reference frequencies and RF–power levels) and Oscilloscope with a 10:1 probe (DC–voltages and low frequency signals). RF–section is mainly build from two ASICS CRFU3 (N600) and SUMMA (N700), external filters, MMIC PA–modules (N500, N501) and two synthesizers.
PAMS NSE–8/9 Troubleshooting Technical Documentation PCB Bottom view(GF7) N500 1 PA GSM 4 L500 Coupler GSM Z504 PCN Switch L503 Coupler PCN 1 Z601 71 MHz SAW TX GSM Z600 Z700 TX GSM 116MHz RX GSM Z702 TX PCN 232MHz Z505 Diplexer 13 25 4 N600 CRFU3 Z501 PA PCN RX PCN N501 Z602 N502 TX PCN 4 PCN Buffer 1 Z603 TX PCN RX PCN N700 SUMMA 25 13 1 37 T600 PCN Balun Z502 37 1 LO Filter 116MHz RX 187MHz 13MHz Filter Z701 G702 G700 OUT VHF VCO Vcc Vcc UHF VCO OUT PCB To
PAMS NSE–8/9 Troubleshooting Technical Documentation 2. GSM Receiver 2.1 . General instructions for GSM RX troubleshooting Start WinTesla–Service–Software and Select: Alt+p Product Band b GSM Select: g Alt+e Testing RF Controls RX Continuous r Alt+r Cont. Mode Ch: 60 Alt+o, 60 Front End On (if Front End is off, Alt+e) Apply a 947.0 MHz (channel 60) –50 dBm signal to MJS–13 RF–connector. This signal is tracked through RX–path and will make the troubleshooting of the RX easier. 2.2 .
PAMS NSE–8/9 Troubleshooting 2.3. Technical Documentation Fault finding chart for GSM receiver . Oscilloscope SUMMA N700 pin 41 SUMMA N700 pin 35 CRFU3 N600 pin 8, 47 CRFU3 N600 pin 13, 33 NO OK VREF VRX_2 VSYN_2 VRX_1 Vdc = Vdc = Vdc = Vdc = 1.5 Volt 2.8 Volt 2.8 Volt 2.
PAMS NSE–8/9 Troubleshooting Technical Documentation . Spectrum analyser CRFU3 N600 pin 18,19 947 MHz NO Pin = –47 dBm Check GSM Filter (Z600) YES Spectrum analyser CRFU3 N600 pin 15,16 71 MHz NO Spectrum analyser Pout = – 23 dBm CRFU3 N600 pin 4 2036 MHz YES Pin = –8 dBm NO Check UHF Syntheziser YES Spectrum analyser Check SUMMA N700 pin 37,38 71 MHz Pin = –37 dBm CRFU3 (N600) NO Check 71 MHz SAW Filter YES Spectrum analyser SUMMA N700 pin 30 13 MHz .
PAMS NSE–8/9 Troubleshooting Technical Documentation . Check NO SUMMA Pin 36, RXC Pout = –3 dBm YES Spectrum analyser SUMMA N700 pin 25 13 MHz NO Check Pin = –22 dBm 13 MHz Filter YES Spectrum analyser SUMMA N700 pin 23, 24 13 MHz NO Check Pout = –3 dBm SUMMA YES Check BaseBand .
PAMS NSE–8/9 Troubleshooting Technical Documentation 3. PCN Receiver 3.1 . General instructions for PCN RX troubleshooting Start WinTesla–Service–Software and Select: Alt+p Product Band b PCN Select: p Alt+e Testing RF Controls r RX Continuous Alt+r Cont. Mode Ch: 700 Alt+o, 700 Front End On (if Front End is off, Alt+e) Apply an 1842.8 MHz (MID channel) –50 dBm signal to MJS–13 RF–connector. This signal is tracked through RX–path and will make the troubleshooting of the RX easier. 3.2 .
PAMS NSE–8/9 Troubleshooting Technical Documentation 3.3 Fault finding chart for PCN receiver . Oscilloscope SUMMA N700 pin 41 VREF SUMMA N700 pin 35 VRX_2 CRFU3 N600 pin 8, 47 VSYN_2 CRFU3 N600 pin 13, 33 VRX_1 NO OK Vdc = Vdc = Vdc = Vdc = 1.5 Volt 2.8 Volt 2.8 Volt 2.8 Volt Check BaseBand YES Spectrum analyser Verify 500 ohm passive probe. Measure at Diplexer (Z503) antenna port 1842.
PAMS NSE–8/9 Troubleshooting Technical Documentation . . Spectrum analyser CRFU3 N600 pin 42,43 1842.8 MHz Pin = –47 dBm NO Check PCN Filter (Z602) YES Spectrum analyser CRFU3 N600 pin 45,46 187 MHz Spectrum analyser Pout = –28 dBm NO CRFU3 N600 pin 4 2029.8 MHz YES Pin = –7 dBm NO Check UHF Syntheziser YES Check Spectrum analyser CRFU3 (N600) CRFU3 N600 pin 11,12 187 MHz Check Pin = –31 dBm NO 187 MHz Filter YES Spectrum analyser CRFU3 N600 pin 15,16 71 MHz . Issue 1 07/99 .
PAMS NSE–8/9 Troubleshooting Technical Documentation . Spectrum analyser Pout = –26 dBm NO CRFU3 N600 pin 9 116 MHz YES Check Pin = –8 dBm NO VHF Syntheziser YES Check Spectrum analyser CRFU3 (N600) L600, L601 SUMMA N700 pin 37,38 71 MHz Check Pin = –39 dBm NO 71 MHz SAW Filter YES Spectrum analyser SUMMA N700 pin 30 13 MHz Pout = –5 dBm NO Check SUMMA pin 36, RXC YES Spectrum analyser SUMMA N700 pin 25 13 MHz Check Pin = –24 dBm .
PAMS NSE–8/9 Troubleshooting Technical Documentation . Spectrum analyser SUMMA N700 pin 23, 24 13 MHz Check NO Pout = –3 dBm SUMMA YES Check BaseBand .
PAMS NSE–8/9 Troubleshooting Technical Documentation 4. GSM Transmitter 4.1 General instructions for GSM TX troubleshooting Apply a RF–cable to the MJS–13 RF–connector to allow the transmitted signal act as normal. RF–cable should be connected to measurement equipment or to at least a 10–dB attenuator, otherwise the PA may be damaged. Start WinTesla–Service–Software and Select: Alt+p Product Band b g GSM Select: Alt+e Testing RF Controls 4.2 .
PAMS NSE–8/9 Troubleshooting Technical Documentation 4.3 . . Fault finding chart for GSM transmitter Oscilloscope SUMMA N700 pin 41 VREF SUMMA N700 pin 27, 47 VTX SUMMA N700 pin 32 TXP CRFU3 N600 pin 8, 47 VSYN_2 CRFU3 N600 pin 39 VTX . Vdc = Vdc = Vdc > Vdc = Vdc = 1.5 Volt 2.8 Volt 2.5 Volt 2.8 Volt 2.8 Volt NO OK Check BaseBand YES Oscilloscope SUMMA N700 pin 1 SUMMA N700 pin 2 SUMMA N700 pin 3 SUMMA N700 pin 4 TXQN TXQP TXIP TXIN Vac = 0.4 Vpp, Vdc = 0.8 V Vac = 0.4 Vpp, Vdc = 0.
PAMS NSE–8/9 Troubleshooting Technical Documentation . . Check Pin = –5 dBm NO 116 MHz LC Filter YES Spectrum analyser CRFU3 N600 pin 22 902 MHz Pin = +9 dBm NO Spectrum analyser CRFU3 N600 pin 4 2036 MHz YES Pin = –8 dBm NO Check UHF Synthesizer YES Spectrum analyser Check GSM PA N500 pin 1 902 MHz CRFU3 Pin = 0 dBm NO Check GSM Filter (Z601) YES WinTesla TX_Data Type: Random TX Power Level: 10 Alt+d,r Alt+x,10 Spectrum analyser GSM PA N500 pin 4 902 MHz . .
PAMS NSE–8/9 Troubleshooting Technical Documentation . Check NO Pout = +21 dBm GSM PA (N500) YES Check Power Loop Detector (V500) SUMMA N700 pin 31 SUMMA N700 pin 34 – TXC Spectrum analyser MJS–13 RF–connector 902 MHz Check NO Pout = +20 dBm Directional Coupler (L500) Duplexer (Z500) Diplexer (Z503) YES GSM TX OK .
PAMS NSE–8/9 Troubleshooting Technical Documentation 5. PCN Transmitter 5.1 . General instructions for PCN TX troubleshooting Apply a RF–cable to the MJS–13 RF–connector to allow the transmitted signal act as normal. RF–cable should be connected to measurement equipment or to at least a 10–dB attenuator, otherwise the PA may be damaged. Start WinTesla–Service–Software and Select: Alt+p Product Band b p PCN Select: Alt+e Testing RF Controls 5.2 .
PAMS NSE–8/9 Troubleshooting Technical Documentation 5.3. . Fault finding chart for PCN transmitter Oscilloscope SUMMA N700 pin 41 VREF SUMMA N700 pin 27, 47 VTX SUMMA N700 pin 32 TXP CRFU3 N600 pin 8, 47 VSYN_2 CRFU3 N600 pin 39 VTX . Vdc = Vdc = Vdc > Vdc = Vdc = 1.5 Volt 2.8 Volt 2.5 Volt 2.8 Volt 2.8 Volt Check NO OK BaseBand YES Oscilloscope SUMMA N700 pin 1 SUMMA N700 pin 2 SUMMA N700 pin 3 SUMMA N700 pin 4 TXQN TXQP TXIP TXIN Vac = 0.4 Vpp, Vdc = 0.8 V Vac = 0.4 Vpp, Vdc = 0.8 V Vac = 0.
PAMS NSE–8/9 Troubleshooting Technical Documentation . Check Pin = –11 dBm NO 232 MHz SAW Filter YES Spectrum analyser CRFU3 N600 pin 40 1747.8 MHz Spectrum analyser Pin = 0 dBm NO CRFU3 N600 pin 4 1979.8 MHz YES Spectrum analyser Pin = +6 dBm PCN Buffer N502 pin 1 1747.8 MHz NO Check UHF Synthesizer YES Check CRFU3 Check NO PCN Filter (Z603) Pin = –7 dBm YES Spectrum analyser PCN Buffer N502 pin 4 1747.8 MHz Check Pout = +1 dBm .
PAMS NSE–8/9 Troubleshooting Technical Documentation . . Spectrum analyser GSM PA N500 pin 1 1747.8 MHz NO Pin = –1 dBm Check PCN Filter (N502) YES WinTesla Alt+d,r TX_Data Type: Random TX Power Level: 10 Alt+x,10 Spectrum analyser PCN PA N501 pin 4 1747.8 MHz Pout = +8 dBm NO Check PCN PA (N501) YES Check Power Loop Detector (V500) SUMMA N700 pin 28 SUMMA N700 pin 34 – TXC Spectrum analyser Diplexer (Z503) Antenna port 1747.
PAMS NSE–8/9 Troubleshooting Technical Documentation 6. Synthesizers There are three oscillators generating the needed frequencies for RF–section. 13 MHz reference oscillator, 464 MHz VHF VCO and UHF VCO. The frequency range for UHF VCO is GSM TX: 2012.4 ... 2061.6 MHz, PCN TX: 1942.2 ... 2016.8 MHz, GSM RX: 2012.4 ... 2061.6 MHz, PCN RX: 1992.2 ... 2066.8 MHz. 6.1 .
PAMS NSE–8/9 Troubleshooting Technical Documentation Fault finding table for VHF VCO The fault finding is as described for UHF VCO with following exceptions: UHF VCO VHF VCO 1 SUMMA N700 pin 21 changed to SUMMA N700 pin 12 2 UHF VCO G700 changed to VHF VCO G702 3 SUMMA UHF PLL changed to SUMMA VHF PLL 4 UHF VCO G700 OUT–pin changed to VHF VCO G702 OUT–pin Vdc = 1.8 ... 3.0 Volt Pout > –3 dBm The exceptions will be inside (.) in the fault finding chart for the UHF VCO. 6.4.
PAMS NSE–8/9 Troubleshooting 6.5. . Technical Documentation Fault finding chart –UHF VCO and 13 MHz ref. oscillator Oscilloscope SUMMA N700 pin 21 (12) Vdc = 1.8 ... 3.0 Volt YES OK NO Oscilloscope SUMMA N700 pin 15 Vac = >2 Vpp, 13 MHz YES VCTCXO G701 is OK NO Oscilloscope VCTCXO G701 OUT– pin Vdc = 1.4 Volt Check Vac = app. 1 Vpp, 13 MHz YES Pulse–shaper D700 NO Oscilloscope VCTCXO G701 VCC–pin Check Vdc = 2.8 Volt .
PAMS NSE–8/9 Troubleshooting Technical Documentation . . Check BaseBand Oscilloscope SUMMA N700 pin 41 VREF SUMMA N700 pin 13, 22 VCP SUMMA N700 pin 9, 16, 19 VSYN_2 UHF VCO G700 VCC–pin VSYN_2 Vdc = Vdc > Vdc = Vdc = 1.5 Volt 4.0 Volt 2.8 Volt 2.7 Volt Check NO OK BaseBand YES WinTesla RX Burst Mode Oscilloscope = SUMMA N700 pin 5 SUMMA N700 pin 6 SUMMA N700 pin 7 Synthesizer clock Synthesizer data Synthesizer enable = = Check NO OK BaseBand YES . .
PAMS NSE–8/9 Troubleshooting Technical Documentation . . Spectrum analyser Spectrum analyser SUMMA pin 8 C608 2036 MHz 464 MHz Check NO VHF VCO G702 Pout > –10 dBm . YES Check Pout > –10 dBm NO UHF VCO G700 YES Spectrum analyser SUMMA N700 pin 18 1018 MHz YES Pin > –10 dBm UHF (VHF) Synthesizer seems to be OK Check discrete components NO Check CRFU3 . .
