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NPE-3 Baseband Trouble shooting PAMS Technical Documentation Flash programming (1) Flash programming doesn’t work If fault information from Prommer is: a) MCU doesn’t boot b) Serial dataline failure c) Serial clock line failure No See section: (2) Yes Connect J102 (WDDIS) to GND. Yes No J108 (VBB) = 2.8V J105 (VXO) = 2.8V See section: "Phone is dead" Yes J101 (PURX) = "1" (2.8V) after 60ms No Check J112 (SLEEPCLK) No = 32KHz square wave Check sleepclock circuit: B110, R111,...
NPE-3 Baseband Trouble shooting PAMS Technical Documentation Flash programming (2) Flash programming doesn’t work Yes External RAM fault No Check for activity on control lines of SRAM: J324 (RAMselX),... Yes Faulty D310 SRAM No Faulty D301 MAD2 Algorithm file or alias ID not found Yes Check type of Flash No MCU Flash Vpp Error No Yes Flashing via X002 ? Yes No Check Vpp line: X002 pin 10 -> R1 -> C349. Check D001 No Faulty PCB Voltage at R1 higher than 1.
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NPE-3 Baseband Trouble shooting PAMS Technical Documentation 1 DSP constants download Start Patch code download initialization Initialization done MAD2 (DSPXF) J314 2 PSW search Last PSW OK synchronization OK Channel scan starts MAD2 (DSPXF) J314 3 Send RACH RACH OK Go SDCCH imediate assigment OK MAD2 (DSPXF) J314 ,VVXH 1RNLD 0RELOH 3KRQHV /WG 3DJH
NPE-3 Baseband Trouble shooting PAMS Technical Documentation Phone doesn’t register to the network... Phone doesn’t register to the network or phone doesn’t make a call No C254 (VCOBBA) > 2.7V Check N102 CCONT Yes No C240 (Vref) = 1.5V Check C144, C240, R240 Yes Check supply voltage, during RX slot: C157 (VCP) > 4.8V C137 (VRX) > 2.7V C131 (VSYN_1) > 2.7V C133 (VSYN_2) > 2.7V - during TX slot: C142 (VTX) > 2.
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NPE-3 Baseband Trouble shooting PAMS Technical Documentation SIM card rejected fault (2) "SIM card rejected" VSIM according to spec.: 2,8V min. (3V SIM card) 4,5V min.
NPE-3 Baseband Trouble shooting PAMS Technical Documentation $XGLR )DXOWV Earpiece doesn’t work and there isn’t any mechanical problem Microphone doesn’t work and there isn’t any mechanical problem Check R247, C248, C249 C233 towards SRAM (bias) = 2.
NPE-3 Baseband Trouble shooting PAMS Technical Documentation &KDUJHU )DLOXUH Nothing happens when charger is connected YES R103 towards C101 (VCHAR, N102) > 0.4 V when charger is connected Check NO X001, F101, L104 R102, R103 YES N102 is faulty Display Information: “Not charging” YES R121 towards C127 (BSI, N102) ≈ 0.8 V when power is connected. BSI resistor value should be 39K (BLS-2 batt) Check NO X101, R120, R122 YES R123 towards C126 (BTEMP, N102) ≈ 0.5 V when power is connected.
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NPE-3 Rf Troubleshooting PAMS Technical Documentation )DXOW ILQGLQJ FKDUW IRU 3&1 UHFHLYHU PCN Fault tree Apply -80dBm 1842.867MHz signal from generator to antenna connector Yes Oscilloscope at RXI Signal 1.5Vpp DC offset 1,1V Frequency 67,7kHz No Change generator level to -55dBm Yes Spectrumanalyzer Spectrumanalyzer V701, RFout No 1st PCN SAW out -72dBm -92dBm PCN_RX -91.5dBm No Yes EGSM chain functional Check RX/TX Switch Z900 Yes Oscilloscope LNA_P 2.4-2.
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NPE-3 Rf Troubleshooting PAMS Technical Documentation )DXOW ILQGLQJ FKDUW IRU 3// 6\QWKHVLVHU From WinTesla chose: Product > Band > EGSM Testing > RF Controls > Rx continuous > Ch 60 Spectrum Analyzer Oscilloscope No VCO output ( G600 out) 3788 MHz VCTCXO Power Supply (G602 Vcc) 2,7 V No Yes PLL block functional Oscilloscope Yes Check CCONT, Software?? Phone not in function Oscilloscope Yes Yes VCTCXO output (G602 out) 26 MHz, approx. 0.
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