Programmes After Market Services NPW-1 Series Transceivers Troubleshooting Instructions Issue 1 10/01 ãNokia Corporation
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Table of Contents Page No Troubleshooting Instructions ..........................................................................................1 Transceiver Troubleshooting ......................................................................................... 4 Baseband Troubleshooting ..........................................................................................4 General about testing........................................
PAMS Technical Documentation NPW-1 Troubleshooting Instructions List of Figures Page No Fig 1 Power up sequence .....................................................................................................7 Fig 2 Fault tree, phone does not power up...........................................................................9 Fig 3 Fault tree, charging .....................................................................................................13 Fig 4 Fault tree, earpiece fail .............
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Transceiver Troubleshooting The first thing to do when you are encountered with a problem is to carry out a thorough visual check of the module. Make sure that: • there are no mechanical damages • the solder joints are OK Note: Before changing anything, ALL SUPPLY VOLTAGES AND THE SYSTEM CLOCK / SLEEP CLOCK should be checked.
PAMS Technical Documentation NPW-1 Troubleshooting Instructions Note: The phone’s ESN has to re-written to the UEM, if the UEM is replaced. This can be done only in Central Service.
NPW-1 Troubleshooting Instructions • PAMS Technical Documentation Reset releasing delay • Supply voltages stabilize to their UEM HW default values • RFCLK grows to full swing • The core is ready to run but waiting for the PURX release • Reset releasing • The UPP releases the SLEEPX up to the "non sleep" -state to prevent the UEM switching the regulators "OFF" 2 MCU starts running the Bootsrap Code • written in stone/ UPP internal ROM • the program checks if there is any reason for the FDL mode (Flash Do
PAMS Technical Documentation NPW-1 Troubleshooting Instructions Figure 1: Power up sequence 1 Power key pressed • After 20ms UEM enters RESET MODE if VBAT>Vmstr+ • VFLASH1, Vana, Vcore, Vio and VR3 goes high. • VCTCXO enabled by VR3 -> RFClk 19.44 MHz running. 2 Purx released • Purx released by UEM, UEMINT goes high for 100 ms, SleepX goes high and UEM starts feeding SleepClk (32 KHz) to UPP.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation • Cbus (1.08MHz) clock starts running. Phone does not start up normally or does not stay on Note: In case of power up faults, it is not possible to force the phone on by disabling the watchdog. Instead, measurements should be taken immediately when the power key is pressed or when the battery voltage is connected to the phone (local/test mode).
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Figure 2: Fault tree, phone does not power up Try to start phone to test or local mode OK Check the power key OK FAIL Measure Vflash1,Vana,Vio,Vcore ,VR3when pwr key pressed OK FAIL VANA & VR3 missing Check G790 (missing, misaligned) Check R202, R205, C217, C220 OK Check X101 OK FAIL Measure VBAT from C261 Check 19.44MHz RF-clock from C420 FAIL Check C420 OK OK OK Check Check FAIL 19.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Flash Programming does not work Flash programming procedure 1 The phone communicates with the prommer via the production test pattern, using the following signals: • FBUSTX(serial data to phone) • FBUSRX(serial data from phone) • MBUS(serial clock for FBUSRX) • VPP(External flashing voltage for speed up flashing) • The BSI line is also used when initializing flashing (battery connector).
NPW-1 Troubleshooting Instructions PAMS Technical Documentation 11 The FLASH Program includes a package of MCU and DSP software and all default parameters for the phone. The tuning values will be added/rewritten during the Flash/Alignment phase. Flash programming error codes The various error codes can be seen from the "FPS-8 Flash" in Phoenix. The underlined text in the table below means that the item under consideration is being used for the first time in the flashing sequence. Table 2: Table 2.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation C383 C583 C683 "The Prommer has not received Phone acknowledge to the message." (C383-during algorithm download to target phone) (C583-during erasing) (C683-during programming) Flash UPP Signals between UPP-Flash C384 C584 C684 "The Phone has generated NAK signal during data block transfer.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Figure 3: Fault tree, charging Phone doesn't start charging Connect charger and check VCHARIN Fail Check F100,L100,V100,C105 OK OK Check ICHAR FAIL Check bottom connector - VIN - Charge control pin Check R202,R203,R205,C217, C220,C201,C202 and R200 OK Change the UEM Audio failures In case of audio failures, there are three possibilities to check the audio lines. 1 Make a phone call against tester and check audios.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Audio loop (Audio test/Hp In Ext Out) must be switched on by the Phoenix service software. This loop will connect audios only through the UEM. In this case, the UPP is not used. 3 Run the audio-loop self-test with Phoenix (BB Self Tests/ ST_EAR_DATA_LOOP_TEST). This loop will test the ear-data/mic-data lines between the UPP and the UEM.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Microphone or XEAR line does not work Figure 5: Fault tree, microphone fail Microphone doesn't work Run audio-loop selftest with phoenix Fail Feed 1KHz to Mic by JBA-8 and measure from Xear Ok Fail Ok Check R156,C151,C152,C157,L164 Ok Check microphone Change UPP Ok Change UEM Accessory detection 1 Start the phone in the normal mode when checking for accessory detection.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Figure 6: Fault tree, accessory detection Accessory detection doesn't work normally Check HeadInt ad-value with Phoenix (No accessory connected) - HeadInt ~0 *) Ok Use the xmic- switch on MJS-18 and check hookint ad-value.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Figure 7: Fault tree, sleep clock Sleep mode not working Measure sleep clock from J204 Issue 1 10/01 Fail Measure sleep clock from B200 Fail Check C203 &C204 Ok Ok Ok Change UPP (D400) Change UEM (D200) Change B200 ãNokia Corporation Page 17
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Display/Keyboard lights do not work Figure 8: Fault tree, Display/Keyboard lights. Display/Keyboard lights are not working Check R300 (Display) and R301 (Keyboard) FAIL Replace resistor(s) FAIL Replace LED(s) FAIL Replace UEM OK Check LEDs V300...V303 (Display) and V304...
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Display does not work Figure 9: Fault tree, Display does not work Display does not work Check that phone powers up normally (current consumption, power up sequence) In any phase of display troubleshooting use Display Test in Phoenix to produce test patterns on display. FAIL Proceed to phone doesn't power up troubleshooting FAIL Replace display module Also check with a known good display module to see if it works.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Buzzer does not work Check spring connectors and C306. • No sound: Try using a known good buzzer instead. If there is still no sound, change the UEM (D200) • Weak sound: Use the Audio test in Phoenix to set the buzzer parameters (frequency, strength). If it does not effect the sound level, change the buzzer. Vibra does not work Check spring connectors and C307&C308. • No vibration: Try using a known good vibra instead.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Infrared does not work Figure 10: Fault tree, infrared Infra Red not working Measure Vflash1 from IR module VCC(pin6), should be 2.78V FAIL Change UEM(D200) FAIL Replace faulty component(s) OK Check R350, R356, C351 and V350 OK Use ST_IR_LOOP_TEST(in BB Self Tests) in Phoenix OK FAIL Measure Tx Data from IR module(pin3) 1.8V, 9.6/115.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Receiver Troubleshooting General instructions for RX troubleshooting Start the Phoenix-software and use it to start the required RX-mode of the mobile phone. The troubleshooting flowchart is divided into three steps: (1) general checking, (29 local checking and (3) RX- chain checking. Always use an RF-cable connected from an external RF-connector to the analyzer via (RF-power) attennuator.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Figure 11: Fault tree. AMPS Apply 881.49 MHz = ch 383 -116dBm , 8kHz dev, 1 kHz sine signal to external RF-connector X900. Note! These tests are done in local mode by using RF Test UI. Y Connect HS to cellular tester, open audio AF: 1 kHz sine signal, meas SINAD AF: >12 dB N Y AMPS RX-chain OK N N Check UHF Vc (from C773) V: 1.8 ...2.1 V Start synthesizer troubleshooting Y N Check RXVHF Vc (from C720). V: 0.7 ...1.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Note! Check input level at diplexer (Z907) input. N Change EXT RF Connector Check all soldering and components in antenna circuit before changing Y Check input level at duplex filter. You can also check level at diplexer output Note! N Change diplexer Z906 Check all soldering and discrete components of frontend. Y N Change duplex filter (Z906) Check input level at LNA input (J800).
NPW-1 Troubleshooting Instructions PAMS Technical Documentation N N Check RF level at RX IF filter input at 135.54 MHz Check RF level at J751 and J752 at 2034.06 MHz Start synthesizer troubleshoot Y Y Note ! Change SAFARI (N801) Check all discrete components and voltages around SAFARI N Check RF level at RX IF filter output at 135.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation TDMA800 Since the same physical signal path is used for both analog and digital modes at the lower band, there is no need for additional troubleshooting in the digital mode. So if the digital mode at the lower band is not working properly, start the analog mode troubleshooting. TDMA1900 (only dualband) Only EXT RF connector –> 1st IF needs separate troubleshoot at upper band. After down conversion (RF –> 135.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Note! N Change EXT RF Connector Check input level of diplexer (Z907) Check all soldering and components in antenna circuit before changing Y Note! N Change diplexer (Z907) Check input level of duplex filter (Z962) Check all soldering and discrete components of frontend.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Y N Check RF level at MIX1_B input Change RX1900 bandfilter Y N N Check RF level at RX IF filter input at 135.54 MHz Check RF level at J751 and J752 at 2095.
PAMS Technical Documentation NPW-1 Troubleshooting Instructions TDMA1900 (ONLY DUALBAND) UEM TX I/Q DA-converters -> I/Q modulator and Digital gain step amplifier (SAFARI) -> IF-BPF -> Upconverter + driver (SAFARI) ->Balun -> BPF -> PA->Coupler (Power detector) -> Duplex-filter -> Diplexer -> EXT RF-connector -> Antenna The power detection and power control circuit belongs under the power control part of this guide.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Figure 13: Fault tree. Transmitter troubleshooting AMPS, PL2, CH383 Visual check of TX block - PA and up converter -TX SAW - Duplex filter - Passive components OK Check LO-signal (1017.03 MHz)@up converter and TX VHF (361.08 MHz)@N750 NOK Start synth troubleshooting OK Check supply voltage - VR2 - VBATTRF - VR5 - IPA1 - TXP1 NOK Check UEM and UPP (Baseband) OK Check TXi/q signals Test points J901...
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Check TX SAW input and output power IL: -3 dB NOK Change TX SAW filter Z905 OK Is Itot 700...800 mA? NOK Check PA output power and gain. Output power: ~28 dBm Gain: ~30 dB Change PA N901 OK NOK Check PWRDET N930 insertion loss IL< 0.3 dB Change PWRDET N930 OK Check duplexer Z906 , diplexer Z907 and RF connector X900 insertion loss Dupl IL ~2.2 dB Dipl ~0.35 dB RF conn ~0.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation TDMA1900 (only dualband) TDMA1900 mode and DAMPS mode have a common RF modulator and thus it is important that the DAMPS mode have no faults. Figure 14: TDMA1900 troubleshooting TDMA 1900, PL2, CH1000 NOK Is TDMA800 mode OK? Start AMPS troubleshooting OK Check LO-signal (2079.78 MHz)@T775 and TX VHF (363.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Is Itot 350...450 mA? NOK Check PA output power and gain. Output power: ~29 dBm Gain: ~30 dB Change PA N960 OK NOK Check PWRDET N930 insertion loss IL< 0.3 dB Change PWRDET N930 OK Check duplexer Z62 , diplexer Z907 and RF connector X900 insertion loss Dupl IL ~2.2 dB Dipl ~0.35 dB RF conn ~0.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Figure 15: Fault tree: Power control loop N Is PWRDET vs. output power OK? See chart below. Note ! Check VR2 and RFTEMP . Check C930, C931 and PWRDET module. See PWRDET vs. Output power curve Y N Is DAC value vs. PWRDET (mV) OK? Check UEM (BaseBand) The detected voltages are illustrated in the following table and diagram: Table 3: Typical detected voltages at power levels PL2...
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Figure 16: Detected voltage levels 2000 1800 Detected voltage [mV] 1600 1400 1200 800A 1000 800D 1900D 800 600 400 200 0 2 4 6 8 10 P o w e r le ve l Synthesizer Troubleshooting There are four oscillators generating the needed frequencies for RF-section. 19.44 MHz reference oscillator, 2GHz UHF VCO, TX VHF cascade amplifier VCO and RX VHF VCO integrated in Safari. RX VHF frequency is fixed 271.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Fault finding chart for 19.44 MHz oscillator Figure 17: Fault tree: 19.44 MHz oscillator 2 Change VCTCXO OK 2.No START HERE! Is VCTCXO oscillating? 19.44MHz 1.No OK! OK 1 Check voltage C792 2.78 V No OK Check resistor R792 RX VHF VCO The RX VHF VCO signal is used to generate receiver Intermediate frequency. RX VHF VCO has one fixed frequency 271.08 MHz. Operating frequency is locked in Phase locked Loop.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Figure 18: Fault tree: RX VHF VCO 4 Change SAFARI No 3 Check loopifilter components: C720, R721, C721, R722, C722, R733, C733 check also R724 OK 3.No OK 1 START HERE Is oscillator locked to 271.08 MHz 2.No Yes OK! OK 2 Check resonator components: V725, C724, C725, L730 and DC block C726 TX VHF VCO The TX VHF VCO signal is used to generate transmitter Intermediate frequency. TX VHF VCO has two fixed frequencies 361.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Figure 19: Fault tree: TX VHF VCO 4 Check components: 5 C740, C741, C742, R741, R742, R743 and C749, C750, L750 Change cascade amplifier N750 OK 6.No 5.No OK OK 4.No 3 Check resonator components: OK 3.No 1 START HERE Is oscillator locked to 361.08 MHz or 363.6 MHz Yes 6 Change SAFARI OK! V744, C745, L746, C747, C748 2.No OK 2 Check operating voltage: 4.
NPW-1 Troubleshooting Instructions PAMS Technical Documentation Fault finding chart for UHF SYNTHESIZER Figure 20: Fault tree: UHF Synthesizer Change VCO OK 3. No 2. No Change SAFARI 4. No START HERE! No Yes Is frequency locked? 2009.1 - 2125.53 MHz Is EVM OK? OK No Check loopfilter components and balun OK low band Yes 1. No 1 Check loopfiler components OK Check VCO operatig voltage: 2.
NPW-1 Troubleshooting Instructions Page 40 PAMS Technical Documentation ãNokia Corporation Issue 1 10/01
