Nokia Customer Care 6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Series Transceivers Troubleshooting - RF Issue 1 - Revision 002 09/2004 Company Confidential ©2004 Nokia Corporation
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Contents Nokia Customer Care Page RF Troubleshooting......................................................................................................................................... 5 Phone Components ..................................................................................................................................... 6 General Troubleshooting .........................................................................
Nokia Customer Care 6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF TX UHF LO Schematic ........................................................................................................................... 57 UHF PCS TX LO Spectrum .................................................................................................................... 59 UHF Cell TX LO Spectrum ..............................................................................................................
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Nokia Customer Care 6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF RF Troubleshooting When troubleshooting the receiver, first check the RX_AGC PDM value. The AGC value should be close to the typical values (see "RF AGC Status" on page 26). The RX AGC tries to keep a constant amplitude at the output of the receiver chain; if the AGC value indicates an AGC gain that is substantially higher than normal, the AGC is compensating for extra loss in another component.
015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Phone Components Figures 1 and 2 illustrate the main components of the 6015/6015i/6016i/6019i, and 6012.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Cell antenna pads HF speaker pads Power switch GPS shield GPS CER filter Audio ASIP GPS antenna pads HS jack pads GPS SAW filter GPS LNA Battery connector GPS BB IC GPS RF IC PCS duplexer GPS TCXO Diplexer SAW filter LNA Alfred Cell duplexer PWR detector SAW filter Cell PW amp VCTCXO UHF VCO PCS PW amp PLL synthesizer Jupiter RF TX RX shields Batman RF RX TX shield BI-DIR diode RUIM connectors ESD f
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care General Troubleshooting Use the following steps to troubleshoot some common issues, such as low transmitter power, a faulty receiver, or a phone that cannot make a call. TX Power Low If TX power is low, use Phoenix to turn on the transmitter in Local Mode and check the following: 1. Perform a visual inspection of the PWB under a microscope to check for the proper placement, rotation, and soldering of components. 2.
Nokia Customer Care 6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF 4. The call box channel is set for a channel in PRL. 5. The SID is correct and entered into the phone. 6. The VCTCXO is centered as described in the VCTCXO tuning description on page 49. 7. The transmitter and receiver are working properly in Local Mode. Transmitter Parts Following are the transmitter RF parts.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Cell Transmitter Block Diagram Following is the block diagram for the TX system.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Nokia Customer Care Troubleshooting - RF Transmitter Schematics The following schematics are for general reference only. See the Schematics chapter for detailed versions.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care PCS duplexer PCS PA Diplexer Power detector Couplers Cell PA Cell duplexer Figure 6: Transmitter schematic 2 Page 12 ©2004 Nokia Corporation Company Confidential Issue 1 - Revision 002 09/2004
Nokia Customer Care 6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Transmitter Troubleshooting Setup Use the following sections to set up troubleshooting in Phoenix according to the band you are using: • "AMPS TX Setup" • "Cell TX Setup" • "PCS TX Setup" AMPS TX Setup Use the following procedures to prepare for AMPS TX troubleshooting using Phoenix. 1. Connect RF test connector to a call box. 2. Connect the phone to a PC via the bottom connector, and connect a power supply. 3.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care The AMPS Control dialog box appears. Figure 8: AMPS Control dialog box 6. Click the Tx Control tab. 7. In the Set Channel field, type 384. 8. In the Power Level field, type 2. 9. Select the Transmitter ON option, and click Execute. 10. Configure the spectrum analyzer using the following values: • Center Frequency = 836.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care 3. Select the following values on the RF Main Mode dialog box: • Band = Cell (CDMA) • Channel = 384 • Mode = Rx/Tx Figure 9: RF Main Mode dialog box 4. Click Set. Note: Be sure that the “RF Main Mode set successfully” message appears in the status bar. 5. Open the Troubleshooting menu, point to RF, and click CDMA Control. The CDMA Control dialog box appears.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care The RF PDM Control dialog box appears. Figure 11: RF PDM Control dialog box for Cell troubleshooting 9. Click Read Phone to update the values. 10. Configure the spectrum analyzer using the following values: • Center Frequency = 836.52 MHz • Span = 100 MHz • Amplitude = 20 dBm • Attenuation = Auto • BW = Auto PCS TX Setup Use the following procedures to prepare for PCS TX troubleshooting using Phoenix. 1.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care 4. Select the following values on the RF Main Mode dialog box: • Band = PCS (CDMA) • Channel = 600 • Mode = Rx/Tx 5. Click Set. Note: Be sure that the “RF Main Mode set successfully” message appears in the status bar. 6. Open the Troubleshooting menu, point to RF, and click CDMA Control. The CDMA Control dialog box appears. (See Figure 10 on page 15.) 7. Select the following values on the CDMA Control dialog box.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care 2. If all DC voltages are present, check the AGC control voltages. (See Figure 13 on page 19). • If the voltages are incorrect, check the SMDs around the TX_AGC1 and TX_AGC2 lines. • If SMDs are all good, replace the UPP. 3. Using an oscilloscope, look at the input modulation waveforms on R603, R604, R605, and R606. They should all be present with an AC swing of about 500 mVpp and a +1.2 V offset.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Bad output Good output Figure 12: The output of the phone on a spectrum analyzer should look like the figure on the left If using the AAS-10 probe with the phone connected to the call box, the amplitude should be approximately -7 dBm at the antenna test point on the top of the PWB. TX DC Probe Points Following are the transmitter DC probe points on the top side of the PWB.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care 11 16 12 14 13 15 Figure 14: Bottom side TX DC probe points Table 1 shows the TX DC probe points for the bottom and top sides of the PWB. Table 1: TX DC Probe Points Test Point Description Value 1 Power detector VR2 2.76V 2 Vbatt PCS* 3 AGC 2 0.1 to 1.8V 4 AGC 1 0.1 to 1.8V 5 TX IQ IN TX IQ IN with oscilloscope Approximately 1. 2V Approximately 500 mV p-p 6 VR6 2.8V 7 VR1B 4.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Table 1: TX DC Probe Points (Continued) Test Point Description Value 12 VR6 2.78V 13 VR1B 4.7V 14 VR2 2.78V 15 Vbatt* 3.2 to 4.7V 16 TX detector out Approximately 1.5V Note: Vbatt also appears at the outputs of the PAs. TX RF Probe Points Following are the TX RF probe points.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Table 2: TX RF Probe Points (Continued) Test Point Description Value 5 TX IQ in with oscilloscope Approximately 500 mV p-p with +1.2 V offset 6 TX UHF LO PCS: 3760 MHz, -54 dBm Cell: 3346.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Nokia Customer Care Troubleshooting - RF PCS RF FILTER AMPS IF FILTER PCS DUPLEX FILTER PCS RFA PCS LNA IQ DEMOD AMPS I LOA BBFIL/BBAMP UHF VCO VGA Alfred Rx IC DIPLEX FILTER Cell RFA Batman Rx Down-converter Q CDMA Cell LNA CELL DUPLEX FILTER ADC CDMA IF FILTER CELL RF FILTER Figure 16: Receiver system block diagram Issue 1 - Revision 002 09/2004 ©2004 Nokia Corporation Company Confidential Page 23
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Receiver Schematics The following schematics are for general reference only. See the Schematics chapter for detailed versions.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Nokia Customer Care Troubleshooting - RF Loop filter RX LO lock voltage 1.2 to 1.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care RF AGC Status Figure 19 shows the RF AGC Status dialog box. When configuring the values on this dialog box, note the following: • The RF AGC status functionality only works in Call Mode. • In the PLL Lock Status area, bright green indicates a locked PLL and dark green indicates an unlocked PLL. • In the Baseband Type field, ensure that the correct baseband is selected (BB 4.0).
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Turning on the RX Path Use the following steps to turn on the RX path using Phoenix. 1. Turn on Receiver Only in CDMA mode. 2. On the Phone Control dialog box, click the LOCAL button in the Phone State area to put the phone into Local Mode. Figure 20: Phone Control dialog box 3. Click Execute. 4. Depending on the mode of phone you have, use the settings from Table 3 on the RF Main Mode dialog box.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Figure 21: RF Main Mode dialog box for Cell (top), AMPS (middle), and PCS (bottom) Page 28 ©2004 Nokia Corporation Company Confidential Issue 1 - Revision 002 09/2004
Nokia Customer Care 6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Switching the RX Gain States Use the RF Gen I/O dialog box to switch the gain state (Hi and Lo) for CDMA and AMPS modes. Select the desired state, and click Refresh. High Gain State (default) Cell AMPS Low Gain State PCS CDMA Figure 22: RF Gen I/O dialog box Cell Receiver Check from RF to IQ Use the following values to check the CDMA Cell RX functionality from RF to IQ output. 1.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF dBm Nokia Customer Care Cell I Q Output Trace A 1 0 -10 Trace A 302 kHz -21.2500 dBm 1 -20 -30 -40 -50 -60 -70 -80 -90 -100 Centre: 300 kHz Res BW: 3 kHz 5/5/2004 3:29:30 PM Atten: 10 dB Vid BW: 3 kHz CellIQ.spt Span: 200 kHz Sweep: 100 ms HP8595E Figure 23: Receiver IQ level on CDMA Cell band Figure 24 shows the Cell spectrum with an inject tone at -75dBm, as well as the IQ output test points.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care PCS Receiver Check from RF to IQ Use the following values to check the PCS receiver functionality from RF to IQ output. 1. Start Phoenix in Local Mode with only the RX path turned on. 2. Inject a –75dBm CW signal of 1960.5MHz (i.e. 500kHz offset from 1960MHz or 10 channels away). 3. Measure a 500kHz tuning on the analyzer. You should see a typical -22dBm IQ tuning.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care RX_IP RX_IN RX_QP RX_QN Figure 26: Cell spectrum (left) and IQ output test points (right) AMPS Receiver Check from RF to IQ Use the following steps to check the AMPS receiver functionality from RF to IQ output. 1. Start Phoenix in Local Mode with only the RX path turned on. 2. Inject a –75dBm CW signal of 881.53MHz (i.e., 10kHz offset from 881.52MHz) into the RF. 3. Measure a 10kHz tone on the analyzer.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Figure 27: Receiver IQ Level on AMPS band Figure 28 shows the AMPS spectrum with an inject tone at -75dBm, as well as the IQ output test points. Note that DC is present on the IQ output test points, and all test points should be approximately equal.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Receiver Diagnostic Signal Tracing Use the following steps to trace a receiver signal. 1. Inject an external signal source of –25dBm into the RF input. An Agilent call box 8960 is recommended. 2. Press the Call Setup button, press the Active Cell soft button, and select CW. 3. Inject a CW signal for PCS (1960MHz) or Cell/AMPS (881.52MHz) at a fixed –25dBm power level.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Table 4 includes the descriptions and values for the RX RF troubleshooting test points shown in Figure 29. Table 4: Receiver RF Troubleshooting Values Test Point Description Value 1 RX LO (from VCO) 1009.62MHz at -8 dBm 2088.1MHz at -14 dBm 2 Cell Channel 384 (from duplexer) 881.52MHz at -31 dBm 3 Cell Channel 384 (to RF SAW) 881.52MHz at -20 dBm (HG) 881.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Table 5 includes the descriptions and values for RX IF troubleshooting test points shown in Figure 30. Table 5: Receiver IF Troubleshooting Values Test Point Description Value 1 CDMA IF (to SAW) 128.1 MHz Cell Channel 384 at -6 dBm (HG) Cell Channel 384 at -23 dBm (LG) PCS Channel 600 at -6 dBm (HG) PCS Channel 600 at -20 dBm (LG) 2 CDMA_IF_P (to Batman) 128.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Receiver DC 6 1 5 Alfred RX FE IC 2 4 7 3 8 Figure 31: Receiver DC troubleshooting test points and RX front-end logic levels Table 6 includes the descriptions and values for RX DC troubleshooting test points shown in Figure 31. Table 6: Receiver DC Troubleshooting Values Test Point Description Value 1 LO Vdd 2.59 VDC LO Amp Vdd supply lines for Cell and PCS 2 RFA Vdd 2.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Receiver Logic Input Voltages Following are the measure logic levels for the RX front end (N750). See Figure 22 on page 29 for the manual selection of logic states using Phoenix. 2 1 3 Table 7 includes the logic level values for the RX front end. Table 7: RX Front-end (N750) Logic Levels Mode Logic Input Voltages IF_SEL BAND GAIN_CTL Cell CDMA High Gain 0V 0.1 V 2.75 V Cell CDMA Low Gain 0V 0.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Alfred (N750) Receiver Troubleshooting Keep the following under consideration when troubleshooting the Alfred (N750) receiver: • There is a separate LNA for 800MHz (Cell and AMPS) and 1900MHz (PCS). • There is a separate RFA (inside Alfred) for 800MHz (Cell and AMPS) and 1900MHz (PCS). • After the RFA, there is a mixer and then the signals are separated by CDMA (Cell and PCS) and AMPS.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care IMPORTANT: You must check for both conditions before replacing Alfred. If you have no LO signal, refer to "UHF Synthesizer Troubleshooting" on page 50. If you have a significant supply voltage drop on one of the supply pins, then replace Alfred.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Synthesizer Block Diagram Batman RX VHF Synthesizer 1 Phase Detector Reference Divider Charge Pump 3 2 mA 9-Bit B Counter Prescaler Tank 32/33 RF_BUS_CLK RF_BUS_DATA RF_BUS_EN1X RX VHF VCO 5-Bit A Counter Band sel 2 LMX2310U UHF Synthesizer ALFRED PCS_Cell UHF RX LO Reference Divider Charge Pump Phase Detector 4 mA UHF VCO Prescaler Charge Pump 32/33 13-Bit B Counter 5-Bit A Counter SYNTH_LE VCO_C
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Table 9: Synthesizer Block Diagram Component Values (Continued) Item Description Value 3 RX VHF LO 256.2MHz 4 TX UHF LO 3395.88MHz 3819.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Nokia Customer Care Troubleshooting - RF Synthesizer Schematic The following schematic is for general reference only. See the Schematics chapter for detailed versions. VCTCXO with AFC control 19.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Use the following steps to troubleshoot the synthesizer using Phoenix: 1. On the Phone Control dialog box, click the LOCAL button in the Phone State area to put the phone into Local Mode. Figure 35: Phone Control dialog box 2. Select the following values on the RF Main Mode dialog box:.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care If you do not see the VCTCXO signal at any of these points, check to see if there is voltage at the following points: • VR3, main supply line for VCTCXO circuitry, should be 2.78VDC • AFC voltage, should be between 1 and 3 V, and should be adjustable with the FC slider on the RF PDM Control dialog box in Phoenix. If the AFC voltage is missing, check the UEM. Measuring the AFC Voltage 1.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Typical voltages observed are as follows: • AFC PDM[0] = 1.3V • AFC PDM[-1024] = 0.8V • AFC PDM[1023] = 2.5V VCTCXO Manual Tuning The VCTCXO can be manually tuned to verify when a phone is tuned incorrectly or if the phone cannot make a call. To verify, monitor the RF signal at the output of the phone. Use the following steps to set up a CW signal: 1.
Nokia Customer Care 6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF 6. The next step depends on the type of measurement equipment you are using: • Spectrum analyzer: Set the center frequency to 836.52MHz, set the span to 2MHz, and establish a marker at 836.52MHz. • HP8960: Set the callbox System Type to AMPS, set the ACC channel to 384, and use the Frequency Accuracy measurement to center the VCTCXO (minimum Frequency Error). 7.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Figure 40: TX output for Cell channel 384 at 25C Figure 41: TX output for PCS channel 600 at 25C Page 48 ©2004 Nokia Corporation Company Confidential Issue 1 - Revision 002 09/2004
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care VCTCXO and UHF Synthesizer Probe Points Figure 42 shows the VCTCXO probe points (alphabetic) and the UHF synthesizer probe points (numeric). 1 2 3 4 A 5 6 7 8 B 9 C D 10 Figure 42: VCTCXO and UHF synthesizer probe points Table 12 shows the values and description for the VCTCXO probe points in Figure 42. Table 11: VCTCXO Probe Point Values and Descriptions Probe Point Description A 19.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Table 11 shows the values and description for the UHF synthesizer probe points in Figure 42. Table 12: UHF Synthesizer Probe Point Values and Descriptions Probe Point Description Values 1 VR3 2.8V 2 Lock voltage DC between 0.8 and 3.4V, S/B 1.2V at the center frequency 3 UHF LO PCS_CEL_LO input to Alfred Cell channel 384: 1009.62MHz > -9dBm PCS channel 600: 2088.
Nokia Customer Care 6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF The Frequency Calculator dialog box appears. Figure 43: Frequency Calculator dialog box for Cell (top) and PCS (bottom) 2. Check to see if the LO is locked. Set a channel and check the output of the UHF LO at L502 within a very narrow span of 100KHz. The LO should be virtually immobile. 3. Measure for nominal UHF LO signal levels using and RF probe.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care UHF Synthesizer Schematic The following schematic is for general reference only. See the Schematics chapter for a detailed version.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care PCS UHF LO Channel 600 Spectrum Measure the signal purity of the UHF LO and check the spur level offset from the carrier. Also, check the VCO, PLL IC, loop filter, and power supply decoupling.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF • 60kHz offset -91dBc • 90kHz offset -91dBc Nokia Customer Care Figure 46: Cell UHF LO channel 384 typical spectrum Following ar possible causes for an incorrect UHF frequency: RX VHF LO The RX VHF LO operates at a fixed frequency of 256.2MHz. It is the second LO for downconversion to I and Q for baseband processing. Use the following guidelines when troubleshooting: • Monitor the probing point at C702 for the Batman LO.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Nokia Customer Care Troubleshooting - RF RX VHF LO (Batman) Schematic The following partial schematic is for general reference only. See the Schematics chapter for a detailed version.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Figure 48 shows the RX VHF LO probe points. 1 2 4 3 Figure 48: RX VHF LO probe points Table 13 gives the description and values for the probe points as shown in Figure 48. Table 13: RX VHF LO Probe Points Probe Point Description Value 1 VR5 2.8V 2 VR7 2.8V 3 RX LO lock voltage 1.2 to 1.7 VDC 4 RX LO 256.2 MHz, -60 dBm TX UHF LO There are two fixed LOs: 3296.16~3395.88MHz for Cell band and 3700~3819.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Nokia Customer Care Troubleshooting - RF TX UHF LO Schematic The following partial schematic is for general reference only. See the Schematics chapter for a detailed version.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care Figure 50 shows the TX UHF LO probe points. 1 2 3 4 Figure 50: TX UHF LO (Jupiter) probe points Table 14 gives the description and values for the probe points as shown in Figure 50. Table 14: TX UHF LO Probe Points Probe Point Description Value 1 Measure frequency by probing the top of the chip PCS: 3760 MHz (channel 600) -54dBm Cell: 3346.08 MHz (channel 384) -57dBm 2 VR6 2.8V 3 VCC_VCO 2.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care UHF PCS TX LO Spectrum Following is the UHF PCS TX LO (3700 ~3819.90)/2 MHz spectrum. Key observations: • The following reference spurs • 50kHz offset -59dBc Figure 51: UHF PCS TX LO (3700 ~3819.
15/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care UHF Cell TX LO Spectrum Following is the UHF Cell TX LO (3296 ~3395.88)/4 MHz Cell spectrum. Key observations: • The following reference spurs • 30kHz offset -65dBc Figure 52: UHF Cell TX LO (3296.16 ~3395.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Nokia Customer Care Troubleshooting - RF GPS RF Troubleshooting Following is the GPS RF block diagram.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care GPS Schematic The following schematic is for general reference only. See the Schematics chapter for a detailed version.
Nokia Customer Care 6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF GPS RF General Testing In radiated testing the CW level has to be higher because of the attenuation in pad + cable + coupler. With a -20 dB pad, the signal level in the signal generator is ~ -110 dBm + cable attenuation + 20 dB + 18 dB. The CW analysis allows end-to-end spectral purity to be assessed during manufacturing and development. 1.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care 3. Open the Troubleshooting menu, and click GPS Control. The GPS Control dialog box appears. Figure 57: GPS Control dialog box 4. Select GPS Quick Test in the Function area, and ensure that the Test Mode area shows a value of Galvanic. 5. Click Execute. Self Test Failure If the test fails, repeat steps 1—5. If the test fails again, continue with the following selftest failure troubleshooting: 1.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care 1 2 3 4 5 Figure 58: GPS testing area Table 15 gives the description and values for the probe points as shown in Figure 58. Table 15: GPS Test and DC Probe Point Values Probe Point Description Value 1 LNS_Base 0.8V 2 LNA Vcc 1.5V 3 TCXO Vcc 2.8V 4 VIO_GPS 1.8V 5 VRF_GPS 2.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care GPS RF Probing Use the following steps for RF probing: 1. Open the Troubleshooting menu, and click GPS Control. The GPS Control dialog box appears. Figure 59: GPS Control dialog box 2. Select Simple Rx Actions in the Function area. 3. Select On in the Options area. 4. Click Execute. 5. Inject a -50 dBm tone at 1575.52 MHz into the GPS connector (X001) with a signal generator or call box. (See Figure 56 on page 63.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting - RF Nokia Customer Care 6. Measure the probe points with either a voltmeter or an AAS_10B probe with a spectrum analyzer set at a center frequency of 1575.25MHz and a span of 500kHz. (All points are 1575.52MHz, except for TCXO, which is at 16.368MHz.) 3 4 7 5 2 1 GPS RFIC 8 6 GPS BBIC Figure 60: GPS RF probing points Table 16 includes the values for the probing points in Figure 60.
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