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Nokia 2366i Rf Description And Troubleshooting

Nokia 2366i Rf Description And Troubleshooting

Mobile terminals
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Nokia Customer Care
2366i (RM-155)
Mobile Terminals
RF Description and
Troubleshooting
©2007 Nokia Corporation
Issue 2 - February 2007
Company Confidential

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  • Page 1 Nokia Customer Care 2366i (RM-155) Mobile Terminals RF Description and Troubleshooting ©2007 Nokia Corporation Issue 2 - February 2007 Company Confidential...

  • Page 2: Table Of Contents

    2366i (RM-155) RF Description and Troubleshooting Contents Page Introduction ..............................5 Preliminary RF Troubleshooting ......................6 RF Troubleshooting Equipment List ......................7 Configure Phoenix for RF Troubleshooting ..................7 Transmitter RF Troubleshooting ......................10 Transmitter Schematics ...........................11 Transmitter Troubleshooting Guidelines .....................13 Transmitter Initial Troubleshooting ......................13...
  • Page 3 2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Test Setup 2 ..............................52 Test Setup 3 ..............................53 Test Setup 4 ..............................54 Test Setup 5 ..............................55 Bluetooth Troubleshooting Flowchart ....................56 Bluetooth DC and RF Probe Points .......................57 Issue 2 - February 2007...
  • Page 4 2366i (RM-155) RF Description and Troubleshooting Nokia Customer Care This page intentionally left blank. Page 4 Company Confidential Issue 2 - February 2007...

  • Page 5: Introduction

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Introduction The 2366i mobile terminal is based on a tri-mode, code division multiple access or “CDMA,” dual-band engine and a GPS receiver. DC/DC Converter FM Radio IC (Not used) Figure 1: PWB components - top...

  • Page 6: Preliminary Rf Troubleshooting

    2366i (RM-155) RF Description and Troubleshooting Connector Coupler GPS LNA Diplexer RX circuits PCS Duplexer Cell/PCS PA G7100 Cell Duplexer 19.2MHz Cell TX Filter FBus Tx TX IC MBus Tx/Rx FBus Rx PCS TX Filter 32KHz VCORE VR1A TX ASIC...

  • Page 7: Rf Troubleshooting Equipment List

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting • The call box channel is set for a channel in PRL. • The SID is correct and entered into the mobile terminal. For Test mode, SID is 4 and paging channel is: 385/Cell and 1175/PCS.
  • Page 8 2366i (RM-155) RF Description and Troubleshooting Figure 3: Phoenix Control Setup Page 8 Company Confidential Issue 2 - February 2007...
  • Page 9 2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting 3. In the Phone Control window, select the Phone State tab, Local, and Execute. 4. See Table 1 for the remaining settings. Table 1: Phoenix Settings—RF Test For Cell For PCS RF Main Mode window: 1.

  • Page 10: Transmitter Rf Troubleshooting

    2366i (RM-155) RF Description and Troubleshooting Transmitter RF Troubleshooting Figure 4 is the block diagram for the Tx RF system. Figure 4: Transmitter system block diagram Page 10 Company Confidential Issue 2 - February 2007...

  • Page 11: Transmitter Schematics

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Transmitter Schematics The following schematics are for general reference only. See the Schematics chapter for detailed versions. TX LO Lock Voltage Loop Cell TX Filter Filter PCS TX TX IC Filter...
  • Page 12 2366i (RM-155) RF Description and Troubleshooting Nokia Customer Care PCS Duplexer Diplexer PA IC Cell Duplexer DC-DC Converter Figure 6: Power Amplifier schematic Page 12 Company Confidential Issue 2 - February 2007...

  • Page 13: Transmitter Troubleshooting Guidelines

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Figure 7: Measurement Points and Voltages Transmitter Troubleshooting Guidelines Use the following guidelines when troubleshooting. • Always perform visual inspection of PCB under microscope to check proper placement, rotation, and soldering of components.

  • Page 14: Dc Power Checks

    2366i (RM-155) RF Description and Troubleshooting 3. Set up Phoenix as described in "Configure Phoenix for RF Troubleshooting" on page 7. DC Power Checks Check the Tx DC points to ensure that voltages are present (see "TX RF Test Points" on page 22).
  • Page 15 2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting 4. Open the Troubleshooting menu, point to RF, and click RF Main Mode. The RF Main Mode dialog box appears. Figure 8: RF Main Mode dialog box for Cell Mode 5. Select the following values on the RF Main Mode dialog box: Band = Cell (CDMA) •...

  • Page 16: Pcs Setup

    2366i (RM-155) RF Description and Troubleshooting 10. Configure the spectrum analyzer using the following values: • Center Frequency = 836.52 MHz • Span = 100 MHz • Amplitude = 20 dBm • Attenuation = Auto Table 2: RF PDM Values...

  • Page 17: Transmitter Rf Troubleshooting Procedures

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting 10. Select the following values on the CDMA Control dialog box. State = Rho ON • Band = PCS • Radio Configuration = Mode 1: IS-95 Voice • Note: Do NOT select the “Set default PDM values” option.

  • Page 18: Failed Test: Tx Pa Detector

    2366i (RM-155) RF Description and Troubleshooting 3. Probe the PA input. • If the level is low, look for an SMD issue on the Tx SAW filter. • Reflow or replace the filter as necessary. 4. Probe the PA output.

  • Page 19: Tx Output Spectrum

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Tx Output Spectrum Following is the correct output of the mobile terminal on a spectrum analyzer with 100MHz span. Note that if you are using the AAS-10 probe with the mobile terminal connected to the call box, the amplitude should be approximately -7dBm at the antenna test point on the top of the PWB.

  • Page 20: Tx Rf Component Diagram

    2366i (RM-155) RF Description and Troubleshooting Tx RF Component Diagram Following are the Tx RF components. Tx Regulator Cell TX SAW Filter PCS TX SAW Filter TX IC Cell Duplexer DUALBAND PA IC PCS Duplexer Diplexer DC/DC Converter (Top Side) Do not remove shield when checking DC/DC converter.

  • Page 21: Dc Test Points

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting DC Test Points Figure 14 shows the DC test points. TX Powe4r Detector Output (DCout) PCS: <0.4 V @ <5 dBm 0.59 V @ 15 dBm 1.1 V @ 23 dBm Cell: <0.35 V @ <5 dBm...

  • Page 22: Tx Rf Test Points

    2366i (RM-155) RF Description and Troubleshooting Figure 14: TX DC Test Points 2 TX RF Test Points These points were measured on a Spectrum Analyzer and are peak values. To obtain Channel Power (log 1.25 MHz/30 kHz), add 16 dB. See Table 2 for PDM values for Cell and PCS.

  • Page 23: Receiver Rf Troubleshooting

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Figure 16: RF Test Points (continued) Receiver RF Troubleshooting Note the following points when troubleshooting the receiver section: • There is a separate LNA for 800MHz (Cell) and 1900MHz (PCS), each integrated into the RX IC.

  • Page 24: Receiver Block Diagram

    2366i (RM-155) RF Description and Troubleshooting Nokia Customer Care Receiver Block Diagram Figure 17 is the Receiver System block diagram. Figure 17: Receiver System block diagram Page 24 Company Confidential Issue 2 - February 2007...

  • Page 25: Receiver Schematics

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Receiver Schematics The following schematics are for general reference only. See the Schematics chapter for detailed versions. Cell/PCS LNAs Cell/PCS RF SAW filter Cell/PCS I and Q Baseband Demodulators outputs RX Synthesizer Loop Filter 19.2 MHz...

  • Page 26: Rf Agc Status

    2366i (RM-155) RF Description and Troubleshooting RF AGC Status When configuring the values on the RF AGC Status 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.

  • Page 27: Turning On The Receive Path

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Tx AGC1 Band selection PDM settings PA_DC-DC PA AGC Updates screen automatically Figure 20: RF AGC Status Dialog Box (continued) Turning on the Receive Path Use the following steps to turn on the Receive (Rx) path using Phoenix.
  • Page 28 2366i (RM-155) RF Description and Troubleshooting 3. Depending on the band, use the applicable settings from the table below on the RF Main Mode dialog box. Table 4: RF Main Mode Dialog Box Settings Band Mode Channel AMPS (not used) Rx = 881.52 MHz...

  • Page 29: Switching The Rx Gain States

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting 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. Hi Gain (Default) State at power up...

  • Page 30: Receiver Dc And Rf Test Points

    2366i (RM-155) RF Description and Troubleshooting Receiver DC and RF Test Points ANT Connector (Rx RF Input) Figure 24: Antenna connection (Rx RF input) VR2 RX 2.7 V VR4_RX VREF01 2.72 V 1.35 V VCO Control Voltage 1.6 V PCS Ch. 600 VR3_RX 1.2 V Cell Ch.
  • Page 31 2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting VR2 RX 2.7 V VREF01 V4_RX 1.35 V 2.72 V VCO Control Voltage 1.6 V PCS Ch. 600 1.2 V Cell Ch. 384 VR3_RX 2.6 V VR1_RX 2.6 V 2.7 V Vbat 3.7 V...
  • Page 32 2366i (RM-155) RF Description and Troubleshooting Cell LNA input Cell LNA output -71 dBm -68 dBm 881.52 MHz PCS LNA input -82 dBm PCS DMD 1960 MHz Differential Inputs -80 dBm PCS LNA output Cell DMD -81 dBm Differential 1960 MHz...
  • Page 33 2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Cell LNA input Cell LNA output -71 dBm -68 dBm 881.52 MHz PCS LNA input -82 dBm PCS DMD 1960 MHz Differential Inputs -80 dBm PCS LNA output Cell DMD -81 dBm...

  • Page 34: Receiver I And Q Test Points

    2366i (RM-155) RF Description and Troubleshooting Receiver I and Q Test Points Figure 29 shows the test points for the receiver I and Q channels. Note: the Baseband signal has a 1.35 V dc offset. Rx Test points (4) Figure 29: Receiver Test Points—I and Q Channels Use the following procedure to check the path from RF to I and Q output.
  • Page 35 2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting 5. Measure the level of a 300 kHz tone on the Spectrum Analyzer. The tone should be ± 2 dB of the value shown in Table Figure 30 shows the typical traces on the Spectrum Analyzer for each band.

  • Page 36: Synthesizer Troubleshooting

    2366i (RM-155) RF Description and Troubleshooting Synthesizer Troubleshooting Faulty synthesizers can cause both Rx and Tx failures during tuning, in addition to the VCTCXO tuning. However, first check for the presence of various LO signals and their proper levels. If everything fails, it may be necessary to check the reference clock (19.2MHz) which is needed for the mobile terminal to power up.

  • Page 37: Synthesizer Schematic

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting • Missing or low power supply voltage to the PLL section • Fault in the control line to the voltage controlled oscillator (VCO). • Loop filter or resonator components are missing or are incorrectly installed.

  • Page 38: Synthesizer Troubleshooting Setup

    2366i (RM-155) RF Description and Troubleshooting Synthesizer Troubleshooting Setup 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 mobile terminal into Local Mode. See...

  • Page 39: Synthesizer Troubleshooting

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Synthesizer Troubleshooting Use the following procedure to troubleshoot the Synthesizer. 1. Measure the Local Oscillator (LO) signal by probing the TX IC (N7001) with the AMS Probe at the location shown in...

  • Page 40: Incorrect Pll Frequencies

    2366i (RM-155) RF Description and Troubleshooting AMS Probe Signal: Channel 600 1115.36 MHz ~ -80 dBm Analyser Settings: Center: 1115.36 MHz Span: 200 kHz RBW: 1 kHz VBW: 300 Hz Figure 36: Cell TX LO—Typical Spectrum Incorrect PLL Frequencies Following are some possible causes for incorrect PLL frequencies: •...

  • Page 41: Afc Voltage Troubleshooting

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting AFC Voltage Troubleshooting Use the following steps to monitor the AFC voltage. 1. In Phoenix, open the RF PDM dialog box. Figure 37: RF PDM dialog box for AFC troubleshooting Figure 38 shows a partial schematic of the R7201.

  • Page 42: Vctcxo Manual Tuning

    2366i (RM-155) RF Description and Troubleshooting VCTCXO Manual Tuning You can manually tune the VCTCXO to verify when a mobile terminal is tuned incorrectly or if mobile terminal cannot make a call. Monitor the RF signal at the mobile terminal’s LNA output.
  • Page 43 2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Signal Measured at output of LNA CELL PDM AFC=ZeroPDM AFC=1023PDM AFC=-1024 PDM AFC=-102 3.526037 GHz -40.11 dBm PDM AFC=Zero 3.526079 GHz -40.34 dBm PDM AFC=1023 3.526117 GHz -40.24 dBm -100 Centre: 3.526080 GHz Atten: 10 dB Span: 100.000000 kHz...

  • Page 44: Gps Troubleshooting

    2366i (RM-155) RF Description and Troubleshooting GPS Troubleshooting GPS RF Block Diagram IF = 4.092MHz Filter Filter Rx Data Baseband Synthesiser Ref Clk TCXO TRF5101 16.368MHz GPS RF Cellular Baseband Figure 42: GPS block diagram GPS RF Schematic The following schematic is for general reference only. See the Schematics chapter for a detailed version.

  • Page 45: Gps Troubleshooting Setup

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting GPS Troubleshooting Setup Use the following steps to set up GPS signal using Phoenix. 1. On the Phone Control dialog box, click the LOCAL button in the Phone State area to put the mobile terminal into Local Mode.

  • Page 46: Hw Self Test Failure

    2366i (RM-155) RF Description and Troubleshooting 4. Open the Troubleshooting menu, and click GPS Quick Test. The GPS Control dialog box appears Figure 46: GPS Control dialog box 5. In the Test State field, ensure that Galvanic is selected. 6. Click select Start test.

  • Page 47: Cw (Mode 3) Test Failure

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting CW (Mode 3) Test Failure 1. Check that the signal generator is on and sourcing a signal to the GPS RF input port (X6250). 2. Inspect all GPS RF Circuit elements Inspect all GPS Circuit elements around N6251.

  • Page 48: Gps Rf Troubleshooting Setup

    2366i (RM-155) RF Description and Troubleshooting GPS RF Troubleshooting Setup Use the following steps to troubleshoot the GPS receiver. 1. On the GPS Control dialog box, click Receiver On. Figure 48: Turning on the GPS receiver on the GPS Control dialog box 2.

  • Page 49: Gps Rf Probe Points

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting GPS RF Probe Points All points are 1575.52 MHz, except TCXO GPS LNA out -45 dBm GPS LNA in -63 dBm First RF filter out First RF filter in -65 dBm -62 dBm All points are 1575.52 MHz,...

  • Page 50: Bluetooth Troubleshooting

    2366i (RM-155) RF Description and Troubleshooting Bluetooth Troubleshooting Bluetooth Schematic The schematic in Figure 50 is for general reference only. See the Schematics chapter for a detailed version. Saw Filter Bluetooth ASIC N6000 BT Antenna Figure 50: Bluetooth schematic Test Setup 1 Open the BT/WLAN menu, and click Bluetooth Locals.
  • Page 51 2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting If “No version information available” is displayed in the Version Information window, there may be a Phoenix connection problem, a connection problem between the D2800 processor and the BT ASIC or the BT ASIC is not working. See item 1 in "Bluetooth...

  • Page 52: Test Setup 2

    2366i (RM-155) RF Description and Troubleshooting Test Setup 2 After obtaining the version information, select Run to do a quick check on the BT ASIC. The results of each self-test are displayed in the Self Tests window. If any test fails, BT ASIC is not working properly.

  • Page 53: Test Setup 3

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Test Setup 3 1. After passing the self-test, setup the JBT-3, JBT-9 or a later version BT box. 2. Type the BT box’s device address into the Counterpart BT Device Address window.

  • Page 54: Test Setup 4

    2366i (RM-155) RF Description and Troubleshooting Test Setup 4 If the mobile terminal’s BT sensitivity is not good or the setup is not calibrated (correlated) correctly, the %BER > 0.1% which results in an error. Make sure the setup is good (correlated with a golden mobile terminal), then see Item 2 in "Bluetooth...

  • Page 55: Test Setup 5

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Test Setup 5 If the mobile terminal is placed too far or the BT Tx or the Rx has problem, one of the following error messages is visible. (See Item 2 of "Bluetooth...

  • Page 56: Bluetooth Troubleshooting Flowchart

    2366i (RM-155) RF Description and Troubleshooting Nokia Customer Care Bluetooth Troubleshooting Flowchart Replace BT ASIC (N6000) when a particular row is still not ok at the end of a branch. Before Probing, first perfrom visual inspection of all BT components. Look for solder bridges, tombstone, rotation, and other SMD failures.

  • Page 57: Bluetooth Dc And Rf Probe Points

    2366i (RM-155) Nokia Customer Care RF Description and Troubleshooting Bluetooth DC and RF Probe Points Figure 54 shows the Bluetooth DC and RF probe points. Bluetooth ASIC VDD_CORE Xtal_in SAW Filter 19.2MHz Figure 54: Bluetooth DC and RF Probe points...
  • Page 58 2366i (RM-155) RF Description and Troubleshooting Nokia Customer Care This page intentionally left blank. Page 58 Company Confidential Issue 2 - February 2007...

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