Nokia 6260 RM-25 Service Manual page 176

RM-25
Nokia Customer Care RF troubleshooting
Figure 118 RX Channel Select Filter Calibration...................................................................................................................7–19
Figure 119 RX calibration (Example)......................................................................................................................................7–20
Figure 120 RX calibration with band EGSM900 (Example)...............................................................................................7–21
Figure 121 RX calibration values (Example).........................................................................................................................7–21
Figure 122 TX RF block diagram...............................................................................................................................................7–22
Figure 123 Upper and lower shielding cans.........................................................................................................................7–23
Figure 124 Preparing for transmitter troubleshooting....................................................................................................7–24
Figure 125 TX-BB interface troubleshooting and control signals.................................................................................7–25
Figure 126 Oscilloscope screen shots.....................................................................................................................................7–26
Figure 127 RF side of transmitter troubleshooting...........................................................................................................7–27
Figure 128 Oscilloscope screen shots (RF)............................................................................................................................7–28
Figure 129 RF controls.................................................................................................................................................................7–29
Figure 130 Tx IQ tuning..............................................................................................................................................................7–29
Figure 131 Phoenix set-up (Tx IQ Tuning windows).........................................................................................................7–30
Figure 132 Spectrum analyzer screen shot when performing IQ tuning, part 1......................................................7–31
Figure 133 Spectrum analyzer screen shot when performing IQ tuning, part 2......................................................7–32
Figure 134 Phoenix menu select (Tx Power Level Tuning menu).................................................................................7–33
Figure 135 Phoenix Power Level Tuning menu..................................................................................................................7–34
Figure 136 Phoenix screen shot (Tx Power Level Tuning)...............................................................................................7–35
Figure 137 Spectrum analyzer screen shot during power level tuning......................................................................7–36
Figure 138 Testpoints of the main board 1fsa_09a, top part.........................................................................................7–37
Figure 139 Testpoints of the main board 1fsa_11a, top part.........................................................................................7–38
Figure 140 Testpoints of the main board, bottom part...................................................................................................7–39
Figure 141 Synthesizer block diagram..................................................................................................................................7–40
Figure 142 Rf key component...................................................................................................................................................7–41
Figure 143 Synthesizer key components without shielding frames............................................................................7–42
Figure 144 Preparation for troubleshooting using Phoenix RF control setup..........................................................7–43
Figure 145 Troubleshooting chart for synthesizer............................................................................................................7–44
Figure 146 Bluetooth component placement.....................................................................................................................7–45
Figure 147 Phoenix settings for Bluetooth troubleshooting..........................................................................................7–46
Figure 148 Bluetooth troubleshooting..................................................................................................................................7–47
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