Nokia 2255 Manual

Also see for 2255: User guide User guide Antenna Description and Troubleshooting Baseband Description and Troubleshooting Disassembly/Assembly

Contents

2255 (RM-97)RF Description and Troubleshooting Nokia Customer CarePage 10 ©2005 Nokia Corporation Company Confidential ISSUE 1 10/2005The RF PDM Control dialog box appears.Figure 8: RF PDM Control dialog box for Cell troubleshooting13. Click Read Phone to update the values.14. Configure the spectrum analyzer using the following values:• Center Frequency = 836.52 MHz• Span = 100 MHz• Amplitude = 20 dBm• Attenuation = Auto• BW = AutoAdjust the following PDM field values on the RF PDM dialog box:• Set PA Gain State to High• Adjust Tx RF AGC PDM to around –250• Adjust Tx IF AGC PDM to around –250• Set Output level to +23dBm on CH-384 and monitor the current between590mA and 660mA.Failed Test: Tx PA Detector1. Use Phoenix to set the phone in Local Mode, and activate the Tx with defaultoutput power. The output power at the RF test connector should read9 dBm +/- 4 dB.2. Use a voltmeter on DC, and probe the detector output at C813. The voltmetershould read approximately 1.4 V. If not, replace the detector (N803).