Nokia 2255 Antenna Description And Troubleshooting
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Also See for 2255:
- User manual (54 pages) ,
- Manual (50 pages) ,
- Baseband description and troubleshooting (44 pages)
Related Manuals for Nokia 2255
Summary of Contents for Nokia 2255
- Page 1 Nokia Customer Care 2255 (RM-97) Mobile Terminal Antenna Description and Troubleshooting ©2005 Nokia Corporation ISSUE 1 10/2005 Company Confidential...
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Page 2: Table Of Contents
2255 (RM-97) Antenna Description and Troubleshooting Contents Page Introduction ..............................3 Stub Antenna ..............................3 Failures and Corrective Measures ......................4 Installing the stub antenna ........................4 Uninstalling the stub antenna ......................... 5 Damaged RF Feed Pin ..........................6 Obstructed RF feed pad or missing matching circuit..............6 ©2005 Nokia Corporation... -
Page 3: Introduction
2255, and discusses methods for correction of these failures. Stub Antenna The 2255 uses a single band stub antenna for CDMA CELL band. The antenna radiator is a flex meander that is wrapped around a plastic connector and overmolded. -
Page 4: Failures And Corrective Measures
2255 (RM-97) Antenna Description and Troubleshooting Failures and Corrective Measures Installing the stub antenna Figure 2 shows the assembly of the stub antenna into the D-cover. Figure 2: Installing a stub antenna If no stub antenna is installed, the antenna gain will be degraded by more than 25 dB. -
Page 5: Uninstalling The Stub Antenna
2255 (RM-97) Nokia Customer Care Antenna Description and Troubleshooting Whip/Stub antenna Figure 4: Antenna locked into D-cover and plastic loop in C-cover Uninstalling the stub antenna During disassembly of the mobile terminal, the antenna needs to be uninstalled first. To uninstall an antenna, a special extraction tool is needed. -
Page 6: Damaged Rf Feed Pin
2255 (RM-97) Antenna Description and Troubleshooting Damaged RF Feed Pin The stub antenna has a spring clip feed contact that should properly touch the PWB. Positioning of this pin is shown in Figure • If the RF feed pin is broken or bent the pin will not touch the PWB and the stub antenna must be replaced.