Nokia 3155 Antenna Description And Troubleshooting
Mobile terminal
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Also See for 3155:
- User manual (201 pages) ,
- Rf description and troubleshooting (68 pages) ,
- Service tools (22 pages)
Related Manuals for Nokia 3155
Summary of Contents for Nokia 3155
- Page 1 Nokia Customer Care 3155/3155i (RM-41), 3152 (RM-61) Mobile Terminal Antenna Description and Troubleshooting ©2005 Nokia Corporation ISSUE 1 07/2005 Company Confidential...
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Page 2: Table Of Contents
3155/3155i (RM-41), 3152 (RM-61) Antenna Description and Troubleshooting Contents Page Introduction ..............................3 Whip Antenna .............................. 3 Failures and Corrective Measures ......................4 Damaged Whips ............................4 Antenna Position into D-cover ......................5 Obstructed RF Feed Pad or Missing Matching Circuit ..............6 Broken or Missing Bottom Antenna Clip or Matching Circuit............. -
Page 3: Introduction
Antenna Description and Troubleshooting Introduction This troubleshooting guide addresses potential failures that affect antenna performance of the 3155/3155i/3152, and discusses methods for correction of these failures. Whip Antenna Check the following minimum visual quality standards of the whip assembly: • No physical cracks or mechanical defects. -
Page 4: Failures And Corrective Measures
3155/3155i (RM-41), 3152 (RM-61) Antenna Description and Troubleshooting Failures and Corrective Measures Figure 2: Whip retracted and whip extended Note in Figure 2 that when the whip is properly installed, the cap clicks into the antenna tower when the whip is fully retracted. When fully extended, the length from the end of antenna tower to the top of the cap must be around 118mm. -
Page 5: Antenna Position Into D-Cover
3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Antenna Description and Troubleshooting Antenna Position into D-cover The internal antenna and whip are assembled into the D-cover as shown in Figure 4. If no internal antenna is installed, the antenna gain will be degraded by more than 25 dB. -
Page 6: Obstructed Rf Feed Pad Or Missing Matching Circuit
3155/3155i (RM-41), 3152 (RM-61) Antenna Description and Troubleshooting Obstructed RF Feed Pad or Missing Matching Circuit If any portion of the upper clip is obstructed, removed, or covered, the antenna connector will not make contact with the PWB and the antenna performance will degrade. -
Page 7: Obstructed Whip Stopper
3155/3155i (RM-41), 3152 (RM-61) Nokia Customer Care Antenna Description and Troubleshooting Bottom matching circuit Bottom clip Figure 7: Bottom antenna clip • If the antenna clip is installed backwards, is damaged, or is missing, install a new bottom antenna clip in the correct position. -
Page 8: Gps Antenna
3155/3155i (RM-41), 3152 (RM-61) Antenna Description and Troubleshooting GPS Antenna The GPS antenna is a ceramic chip soldered on the PWB. It has a matching circuit of series 0R and a shunt inductor of 2.0nH. GPS antenna Matching circuit (opposite side of PWB) Figure 9: Position of the GPS antenna on the PWB •...