Nokia Customer Care 6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Series Transceivers Troubleshooting — Antenna Issue 1 - Revision 002 09/2004 Company Confidential ©2004 Nokia Corporation
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Contents Nokia Customer Care Page Introduction ..................................................................................................................................................... 3 Visual Quality Requirements .................................................................................................................... 3 Whip Antenna...............................................................................
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Nokia Customer Care Introduction The 6015/6015i/6016i/6019i, and 6012 incorporate a dual-band, internal/whip antenna combination. This antenna arrangement is used for both AMPS/CELL and PCS frequency bands. The whip is capacitively coupled to the internal antenna when extended.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Nokia Customer Care Cap Telescopic tube Wire Plug Bottom stopper Figure 1: Whip assembly Internal Antenna Following are the minimum acceptable visual quality requirements of the internal antenna assembly: • Gloves must be used when handling antennas. Do not touch the antenna radiator with bare hands. • No visual cracks or mechanical defects. • No oil, dirt, or particles are present on the parts.
Nokia Customer Care 6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Failures and Corrective Measures Figure 2: Back view with the whip retracted (left) and whip extended (right) Note in Figure 2 that when the whip is properly installed, the cap clicks into the D-cover when the whip is fully retracted. Antenna Position into D-cover The internal antenna and whip are assembled into the D-cover as shown in Figure 3. The whip must be inserted prior to inserting the internal antenna.
015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Nokia Customer Care Internal antenna Whip antenna Figure 3: D-cover assembly • If the internal antenna is missing, install one. If the radiator looks obviously damaged, then replace the internal antenna. • If the whip is missing, then remove the internal antenna, install a whip, and reinstall the internal antenna.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Nokia Customer Care Damaged RF Feed or Ground Pins The main antenna and the GPS antenna have pins (spring clips) that should properly touch the PWB. If the RF feed pin of the main antenna does not touch the PWB, the antenna gain will degrade by more than 25 dB and the GPS antenna will be detuned.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Nokia Customer Care Figure 6: Top view of the 6015/6015i/6016i/6019i, and 6012 internal antenna Figure 7 shows the antennas for the 2285, 2270, 2275 and the 2280 phones. Ensure that these antennas are not installed.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Nokia Customer Care Obstructed IHF Speaker, RF Feed, and Ground Pads RF feed pad for GPS antenna Ground pad for GPS antenna IHF speaker pads Ground pad for main antenna RF feed pad for main antenna Bottom antenna clip Figure 8: PWB layout of IHF speaker, RF feed, and ground pads, as well as the bottom antenna clip If any of the RF feed or ground pins are obstructed, removed, or covered, then the RF pin will not touch the PWB and t
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Nokia Customer Care Broken or Missing Bottom Antenna Clip If the bottom antenna clip does not contact the whip stopper when the whip is fully retracted, the internal antenna gain will degrade by about 4-5dB at Cell band and 3-10dB at PCS band. Figure 9: Bottom antenna clip • If the antenna clip is installed backwards, is damaged, or is missing, then install a new bottom antenna clip in the correct position.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Nokia Customer Care • If the whip stopper is corroded or blocked by the whip straw, replace the whip assembly. • If the whip stopper is obstructed or dirty, remove the obstruction and/or dirt. Grounding of Display Frame Note that the display frame is grounded to the PWB through the two ground clips. The grounding of the display frame impacts the radiation performance of the phone.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Nokia Customer Care Figure 13: View of display ground clip in assembled phone with A-cover removed Misinstalled Whip The whip is locked into the D-cover when the internal antenna frame is installed. There is a feature in the plastic frame of the internal antenna that interlocks with the locking feature of the whip.
Nokia Customer Care 6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Damaged Whips Figure 15 shows what the whip should look like when it is retracted and extended. If the whip is damaged, replace it. Figure 15: Whip stand-alone in retracted and extended positions Detuning Circuit for Bottom Antenna Clip Figure 9 on page 10 shows the bottom antenna clip. The detuning circuit is right next to the bottom antenna clip.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Nokia Customer Care Testing the CDMA Antenna Calibration Factors Define the AMS RF coupler CPL-8 calibration numbers using the test adapter MJF-28. Obtain the calibration numbers by utilizing a phone with known RF and antenna performance. Each test adapter should only require a single calibration on PCS1900 and GPS bands at used test frequencies.
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20) Troubleshooting — Antenna Nokia Customer Care Testing GPS Antenna (6015i/6016i/6019i) Calibration Factor for GPS In GPS test mode 3, the GPS receiver is fed with a CW signal. The GPS receiver should report C/No ratio of 35 dBHz with a -110 dBm signal level on the RF connector (-110 dBm + cable loss) at signal generator output. The reported C/No figure is recorded with the signal fed to the RF connector. The C/No value is read with a coupler engaged.
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