Nokia 3806, Руководство по обслуживанию

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RM-583
Antenna Description and Troubleshooting
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Introduction
RM-583 includes two internal antennas. One is for cellular frequency bands and this internal antenna assembly
adopts PIFA Antenna structure for the cellular engine, the other is for Bluetooth module, a PIFA antenna too,
Visual quality requirements
Below are the minimum acceptable visual quality requirements of the internal antenna assembly:
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Wear gloves to assemble the antenna. Don’t touch the antenna radiator with bare hands.
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No visual cracks or mechanical defects.
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No oil, dirt or particles attached on the parts.
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Radiator must be flat without warping and aligned with the plastic housing.
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The length of all pins must be identical and the pins align.
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Failures and corrective measures
The two antennas are assembled into B Cover as shown in Figure 1. If no internal antenna is installed, the
antenna gain is degraded by more than 20 dB.
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If the internal antenna is missing, install antenna-asm Module.
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If the radiator is damaged, replace it with a new antenna-asm Module.
Figure 1: B Cover Assembly
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