Nokia 3710 fold, Руководство по обслуживанию

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Table of Contents
General RF troubleshooting .................................................................................................................................. 4–5
Introduction to RF troubleshooting ................................................................................................................ 4–5
RF key components ........................................................................................................................................... 4–6
Auto tuning ............................................................................................................................................................. 4–6
Introduction to auto tuning ............................................................................................................................. 4–6
Auto tuning procedure ..................................................................................................................................... 4–7
Self test troubleshooting ....................................................................................................................................... 4–7
Phoenix self test troubleshooting ................................................................................................................... 4–7
Receiver troubleshooting ...................................................................................................................................... 4–9
Introduction to receiver (RX) troubleshooting ............................................................................................... 4–9
GSM RX chain activation for manual measurements/GSM RSSI measurement ........................................... 4–9
GSM receiver troubleshooting flowchart ..................................................................................................... 4–10
WCDMA RX chain activation for manual measurement .............................................................................. 4–11
WCDMA RSSI measurement ........................................................................................................................... 4–12
WCDMA receiver troubleshooting flowchart ................................................................................................ 4–13
Transmitter troubleshooting ............................................................................................................................. 4–14
Introduction to transmitter (TX) troubleshooting ...................................................................................... 4–14
GSM transmitter troubleshooting ................................................................................................................. 4–14
GSM transmitter troubleshooting flowchart ............................................................................................... 4–18
WCDMA transmitter troubleshooting ........................................................................................................... 4–19
WCDMA transmitter troubleshooting flowchart .......................................................................................... 4–22
Troubleshooting with RF shield removed ......................................................................................................... 4–23
Introduction .................................................................................................................................................... 4–23
Voltage checking ............................................................................................................................................ 4–23
VCTCXO troubleshooting ................................................................................................................................ 4–25
RF component reference ............................................................................................................................... 4–25
Antenna ................................................................................................................................................................ 4–26
Antenna overview .......................................................................................................................................... 4–26
Main antenna functionality ........................................................................................................................... 4–27
Bluetooth antenna functionality .................................................................................................................. 4–27
GPS antenna functionality ............................................................................................................................. 4–28
Antenna troubleshooting .............................................................................................................................. 4–28
List of Figures
Figure 17 RF key components - bottom ............................................................................................................... 4–6
Figure 18 Auto tuning concept with CMU200 ...................................................................................................... 4–7
Figure 19 Phoenix RSSI Reading window ............................................................................................................ 4–9
Figure 20 Phoenix Rx Control window with sample settings (WCDMA band I) ............................................. 4–11
Figure 21 Phoenix Rx Power Measurement window ....................................................................................... 4–12
Figure 22 Phoenix RF Controls window ............................................................................................................ 4–14
Figure 23 Typical readings ................................................................................................................................. 4–16
Figure 24 Phoenix WCDMA Tx control window ................................................................................................ 4–19
Figure 25 Typical readings ................................................................................................................................. 4–21
Figure 26 Test points for voltage checking ...................................................................................................... 4–24
Figure 27 Component reference schematics .................................................................................................... 4–26
Figure 28 Antenna contacts ............................................................................................................................... 4–27
Figure 29 BT antenna .......................................................................................................................................... 4–28
Figure 30 GPS antenna and main antenna contact clips ................................................................................. 4–28
RM-509; RM-510; RM-511
RF Troubleshooting
Issue 2 COMPANY CONFIDENTIAL Page 4 –3
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