Nokia 7230, Service Manual

Page: 105 / 166

Table of Contents
General RF troubleshooting .................................................................................................................................. 4–5
Introduction to RF troubleshooting ................................................................................................................ 4–5
RF key components ........................................................................................................................................... 4–6
Auto tuning ............................................................................................................................................................. 4–8
Introduction to auto tuning ............................................................................................................................. 4–8
Auto tuning procedure ..................................................................................................................................... 4–8
Self test troubleshooting ....................................................................................................................................... 4–9
Phoenix self test troubleshooting ................................................................................................................... 4–9
Receiver troubleshooting ................................................................................................................................... 4–11
Introduction to receiver (RX) troubleshooting ............................................................................................ 4–11
GSM RX chain activation for manual measurements/GSM RSSI measurement ........................................ 4–11
GSM receiver troubleshooting flowchart ..................................................................................................... 4–12
WCDMA RX chain activation for manual measurement .............................................................................. 4–13
WCDMA RSSI measurement ........................................................................................................................... 4–14
WCDMA receiver troubleshooting flowchart ................................................................................................ 4–15
Transmitter troubleshooting ............................................................................................................................. 4–16
Introduction to transmitter (TX) troubleshooting ...................................................................................... 4–16
GSM transmitter troubleshooting ................................................................................................................. 4–16
GSM transmitter troubleshooting flowchart ............................................................................................... 4–20
WCDMA transmitter troubleshooting ........................................................................................................... 4–21
WCDMA transmitter troubleshooting flowchart .......................................................................................... 4–24
Troubleshooting with RF shield removed ......................................................................................................... 4–25
Introduction .................................................................................................................................................... 4–25
Voltage checking ............................................................................................................................................ 4–25
VCTCXO troubleshooting ................................................................................................................................ 4–27
RF component reference ............................................................................................................................... 4–27
Antenna ................................................................................................................................................................ 4–29
Antenna overview .......................................................................................................................................... 4–29
Main antenna functionality ........................................................................................................................... 4–30
Bluetooth antenna functionality .................................................................................................................. 4–31
Antenna troubleshooting .............................................................................................................................. 4–31
List of Tables
Table 11 RM-598 RF component reference ....................................................................................................... 4–27
Table 12 RM-604 RF component reference ....................................................................................................... 4–28
List of Figures
Figure 13 RM-598 RF key components - bottom ................................................................................................. 4–6
Figure 14 RM-604 RF key components - bottom ................................................................................................. 4–7
Figure 15 Auto tuning concept with CMU200 ...................................................................................................... 4–8
Figure 16 Phoenix RSSI Reading window ......................................................................................................... 4–11
Figure 17 Phoenix Rx Control window with sample settings (WCDMA band I) ............................................. 4–13
Figure 18 Phoenix Rx Power Measurement window ....................................................................................... 4–14
Figure 19 Phoenix RF Controls window ............................................................................................................ 4–16
Figure 20 Typical readings ................................................................................................................................. 4–18
Figure 21 Phoenix WCDMA Tx control window ................................................................................................ 4–21
Figure 22 Typical readings ................................................................................................................................. 4–23
Figure 23 Test points for voltage checking ...................................................................................................... 4–26
RM-598; RM-604
RF Troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 4 –3
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