Nokia RM-840 - Section 4; Table of Contents

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Table of Contents

General instructions for cellular RF troubleshooting......................................................................................... 4–5

Cellular RF key components.................................................................................................................................. 4–5

Cellular RF main troubleshooting ........................................................................................................................ 4–7

RF power supply self test troubleshooting......................................................................................................... 4–8

RF tuning and testing ........................................................................................................................................... 4–9

RF auto tuning and testing with Nokia Care Suite........................................................................................ 4–9

RF auto tuning procedure ............................................................................................................................... 4–9

Automatic RF testing with Nokia Care Suite............................................................................................... 4–11

Troubleshooting with Testing And Tuning Tool ........................................................................................ 4–13

Release variants information....................................................................................................................... 4–17

Antenna............................................................................................................................................................... 4–21

Antenna overview ......................................................................................................................................... 4–21

Main antenna functionality.......................................................................................................................... 4–21

Antenna troubleshooting............................................................................................................................. 4–21

FM radio troubleshooting (DS & SS).................................................................................................................. 4–22

FM radio troubleshooting............................................................................................................................. 4–22

FM radio headset troubleshooting .............................................................................................................. 4–25

Bluetooth Troubleshooting (DS & SS)............................................................................................................... 4–25

Bluetooth functional description (SS) ......................................................................................................... 4–25

Block diagram................................................................................................................................................ 4–26

Interface signals............................................................................................................................................ 4–26

Component placement ................................................................................................................................. 4–27

Symptom, Problem and Repair Solution..................................................................................................... 4–28

Test Coverage ................................................................................................................................................ 4–29

Test Procedure............................................................................................................................................... 4–29

Bluetooth troubleshooting .......................................................................................................................... 4–30

List of Tables

Table 4 Bluetooth Signal List............................................................................................................................. 4–26

List of Figures

Figure 12 3YK_30 Quark RF Rel5 RF Block............................................................................................................ 4–6

Figure 13 3yn_30 Rel4 RF block......................................................................................................................... 4–18

Figure 14 3Yn_30 Rel4 PWB layout ................................................................................................................... 4–19

Figure 15 3yk_30 Rel5 RF Block......................................................................................................................... 4–19

Figure 16 3yk_30 Rel5 PWB layout ................................................................................................................... 4–19

Figure 17 3ym_30 Rel6 RF block........................................................................................................................ 4–20

Figure 18 3ym_30 Rel6 PWB layout.................................................................................................................. 4–20

Figure 19 The version of the PWB layout......................................................................................................... 4–21

Figure 20 FM schematics (DS & SS).................................................................................................................... 4–23

Figure 21 FM components layout (DS & SS) ..................................................................................................... 4–24

Figure 22 Bluetooth block diagram.................................................................................................................. 4–26

Figure 23 Test points in Bluetooth ASIC circuit – BTHFMRDS4.4D.................................................................. 4–28

RM-839; RM-840; RM-841

Cellular RF troubleshooting

Issue 1 NOKIA INTERNAL USE ONLY Page 4 – 3