User Guide

Table of Contents
General baseband troubleshooting..........................................................................................................................................1–5
Phone is dead.............................................................................................................................................................................1–5
Flash programming do not work.........................................................................................................................................1–6
Easy flash programming does not work............................................................................................................................1–8
Power does not stay on or the phone is jammed...........................................................................................................1–9
Display shows "Contact Service"........................................................................................................................................1–10
The phone does not register to the networks, or the phone can not make a call............................................1–11
SIM related faults..........................................................................................................................................................................1–12
Insert SIM card fault...............................................................................................................................................................1–12
SIM card rejected.....................................................................................................................................................................1–13
User interface.................................................................................................................................................................................1–14
Blank display............................................................................................................................................................................1–14
Display is corrupt....................................................................................................................................................................1–14
Dead keys..................................................................................................................................................................................1–15
No backlight for display or keys.........................................................................................................................................1–15
Audio troubleshooting................................................................................................................................................................1–17
Audio troubleshooting using phoenix.............................................................................................................................1–17
Check microphone using "Hp microphone in Ext speaker out" loop.....................................................................1–18
Check earpiece using "Ext microphone in Hp speaker out" loop.............................................................................1–19
Check IHF & ringing tone function using "Buzzer".......................................................................................................1–19
Check vibra function using "Vibra control".....................................................................................................................1–20
Earpiece fault...........................................................................................................................................................................1–21
IHF/ringing tone fault............................................................................................................................................................1–22
Headset earpiece fault..........................................................................................................................................................1–23
Microphone fault.....................................................................................................................................................................1–24
Headset microphone fault...................................................................................................................................................1–25
List of Figures
Figure 1 Phone is dead troubleshooting.................................................................................................................................1–6
Figure 2 Flash programming fault.............................................................................................................................................1–7
Figure 3 Easy flash programming fault....................................................................................................................................1–9
Figure 4 Power does not stay on or the phone is jammed.............................................................................................1–10
Figure 5 Troubleshooting when the "Contact Service" message is seen....................................................................1–11
Figure 6 No registering or call..................................................................................................................................................1–12
Figure 7 Insert SIM card fault....................................................................................................................................................1–13
Figure 8 Signal diagram.............................................................................................................................................................1–13
Figure 9 Signal diagram.............................................................................................................................................................1–14
Figure 10 Blank display...............................................................................................................................................................1–14
Figure 11 Display is corrupt.......................................................................................................................................................1–15
Figure 12 Dead keys.....................................................................................................................................................................1–15
Figure 13 No backlight for display or keys...........................................................................................................................1–16
Figure 14 Phoenix audio test window...................................................................................................................................1–17
Figure 15 PWB audio test points.............................................................................................................................................1–18
Figure 16 Test arrangement for microphone......................................................................................................................1–19
Figure 17 Test arrangement for earpiece.............................................................................................................................1–19
Figure 18 Checking IHF and ring tone by using "Buzzer".................................................................................................1–20
Figure 19 Checking vibra function by using vibra control...............................................................................................1–20
Figure 20 Earpiece fault flow chart.........................................................................................................................................1–21
Figure 21 IHF/ringing tone fault flow chart.........................................................................................................................1–22
RH-70
Baseband troubleshooting Nokia Customer Care
9243364 (Issue 1, Part 2) Company Confidential Page 1–3
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