Nokia 2626 - Cell Phone - GSM, Service Manual

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Table of Contents
General baseband troubleshooting ...................................................................................................................... 6–5
Phone is dead .................................................................................................................................................... 6–5
Flash programming does not work ................................................................................................................. 6–7
Easy flash programming does not work ......................................................................................................... 6–9
Power does not stay on or the phone is jammed ....................................................................................... 6–11
Display shows "Contact Service" ................................................................................................................... 6–12
The phone does not register to the networks, or the phone can not make a call .................................. 6–13
SIM related faults ................................................................................................................................................. 6–15
Insert SIM card fault ....................................................................................................................................... 6–15
SIM card rejected ............................................................................................................................................ 6–16
User interface ....................................................................................................................................................... 6–16
Blank display ................................................................................................................................................... 6–16
Display is corrupt ............................................................................................................................................ 6–17
Dead keys ........................................................................................................................................................ 6–17
No backlight for display or keys ................................................................................................................... 6–18
Audio troubleshooting ........................................................................................................................................ 6–20
Audio troubleshooting using phoenix ......................................................................................................... 6–20
Check microphone using "Hp microphone in Ext speaker out" loop ........................................................ 6–21
Check earpiece using "Ext microphone in Hp speaker out" loop .............................................................. 6–22
Check IHF & ringing tone function using "Buzzer" ...................................................................................... 6–22
Check vibra function using "Vibra control" .................................................................................................. 6–23
Earpiece fault .................................................................................................................................................. 6–24
IHF/ringing tone fault .................................................................................................................................... 6–25
Headset earpiece fault ................................................................................................................................... 6–26
Microphone fault ............................................................................................................................................ 6–27
Headset microphone fault ............................................................................................................................. 6–28
List of Figures
Figure 71 Phone is dead troubleshooting ........................................................................................................... 6–6
Figure 72 Flash programming fault ...................................................................................................................... 6–8
Figure 73 Easy flash programming fault ........................................................................................................... 6–10
Figure 74 Power does not stay on or the phone is jammed ........................................................................... 6–12
Figure 75 Troubleshooting when the "Contact Service" message is seen .................................................... 6–13
Figure 76 No registering or call ......................................................................................................................... 6–14
Figure 77 Insert SIM card fault ........................................................................................................................... 6–15
Figure 78 Signal diagram ................................................................................................................................... 6–16
Figure 79 Signal diagram ................................................................................................................................... 6–16
Figure 80 Blank display ....................................................................................................................................... 6–17
Figure 81 Display is corrupt ................................................................................................................................ 6–17
Figure 82 Dead keys ............................................................................................................................................ 6–18
Figure 83 No backlight for display or keys ....................................................................................................... 6–19
Figure 84 Phoenix audio test window .............................................................................................................. 6–20
Figure 85 PWB audio test points ....................................................................................................................... 6–21
Figure 86 Test arrangement for microphone ................................................................................................... 6–21
Figure 87 Test arrangement for earpiece ......................................................................................................... 6–22
Figure 88 Checking IHF and ring tone by using "Buzzer" ................................................................................ 6–22
Figure 89 Checking vibra function by using vibra control .............................................................................. 6–23
Figure 90 Headset earpiece fault flow chart .................................................................................................... 6–26
Figure 91 Microphone fault flow chart .............................................................................................................. 6–27
RM-291
Baseband troubleshooting Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 6 –3
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