Table of Contents
General baseband troubleshooting
Flash programming does not work
Display shows "Contact Service"
The phone does not register to the networks, or the phone can not make a call
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No backlight for display or keys
Audio troubleshooting using phoenix
Check microphone using "Hp microphone in Ext speaker out" loop
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Check earpiece using "Ext microphone in Hp speaker out" loop
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Check IHF function using "Ext microphone in IHF speaker out" loop
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Check vibra function using "Vibra control"
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List of Figures
Figure 8 Test points for power suppliers
Figure 9 Flash programming fault
Figure 10 Troubleshooting when the phone doesn't switch on
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Figure 11 Switch off troubleshooting
Figure 12 Troubleshooting when the "Contact Service" message is seen
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Figure 13 No registering or call
Figure 14 Insert SIM card fault
Figure 20 No backlight for display or keys
Figure 21 Phoenix audio test window
Figure 22 PWB audio test points
Figure 23 Test arrangement for microphone
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Figure 24 Test arrangement for earpiece
Figure 25 Checking IHF function by using "Ext microphone in IHF speaker out" loop
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Figure 26 Checking vibra function by using vibra control
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Figure 27 Earpiece fault flow chart
Figure 28 IHF/ring tone fault flow chart
Figure 29 Microphone fault flow chart
RH-99; RH-100; RH-105; RH-106
Baseband troubleshooting
Issue 2
COMPANY CONFIDENTIAL
Page 4 –3
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