User Guide
Table Of Contents
- Amendment Record Sheet
- Copyright
- Warnings and cautions
- For your safety
- Care and maintenance
- ESD protection
- Battery information
- Company Policy
- Nokia 1680c; Nokia 1681c Service Manual Structure
- 1 General Information
- 2 Service Tools and Service Concepts
- 3 Baseband Troubleshooting Instructions
- General baseband troubleshooting
- SIM related faults
- User interface
- Audio troubleshooting
- Audio troubleshooting using phoenix
- Check microphone using "Hp microphone in Ext speaker out" loop
- Check earpiece using "Ext microphone in Hp speaker out" loop
- Check IHF & ringing tone function using "Buzzer"
- Check vibra function using "Vibra control"
- Earpiece fault
- IHF/ringing tone fault
- Microphone fault
- Headset earpiece fault
- Headset microphone fault
- 4 RF Troubleshooting Instructions
- 5 Camera Module Troubleshooting (Only for RM-394/RM-395)
- 6 System Module
- Glossary
SIM related faults
Insert SIM card fault
Troubleshooting flow
The hardware of the SIM interface from UEMCLite (D2200) to the SIM connector (X2700) can be tested without
a SIM card. When the power is switched on the phone first check for a 1.8V SIM card and then a 3V SIM card.
The phone will try this four times, where after it will display ”Insert SIM card”.
Figure 20 Insert SIM card fault
RM-394; RM-395; RH-118
Baseband Troubleshooting Instructions
Issue 1 COMPANY CONFIDENTIAL Page 3 –17
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