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
Phone cannot be powered on (II)
Context
If this kind of failure is presenting itself immediately after FLALI, it is most likely caused by ASIC's missing
contact with PWB.
If the MCU doesn’t service the watchdog register within the UEMCLite, the operations watchdog will run out
after approximately 32 seconds. Unfortunately, the service routine can not be measured.
Troubleshooting flow
Figure 15 Troubleshooting when phone does not stay on or phone is jammed
RM-394; RM-395; RH-118
Baseband Troubleshooting Instructions
Issue 1 COMPANY CONFIDENTIAL Page 3 –9
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