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
Figure 24 4-pole jack plug for audio accessory
Table 6 Connector for External Audio Accessories
Pin Signal name Direction Description
5 PLUGDET Input Terminal internal
connection, plug
detection
4 HS EAR L Output Audio output
3 HS EAR R Output Audio output
2 HS MIC Input Multiplexed
microphone audio and
control data
1 HS GND - Ground contact
Check microphone using "Hp microphone in Ext speaker out" loop
Steps
1. Connect phone with Phoenix.
2. Open “audio test” window from “Testing -> Audio test”, as shown in
Figure Phoenix audio test window
above.
3. Select “Hp microphone in Ext speaker out”
4. Select "Acc. Detection" as "Off".
5. Select “Loop” as “On”
6. Input sound at microphone port, for example 94dB SPL 1kHz.
RM-394; RM-395; RH-118
Baseband Troubleshooting Instructions
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