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
The SIM interface is powered up when the SIMCardDet signal indicates ”card in”. This signal is derived from
the BSI signal.
Table 12 SIM interface
Pin Name Parameter Min Typ Max Unit Notes
4 DATA 1.8V Voh 0.9xVSI
M
VSIM V SIM data (output)
1.8V Vol 0 0.15xVSIM
3V Voh 0.9xVSI
M
VSIM
3V Vol 0 0.15xVSIM
1.8V Vih 0.7xVSI
M
VSIM V SIM data (input)
1.8V Vil 0 0.15xVSIM Trise/Tfall max
1us
3V Vil 0.7xVSI
M
VSIM
3V Vil 0 0.15xVSIM
5 NC Not connected
6 GND GND 0 0 V Ground
VSIM specified in regulator section in this document
Figure 109 SIM interface block diagram
RM-394; RM-395; RH-118
System Module
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