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 3500c Service Manual Structure
- 1 General information
- 2 Service Tools and Service Concepts
- 3 BB Troubleshooting and Manual Tuning Guide
- Baseband troubleshooting overview
- Power and charging troubleshooting
- Interface troubleshooting
- User interface troubleshooting
- Audio troubleshooting
- Introduction to acoustics troubleshooting
- Audio troubleshooting test instructions
- Earpiece troubleshooting
- Internal earpiece troubleshooting
- External headset earpiece troubleshooting
- IHF troubleshooting
- IHF troubleshooting
- Microphone troubleshooting
- Internal microphone troubleshooting
- External headset microphone troubleshooting
- Connections troubleshooting
- Baseband manual tuning guide
- 4 RF Troubleshooting and Manual Tuning Guide
- 5 System module
- Glossary
Tx IQ tuning must be performed for all GSM bands.
Steps
1. Start
Phoenix
service software.
2. From the Operating mode drop-down menu, set mode to Local.
3. Choose Tuning→GSM→Tx IQ Tuning .
4. Select Mode: Automatic.
5. Select band GSM850 or GSM900 and click Start.
6. Click Next to start GSM1800 band TX IQ tuning.
7. Click Next to start GSM1900 band TX IQ tuning.
8. ClickFinish and then Close.
Next actions
Tuning sliders should be close to the center of the scale after the tuning and within the limits specified in
the following table. If they are not within the limits, check Tx IQ quality manually.
Min Typ Max Unit
GSM850
I DC offset / Q DC
offset
-6 -4 6 %
Ampl -1 0 1 dB
Phase 85 90 95 °
GSM900
RM-272; RM-273
RF Troubleshooting and Manual Tuning Guide
Issue 1 COMPANY CONFIDENTIAL Page 4 –31
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