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
Backlight troubleshooting
Context
The device has one LED driver that provides current for both the display and keyboard backlights. Brightness
can be adjusted manually, and it affects both the display and keypad. Keyboard backlights can be turned ON/
OFF separately but not without switching on the display lights.
Display and keyboard backlight troubleshooting
RM-272; RM-273
BB Troubleshooting and Manual Tuning Guide
Issue 1 COMPANY CONFIDENTIAL Page 3 –23
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