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 3610 fold Service Manual Structure
- 1 General information
- 2 Service Tools and Service Concepts
- 3 BB Troubleshooting and Manual Tuning Guide
- General BB troubleshooting guidelines
- Phoenix self tests
- ST_CURRENT_CONS_TEST troubleshooting
- ST_SLEEPCLK_FREQ_TEST troubleshooting
- ST_SLEEP_X_LOOP_TEST troubleshooting
- ST_UEM_CBUS_IF_TEST troubleshooting
- Power and charging troubleshooting
- Interface troubleshooting
- User interface troubleshooting
- Camera module troubleshooting
- Audio troubleshooting
- Bluetooth troubleshooting
- Baseband manual tuning guide
- 4 RF troubleshooting
- 5 System Module
- Glossary
Figure 23 Bluetooth interface
The Bluetooth has a separate built in antenna and is powered by VBAT and the regulated voltage VIO. For
audio applications the Bluetooth has a PCM data bus. In addition a UART (universal asynchronous receiver/
transmitter) is used for data communication and controls.
RF description
Receiver (RX)
An analogue signal is received by the phone's antenna. The signal is converted to a digital signal and is then
transferred further to the baseband (eg. to the earpiece).
The receiver functions are implemented in the RF ASIC.
Signals with different frequencies take different paths, therefore being handled by different components.
Transmitter (TX)
The digital baseband signal (eg. from the microphone) is converted to an analogue signal, which is then
amplified and transmitted from the antenna. The frequency of this signal can be tuned to match the bandwith
of the system in use (eg. GSM900).
RM-429
System Module
Issue 1 COMPANY CONFIDENTIAL Page 5 –17
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