Introduction to BB troubleshooting
The following sections contain guidelines how to identify and correct basic baseband related faults. Access
to normal LAB equipment (power-supply, digital multi-meter and oscilloscope) is a prerequisite for following
the guidelines. Due to the small size of the components and test-points, access to a microscope or magnifying
glass is recommended.
Initial baseband troubleshooting normally involves the measurements of various power supply voltages and
control signals. The location on the most important test-points is indicated in the following figure:
RM-839; RM-840; RM-841
BB Troubleshooting and Manual Tuning Guide
Issue 1 NOKIA INTERNAL USE ONLY Page 3 – 5
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