User Guide

FMTx2.0 Si4713 visual inspection troubleshooting

Troubleshooting flow

Checking validity of signals

Please refer to Access to signals figure as a reference. Generally all power supply levels and clocks willbe

consistent. Signals on the analogue audio input pins (RIN & LIN – pins 15 and 16 respectively) will be

dependant on the audio content being injected to the device. During the audio self test (initiated from

Phoenix) it is possible to monitor these pins and check that the DSP generated 1KHz tones can be seen at

some point during the test. Check that the signals are clean and that no obvious distortion can be seen such

as clipping of the signals. Typical maximum swing of these tones will be ~636mV peak to peak. The maximum

swing may vary between Nokia handsets but for the FMTx 2.0 implementation, the swing should not be

greater than the aforementioned value.

FMTx2.0 troubleshooting faults

Possible faults

Expected fault reports relating to the FMTx 2.0 implementation may consist of one or more of the following;

RM-348; RM-349; RM-350

FMTx 2.0 Troubleshooting

Issue 2 COMPANY CONFIDENTIAL Page 7 –13