Fmtx2.1 Si4713 Visual Inspection Troubleshooting; Checking Validity Of Signals - Nokia RM-506 Service Manual

RM-505; RM-506
FMTx 2.1 Troubleshooting

FMTx2.1 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
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