Nokia 5510 Troubleshooting Manual

Also see for 5510: User guide Owner's guide Repair hints

Contents

Nokia 5510 Troubleshooting Manual Manual pdf 70 page image

NPM-5UI Module Troubleshooting PAMS Technical DocumentationQhtr& Ixvh8hv Dr • U801 FMRDvvhuhhrvprrryuhhyvshyvqMyvrNAHpuhrysyvrvtrvsvphvUurrqvhtvprqrvrhvthytrrhDiagnostic Tests:• Check the stereo headset has proper contact with the UI module since the ste-reo headset is used as antenna to FM signal• Check Music Player function. This will ensure the MCU, DSP, NAND, andAudio Codec are functioning.• Check presence of VBAT, and FM_VCC (Figure 47, “MCU Clock Waveform –32.768kHz,” on page 74).• Check operating current during recording mode (Table 7, “UI module volt-ages,” on page 73).• Connect Stereo headset and check signal line ST_DET @ U301-Pin20(Table 8, “UI current consumption in normal conditons,” on page 73)• Check the presence of 75kHz @ U801-Pin27 (Figure 49, “FMR Clock Wave-form – 75kHz,” on page 76).• Tune the FM to 87.5MHz and 108MHz using the Manual Tuning Menu. Checkthe voltage at C815 and the reading should be 0.9V and 2V respectively.• Check the 3-wire bus FM_WREN (U801-Pin31), FMR_DATA (U801-Pin30)and FMR_CLK (U801-Pin29) lines using oscilloscope. Check for activitieswhen tuning is in progress.• Check for analog audio activities @ C808 and C809 using oscilloscope. Thischeck will verify that the modulated “live” FM signal is successfully demodu-lated by U801.• Check the Audio Routing Select, U602-Pin10 and U602-Pin9 are routed cor-rected (Table 10, “Audio routing select,” on page 73).• Check for analog activities @ U601-Pin19 and U601-Pin20 using oscilloscope.This check will verify that the FM music is successfully routed to the Codec.• Check for analog activities @ U601-Pin9 and U601-Pin10 using oscilloscope.This check will verify that the FM music has successfully by-pass the Codec.AHS Srpqvt ApvIQH$vphhiyrsrpqvtsMyvrNAHhvUurrhvqrvprhrirvtqpqvvsurvpyhrspvry)• U301 MCU• U101 DSP