Nokia 5510 - Page 72

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UI Module Troubleshooting PAMS Technical Documentation
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• U301 MCU
• U101 DSP
• U201 NAND Memory
• U401 USB
Diagnostic Tests:
• Check presence of VBAT, VBB and UC_VCC, DVCC, AVCC, CVCC,
USB_VCC (Table 7, “UI module voltages,” on page 73)
• Check operating current during USB mode (Table 8, “UI current consumption
in normal conditons,” on page 73).
• Check presence of clock frequency 32.768kHz @ U301-Pin9 using oscillo-
scope (Table 47, “MCU Clock Waveform – 32.768kHz,” on page 74).
• Check presence of clock frequency 11.9952MHz @ U101-Pin97 and U601-
Pin25 (Table 48, “DSP Clock Waveform – 11.9952MHz,” on page 75).
• Check presence of clock frequency 6MHz @ U403-Pin4 (Table 50, “USB
Clock Waveform – 6MHz,” on page 77).
• Connect USB cable to UI USB socket and check signal line USB_DET_INT @
U301-Pin24 (Table 9, “Accessories connection indication,” on page 73)
• Observe on the PC Windows’s Explore that “Removable Disk” appear.