Nokia RM-497 Service Manual page 48

• The 32 kHz crystal is connected to the N2201 PMU and is transmitted to the D2800 Juno BB ASIC.
• The 26 MHz crystal is connected directly to the D2800 Juno BB ASIC. The D2800 Juno BB ASIC can output
four copies of the 26 MHz input clock from it's CK1, CK2, RF_XON, and RF_XOP pins, however, only the RF_XON
output is used.
Note: All test-points are located under the RF shielding.
1) 32 kHz crystal (B2200)
The 32 kHz clock to the N2201 Loviisa can be tested by setting the oscilloscope probe on R2209.
2) 26 MHz crystal (B2800)
• The 26 MHz clock to the D2800 Juno can be tested by setting the oscilloscope probe on B2800.
• The RF_XON output clock can be tested by probing C6094 near the BT/FM module.
Note: This step will require the RF_XON output clock for BT/FM module to be enabled through
Phoenix SW.
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BB Troubleshooting and Manual Tuning Guide
RM-497
Issue 1