N500 Helgo Troubleshooting - Nokia RM-14 Rf Troubleshooting And Manual Tuning

RM-14
RF Troubleshooting and Manual Tuning
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N500 Helgo troubleshooting

Measure N500 Helgo supply voltages:
- VR1 at C551 - 4,75V?
-VR1 at C516 - 4,75V?
- VR2 at C520 - 2,8V?
-VR2 at C510 - 2,8V?
- VR3 at C503 - 2,8V?
-VR3 at C522 - 2,8V?
- VR4 at C554 - 2,8V?
-VR4 at C520 -2,8V?
- VR5 at C553 - 2,8V?
-VR5 at C518 -2,8V
- VR6 at C555 - 2,8V?
-VR6 at C521 -2,8V?
- VR7 at C297 - 2,8V? (located at BB bottom grid S3)
-VR7 at C500 -2,8V?
ISSUE 1 11/04
N500 HELGO troubleshooting
Set Phoenix to RF local burst RX mode
Measure N500 reference voltage:
VrefRF01 = 1,35V (C549)
1,44V
Measure N500 serial bus signals
- RfBusClk at J501
- RfBusEna1 at J502
- Reset at J503
- RfBusData at J509
All measured in Burst Mode
.
Logic high level = 1,8V.
Check baseband.
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