Nokia 6600 slide, Руководство по обслуживанию

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one or more of the RF components have been replaced
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flash memory chip is replaced or corrupted.
RF calibration is always performed with the help of a product-specific module jig, never with an RF coupler.
Using an RF coupler in the calibration phase will cause a complete mistuning of the RF part.
Important: After RF component replacements, always use autotuning. Manual tunings are only
required in rare cases.
Cable and adapter losses
RF cables and adapters have some losses. They have to be taken into account when the phone is tuned. As
all RF losses are frequency dependent, the user has to act very carefully and understand the measurement
setup.
Autotuning for BB5
This phone can be tuned automatically.
Autotune is designed to align the phone's RF part easier and faster. It performs calibrations, tunings and
measurements of RX and TX. The results are displayed and logged in a result file, if initiated.
Hardware set up
Hardware requirements for auto tuning:
•
PC (Windows 2000/XP) with GPIB card
•
Power supply
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Product specific module jig
•
Cables: XRS-6 (RF cable that requires an additional product-specific adapter cable), USB cable, GBIP cable
and DAU-9S
•
Signal analyser (TX), signal generator (RX) and RF-splitter
or
one device including all.
Figure 24 Auto tuning concept with CMU200
Phoenix preparations
Install the phone-specific data package. This defines the phone-specific settings.
Auto tuning procedure
1 Make sure the phone (in the jig) is connected to the equipment. Else, some menus will not be shown in
Phoenix.
RM-414; RM-570
RF troubleshooting
Page 4 –28 COMPANY CONFIDENTIAL Issue 2
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