VDD-MAIN level
Check the Vref level (2.85 V) at output. If it is not ok, check C7510, C7511, C7514, C7517, C7519 respectively.
If still have trouble, check R7532, PD N7540 Pin A2. If not, then check C7595, C2227. At last, check P2800.
VDD-FSYS level
Check the VDD-FSYS level (2.85 V) at output. If not, check C7524.
RF tuning and testing
RF auto tuning and testing with Nokia Care Suite
Introduction to cellular RF tunings
The cellular RF engine has been tuned correctly in production. There is no reason to do re-calibration unless
one or more of the RF components are changed or memory (D3000) is corrupted. The device can be tuned
automatically. Auto tuning is designed to align the phone's RF part easily and faster. It performs calibrations,
tunings and measurements of RX and TX. The results are displayed and logged in a result file, if initiated.
Note: Always perform RF tuning with the help of the module jig, never with RF couplers. Using an
RF coupler in the tuning phase will cause a complete mistuning of the RF part.
Important: After RF component changes, always perform cellular RF auto tuning.
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 the RF losses are frequency dependent, the user has to act very carefully and understand the measurement
setup. For RF attenuations of the RF cable, please refer to section 'Service Tools and Service Concepts'.
Hardware set up
For hardware requirements for auto tuning, please refer to RF testing and BB/RF tuning concept with module
jig in section 'Service Tools and Service Concepts'. Please make sure that cellular RF connectors connected
before voltage is applied to the phone.
Nokia Care Suite preparations
Install Testing And Tuning Tool add-on application to Nokia Care Suite. Automatic RF testing and tuning is
not possible without this application. There is no more support in Phoenix to auto tune Quark product. Install
the phone specific data package. This defines phone specific settings.
RF auto tuning procedure
1 Make sure the phone (in the module jig) is connected to the PC.
2 Connect RF cables.
3 Start
Nokia Care Suite T&TT
. The following window opens:
RM-839; RM-840; RM-841
Cellular RF troubleshooting
Issue 1 NOKIA INTERNAL USE ONLY Page 4 – 9
Copyright © 2013 Nokia. All rights reserved.
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