Nokia RX-44 Service Manual

Also see for NSERIES N810: Service manual User guide Service manual

Nokia RX-44 Service Manual Manual pdf 125 page image

Baseband manual tuning guideEnergy management calibrationPrerequisitesEnergy Management (EM) calibration is performed to calibrate the setting (gain and offset) of AD convertersin several channels (that is, battery voltage, BSI, battery current) to get an accurate AD conversion result.Hardware setup:• An external power supply is needed.• Supply 12V DC from an external power supply to CU-4 to power up the phone.• The phone must be connected to a CU-4 control unit with a product-specific flash adapter.Steps1. Place the phone to the docking station adapter (CU-4 is connected to the adapter).2. StartPhoenix service software.3. Choose File→ Scan Product.4. Choose Tuning→Energy Management Calibration.5. To show the current values in the phone memory, click Read, and check that communication betweenthe phone and CU-4 works.6. Check that the CU-4 used check box is checked.7. Select the item(s) to be calibrated.Note: ADC calibration has to be performed before other item(s). However, if all calibrations areselected at the same time, there is no need to perform the ADC calibration first.8. Click Calibrate.The calibration of the selected item(s) is carried out automatically.The candidates for the new calibration values are shown in theCalculated values column. If the newcalibration values seem to be acceptable (please refer to the following "Calibration value limits" table),click Write to store the new calibration values to the phone permanent memory.Table 10 Calibration value limitsParameter Min. Max.ADC Gain 13000 13350ADC Offset -14 14BSI Gain 1100 1300VBAT Gain 21000 21900VBAT Offset 2450 2570IBAT Gain 7750 122509. Click Read, and confirm that the new calibration values are stored in the phone memory correctly. If thevalues are not stored to the phone memory, click Write and/or repeat the procedure again.10. To end the procedure, close theEnergy Management Calibration window.RX-44BB Troubleshooting and Manual Tuning GuideIssue 1 COMPANY CONFIDENTIAL Page 4 –55Copyright © 2007 Nokia. All rights reserved.