Nokia RM-272 Service Manual

Also see for 3500 classic RM-272: Service manual

Contents

Nokia RM-272 Service Manual Manual pdf 92 page image

Energy 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 8 Calibration value limitsParameter Min. Max.ADC Offset -20 20ADC Gain 12000 14000BSI Gain 1100 1300VBAT Offset 2400 2650VBAT Gain 19000 23000VCHAR Gain N/A N/AIBAT (ICal) 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.RM-272; RM-273BB Troubleshooting and Manual Tuning GuidePage 3 –48 COMPANY CONFIDENTIAL Issue 1Copyright © 2007 Nokia. All rights reserved.