Energy Management Calibration - Nokia RM-627 Service Manual

Energy management calibration

Prerequisites
Energy Management (EM) calibration is performed to calibrate the setting (gain and offset) of AD converters
in 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.
Steps
1. Place the phone to the docking station adapter (CU-4 is connected to the adapter).
Phoenix service software.
2. Start
Choose File → Scan Product.
3.
Choose Tuning → Energy Management Calibration.
4.
5. To show the current values in the phone memory, click Read, and check that communication between
the 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 are
selected 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 the
calibration 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.
Parameter
ADC Offset
Page 3 – 66
Table 9 Calibration value limits
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Calculated values column. If the new
Min.
+40
RM-627
Max.
Issue 1