Energy Management Calibration - Nokia RM-237 Service Manual

RM-237
BB Troubleshooting and Manual Tuning Guide

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
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 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
ADC Gain
BSI Gain
VBAT Offset
VBAT Gain
VCHAR Gain
IBAT (ICal) Gain
9. Click Read, and confirm that the new calibration values are stored in the phone memory correctly. If the
values are not stored to the phone memory, click Write and/or repeat the procedure again.
10. To end the procedure, close the
Issue 1
Table 11 Calibration value limits
-20
12000
1100
2400
19000
N/A
7750
Energy Management Calibration window.
COMPANY CONFIDENTIAL
Copyright © 2007 Nokia. All rights reserved.
Calculated values column. If the new
Min.
20
14000
1300
2650
23000
N/A
12250
Nokia Customer Care
Max.
Page 6 –49