User Guide

CCS Technical Documentation 7 - Troubleshooting Instructions
RH-26
Issue 1 02/04 ©Nokia Corporation Page 45
Baseband calibration
All these calibrations should be performed by using the JBV-1 box, controlled by Phoenix
through FPS-8. Calibration is done in the LOCAL mode.
Manual calibration instructions:
1 Calibrate VBAT.
• Set VBATT line to 3.1V and 4.2V (+/-20 mV) -> read AD-converter values and
save them.
• VBAT calibration is made in order to get correct battery voltage.
2 Calibrate BSI.
• Set to BSI line 1% 75kohm resistor -> read AD-converter value and save it.
• BSI calibration is made in order to get correct battery size information.
3 Calibrate VCHARGE.
• Connect 8.4V (+/-20 mV) to charger line -> read AD-converter value and save it.
• VCHARGE calibration is made in order to get charger types and charger voltages
correct.
4 Calibrate charging current.
• Connect 500mA (+/-15 mA) to charger line -> read AD-converter value and save
it.
• Charging current calibration is made in order to get correct charge current.