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In case that the signal shown in figure 3-2 is not measurable, check voltages at reference oscillator G502 Check VCC 2.6 VDC at G502 pin 2, also check control voltage (AFC) at pin 1 which normally is 1.2 VDC. Note that control voltage may vary between 0.1 VDC and 2.3 VDC. Even without control voltage the oscillator must be able to work on a frequency around 26 MHz as shown in the Figure 3-3. If this is not the case you have to change G502. 26 MHz reference clock at the output of G502 Amplitude...

Display message Not Charging

If this message appears on the display after connecting charger to the phone, first you should run the energy management calibration to get more information about the fault. If calibration is possible without failure message, check if charging works now. If calibration does not work, following failure messages are possible Check voltage at C235, normally 0.5 VDC in service-jig. If voltage is not ok, check R220 222 for defect or broken solderings, also check that C235 236 have no shorts to...