Sharp GX15 Service Manual page 29

4. Make sure the voltage is set properly and press "OK".
(Calibration starts.)
5. Click "OK".
6. The initial screen returns.
4.5.4 RF performance check
1. Apply 4 V using a stabilised power supply and turn on the handset (phone).
2. Start "RF calibration & check" on SPST and click "Check".
3. When initialisation is complete, the following message appears. Lower the stabilised power supply voltage to 3.7 V and click "OK".
4. Make sure the voltage is set properly and press "OK".
(RF performance check starts.)
5. The following dialogue box appears after the check. Increase the stabilised power supply voltage to 4.0 V and click "OK".
CONFIDENTIAL
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GX15