Sharp TQ-GX30E Service Manual page 29

4.5.3 RF calibration
1. Apply 4 V using a stabilized power supply and turn on the handset.
2. Start "RF calibration & check" on SPST and click "Calibration".
3. When initialization is complete, click "OK".
4. Apply 4 V using a stabilized power supply and turn on the handset. After the handset enters Standby mode, lower the voltage to 3.7 V, click "OK".
5. Make sure the handset is on and click "OK".
(Adjustment starts.)
6. Click "OK".
7. The initial screen returns.
<Note>
The following appears when the handset software (mot) is outdated. Upgrade to a new version.
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