Sharp TQ-GX30E Service Manual page 43

4.8. Performance check and adjustment
With this function, SPST checks the performance of the handset and makes adjustments.
<Operation>
1) Set the COM port on the SPST initial screen and click "Performance check and adjustment". The following dialog box appears while processing.
2) When completed, the following is displayed. Click "Back to main menu" to exit.
The functions of each button are described below.
4.8.1 Main back light check
The main display back light turns on and the message appears on the PC.
Check the back light and press "OK".
• If a failure occurs, see "10. Back Light does not turn on." in [3] Troubleshooting.
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