Sharp TQ-GX30E Service Manual page 22

GX30
4) Rewriting a MOT file
Click the "Start Loading Flash" button to start rewriting.
1. "Press Power Button" appears.
<When using a cable for upgrading>
Hold down the Power key.
<When using the Communication Box>
Turn on handsets from No.10 down to No.1 (turn on only the handsets you are using).
2. "Keep Pressing Power Button" appears.
<When using a cable for upgrading>
Hold down the Power key until the "Keep Pressing Power Button" disappears.
<When using the Communication Box>
Leave the handsets turned on.
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