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3. To enter the interface of button diagnosis, select 3. Keypress Diag by pressing
/ , and press .
4. To check the button, press :
If the button is damaged, nothing or a wrong button name shows in the display.
8.3 Check Input Ports
This operation is used to check the polarity of input ports.
To check input ports, do the following:
1. To enter the menu interface, press .
2. To enter the diagnosis interface, select 8. Diagnosis by pressing /
, and press .