JRC JMA-5206 Instruction Manual page 309

[III] Operation Panel Test
Checks for the controls and switches of the operation panel.
Key Test
Buzzer Test
Light
Procedures 1 Press [3] key while the Test Menu is
open.
The Keyboard Test Menu will appear.
2 Select the item number you want to
check, pressing numeric keys [1] to [3]
of the item.
The check contents will be displayed.
Exit 1 Press [RADAR MENU] key.
The menu will be closed.
1) Key check
2) Buzzer check
3) Keyboard light check
8─8
8.1 Performance Check
Keyboard Test
1. Key Test
2. Buzzer Test
3. Light
0. EXIT
8