Denso BHT-604Q User Manual page 109

[5] LCD and indicator LED tests
Use the following procedure to perform an LCD and indicator LED test.
1.
Select "5: LCD" at the TEST menu and then press the ENT key.
The TEST BEEPER screen displays as shown on the right.
The indicator LED is OFF at this time.
Press the C key to return to the TEST menu.
2.
Press the ENT key.
The entire screen turns black and the indicator LED illuminates in green.
Press the BS key to return to the previous screen.
Press the C key to return to the TEST menu.
3.
Press the ENT key.
The entire screen turns gray.
Press the BS key to return to the previous screen.
Press the C key to return to the TEST menu.
2D Code Handy Terminal
97