Denso BHT-500B User Manual page 115

BHT-500B
[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 on the right displays.
The indicator LED is OFF at this time.
Press and hold the BS/C key to return to the TEST menu.
2.
Press the ENT key.
The entire screen turns black.
Press the BS/C key to return to the previous screen.
Press and hold the BS/C key to return to the TEST menu.
3.
Press the ENT key.
The entire screen turns gray.
Press the BS/C key to return to the previous screen.
Press and hold the BS/C key to return to the TEST menu.
98