LG GR-409GTPA User Manual download pdf (Page 20)

(3)BUZZER

OPERATION

CHECK

-24-

DISPLAY

FUNCTION

BUTTON

RING

DOOR

OPEN

ALARM

(DING~

DONG~)

(SCREECHING)

OFF

IC1

(No.23

Pin)

ov

IC1

(No.22

Pin)

ov

MEASURING

POINT

CONDITIONS

0.05s

0.2s

0.1s 1s

0V

5V

0V

5V

0V

5V

0V

5V

0.5s 0.5s

2.66khz

(DING~)

2.232khz

(DONG~)

3.1khz

OFF

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