BL-C140CE, BL-C140E, BL-C160CE, BL-C160E - Panasonic Video Monitoring Service Manual (repair manual). Page 12

12

Operating Power Supply: +3.3V (+A3.3VS)
Package: 3 pin Board Insertion Type
Changes temperature variation into analogue signal which it emits, when a heat source, such as a person, comes into detection
area.
The analogue signal is amplified by Operational Amplifier (IC303).

Operating Power Supply: +3.3V (+A3.3VS)
Amplifies analogue signal from Pyroelectric Infrared Sensor (IC301).
The amplified analog signal is input to the AD input terminal of the CPU (IC101).

Operating Power Supply: +3.3V (+A3.3VS)
Package: 5 pin SOP
Switch gain setting of the operational amplifier (IC303). The gain setting is as follows with a 4-pin terminal. 

1. Pyroelectric Infrared Sensor (IC301) emits analogue signal, when a heat source, such as a person, moves into the detection

area.

2. Above signal is amplified by Operation Amplifier (IC303) which emits analogue signal.
3. Above signal is input to the AD converter of the CPU (IC101), and if the signal amplitude exceeds the stipulated voltage

range, the human detection sensor is determined to have reacted. 

*The human detection sensor operates at nighttime only. Whether it is day or night is determined automatically from the image
picked up by the sensor camera. 

Power LED control circuit
The power LED is controlled by the CPU (IC101) and is input to the LED control circuit. 
(3-color LEDs are used.)

GAIN2 (IC305-4pin)

GAIN1 (IC304-4pin)

GAIN [dB]

0

0

73.0

0

1

65.1

1

0

61.9

1

1

58.9

LED_R

LED_G

Color of Power LED

L

L

OFF

L

H

Green

H

L

Red

H

H

Orange