Panasonic KX-FM330GR Service Manual page 196

KX-FP320G / KX-FM330G
6.4.4. READ SECTION
1. Function
· A document is illuminated by the LED array, and the reflections pass through the reduction-projection lens and are imaged
on the CCD image sensor.
· The document image is photoelectrically transferred by the CCD image sensor, and an analog image signal corresponding
to one line of the document is output continuously.
· The analog image signal enters the image signal processing circuit in ASIC (IC501) and then is converted into digital data.
2. Circuit Operation
[Start]
When the START/COPY button is pressed, pin 21 of IC501 goes to a low level and Q507 is turned ON. This makes pin 22 of
IC501 a high level and the voltage applied to the LED array turns on the LED. F1, F2, FR and FTG signals are output to the
CCD board to drive the CCD image sensor. Therefore, when the LED is turned ON, the VIDEO (analog image signal) is output
from the CCD board to pin 7 of CN506.
154