Cis Control Section - Panasonic KX-MB2230JT Service Manual

6.6.

CIS Control Section

The scanning block of this device consists of a control circuit and a CIS (contact image sensor), and AFE (Analog Front End)
include A/D Converter.
When start the scanning, pin A3 of IC300 will be low level and the transistor Q518 turns on, 3.3V is supplied to the CIS.
The CIS is driven by each of the signals (CCDSH, CCDCLK, RESOLUTION) which are output from IC300.
The analog image signal is input to the AFE (20pin of IC503), and converted into 16-bit data by the A/D converter inside.
Then this signal undergoes digital processing in order to obtain a high-quality image in IC300.
Resolution
The CIS can change the resolution, 300dpi mode or 600dpi mode. If RESOLUTION signal is High level, CIS operates 600dpi mode.
The other case is 300dpi mode.
Operation
300dpi
COPY -
PC SCAN ~300 X 300
FAX -
37
KX-MB2230JT/ KX-MB2270JT/ KX-MB2515JT/ KX-MB2545JT/ KX-MB2575JT/ DP-MB310JT
CIS Resolution
600dpi
ALL
400 X 400~
ALL