Cis Control Section - Panasonic KX-FLB802CX Service Manual

KX-FLB802CX/KX-FLB812CX/KX-FLB802CXS/KX-FLB812CXS
6.7.

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 an original document is inserted and the start button pressed, pin U5 of IC600 goes to a low level and the transistor Q613
turns on. This applies voltage to the CIS. The CIS is driven by each of the SCSI, SCCLK signals output from IC600, and the original
image illuminated by the LED to output an analog image signal. The analog image signal is input to the AFE on VINP (20pin of
IC612) and converted into 16-bit data by the A/D converter inside IC612. Then this signal undergoes digital processing in order to
obtain a high-quality image.
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