Read Panasonic KX-MB1900RUB / KX-MB1900RUW Service Manual online
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KX-MB1900RUB/KX-MB1900RUW
6.4.
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.
A/D Converter.
When an original document is inserted and the start button pressed, pin A3 of IC300 goes to a low level and the transistor Q518
turns on.
This applies voltage to the CIS. The CIS is driven by each of the CCDSH, CCDCLK signals output from IC300, 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 IC503) and converted into 16-bit data by the A/D converter inside
IC503. Then this signal undergoes digital processing in order to obtain a high-quality image.
turns on.
This applies voltage to the CIS. The CIS is driven by each of the CCDSH, CCDCLK signals output from IC300, 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 IC503) and converted into 16-bit data by the A/D converter inside
IC503. Then this signal undergoes digital processing in order to obtain a high-quality image.
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