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KX-FLB758RU
7.4.
CIS CONTROL SECTION
The scanning block of this device consists of a control circuit and a contact image sensor made up of a celfoc lens array, an LED
array, and photoelectric conversion elements.
When an original document is inserted and the start button pressed, pin Y8 of IC604 goes to a high level and the transistor Q611
turns on.This applies voltage to the LED array to light it. The contact image sensor is driven by each of the FTG-F1 signals output
from IC604, and the original image illuminated by the LED array undergoes photoelectric conversion to output an analog image
signal (SIG). The analog image signal is input to the system ASIC on SCIN (pin w5 of IC604) and converted into 8-bit data by the
A/D converter inside IC604. Then this signal undergoes digital processing in order to obtain a high-quality image.
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Troubleshooting
