Acer S2W 3300U Service Manual - Page 23

transferred via SCSI bus, Printer port and USB cable to host computer. To get the whole image data, the line motor steps forward to next scan-line, and the same procedures are conducted for this scan-line. A home sensor on the CCD board is used for the home positioning of the line-motor. If a color image is requested, the color CCD is co-operated with every scan-line. The switching regulator board (please refer to figure 5-4) transforms the adapter DC voltage into the required power sources. It has multiple DC outputs: +5V, +15V, and +12V. An inverter board converts DC 12V to high-frequency (~30K) AC voltage (~400 V) by a DC/AC inverter for the Cold Cathode Fluorescent Lamp. Scanner 3300U Regulator board. Block AC 110 Adapter +15V DC Voltage Regulator Converter Board Main Board Figure 5-4 3300U Scanner Main Board. Block