HP CM6030 Service Manual - Page 254
Product boards, Scanner system block diagram,
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Product boards The scanner includes two major parts: structure and scanner. The scanner includes the copy-processor board (CPB), scanner-control board (SCB), and PCI-e cable, which are embedded in the structure and scanner bodies. The scanner controls the ADF. Figure 5-50 Scanner Scanner system block diagram The scanner has its own power supply, which can accept the universal ac input range provided by the product power supply. The print engine controls the scanner power supply via a PSON signal. However, the PSON signal does not control the STBY_3.3 V power source from the print engine. STBY_3.3 V provides power for certain sensors during sleep mode. The scanner system has three cooling fans. The control-panel fan and scanner cooling fan are connected to the scanner power supply directly. The lamp fan is connected to the SCB and controlled by the SCB firmware. All three fans have a fan-lock detection mechanism. The lamp fan only operates during ADF scanning, while the other two fans operate when the scanner is on. The light source system 208 Chapter 5 Theory of operation ENWW
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