HP CM3530 Service Manual - Page 204
Scanning/image capture system system, Optical assembly, Automatic document feed system, Control panel - color laserjet scan
UPC - 884420196501
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Scanning/image capture system system Optical assembly The scanner is a carriage-type platen scanner which includes the frame, glass, LED optics, and a scanner controller board (SCB) attached to the bottom of the assembly. The scanner has a sensor to detect legal-sized media and a switch to indicate when the ADF is opened. The ADF and control-panel assembly are attached to the scanner assembly. If the scanner fails, it can be replaced as a whole unit. The scanner replacement part does not include the ADF, SCB, or controlpanel assembly. The HP Color LaserJet CM3530 contains an interconnect board (ICB) which has an NVRAM component that is used to store critical engines values and formatter data. This NVRAM allows for simpler save/ restore process. When a formatter or DC controller is replaced, the critical engine values are copied from NVRAM on the ICB to the new component. Automatic document feed system If the ADF fails, it can be replaced as a whole-unit replacement part. Control panel The control panel is a USB connected device with its own diagnostic capabilities. Calibration of the control-panel touch screen does not require a special boot-key sequence. See . The control panel also includes a hardware integration pocket where third-party USB solutions, such as card readers, can be installed. Sensors in the ADF The ADF contains the following sensors: ● ADF-cover sensor. Detects whether the ADF cover is open or closed. ● Top-of-page sensor. Detects the top of the page before sending a page through the ADF and the end of the page after feeding/scanning is complete. ● Paper-present sensor. Detects whether a document is present in the ADF. If paper is present in the ADF when copies are made, the product scans the document using the ADF. If no paper is present when copies are made, the product scans the document using the scanner glass. 174 Chapter 5 Theory of operation ENWW