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Sharp FACSIMILE XU-107 Service Manual
Also see for FO-165: Operation manualService manual
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Fig. 43-5. Documents requiring use of document carrier1) Documents smaller than B6 (128mm x 182mm).2) Documents thinner than the thickness of 0.06mm.3) Documents containing creases, folds, or curls, especially thosewhose surface is curled (maximum allowable curl is 5mm).4) Documents containing tears.5) Carbon-backed documents. (Insert a white sheet of paper be-tween the carbon back and the document carrier to avoid transferof carbon to the carrier.)6) Documents containing an easily separable writing material (e.g.,those written with a lead pencil).7) Transparent documents.8) Folded or glued documents.Document in document carrier should be inserted manually intothe feeder.4. Document release4-1. Cross section view(RIGHT SIDE)Fig. 54-2. GeneralWhen the release lever is pulled by hand in the direction of arrow A,the latch is released and the upper document guide moves on its axisin the direction of the arrow. The feed rollers, the separation rubberplate, and the pinch rollers become free to make it possible to removethe document.5. Optical system(1) General viewFig. 6(2) CompositionThe optical system is composed of the document feed mechanism,the lamp, the reflecting mirrors, the focusing lens, the CCD sensor,and the read process circuit.5-1. LED LampThe LED lamp is used to expose the document.5-2. LensThe lens is used to focus the light reflected from the document on theCCD elements.5-3. CCDThe CCD (charge coupled device) image sensor consists of a pho-todiode array which converts the intensity of light reflected from thedocument surface into series of analog voltages which are thenstored in an analog shift register. The series of analog voltages arethen converted into a digital equivalent by a black/white binary logiccircuit.(Example) Scan signal output waveformFig. 71) The minimum output from the CCD at the maximum scan width ofdocument (216mm) must be more than 40% of the peak value.2) The peak output must be about 200mV under room temperatureto avoid CCD saturation.Paper feed rollerBack of documentLast page of documentFirst page of documentSeparation rubber platePaper feedspringCCD CCD PWBDocumentLED LampGlassMirror 2RensMirror 1Mirror 3Peak40%minimumMaximum document width, 216mmScan linelength100%Document guide ass'yLower cabinetPaper coverUX-177H3 – 2 |
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