Oki OF5600 Service Manual
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Contents
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Page: 188Service Manual for OF5300/5600Chapter A Board Descriptions1. Block diagramThe circuit diagram consists of the following function:IC6 (A/D converter) and amplifier30 V/24 V conversion circuitConnector CN10 that provides an interface between M17 board and CIS (contact image sensor).Figure A3.2.5 shows the related signals and block diagram of CIS.2. FunctionOne-line picture data is read in the sequence from the scanning unit (CIS) as SIG signal (analog data) toA/D converter (analog/digital converter) of IC6 via amplifier. After conversion from analog data to 6-bitdigital signal (SDT2 - SDT7) under the control of IC6, the picture data is sent to EXSEED (scanningcontrol LSI) of IC20. Here, the picture data undergoes various kinds of picture processings.Sensor interface signal output from EXSEED.LEDON : LED on/off control signalPDCK : Scanning sensor drive clock (1.25MHz for ODA/833KHz for INT'L)MISP : Scanning synchronous signal (2.5 msec)ADCLK: Sampling clock for A/D converter (1.25MHz for ODA/833KHz for INT'L)Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA BusinessPartner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com) |
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