Oki MB280 Service Manual
Also see for MB280: User guideQuick start guide
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Contents
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PRINTER 3000 304 995 - 01iPRINTER MODEL-L1G191SERVICE MANUALTECHNICAL DOCUMENT6 September 2005 !1-5DetailedDescriptionsBlock DiagramThe Engine Board controls the laser diode power (APCSH) and transfers data forprinting to the laser diode (VIDEO). As an electrical safety feature, there is aninterlock switch on the Engine Board. This switch cuts +24 volts whenever the frontdoor is opened.Error ConditionsLaser ErrorThe machine detects laser synchronization signal pulses (PGSYCI) 70 millisecondsafter the (LDENA) signal is sent. It detects a laser error if the pulse count does notreach the specified number within 400 milliseconds.When this occurs, the machine warns the customer on the LCD panel (Error 56).Polygon Mirror Motor ErrorThe machine detects a polygon mirror motor error when the (PMLOK) signal doesnot go low within 3.5 seconds of the (PMENA) signal. When this occurs, themachine warns the customer on the LCD panel (Error 57).Laser Diode UnitLaser DiodeDriverLaser DiodeLaserSynchronizationDetectorPolygon MirrorMotor UnitPolygon MirrorMotor DriverRegulatorEngine BoardPowerSupplyUnit+5VVIDEOLDENAAPCSHPGSYCI+24VDPMENAPMCLKPMLOK+24VInterlock SwitchG182D012.WMF |
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