41956001TH Rev.1 19 /Oki Data CONFIDENTIALFigure 2.3The engine control block (PU) is controlled by the engine control board (K7N PWB) which consistsof a CPU (MSM66Q577), general LSI chip (DCON, MCON), flash ROM, EEPROM, SRAM,SDRAM and pulse motor drivers (see Figure 2.3).(1) CPUThis, a 16-bit CPU with an AD converter (OKI MSM66Q577), controls the entire system.(2) DCON LSIThis LSI (UPD65454GD-241-LML, UPD65946GD-137-LML), which is contained in theprinter engine control block, incorporates 16 megabits of video memory and has functionssuch as engine-controller interfacing, LED interfacing, video memory control, main scan colormisalignment correction and skew correction.2.2 Engine Control Board (K7N PWB)OPTION TRAYINT28MHzCPUMSM66Q577FLASHMCONLSISRAMEEPROMCONTROLPANELMOTORDRIVERPULSEMOTOR *9GEAREDMOTORCLUTCHLED HEAD (K)LED HEAD (Y)LED HEAD (M)LED HEAD (C)PU FANFUSER FANID, BELT,FUSERCHECKSCLOCKGENERATORDCONLSIMOTORDRIVERCLKRESETDUPLEXPAPER SIZESTACKER FULLCUSDRAMSDRAMPAPER THICKNESSSENSORCOROR REGISTRATIONSENSORCOVER OPEN(UPPER, STACKER, RIGHT SIDE)1ST TRAY SENSORS(PAPER END, PAPER NEAR END)PAPER FEED SYSTEM SENSORS(PAPER FEED, PAPERREGISTRATION, EJECT)MT SENSORS(STAGE POSITION, PAPER END)DISPOSAL TONER SENSORHEAT ROLLER TEMPOHPTEMPATUREHUMIDITYHEAD TEMPDENSITYANALOGSW32MHzHIGH VOLTAGE POWERSUPPLY SERIAL INTERFACE
