Canon ImageRunner 600 Service Manual

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Canon ImageRunner 600 Service Manual Manual pdf 85 page image

CHAPTER 3 ORIGINAL EXPOSURE SYSTEM3-12 COPYRIGHT © 1999 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.E. Detecting an ErrorAs part of controlling the fluorescent lamp, checks are made of the following:[1] Remaining life of the fluorescent lamp (See Figure 3-305.)[2] Activation error[3] Thermistor errorFigure 3-305 Checking the Remaining Life of the Fluorescent LampMain powerswitch ONControl panelpower switch ONCopy Startkey ONDetectionINTR LSTRSTBY STBYControlled to 70˚C Controlled to 70˚CSLEEP SCFW SCRVE225E219E225E219An error is indicated if the optimumlight intensity is not attained in 5sec after activation.The fluorescent lamp is assumed tohave reached the end of its life upondetection of 170˚C or higher duringactivation (requiring much power toattain an optimum level of intensity).The fluorescent lamp is assumed to have reachedthe end of its life upon detection of 170˚C or higherduring activation (requiring much power to attainan optimum level of intensity).If an optimum light intensitycannot be attained within 5sec after activation.Intensity sensoroutput (FLDTCT)Scanning lamp(FL1)Temperature sensoroutput (FL-TH)