COPYRIGHT © 2000 CANON INC. 2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 2000CHAPTER 2 ORIGINAL EXPOSURE SYSTEM2-9 RInverter PCBXenon lamp ActivationcontrolcircuitJ5101 J5007 +24VReader controllerPCB13425324LAMP_ONINV_ERRLA2CPUFluorescentmaterialElectrodeOpeningElectrodeElectrodeElectrodeGlass tube3. Controlling the Scanning Lamp (LA2)3.1 OutlineThe system used to control the scanning lamp is constructed as follows and the items ofcontrol include the following:[1] Turning on and off the scanning lamp.[2] Monitoring the scanning lamp for errors.F02-301-013.2 Scanning LampThe machine’s scanning lamp is a xenon lamp of a non-electrode discharge type, in whichxenon gas is sealed in a tube.On the outside of the glass tube, two electrodes are arranged parallel to the tube axis, andthe inner side of the glass tube is coated with fluorescent material.The internal gas discharges and, as a result, the fluorescent material glows when a high-frequency voltage is applied across the electrodes.F02-302-013.3 Turning On/Off the LampThe scanning lamp is turned on/off in response to the drive signal (LAMP_ON) from theCPU on the reader controller PCB. When the signal is generated, the inverter generates ahigh-frequency voltage using the drive voltage (+24 V) supplied by the reader controllerPCB to turn on the xenon tube.Download Free Service Manual at http://printer1.blogspot.com
