Chapter 55-19T-5-145.3.3.7 Outline0008-7405/ iR8070The system used to control the scanning lamp is constructed as follows and the items of control include the following:[1] Turning on and off the scanning lamp.[2] Monitoring the scanning lamp for errors.F-5-285.3.3.8 Scanning Lamp0008-7406/ iR8070The machine's scanning lamp is a xenon lamp of a non-electrode discharge type, in which xenon gas is sealed in a tube.On the outside of the glass tube, two electrodes are arranged parallel to the tube axis, and the 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.F-5-295.3.3.9 Turning On/Off the Lamp0008-7407/ iR8070The scanning lamp is turned on/off in response to the drive signal (LAMP_ON) from the CPU on the reader controller PCB. When the signal is generated,the inverter generates a high-frequency, and high-voltage using the drive voltage (+24 V) supplied by the reader controller PCB to turn on the xenon tube.5.3.3.10 Detecting an Error0008-7408/ iR8070The reader controller circuit generates the error signal (INV_ERR) in response to an errorRelated Error CodeE220(activation error)[1] While in standby, the scanning lamp turns on. (detected inreference to the voltage of FL-DTCT)[2] During scanning, the scanning lamp turns off. (detected inreference to the voltage of FL-DTCT)E222(fluorescent lamp heater error)[1] When the main power switch is turned on, the temperature doesnot reach 70 deg C or higher 5 min after the scanner heater hasturned on (HEAT-ON=1).[2] While power is supplied, the temperature does not reach 75 degC or more 3 min after the fluorescent lamp heater has turned on.E211(thermistor open circuit)[1] When the main power switch is turned on, the temperature doesnot reach 10 deg C or higher 2 min after the fluorescent heater hasturned on (HEAT-ON=1).[2] While power is supplied, a temperautre of 0 deg C or lower isdetected.E215(thermistor short circuit)While the scanning lamp is off, a temperature of 170 deg C or moreis detected.E219(scanning lamp end of life)While the scanning lamp is on, a temperature of 170 deg C or higheris detected by the thermistor.Inverter PCBXenon lamp ActivationcontrolcircuitJ5101 J5007 +24VReader controllerPCB13425324LAMP_ONINV_ERRLA101CPUFluorescentmaterialElectrodeOpeningElectrodeElectrodeElectrodeGlass tube
