Chapter 22-5F-2-51. The colored area indicates the area where an image can be scanned by the laser beam.2. The times T1, T2, T3, T4 and T5 depend on the paper size.3. If the video controller does not specify the paper size with a paper size command at pickup operation from the multi-purpose tray (MPT), the printer cannot detectthe paper width. In such a case, the T1 and T3 are automatically set for letter size but T5 is set according to the paper length detected by the top of page sensor.2.3.2.3 Failure detection 0013-7368/ i-SENSYS LBP5360 / i-SENSYS LBP5300This control is to detect the failure in the laser diode.The laser driver IC converts the laser current of the laser diodes into voltage value during the initial APC period and sends it to the DC controller in form of theLASER CURRENT OUTPUT signal.If the voltage value equivalent to the LASER CURRENT OUTPUT signal is below its specified value, the DC controller presumes the laser unit failure, stops theprinter engine, and notifies the video controller of "E100 (optical unit failure)".2.3.3 Laser Scanner Motor Control2.3.3.1 Outline 0013-7370/ i-SENSYS LBP5360 / i-SENSYS LBP5300The scanner motor control is to rotate the scanner motor at its specified speed.There are two PCBs: one is for M/C and the other is for Y/Bk. The PCB for M/C is described here, as both are identical.The circuit diagram of the scanner motor is illustrated below.2mm 2mm2mm2mm/BDT3T22mm2mm2mm 2mmT2/BDT1T4 /TOPT5Right/Left marginmaskingC/Bk Image masking Y/M Image maskingTop/Bottommargin maskingRight/Left marginmaskingScanning directionScanning direction
