Chapter 66-4F-6-4Related Service Mode:- COPIER > ADJUST > LASER > PVE-OFST (laser projection position adjustment)If you have replaced the DC controller PCB or initialized the RAM on the DC controller PCB, enter the adjustment value.Setting range: -300 to 300Note that the laser B move in sync with the laser A.The laser D move in sync with the laser C.6.3.2 Controlling the Intensity of Laser Light6.3.2.1 APC Control 0010-8029iR7105 / iR7095 / iR7086The machine uses APC control to make sure that the intensity of laser light remains at a specific level by controlling the output of the laser diode of the laser driver.For the control, the machine causes the Video controller to send the laser control signal (CTL0a, CTL1a, CTL2a, CTL0b, CTL1b, CTL2b) to the laser drive IC onthe laser driver PCB. As a result, the laser drive IC is set to APC mode, thus forcing the laser diode (LD) to emit light. While the control is under, way, the laserdriver IC uses the photo diode (PD) to monitor the laser diode (LD), adjusting the output of the laser diode until a specific level of intensity is reached.F-6-5SERVICE MODE:COPIER > FUNCTION > LASER > POWER-A, B, C, D (activation for laser power adjustment)Use this mode to turn on the laser when checking laser activation.BD PCBLaser driverPCB 2BDJ3701J1319 J1406J1317J1317J1312J1313J1302J1303 J1406GND5VVIDEOBD432136678Laser driverPCB 1Video signal PCBSyncsignalgenerationMemorycontrol36When laser lightis detected, '0'.Generates the printersync signal based onCLK-B.Executes read operation basedon this sync signal.FrontSetting decreased Setting increasedRearLaser A, CLaser driver PCB 15VLaser driver ICPDLDLaser driver PCB 2CNT1aCNT0aCNT0bCNT2aCNT2bCNT1bJ1311Video PCBCNT1aCNT0aCNT0bCNT2aCNT2bCNT1bJ1317J1406J1301
