Chapter 77-19setting range: -100 (lighter) to +100 (darker)COPIER> ADJUST> V-CONT> DE-OFST)(adjusting VDC for copier)COPIER> ADJUST> V-CONT> DE-OFS-P)(adjusting VDC for printer)Enter the value indicated on the service label if you have initialized the RAM on the DC control PCB.7.7.3 Detecting the Toner Level and Controlling Toner Supply0009-4120The following shows the components associated with the toner supply control system:F-7-24[1] Toner bottle[2] Hopper assembly[3] Toner stirring plate[4] Toner feedscrew[5] Toner feed pipe[6] Developing assemblyM9: Hopper stirring motorM10: Toner supply motorTS1: Toner level sensorTS2: Inside hopper toner level sensorDC-CON: DC controller (components used to detect level of remaining toner)Toner Supply SequenceThe toner inside the developing assembly is monitored by the developing assembly toner sensor (TS1); when the toner inside the developing assemblyfalls below a specific level, the developing assembly toner level signal goes '0' so that the DC controller PCB recognizes it.If the DC controller PCB detects the developing assembly toner level signal for 0.3 sec or more, it generates the hopper motor drive signal so that thehopper assembly will start supplying toner.When the toner inside the developing assembly reaches a specific level and, as a result, the developing assembly toner level signal remains '1' for 0.7 secor more, the hopper supply motor stops.When the toner inside the hopper drops below a specific level, the hopper toner level detection signal goes '0'. If the signal remains '0' when the toner supplymotor has been turned on and off 20 times after the detection of the signal state by the DC controller, the machine issues a message of bottle exchange.Total rotating time reaches 60 seconds after the toner sensor in the developing assembly senses no toner, the machine issues a method of exchanging bottlesand stops the ongoing printing operation.When the toner bottle is replaced, the hopper supply motor and the stirring motor are turned on, and the developing assembly inside toner level detectionsignal goes '1', the machine resets the message of bottle exchange and resumes printing.F-7-25M10M9DC-CONJ103BHOP_TONER_SENSOR[2]J103ADEV_TONER_SENSOR[4]HOP_BOTTLE_ON[3]HOP_BOTTLE_ON[1]TS2[1][2][3][4][6]TS1Toner supply sequence startToner supplyHopper supply motor(M10)Developing assemblytoner sensor (TS1)Hopper toner sensor(TS2)Supply SupplyIf 120 sec or more,'020-0000' is indicatedtotal activation (ON) time of hopperstirring motor reaching 60 sec, message ofmethod of exchanging bottles -> print suspension.1 cycle (5 sec max.)toner supply motor driven for 20 cycles,message of exchanging bottles.
