Gestetner B130 Service Manual page 19

6.16.3 TONER SUPPLY ...........................................................................6-39
Toner-Bottle Models............................................................................6-39
Toner Hopper Magazine (B045 ONLY)...............................................6-40
6.16.4 TONER DENSITY CONTROL .......................................................6-41
Overview.............................................................................................6-41
Reference Voltage ..............................................................................6-41
Toner Density Sensor Initial Setting....................................................6-41
Toner Concentration Measurement ....................................................6-42
Vsp/Vsg Detection ..............................................................................6-42
Calculation of Vref...............................................................................6-42
Toner Supply Determination ...............................................................6-42
Toner Clutch ON Time ........................................................................6-42
6.16.5 TONER SUPPLY IF SENSOR READING IS ABNORMAL ............6-43
ID Sensor............................................................................................6-43
TD Sensor...........................................................................................6-43
6.16.6 DETECTION OF TONER NEAR END AND TONER END ............6-43
Toner Near End detected when either of the following occurs............6-43
Toner End detected when any of the following occurs........................6-43
6.17 DRUM CLEANING AND TONER RECYCLING......................................6-44
6.18 PAPER FEED.........................................................................................6-45
6.18.1 OVERVIEW ...................................................................................6-45
6.18.2 PAPER FEED DRIVE MECHANISM .............................................6-46
From Paper Tray.................................................................................6-46
From 100-Sheet Bypass Tray .............................................................6-46
From 1-Sheet Bypass Tray (B045 ONLY)...........................................6-46
6.18.3 PAPER FEED AND SEPARATION ...............................................6-47
6.18.4 PAPER LIFT MECHANISM ...........................................................6-47
PAPER END DETECTION .................................................................6-48
Main Tray............................................................................................6-48
100-Sheet Bypass Tray ......................................................................6-48
6.18.5 PAPER REGISTRATION...............................................................6-48
6.19 DUPLEX UNIT........................................................................................6-49
6.19.1 IMPORTANT COMPONENTS .......................................................6-49
6.19.2 DUPLEX PRINTING PROCESS....................................................6-49
6.20 IMAGE TRANSFER AND PAPER SEPARATION ..................................6-52
6.20.1 OVERVIEW ...................................................................................6-52
6.20.2 IMAGE TRANSFER CURRENT TIMING (B044/B045/B046) ........6-53
6.21 IMAGE TRANSFER CURRENT (B129/B130/B168/B169) .....................6-54
6.21.1 TRANSFER ROLLER CLEANING.................................................6-55
6.22 IMAGE FUSING AND PAPER EXIT.......................................................6-56
6.22.1 OVERVIEW (B044/B045/B046) .....................................................6-56
6.22.2 OVERVIEW (B129/B130/B168/B169)............................................6-56
6.22.3 FUSING DRIVE AND RELEASE MECHANISM ............................6-57
6.22.4 HOT ROLLER DRIVE....................................................................6-58
Mechanism .........................................................................................6-58
Contact/Release Control.....................................................................6-58
6.22.5 PRESSURE ROLLER (B044/B045/B046) .....................................6-59
6.22.6 PRESSURE ROLLER (B129/B130/B168/B169) ............................6-59
6.22.7 PRESSURE RELEASE (B044/B045/B046) ...................................6-60
SM
CÓPIA NÃO CONTROLADA
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CÓPIA NÃO CONTROLADA
B129 Series/B044 Series