Gestetner B147 Service Manual page 22

6.9.5 PAPER HEIGHT DETECTION - TRAYS 1 & 2 ..............................6-70
6.9.6 PAPER END DETECTION - TRAYS 1 & 2 ....................................6-70
6.9.7 REGISTRATION.............................................................................6-71
6.9.8 PAPER FEED LINE SPEED...........................................................6-72
6.9.9 GRIP ROLLER RELEASE MECHANISM .......................................6-73
6.10 DUPLEX UNIT.......................................................................................6-74
6.10.1 OVERVIEW ..................................................................................6-74
6.10.2 DUPLEX OPERATION .................................................................6-75
Up to A4/LT (81/2" x 11") LEF ............................................................6-75
Larger than A4/LT (81/2" x 11") LEF...................................................6-75
6.10.3 DUPLEX INVERTER UNIT...........................................................6-76
6.10.4 FEED TO EXTERNAL EXIT TRAY (NON-DUPLEX MODE) ........6-77
6.10.5 FEED TO DUPLEX FEED UNIT ...................................................6-78
6.10.6 FEED TO TWO-TRAY FINISHER AND BOOKLET FINISHER ....6-79
With Optional One-Tray Paper Feed Unit ...........................................6-79
With Optional LCT or Two-Tray Paper Feed Unit ...............................6-79
6.10.7 DUPLEX FEED UNIT ...................................................................6-80
Drive ...................................................................................................6-80
Feed-in and feed-out...........................................................................6-80
6.11 IMAGE TRANSFER AND PAPER SEPARATION .................................6-81
6.11.1 OVERVIEW ..................................................................................6-81
6.11.2 TRANSFER BELT DRIVE ............................................................6-82
Drive Motor .........................................................................................6-82
Rotation Encoder ................................................................................6-83
6.11.3 TRANSFER CURRENT................................................................6-84
6.11.4 TRANSFER BELT CLEANING .....................................................6-85
6.11.5 TRANSFER BELT CONTACT ......................................................6-86
Mechanism .........................................................................................6-86
Transfer Belt Sensor ...........................................................................6-87
Copier ACS.........................................................................................6-87
Printer ACS.........................................................................................6-88
6.12 FUSING .................................................................................................6-89
6.12.1 OVERVIEW ..................................................................................6-89
6.12.2 FUSING UNIT DRIVE...................................................................6-90
Belt and Rollers ..................................................................................6-90
Fusing Clutch......................................................................................6-90
6.12.3 FUSING TEMPERATURE CONTROL..........................................6-91
Fusing Temperatures..........................................................................6-91
Temperature Corrections ....................................................................6-92
Overheat Protection ............................................................................6-92
6.12.4 OIL SUPPLY AND CLEANING .....................................................6-93
Oil Supply Pad and Roller...................................................................6-93
Oil Supply Mechanism ........................................................................6-94
6.12.5 WASTE OIL ..................................................................................6-95
Bottle Set Sensor ................................................................................6-95
Waste Oil Sensor ................................................................................6-96
6.12.6 NEW FUSING OIL SUPPLY UNIT DETECTION ..........................6-96
6.12.7 ENERGY SAVER MODES ...........................................................6-97
Overview.............................................................................................6-97
B147/B149/B190 x SM