Gestetner B147 Service Manual page 16

3.9 PAPER FEED..........................................................................................3-42
3.9.1 PICK-UP, FEED, AND SEPARATION ROLLERS ..........................3-42
Tray 1 and Tray 2 ...............................................................................3-42
By-pass Tray.......................................................................................3-42
3.9.2 PAPER WIDTH DETECTION BOARD ...........................................3-43
3.9.3 VERTICAL TRANSPORT SENSOR ...............................................3-44
3.9.4 RIGHT DOOR UNIT .......................................................................3-44
3.9.5 REGISTRATION SENSOR AND RELAY SENSORS .....................3-45
3.9.6 PAPER FEED CLUTCHES.............................................................3-45
3.9.7 BY-PASS FEED CLUTCH ..............................................................3-46
3.9.8 TRAY LIFT MOTOR .......................................................................3-46
3.9.9 PAPER FEED MOTOR...................................................................3-47
3.10 TRANSFER AND PAPER TRANSPORT UNIT .....................................3-48
3.10.1 TRANSFER UNIT .........................................................................3-48
3.10.2 TRANSFER BELT CLEANING UNIT............................................3-49
3.10.3 CLEANING BLADE AND CLEANING ROLLER ...........................3-50
3.10.4 TRANSFER BELT ........................................................................3-52
3.10.5 TRANSFER UNIT DRIVE MOTOR...............................................3-54
3.11 ID SENSORS ........................................................................................3-55
3.12 FUSING .................................................................................................3-56
3.12.1 FUSING UNIT...............................................................................3-56
3.12.2 OIL SUPPLY UNIT AND UPPER COVER....................................3-57
3.12.3 CLEANING UNIT ..........................................................................3-58
3.12.4 HEATING ROLLER LAMP............................................................3-59
3.12.5 FUSING BELT UNIT.....................................................................3-60
3.12.6 HOT ROLLER...............................................................................3-61
3.12.7 HEATING ROLLER ......................................................................3-61
3.12.8 PAPER GUIDE PLATES AND STRIPPER PAWLS......................3-62
3.12.9 THERMISTOR AND FUSE...........................................................3-63
3.12.10 PRESSURE ROLLER FUSING LAMP .......................................3-64
3.12.11 PRESSURE ROLLER.................................................................3-65
3.12.12 FUSING UNIT FAN.....................................................................3-67
3.12.13 WASTE OIL BOTTLE .................................................................3-68
3.12.14 PAPER EXIT ..............................................................................3-68
3.13 ELECTRICAL COMPONENTS..............................................................3-69
3.13.1 MOVING THE CONTROLLER BOX OUT OF THE WAY .............3-69
3.13.2 MOVING THE HIGH VOLTAGE SUPPLY UNIT - C,
B OUT OF THE WAY ...................................................................3-70
3.13.3 CONTROLLER, IPU, AND BCU ...................................................3-70
3.13.4 HDD..............................................................................................3-72
3.13.5 NVRAM REPLACEMENT PROCEDURE .....................................3-72
NVRAM on BCU .................................................................................3-72
NVRAM on Controller .........................................................................3-73
3.13.6 REMOVING THE HIGH VOLTAGE SUPPLY BOARD - C, B .......3-74
3.13.7 SUB POWER SUPPLY UNIT .......................................................3-74
3.13.8 PSU ..............................................................................................3-75
3.13.9 DRIVER BOARD ..........................................................................3-75
B147/B149/B190 iv SM