Ricoh DD 4450 Service Manual page 7

4.5.5 SENSOR BOARD UNIT (SBU) ....................................................... 4-22
4.5.6 EXPOSURE LAMP STABILIZER .................................................... 4-22
4.5.7 SCANNER HP SENSOR ................................................................ 4-23
4.5.8 PLATEN COVER SENSOR ............................................................ 4-24
4.5.9 FRONT SCANNER WIRE ............................................................... 4-25
Reinstalling the Front Scanner Wire ................................................... 4-27
4.5.10 REAR SCANNER WIRE ............................................................. 4-29
Reinstalling the Rear Scanner Wire ................................................... 4-29
4.6 MASTER EJECT UNIT ............................................................................ 4-31
4.6.1 MASTER EJECT UNIT ................................................................... 4-31
Master Eject Safety Switch ................................................................. 4-32
Eject Box Set Switch .......................................................................... 4-33
4.7 MASTER FEED ....................................................................................... 4-37
4.7.1 MASTER MAKING UNIT ................................................................ 4-37
4.7.2 PLOTTER SAFETY SWITCH ......................................................... 4-37
4.7.3 THERMAL HEAD ............................................................................ 4-38
Installation .......................................................................................... 4-40
4.7.4 DUCT PLATE HP SENSOR, DUCT PLATE MOTOR ..................... 4-41
4.7.5 CUTTER UNIT ................................................................................ 4-43
4.7.6 THERMAL HEAD DRIVING UNIT................................................... 4-43
4.7.7 DUCT JAM SENSOR ADJUSTMENT............................................. 4-44
4.7.8 MASTER EDGE SENSOR ADJUSTMENT ..................................... 4-45
4.7.9 2ND DRUM MASTER SENSOR ADJUSTMENT ............................ 4-46
4.7.10 MASTER END SENSOR ADJUSTMENT ................................... 4-47
4.7.11 THERMAL HEAD VOLTAGE ADJUSTMENT ............................. 4-48
4.8 PAPER FEED .......................................................................................... 4-49
4.8.1 PICK-UP ROLLER, PAPER FEED ROLLER, FRICTION PAD ....... 4-49
4.8.2 PAPER FEED SAFETY COVER .................................................... 4-50
4.8.3 PAPER SEPARATION PRESSURE ADJUSTMENT ...................... 4-53
4.8.4 PAPER WIDTH DETECTION BOARD............................................ 4-54
4.9 PRINTING ................................................................................................ 4-55
4.9.1 PRESS ROLLER ............................................................................ 4-55
4.9.2 PRESS ROLLER RELEASE LEVER ADJUSTMENT ..................... 4-56
4.9.3 PRINTING PRESSURE ADJUSTMENT ......................................... 4-57
4.10 DRUM ................................................................................................ 4-58
4.10.1 PREPARATION .......................................................................... 4-58
4.10.2 CLOTH SCREEN ........................................................................ 4-58
Installation .......................................................................................... 4-59
SM iii C279