Ricoh G133 Service Manual page 22

6.7.1 IMAGE TRANSFER.........................................................................6-40
Overview.............................................................................................6-40
ITB (Image Transfer Belt) Drive ..........................................................6-40
ITB Current .........................................................................................6-42
Transfer belt cleaning .........................................................................6-43
ITB (Image Transfer Belt) Contact ......................................................6-44
Transfer Belt Sensor ...........................................................................6-45
6.7.2 PAPER TRANSFER AND SEPARATION .......................................6-46
Overview.............................................................................................6-46
PTR (Paper Transfer Roller) Drive......................................................6-46
PTR (Paper Transfer Roller) Contact and Separation.........................6-47
6.8 PAPER FEED...........................................................................................6-49
6.8.1 OVERVIEW .....................................................................................6-49
6.8.2 DRIVE - TRAY 1, TRAY 2, AND BY-PASS TRAY ..........................6-50
Tray 1 and Tray 2 ...............................................................................6-50
By-pass Tray.......................................................................................6-50
6.8.3 PAPER PICK-UP.............................................................................6-51
6.8.4 PAPER LIFT - TRAYS 1 AND 2......................................................6-52
6.8.5 PAPER SIZE DETECTION - TRAYS 1 & 2 ....................................6-52
6.8.6 PAPER HEIGHT DETECTION - TRAYS 1 & 2 ...............................6-54
6.8.7 PAPER END DETECTION - TRAYS 1 & 2.....................................6-55
6.8.8 REGISTRATION..............................................................................6-55
6.8.9 PAPER FEED LINE SPEED............................................................6-56
6.8.10 TRAY LOCK MECHANISM........................................................6-56
Tray Lock at the Front.........................................................................6-56
Tray Lock at the Rear .........................................................................6-57
6.8.11 PAPER DUST COLLECTION ....................................................6-58
6.8.12 BY-PASS PAPER SEPARATION ..............................................6-58
6.8.13 BY-PASS PAPER SIZE DETECTION........................................6-59
6.9 FUSING ....................................................................................................6-60
6.9.1 OVERVIEW .....................................................................................6-60
6.9.2 FUSING UNIT DRIVE......................................................................6-61
Belt and Rollers ..................................................................................6-61
Lubricant Mechanism..........................................................................6-61
6.9.3 IH (INDUCTION HEATING) SYSTEM .............................................6-62
Basic IH System .................................................................................6-62
Paper Size Correction.........................................................................6-62
6.9.4 PRESSURE RELEASE MECHANISM ............................................6-63
6.9.5 FUSING TEMPERATURE CONTROL ............................................6-64
Components .......................................................................................6-64
Fusing Temperatures..........................................................................6-65
Overheat Protection ............................................................................6-70
6.9.6 CPM DOWN SYSTEM ....................................................................6-71
CPM Down Control .............................................................................6-71
6.9.7 ENERGY SAVER MODES ..............................................................6-71
Level 1 Energy Saver Mode................................................................6-71
G133 x SM