Ricoh G108 Service Manual page 20

6.7.5 OHP SENSOR................................................................................6-35
Reflective Photosensor .......................................................................6-35
Configuration Page and Utilities..........................................................6-35
OHP Sensor, User Setting, and Printer Driver ....................................6-36
6.7.6 PAPER END SENSOR...................................................................6-37
6.8 PAPER REGISTRATION AND PAPER TRANSFER...............................6-38
6.8.1 PAPER REGISTRATION................................................................6-38
Registration Roller ..............................................................................6-38
Drive ...................................................................................................6-38
Registration Sensor ............................................................................6-38
6.8.2 PAPER TRANSFER .......................................................................6-39
Transfer Roller ....................................................................................6-39
Paper Transfer Bias ............................................................................6-39
Discharge Plate ..................................................................................6-39
Contact Release Mechanism ..............................................................6-39
6.9 FUSING UNIT..........................................................................................6-40
6.9.1 OVERVIEW ....................................................................................6-40
6.9.2 DRIVE.............................................................................................6-41
6.9.3 PRESSURE UNIT...........................................................................6-41
6.9.4 FUSING PROCESS........................................................................6-41
6.9.5 TEMPERATURE CONTROL ..........................................................6-42
Main Components...............................................................................6-42
Temperature .......................................................................................6-43
Energy Saver Mode ............................................................................6-43
6.10 PAPER EXIT UNIT ................................................................................6-44
Drive ...................................................................................................6-44
Paper Exit Sensor ...............................................................................6-44
Paper Exit Overflow Sensor................................................................6-44
6.11 CONTROLLER ......................................................................................6-45
6.11.1 OVERVIEW ..................................................................................6-45
6.11.2 BOARD LAYOUT..........................................................................6-46
6.11.3 CONTROLLER FUNCTIONS .......................................................6-47
Tray Priority ........................................................................................6-47
Tray Locking .......................................................................................6-47
Manual Tray Select .............................................................................6-47
Auto Continue .....................................................................................6-47
6.11.4 BLACK OVER PRINT ...................................................................6-48
Black Over Print Disabled ...................................................................6-48
Black Over Print Enabled....................................................................6-48
6.11.5 NETWORK DATA PROTECTION UNIT .......................................6-49
NDPU and DES ..................................................................................6-49
Supported Network Interface ..............................................................6-49
6.12 ETHERNET BOARD .............................................................................6-50
6.12.1 ETHERNET BOARD LAYOUT .....................................................6-50
6.12.2 ETHERNET ..................................................................................6-51
6.13 USB 2.0 .................................................................................................6-52
6.13.1 GENERAL FEATURES ................................................................6-52
Overview.............................................................................................6-52
Plug and Play......................................................................................6-52
G108 viii SM