Ricoh B286 Service Manual page 25

Pressure Roller Temperature Feedback ............................................ 6-76
Fusing Temperature Control: Inching ................................................. 6-79
Fusing Temperature Control: CPM Down .......................................... 6-79
6.9.6 HOT ROLLER CLEANING.............................................................. 6-80
6.9.7 FUSING UNIT DRIVE MECHANISM .............................................. 6-81
6.9.8 WRINKLE PREVENTION ............................................................... 6-82
Motor Speed Control .......................................................................... 6-82
Inching Control ................................................................................... 6-82
6.10 PAPER EXIT ...................................................................................... 6-83
6.10.1 OVERVIEW ............................................................................... 6-83
Upper Exit........................................................................................... 6-83
Rear Exit............................................................................................. 6-84
Jam Detection .................................................................................... 6-84
6.10.2 SWITCHING THE PAPER EXIT................................................ 6-84
Upper Exit........................................................................................... 6-84
Rear Exit............................................................................................. 6-85
6.10.3 PAPER EXIT DRIVE ................................................................. 6-86
6.11 ELECTRICAL COMPONENTS........................................................... 6-87
6.11.1 OVERVIEW ............................................................................... 6-87
Overall System ................................................................................... 6-87
IPU Board Details............................................................................... 6-89
6.11.2 DESCRIPTION OF ELECTRICAL COMPONENTS .................. 6-90
6.11.3 MCU, IPU ................................................................................ 6-100
MCU (Main Control Unit) .................................................................. 6-100
IPU (Image Processing Unit) ............................................................ 6-101
6.11.4 PSU ......................................................................................... 6-101
6.11.5 SMDB, VDB, SIB..................................................................... 6-102
SMDB (Scanner Motor Drive Board) ................................................ 6-102
VDB (Video Drive Board) ................................................................. 6-102
SIB (Scanner Interface Board) ......................................................... 6-102
CIS I/F (1 to 5).................................................................................. 6-102
6.11.6 RFDB, SFDB ........................................................................... 6-103
RFDB (Roll Feed Drive Board) ......................................................... 6-103
SFDB (Sheet Feed Drive Board) ...................................................... 6-103
6.11.7 GW CONTROLLER BOARD ................................................... 6-104
SM xiii B286/B289