Ricoh B132 Service Manual page 25

6.11.3 POTENTIAL CONTROL ...............................................................6-82
When is Potential Control Done? ........................................................6-82
What is Done During Potential Control? .............................................6-83
6.11.4 TONER SUPPLY CONTROL .......................................................6-87
Overview.............................................................................................6-87
Toner Supply Operation Flow .............................................................6-89
6.12 IMAGE TRANSFER AND PAPER TRANSFER.....................................6-90
6.12.1 OVERVIEW ..................................................................................6-90
6.12.2 ITB DRIVE ....................................................................................6-93
6.12.3 ITB LIFT........................................................................................6-94
6.12.4 TRANSFER POWER PACK .........................................................6-96
6.12.5 PAPER TRANSFER AND SEPARATION.....................................6-97
6.12.6 PTR CLEANING ...........................................................................6-98
6.12.7 ITB CLEANING.............................................................................6-99
6.12.8 ITB SPEED CONTROL ..............................................................6-100
6.12.9 ITB VENTILATION......................................................................6-101
6.13 PAPER FEED......................................................................................6-102
6.13.1 OVERVIEW ................................................................................6-102
6.13.2 DRIVE.........................................................................................6-104
6.13.3 TRAY AND PAPER LIFT MECHANISM - TRAY 2,3..................6-105
Bottom Plate Lift ...............................................................................6-105
Lift Sensor.........................................................................................6-106
6.13.4 PAPER FEED AND SEPARATION MECHANISM......................6-107
Feed and Separation at Standby: No Paper Present ........................6-107
Paper Feed and Separation..............................................................6-108
Separation Roller Release Mechanism.............................................6-109
6.13.5 PAPER NEAR-END AND PAPER END - TRAYS 2 AND 3 .......6-110
6.13.6 PAPER SIZE DETECTION.........................................................6-111
Tandem Tray (Tray 1) .......................................................................6-111
Universal Cassettes (Tray 2, 3) ........................................................6-111
6.13.7 PAPER TRAY HEATERS ...........................................................6-113
6.13.8 TANDEM TRAY - TRAY 1 .........................................................6-114
Overview...........................................................................................6-114
Connecting the Left and Right Sides of the Tray ..............................6-115
Paper Lift/Remaining Paper Detection..............................................6-116
Fence Drive ......................................................................................6-118
Rear Fence Drive..............................................................................6-119
Tray Side-to-side Positioning ............................................................6-120
6.13.9 TRAY POSITIONING MECHANISM - TRAYS 1 TO 3 ...............6-121
6.13.10 BY-PASS TRAY........................................................................6-122
By-pass Feed and Separation ..........................................................6-122
By-pass Tray Paper End Detection...................................................6-123
By-pass Paper Size Detection ..........................................................6-124
6.13.11 PAPER REGISTRATION..........................................................6-126
Overview...........................................................................................6-126
Paper Registration Drive...................................................................6-127
Jam Removal at Paper Registration .................................................6-128
6.13.12 PAPER TYPE AND DOUBLE-FEED DETECTION...................6-129
SM xiii B132/B200