Ricoh G104 - Page 17

SM v G104/G160/G161
6.2 PROCESS CONTROL ..............................................................................6-8
6.2.1 OVERVIEW ......................................................................................6-8
6.2.2 POTENTIAL CONTROL ...................................................................6-9
Overview...............................................................................................6-9
Process Control Self-check...................................................................6-9
6.2.3 PROCESS CONTROL SELF-CHECK PROCEDURE ....................6-11
Step 1: VSG Adjustment .....................................................................6-11
Step 2: ID Sensor Solid Pattern Generation .......................................6-11
Step 3: Sensor Pattern Detection .......................................................6-11
Step 4: Toner Amount Calculation ......................................................6-11
Step 5: VD, VB, VL Selection and VREF Adjustment .........................6-12
6.2.4 TONER SUPPLY CONTROL .........................................................6-12
Toner Supply Control Modes ..............................................................6-12
Low Image Coverage..........................................................................6-13
6.2.5 TONER NEAR END/TONER END DETECTION............................6-14
Introduction .........................................................................................6-14
Toner Near End Detection ..................................................................6-15
Toner End Detection...........................................................................6-15
Toner End Recovery ...........................................................................6-15
6.2.6 DEVELOPER INITIALIZATION ......................................................6-16
6.3 PAPER FEED..........................................................................................6-17
6.3.1 OVERVIEW ....................................................................................6-17
6.3.2 PAPER FEED DRIVE .....................................................................6-18
6.3.3 PAPER TRAY.................................................................................6-19
Paper Lift ............................................................................................6-19
Paper Size Detection ..........................................................................6-20
Paper Size Detection ..........................................................................6-20
Paper Near End/End Detection...........................................................6-21
Near-end detection .............................................................................6-21
End detection......................................................................................6-21
Paper width sensor .............................................................................6-21
By-pass Tray Feed and Size Detection...............................................6-22
6.3.4 DUPLEX .........................................................................................6-23
Drive ...................................................................................................6-24
Interleaving .........................................................................................6-25
6.4 LASER EXPOSURE................................................................................6-26
6.4.1 OVERVIEW ....................................................................................6-26
6.4.2 OPTICAL PATH..............................................................................6-27
6.4.3 LASER SYNCHRONIZING DETECTOR ........................................6-28
Overview.............................................................................................6-28
Main Scan Start Detection ..................................................................6-28
6.4.4 LD SAFETY SWITCH .....................................................................6-29
6.4.5 AUTOMATIC LINE POSITION ADJUSTMENT ..............................6-30
Overview.............................................................................................6-30
Summary of Each Adjustment ............................................................6-31
Main Scan Skew Adjustment ..............................................................6-34
LDU Shutter ........................................................................................6-35
6.5 PHOTOCONDUCTOR UNIT ...................................................................6-36
6.5.1 OVERVIEW ....................................................................................6-36
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