Ricoh G188 Service Manual page 15

4.2 SPECIAL TOOLS .......................................................................................4-2
4.3 IMAGE ADJUSTMENT ...............................................................................4-3
4.3.1 REGISTRATION................................................................................4-3
Image Area ...........................................................................................4-3
Leading Edge........................................................................................4-3
Side to Side ..........................................................................................4-3
Adjustment Standard ............................................................................4-3
Paper Registration Standard.................................................................4-3
Adjustment Procedure ..........................................................................4-3
4.3.2 ERASE MARGIN ADJUSTMENT ......................................................4-4
4.3.3 COLOR REGISTRATION..................................................................4-5
Line Position Adjustment ......................................................................4-5
4.3.4 GAMMA ADJUSTMENT....................................................................4-6
Summary ..............................................................................................4-6
Adjustment Procedure ..........................................................................4-7
4.4 EXTERIOR COVERS ...............................................................................4-10
4.4.1 FRONT DOOR ................................................................................4-10
4.4.2 LEFT COVER ..................................................................................4-11
4.4.3 REAR COVER.................................................................................4-11
4.4.4 TOP RIGHT AND REAR COVER....................................................4-12
4.4.5 RIGHT REAR COVER.....................................................................4-12
4.4.6 OPERATION PANEL.......................................................................4-13
4.4.7 PAPER EXIT COVER......................................................................4-13
4.4.8 OUTPUT TRAY ...............................................................................4-13
4.4.9 OZONE FILTER ..............................................................................4-14
Ozone filter for charge unit..................................................................4-14
Ozone filter for IH inverter...................................................................4-15
4.5 LASER OPTICS .......................................................................................4-16
4.5.1 CAUTION DECAL LOCATION ........................................................4-16
4.5.2 LASER OPTICS HOUSING UNIT ...................................................4-16
Preparing the new laser optics housing unit .......................................4-17
Before removing the old laser optics housing unit ..............................4-17
Recovery procedure for no replacement preparation of laser optics
housing unit ........................................................................................4-17
Removing the old laser optics housing unit.........................................4-18
Installing a new Laser Optics Housing Unit.........................................4-19
After installing the new laser optics housing unit ................................4-20
4.5.3 POLYGON MIRROR MOTOR AND DRIVE BOARD.......................4-21
4.6 IMAGE CREATION ..................................................................................4-23
4.6.1 PCU.................................................................................................4-23
4.6.2 SECOND DUCT FAN ......................................................................4-24
When reinstalling the second duct fan ................................................4-25
4.6.3 THIRD DUCT FAN ..........................................................................4-25
When reinstalling the third duct fan.....................................................4-26
4.6.4 TONER PUMP UNIT .......................................................................4-26
When you install the new toner pump unit ..........................................4-29
4.6.5 TONER END SENSOR ...................................................................4-31
4.7 IMAGE TRANSFER..................................................................................4-33
4.7.1 IMAGE TRANSFER BELT UNIT .....................................................4-33
SM iii G188/G189