Ricoh D158 Service Manual page 9

4.3.9 FRONT COVER SWITCH (INTERLOCK SWITCH) ........................ 4-12
4.3.10 FRONT RIGHT COVER ............................................................. 4-12
4.3.11 RIGHT REAR COVER ................................................................ 4-13
4.3.12 DUPLEX UNIT (D158/D159/D160/D161) / RIGHT DOOR (D170)4-14
4.3.13 BY-PASS TRAY .......................................................................... 4-16
4.3.14 RIGHT LOWER COVER (TWO-TRAY MODELS ONLY) ........... 4-17
4.3.15 RIGHT LOWER COVER SWITCH (TWO-TRAY MODELS ONLY)4-17
4.3.16 PLATEN COVER SENSOR ........................................................ 4-18
4.4 SCANNER UNIT (D158/D159) ................................................................. 4-19
4.4.1 EXPOSURE GLASS/DF EXPOSURE GLASS (CCD) .................... 4-20
4.4.2 LENS BLOCK ................................................................................. 4-22
4.4.3 SIO BOARD .................................................................................... 4-23
4.4.4 EXPOSURE LAMP ......................................................................... 4-23
4.4.5 APS SENSOR (LENGTH) ............................................................... 4-24
4.4.6 SCANNER MOTOR ........................................................................ 4-25
4.4.7 SCANNER HOME POSITION SENSOR ........................................ 4-26
4.4.8 FRONT SCANNER WIRE ............................................................... 4-27
Reassembling the Front Scanner Wire............................................... 4-29
4.4.9 REAR SCANNER WIRE ................................................................. 4-33
Reassembling the Rear Scanner Wire ............................................... 4-35
4.4.10 ADJUSTING THE SCANNER POSITIONS ................................ 4-37
4.5 SCANNER UNIT (D160/D161/D170) ....................................................... 4-39
4.5.1 SCANNER UNIT ............................................................................. 4-40
4.5.2 APS SENSORS (WIDTH/LENGTH) ................................................ 4-42
4.5.3 CIS UNIT AND SCANNER DRIVE BELT ........................................ 4-44
4.5.4 EXPOSURE GLASS/DF EXPOSURE GLASS (CIS) ...................... 4-46
4.6 LASER UNIT ............................................................................................ 4-47
4.6.1 LOCATION OF CAUTION DECAL.................................................. 4-47
4.6.2 TONER SHIELD GLASS ................................................................ 4-48
4.6.3 LASER UNIT ................................................................................... 4-48
4.6.4 POLYGONAL MIRROR MOTOR .................................................... 4-49
4.7 PCU SECTION ........................................................................................ 4-50
4.7.1 PCU ................................................................................................ 4-50
4.7.2 PICK-OFF PAWLS AND TONER DENSITY SENSOR ................... 4-51
4.7.3 OPC DRUM .................................................................................... 4-52
4.7.4 CHARGE ROLLER AND CLEANING BRUSH ................................ 4-53
4.7.5 CLEANING BLADE ......................................................................... 4-54
4.7.6 DEVELOPER .................................................................................. 4-55
SM v D158/D159/D160/D161/D170