Ricoh G108 Service Manual page 257

1. REPLACEMENT AND ADJUSTMENT ............................................1
1.1 EXTERIOR COVER ..................................................................................... 1
1.2 PAPER GUIDE ............................................................................................. 3
1.2.1 REAR GUIDE ...................................................................................... 3
1.2.2 LOWER GUIDE ................................................................................... 3
1.2.3 TOP GUIDE......................................................................................... 4
1.2.4 UPPER GUIDE .................................................................................... 5
1.3 SCREW BASE.............................................................................................. 5
1.4 CONTROLLER BOARD ............................................................................... 6
1.5 DRIVE PATH ................................................................................................ 6
1.5.1 MOTOR ............................................................................................... 6
1.5.2 GEARS AND TIMING BELTS.............................................................. 7
1.6 ROLLER ....................................................................................................... 8
1.6.1 ENTRANCE ROLLER.......................................................................... 8
1.6.2 UPPER TRANSPORT ROLLER .......................................................... 8
1.6.3 LOWER TRANSPORT ROLLER ......................................................... 9
1.6.4 INVERTING ROLLER.......................................................................... 9
1.6.5 EXIT ROLLER ..................................................................................... 9
1.7 INTERLOCK SAFETY SWITCHES .............................................................. 9
1.8 SENSOR .................................................................................................... 10
1.8.1 PAPER SENSOR 2 ........................................................................... 10
1.8.2 PAPER SENSOR 1 ........................................................................... 10
1.9 PAPER GATE SOLENOID ......................................................................... 11
1.10 STOPPER ................................................................................................ 12
2. DETAILED SECTION DESCRIPTIONS .........................................13
2.1 COMPONENT LAYOUT AND PAPER PATH............................................. 13
2.2 DRIVE LAYOUT ......................................................................................... 14
2.3 DUPLEX PRINTING PROCESS................................................................. 15
2.4 PAPER GATE CONTROL .......................................................................... 16
Solenoid and Lever ................................................................................ 16
Paper Path............................................................................................. 16
Possible Paper Jam ............................................................................... 16
2.5 PAPER TRANSPORT ................................................................................ 17
Overview................................................................................................ 17
Motors and Rollers................................................................................. 17
2.6 SAFETY SWITCHES.................................................................................. 18
3. TROUBLESHOOTING ...................................................................19
3.1 LOOSE CONNECTION .............................................................................. 19
3.2 PAPER JAM ............................................................................................... 20
SM
DUPLEX UNIT G390
TABLE OF CONTENTS
i G390