Ricoh A231 Manuel d'entretien - Page 12

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2. DETAILED DESCRIPTION........................................................ 12-7

2.1 ORIGINAL FEED-IN PREPARATION MECHANISM.............................. 12-7

Original Stopper Release (top diagram):............................................ 12-7

Pick-up Roller Release (bottom diagram): ......................................... 12-7

2.2 PICK-UP AND SEPARATION MECHANISM.......................................... 12-8

2.3 ORIGINAL FEED MECHANISM ............................................................. 12-9

2.4 ORIGINAL FEED DRIVE MECHANISM ............................................... 12-10

Original Feed Start ........................................................................... 12-10

Original Feed.................................................................................... 12-10

2.5 ORIGINAL SIZE DETECTION .............................................................. 12-11

2.6 ORIGINAL TRANSPORT MECHANISM............................................... 12-12

2.7 ORIGINAL SKEW CORRECTION MECHANISM ................................. 12-13

2.8 ORIGINAL INVERSION AND FEED-OUT MECHANISM ..................... 12-14

2.8.1 GENERAL OPERATION.............................................................. 12-14

2.8.2 ORIGINAL INVERSION MECHANISM ........................................ 12-15

2.8.3 ORIGINAL EXIT MECHANISM

(SINGLE-SIDED ORIGINAL MODE) ........................................... 12-16

2.8.4 ORIGINAL EXIT MECHANISM

(DOUBLE-SIDED ORIGINAL MODE).......................................... 12-17

2.9 STAMP ................................................................................................. 12-18

2.10 JAM CONDITIONS ............................................................................. 12-19

2.11 TIMING CHARTS ............................................................................... 12-20

2.11.1 A4 SIDEWAYS: ONE-SIDED ORIGINAL

(3 ORIGINALS).......................................................................... 12-20

2.11.2 A4 SIDEWAYS: TWO-SIDED ORIGINAL

(2 ORIGINALS).......................................................................... 12-21

3. SERVICE TABLES .................................................................. 12-22

3.1 DIP SWITCHES.................................................................................... 12-22

3.2 TEST POINTS ...................................................................................... 12-22

3.3 VARIABLE RESISTORS....................................................................... 12-22

3.4 FUSES.................................................................................................. 12-22

4. REPLACEMENT AND ADJUSTMENT.................................... 12-23

4.1 COVER REPLACEMENT ..................................................................... 12-23

Front Cover Removal ....................................................................... 12-23

Rear Cover Removal........................................................................ 12-23

Left Cover Removal ......................................................................... 12-23

Upper Exit Cover Removal............................................................... 12-23

Original Tray Removal ..................................................................... 12-23

Upper Cover Removal...................................................................... 12-23

4.2 FEED UNIT REMOVAL AND SEPARATION ROLLER

REPLACEMENT ................................................................................... 12-24

4.3 FEED BELT REPLACEMENT .............................................................. 12-25

4.4 SENSOR REPLACEMENT................................................................... 12-26

4.4.1 ORIGINAL SET, ORIGINAL WIDTH AND

REGISTRATION SENSORS ....................................................... 12-26

Original Set Sensor .......................................................................... 12-26

A230/A231/A232