Ricoh B291 Service Manual page 707

1. REPLACEMENT AND ADJUSTMENT ............................................1
1.1 COVERS ...................................................................................................... 1
1.2 ORIGINAL FEED UNIT ................................................................................ 2
1.3 ORIGINAL PICK-UP ROLLER...................................................................... 2
1.4 ORIGINAL FEED BELT ................................................................................ 3
1.5 SKEW CORRECTION/INTERVAL/ REGISTRATION/ORIGINAL WIDTH
SENSORS ........................................................................................................... 4
1.6 ORIGINAL LENGTH SENSORS .................................................................. 5
1.7 SEPARATION ROLLER ............................................................................... 5
1.8 INVERTER /ORIGINAL SET SENSORS ...................................................... 6
1.9 PICK-UP MOTOR/ORIGINAL STOPPER HP SENSOR/PICK-UP HP
SENSOR ............................................................................................................. 6
1.10 TRANSPORT MOTOR AND INVERTER MOTOR ..................................... 7
1.11 FEED MOTOR, SKEW CORRECTION ROLLER CLUTCH ....................... 8
1.12 EXIT SENSOR ........................................................................................... 9
1.13 STAMP SOLENOID.................................................................................... 9
1.14 CONTROLLER BOARD ............................................................................. 9
2. TROUBLESHOOTING ...................................................................10
2.1 TIMING CHARTS ....................................................................................... 10
2.1.1 A4(S)/LT(S) SINGLE-SIDED ORIGINAL MODE ............................... 10
2.1.2 A4(S)/LT(S) DOUBLE-SIDED ORIGINAL MODE .............................. 11
2.2 JAM DETECTION....................................................................................... 12
3. SERVICE TABLES.........................................................................13
3.1 DIP SWITCHES.......................................................................................... 13
3.2 TEST POINTS ............................................................................................ 13
3.3 FUSES ....................................................................................................... 13
4. DETAILED DESCRIPTIONS ..........................................................14
4.1 MAIN COMPONENTS ................................................................................ 14
4.2 DRIVE LAYOUT ......................................................................................... 15
4.3 ORIGINAL SIZE DETECTION.................................................................... 16
4.3.1 BASIC MECHANISM ......................................................................... 16
4.3.2 MIXED ORIGINAL SIZE MODE ........................................................ 18
4.4 ORIGINAL FEED-IN MECHANISM ............................................................ 19
4.4.1 PICK-UP AND SEPARATION ........................................................... 19
4.4.2 ORIGINAL SKEW CORRECTION ..................................................... 20
4.4.3 REDUCING THE INTERVAL BETWEEN PAGES ............................. 20
4.5 ORIGINAL TRANSPORT AND EXIT.......................................................... 21
4.5.1 SINGLE-SIDED ORIGINALS............................................................. 21
4.5.2 DOUBLE-SIDED ORIGINALS ........................................................... 22
4.6 STAMP ....................................................................................................... 23
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CÓPIA NÃO CONTROLADA
ARDF B714
TABLE OF CONTENTS
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CÓPIA NÃO CONTROLADA
B714