Ricoh C231 Service Manual page 33

6.5.2 THERMAL HEAD..............................................................................6-9
SPECIFICATIONS............................................................................. 6-9
Thermal Head Control...........................................................................6-9
Thermal Head Protection ......................................................................6-9
6.6 MASTER EJECT UNIT ............................................................................6-10
6.6.1 OVERVIEW ....................................................................................6-10
Procedure ...........................................................................................6-10
6.6.2 MASTER EJECT UNIT OPEN MECHANISM .................................6-11
6.6.3 MASTER CLAMPER OPENING MECHANISM ..............................6-12
Clamper Mechanism ...........................................................................6-12
6.6.4 MASTER EJECT ROLLER MECHANISM ......................................6-13
Mechanism .........................................................................................6-13
6.6.5 PRESSURE PLATE MECHANISM.................................................6-14
Mechanism .........................................................................................6-14
Procedure ...........................................................................................6-14
6.7 MASTER FEED .......................................................................................6-15
6.7.1 OVERVIEW ....................................................................................6-15
Procedure ...........................................................................................6-15
6.7.2 MASTER FEED MECHANISM .......................................................6-16
Mechanism .........................................................................................6-16
Procedure ...........................................................................................6-16
6.7.3 CLAMPER AND TENSION ROLLER MECHANISM.......................6-17
Mechanism .........................................................................................6-18
Procedure ...........................................................................................6-18
6.7.4 CUTTER MECHANISM ..................................................................6-19
6.7.5 MASTER SET COVER SENSOR ...................................................6-20
6.7.6 MASTER MAKING UNIT SLIDE-OUT MECHANISM .....................6-21
6.7.7 MASTER SET MECHANISM ..........................................................6-22
6.8 DRUM......................................................................................................6-23
6.8.1 OVERVIEW ....................................................................................6-23
Procedure ...........................................................................................6-23
6.8.2 DRUM DRIVE MECHANISM ..........................................................6-24
Mechanism .........................................................................................6-24
6.8.3 INK SUPPLY MECHANISM............................................................6-25
6.8.4 INK ROLLER MECHANISM ...........................................................6-26
6.8.5 INK SUPPLY CONTROL ................................................................6-27
Mechanism .........................................................................................6-27
Automatic Ink Supply for a New Drum ................................................6-28
6.8.6 DETECTION OF MASTERS ON THE DRUM ................................6-29
6.8.7 METAL SCREEN............................................................................6-30
6.8.8 DRUM TYPE DETECTION.............................................................6-31
Black drum..........................................................................................6-31
Color drum ..........................................................................................6-31
6.9 PAPER FEED..........................................................................................6-32
6.9.1 OVERALL .......................................................................................6-32
6.9.2 PAPER FEED MECHANISM ..........................................................6-33
6.9.3 PAPER FEED/SEPARATION PRESSURE
ADJUSTMENT MECHANISM.........................................................6-34
SM C231/C237/C238/C248/C267
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