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Ricoh ST23 Service Manual

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RICOH ST23
SERVICE MANUAL

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  • Page 1 RICOH ST23 SERVICE MANUAL...

  • Page 2: Overall Machine Information

    OVERALL MACHINE INFORMATION 6 March 1992 1. OVERALL MACHINE INFORMATION 1.1 SPECIFICATIONS Configuration: Console Number of Bins: 20 + proof tray Paper for Proof Tray: Size: Maximum: A3, 11" x 17" Minimum: A5, 5 " x 8 " (sideways) Weight: 52 g/m ~ 160 g/m , 14 ~ 43 lb...
  • Page 3 6 March 1992 OVERALL MACHINE INFORMATION Power Consumption: Maximum: 0.2 kW Dimensions: (1st sorter only) 580 x 828 x 1063 mm (22.8" x 32.6" x 41.8") (1st and 2nd sorter) 1120 x 828 x 1063 mm (44.1" x 32.6" x 41.8") Weight: 1st sorter: 98 kg, 216 lb 2nd sorter: 90 kg, 198 lb...

  • Page 4: Mechanical Component Layout

    OVERALL MACHINE INFORMATION 6 March 1992 1.2 MECHANICAL COMPONENT LAYOUT 1. Staple Unit 7. Relay Gate 2. Proof Tray 8. Diagonal Transport Rollers 3. Bins 9. Distribution Rollers 4. Jogger 10. By-pass Tray Gate 5. Bin Solenoids 11. By-pass Tray 6.

  • Page 5: Drive Layout

    6 March 1992 OVERALL MACHINE INFORMATION 1.3 DRIVE LAYOUT 1. Diagonal Transport Drive Belt 2. Bin Drive Belt (1st to 10th) 3. Main Motor 4. Jogger Unit Drive Belt 5. Staple Unit 6. Side Bar Drive Belt 7. Proof Tray Exit Roller Drive Belt 8.

  • Page 6: Electrical Component Description

    OVERALL MACHINE INFORMATION 6 March 1992 1.4 ELECTRICAL COMPONENT DESCRIPTION Symbol Name Function Index No. Motors Main Drives the diagonal transport unit, horizontal transport unit, and distribution unit through timing belts. Staple Unit Drives the staple unit up or down to the Positioning appropriate bin.
  • Page 7 6 March 1992 OVERALL MACHINE INFORMATION Symbol Name Function Index No. Relay Solenoid Turn the relay gate to transport the copy to SOL23 the 2nd sorter. Sensors Entrance Detects paper jams at the entrance of the diagonal transport unit. Registration Detects paper jams at the horizontal transport unit.
  • Page 8 OVERALL MACHINE INFORMATION 6 March 1992 Symbol Name Function Index No. Relay Main Controls main power. Transformer 2nd Sensor Detects paper jam at the relay unit.

  • Page 9: Basic Operation

    6 March 1992 OVERALL MACHINE INFORMATION 1.5 BASIC OPERATION Copies exiting the copier enter the sorter or the by-pass tray [A] depending on the by-pass tray gate [B] position. In normal operation, copies are sent to the sorter, if paper jams occur in the sorter, the remaining papers in the copier are fed to the by-pass tray.

  • Page 10: Sectional Description

    SECTIONAL DESCRIPTION 6 March 1992 2. SECTIONAL DESCRIPTION 2.1 PAPER DELIVERY SWITCHING Depending on the by-pass tray gate [A] position, paper fed from the copier enters either the sorter or the by-pass tray [B]. The by-pass tray gate is driven by the by-pass tray gate motor [C]. Under normal operating conditions, the by-pass tray gate is in the home position (H.P.

  • Page 11: Diagonal Transport

    6 March 1992 SECTIONAL DESCRIPTION 2.2 DIAGONAL TRANSPORT Paper entering the diagonal transport unit is transported down to the horizontal transport unit. The front side of the paper advances more than the back side due to the front transport roller [A] being larger than the back rollers.
  • Page 12 SECTIONAL DESCRIPTION 6 March 1992 2.3 SORTING The distribution section has the distribution rollers [A], 20 bin gates, and 20 bin solenoids. When a bin gate solenoid [B] is off, the return spring [C] holds the bin gate [D] out of the paper path, allowing the copies to pass to the upper bin. The appropriate bin gate solenoid turns on and opens the bin gate.

  • Page 13: Paper Jogging

    6 March 1992 SECTIONAL DESCRIPTION 2.4 PAPER JOGGING [ D] Ordinarily, the side bar [A] is in the home position. It moves to within 10 mm of the rear of the selected paper size. The side bar is driven by the side bar motor [B] through the gears and a timing belt.
  • Page 14 SECTIONAL DESCRIPTION 6 March 1992 2.5 STAPLING 2.5.1 Gripper The grip unit [A] grips and moves the jogged paper to the staple position and returns the stapled paper to the bin. The grip solenoid [B] and grip motor [C] are built into the grip unit. The motor moves the grippers [D] back and forth, and the solenoid [B] controls paper clamping.
  • Page 15 6 March 1992 SECTIONAL DESCRIPTION 2.5.2 Stapler The paper sensor [A] prevents stapler operation when there is no paper in position. Also, it detects staple error if the paper sensor remains actuated when the stapler finishes its operation. The staple motor [B] drives the stapling mechanism and transporting of the staples from the cartridge [C].

  • Page 16: Jogger Unit Positioning

    SECTIONAL DESCRIPTION 6 March 1992 2.6 JOGGER UNIT POSITIONING The jogger unit [A] vertical position is controlled by the stepper motor [B]. Depending on the rotation of the stepper motor [C], the jogger unit moves to the appropriate bin. When the main switch is turned on, the jogger unit will stop in its home position.

  • Page 17: Staple Unit Positioning

    6 March 1992 SECTIONAL DESCRIPTION 2.7 STAPLE UNIT POSITIONING The staple unit [A] is hanging on the timing belt [B]. Due to the weight of this staple unit, accurate positioning is ensured by using worm gear [C] which transmits the staple positioning motor [D] rotation to the timing belt. The bracket [E] guiding the staple unit has notches [F] which the staple unit position sensor [G] senses.

  • Page 18: 1St And 2Nd Sorter Connection

    SECTIONAL DESCRIPTION 6 March 1992 2.8 1ST AND 2ND SORTER CONNECTION When the 2nd sorter is connected, paper must be relayed from the 1st sorter to the 2nd sorter. A relay solenoid [A] has been added to the 1st sorter for this purpose.

  • Page 19: Door Switches

    6 March 1992 SECTIONAL DESCRIPTION 2.9 DOOR SWITCHES Doors and guide plates are provided to enable removal of misfed papers. Each door has a safety switch to detect opening and closing. These switches also perform the jam reset function.

  • Page 20: Jam Detection

    SECTIONAL DESCRIPTION 6 March 1992 2.10 JAM DETECTION 2.10.1 Jam Detection Condition The jam detection timing is determined by pulses from the timing sensor. The diagram below illustrates the timing interval in which each sensor detects paper jams in operation. Paper Exit Signal from Copier 340 pls Entrance...
  • Page 21 6 March 1992 SECTIONAL DESCRIPTION 2.10.2 Machine Operation in Jam Conditions a. When a paper jam occurs in the copier, the sorter stapler stops after delivering papers in the sorter to the appropriate bins. b. When a paper jam occurs in the sorter stapler, the by-pass tray gate motor energizes and papers in the copier are delivered to the by-pass tray.

  • Page 22: Installation Procedure

    INSTALLATION PROCEDURE 6 March 1992 3. INSTALLATION PROCEDURE 3.1 1ST SORTER STAPLER 3.1.1 Accessories 1. Tray Extension..........1 2. Original Guard ..........1 3. Upper Stay............ 1 4. Lower Stay............ 1 5. Harness Cover..........1 6. Front Door............. 1 7. Lower By-pass Tray........1 8.
  • Page 23 6 March 1992 INSTALLATION PROCEDURE CAUTION: Unplug the copier power cord before starting the following procedure. 1. Remove the strips of filament tape [A] and remove the cushion [B] protecting the vertical transport door. 2. Remove the strips of filament tape [C] and remove the cushions [D] protecting the bins.
  • Page 24 INSTALLATION PROCEDURE 6 March 1992 9. Remove the right cover [A] of the copier (2 screws) and the plastic cap [B]. Reinstall the right cover passing the interface harness [C] (3 connectors and 1 ground wire) through the lower hole of the right cover. 10.
  • Page 25 6 March 1992 INSTALLATION PROCEDURE 11. Open the diagonal transport door [A] and remove the front cover [B] (2 screws) of the diagonal transport unit. 12. Set the connectors of the interface harness [C] from the copier to the diagonal transport unit [D]. 13.
  • Page 26 INSTALLATION PROCEDURE 6 March 1992 16. Stick the original guard [A] onto the upper cover [B] of the 1st sorter. NOTE: Stick it 140 mm from the end of the cover. 17. Install the tray extension [C]. 18. Join the 1st sorter to the diagonal transport unit, pressing the 1st sorter until the two latches [D] lock together.
  • Page 27 6 March 1992 INSTALLATION PROCEDURE 21. Install the harness cover [A] (2 M4 x 6 screws). 22. Fix the ground line [B] of the diagonal transport unit (M4 x 8 with star washer). 23. Install the front cover [C] of the diagonal transport unit (2 screws) and set the front door [D].

  • Page 28: 2Nd Sorter Stapler

    6 March 1992 INSTALLATION PROCEDURE 3.2 2ND SORTER STAPLER 3.2.1 Accessories 1. Relay Unit ............. 1 2. Optical Fiber Cable........1 3. Tray Extension..........1 4. Interface Board ..........1 5. Joint Bracket ..........1 6. Harness Cover Bracket ........ 1 7.
  • Page 29 INSTALLATION PROCEDURE 6 March 1992 CAUTION: Unplug the copier power cord before starting the following procedure. 1. Remove the strip of filament tape [A] fixing the relay unit cover [B]. 2. Remove the strips of filament tape [C] and remove the cushions [D] protecting the bins.
  • Page 30 6 March 1992 INSTALLATION PROCEDURE 8. Remove the rear cover of the 1st sorter (6 screws). 9. Remove the lower right cover [A] (2 screws), motor cover [B] (2 screws), and 2 studs [C] from the 1st sorter. Install them on the 2nd sorter. 10.
  • Page 31 INSTALLATION PROCEDURE 6 March 1992 15. Install the motor cover [A] (M4 x 6 pan head screw [B] and M4 x 6 screw with spring washer [C]) and the bin bottom bracket [D] (truss head screw [E] and double washer screw [F]) both packed with the 2nd sorter to the 1st sorter.
  • Page 32 6 March 1992 INSTALLATION PROCEDURE 20. Join the 2nd sorter to the relay unit and set the timing belt [A]. Then hook the spring [B] of the tension pulley bracket. 21. Remove the front cover [C] of the horizontal transport unit (2 screws). 22.
  • Page 33 INSTALLATION PROCEDURE 6 March 1992 28. 220/230/240 V version only If the voltage of electrical power supply from wall outlets is 220 V or 240 V, change the voltage as follows: a) Disconnect the input line [A] from the 230 V connector. b) Connect the input line to the appropriate voltage (220 V or 240 V).

  • Page 34: Service Tables

    6 March 1992 SERVICE TABLES 4. SERVICE TABLES 4.1 TEST POINT TABLE (Main Board) Number Function TP100 TP101 TP102 24 V TP103 Lower Staple Unit Trigger (SP Mode) 4.2 LED AND VARIABLE RESISTOR TABLE (Main Board) LED No. VR No. Function Adjusts jam sensor sensitivity Adjusts bin sensor sensitivity...

  • Page 35: Dip Sw Table

    SERVICE TABLES 6 March 1992 4.4 DIP SW TABLE DIP SW100 (MODE) SP mode Function Initial Normal Setting Sorter Free Run Staple Unit Free Run Sorter & Staple Unit Free Run Lower Staple Unit Bin/Jam Sensor Adjustment 0: OFF 1: ON 1.
  • Page 36 6 March 1992 SERVICE TABLES DIP SW101 (STAPLE) Staple position adjustment Staple Position Standard Value 0.5 mm shifted 1.0 mm shifted 1.5 mm shifted 2.0 mm shifted 2.5 mm shifted 3.0 mm shifted 3.5 mm shifted (+) Direction (farther from the edge) (--) Direction (closer to the edge) 0: OFF 1: ON --: Not concerned DIP SW101-1, 101-2, and 101-3 determines the length...

  • Page 37: Maintenance Table

    SERVICE TABLES 6 March 1992 4.5 MAINTENANCE TABLE Items Standard Procedure Tools Clean the rollers if they are soiled. A cloth dampened with Rollers alcohol Clean the rollers if they are soiled. A cloth dampened with Bins alcohol Clean the rollers if they are soiled. A cloth dampened with Sensors alcohol Lubricate the bushings if they...

  • Page 38: Replacement And Adjustment

    6 March 1992 REPLACEMENT AND ADJUSTMENT 5. REPLACEMENT AND ADJUSTMENT 5.1 BIN/JAM SENSOR ADJUSTMENT NOTE: This adjustment should be performed when the main board or the bin/jam sensor is replaced. 1. Remove the rear cover. 2. Confirm that there is no paper on the bins. 3.

  • Page 39: Staple Position Adjustment

    REPLACEMENT AND ADJUSTMENT 6 March 1992 5.2 STAPLE POSITION ADJUSTMENT NOTE: This adjustment should be performed when the main board or staple unit is replaced. X Direction 1. Check the position of the staple [A] on the copy paper. 2. Remove the upper cover [B] (4 screws),open the vertical transport door [C] and remove the left front cover [D] (4 screws).

  • Page 40: Side Bar Adjustment

    6 March 1992 REPLACEMENT AND ADJUSTMENT 5.3 SIDE BAR ADJUSTMENT 1. Remove the upper cover [A] and the rear cover [B]. 2. Manually move the side bar [C] towards the front side of the bin side bar slot [D], by turning the side bar motor manually. 3.

  • Page 41: Belt Tension Adjustment

    REPLACEMENT AND ADJUSTMENT 6 March 1992 5.4 BELT TENSION ADJUSTMENT 1. Detach the diagonal transport unit from the copier, remove the rear cover of the diagonal transport unit, and adjust the belt [A] tension with tightener [a]. Standard [A]: 8 mm deflection at 100 ±...
  • Page 42 6 March 1992 REPLACEMENT AND ADJUSTMENT 3. Remove the upper cover of the distribution unit and adjust the belt [H] tension with the tightener [L]. Standard [H]: 5 mm deflection at 170 ± 30 g pressure 4. Remove the upper cover and right cover then adjust the belt [I] tension with the tightener [i].

  • Page 43: Staple Elevator Unit Removal

    REPLACEMENT AND ADJUSTMENT 6 March 1992 5.5 STAPLE ELEVATOR UNIT REMOVAL 1. Remove the upper cover, the front door, the right front cover. 2. Remove the staple unit [A] (1 screw). 3. Remove the two screws fixing the flat cable [B] and disconnect the three connectors [C].

  • Page 44: Bin Removal

    6 March 1992 REPLACEMENT AND ADJUSTMENT 5.6 BIN REMOVAL 1. Remove the upper cover [A], the rear cover [B], the front door [C] the right front cover [D], and the lower right cover [E]. 2. Remove off the side bar [F] from the side bar holder [G] and remove it. 3.

  • Page 45: Bin/Jam Sensor Removal

    REPLACEMENT AND ADJUSTMENT 6 March 1992 5.7 BIN/JAM SENSOR REMOVAL Upper Bin/Jam Sensor 1. Remove the upper cover (4 screws). 2. Remove the bin/jam sensor bracket [A] (1 screw). 3. Replace the upper bin/jam sensor [B] (1 screw). 4. Adjust the sensor sensitivity by turning VR100 and 101 on the main board. Lower Bin/Jam Sensor 1.

  • Page 46: Sorter Detachment

    6 March 1992 REPLACEMENT AND ADJUSTMENT 5.8 SORTER DETACHMENT 1. Remove the front cover [A] of the diagonal transport unit (2 screws) and remove the front door [B]. 2. Remove the harness cover [C] (2 screws). 3. Disconnect the 5 connectors [D], the fiber optic cable [E] and remove the screw [F] fixing the ground line.

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