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Ricoh SR790 User Manual
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Ricoh SR790 User Manual

Ricoh SR790 User Manual

1000-sheet finisher
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1000-SHEET FINISHER
(Machine Code: B408)

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Summary of Contents for Ricoh SR790

  • Page 1 1000-SHEET FINISHER (Machine Code: B408)
  • Page 2 26 July 2002 MAIN PCB 1. REPLACEMENT AND ADJUSTMENT CAUTION Turn off the main power switch and unplug the machine before beginning any of the procedures in this section. NOTE: This manual uses the following symbols. ! : Screws " : Connector # : Clip ring ☛...
  • Page 3 STAPLER UNIT 26 July 2002 1.2 STAPLER UNIT 1. Side cover [A] (! x 2) 2. Open exit guide plate [B] 3. Upper side cover [C] (! x 2) B408R102.WMF 4. Front cover support plate [D] (! x 1) 5. Front cover [E] 6.
  • Page 4 26 July 2002 MOTORS 1.3 MOTORS 1.3.1 SHIFT MOTOR 1. Rear cover (☛1.1) 2. Shift motor [A] (! x 2, " x 1) B408R123.WMF 1.3.2 STAPLER MOTOR 1. Rear cover (☛1.1) 2. Stapler motor [A] (! x 2, " x 1) B408R124.WMF B408-3...
  • Page 5 MOTORS 26 July 2002 1.3.3 UPPER TRANSPORT MOTOR AND EXIT MOTOR 1. Rear cover (☛1.1) 2. Motor assembly [A] (! x 4, " x 2) 3. Upper transport motor [B] (! x 4) 4. Exit motor [C] (! x 4) B408R112.WMF 1.3.4 LOWER TRANSPORT MOTOR 1.
  • Page 6 26 July 2002 MOTORS AND SENSORS 1.4 MOTORS AND SENSORS 1.4.1 PREPARATION 1. Front cover and inner cover (☛1.2) 2. Upper side cover [A] (! x 2) 3. Upper tray [B] (! x 1) B408R116.WMF 4. Lower side cover [C] (! x 2) 5.
  • Page 7 MOTORS AND SENSORS 26 July 2002 1.4.2 STACK HEIGHT SENSOR 1. Stack height sensor assembly [A] (! x 2. Stack height sensor [B] (" x 1) B408R121.WMF 1.4.3 STAPLER TRAY PAPER SENSOR 1. Stapler tray paper sensor [A] (" x 1) B408R120.WMF B408-6...
  • Page 8 26 July 2002 MOTORS AND SENSORS 1.4.4 LOWER TRAY LIFT MOTOR 1. Lower tray lift motor [A] (! x 2, " x 1) B408R119.WMF 1.4.5 STACK FEED-OUT MOTOR 1. Stack feed-out motor [A] (! x 2, " x 1) B408R122.WMF B408-7...

  • Page 9: Troubleshooting

    JAM DETECTION 26 July 2002 2. TROUBLESHOOTING 2.1 JAM DETECTION Mode Content Shift Staple Entrance sensor: The entrance sensor does not turn on ✔ ✔ On check within the normal time after the main machine exit sensor turns on Entrance sensor: The entrance sensor does not turn off ✔...
  • Page 10 26 July 2002 DIP SWITCH SETTINGS 3. SERVICE TABLES 3.1 DIP SWITCH SETTINGS The DIP switches should not be set to any combination other than those listed in the table below. SW100 Description Normal operation mode (Default) Packing mode. • Before packing the machine, do the following: Set switch 1 to 1 then back to zero.
  • Page 11 GENERAL LAYOUT 26 July 2002 4. DETAILED DESCRIPTIONS 4.1 GENERAL LAYOUT B408D101.WMF 1. Upper Tray 8. Stapler 2. Upper Tray Exit Roller 9. Stack Feed-out Belt 3. Entrance Roller 10. Positioning Roller 4. Tray Junction Gate 11. Shift Roller 5. Upper Transport Roller 12.
  • Page 12 26 July 2002 ELECTRICAL COMPONENT LAYOUT 4.2 ELECTRICAL COMPONENT LAYOUT B408D102.WMF B408D103.WMF 1. Upper Cover Switch 12. Jogger Fence HP Sensor 2. Paper Limit Sensor 13. Positioning Roller Solenoid 3. Entrance Sensor 14. Stapler HP Sensor 4. Exit Guide Plate Motor 15.
  • Page 13 ELECTRICAL COMPONENT LAYOUT 26 July 2002 B408D104.WMF 22. Tray Junction Gate Solenoid 23. Lower Tray Lift Motor 24. Lower Tray Lower Limit Sensor 25. Stapler Motor 26. Jogger Fence Motor 27. Stack Feed-out Motor 28. Main Board 29. Lower Transport Motor 30.
  • Page 14 10 August, 2001 ELECTRICAL COMPONENT DESCRIPTION 4.3 ELECTRICAL COMPONENT DESCRIPTION Symbol Name Function Index No. Motors Upper Drives the entrance roller, upper transport Transport rollers, and upper exit tray rollers. Lower Drives the lower transport rollers and Transport positioning roller. Jogger Fence Drives the jogger fences.
  • Page 15 ELECTRICAL COMPONENT DESCRIPTION 26 July 2002 Symbol Name Function Index No. Positioning Moves the positioning roller. SOL3 Roller Switches Lower Tray Detects when the lower tray is at its upper limit Upper Limit position. Front Door Cuts the dc power when the front door is Safety opened.
  • Page 16 26 July 2002 DRIVE LAYOUT 4.4 DRIVE LAYOUT B408D106.WMF B408D105.WMF B408D107.WMF 1. Exit Motor 6. Lower Tray Lift Motor 2. Upper Transport Motor 7. Stack Feed-out Motor 3. Lower Transport Motor 8. Jogger Motor 4. Shift Motor 9. Stapler Motor 5.
  • Page 17 JUNCTION GATES 26 July 2002 4.5 JUNCTION GATES B408D108.WMF Depending on the finishing mode, the copies are directed up, straight through, or down by the combination of the tray junction gate [A] and stapler junction gate [B]. These gates are controlled by the tray junction gate solenoid [C] and stapler junction gate solenoid [D].
  • Page 18 26 July 2002 UPPER TRAY 4.6 UPPER TRAY B408D109.WMF When the paper limit sensor [A] switches on during feed-out for each of three consecutive sheets of paper, paper overflow is detected. B408-17...
  • Page 19 LOWER TRAY UP/DOWN MECHANISMS 26 July 2002 4.7 LOWER TRAY UP/DOWN MECHANISMS B408D112.WMF The vertical position of the lower tray [A] depends on the height of the copied paper stack on the lower tray. The stack height sensor feeler [B] contacts the top of the stack, and the lower tray lift motor [C] controls the tray height.
  • Page 20 26 July 2002 PAPER SHIFT MECHANISM 4.8 PAPER SHIFT MECHANISM B408D110.WMF In the sort/stack mode, the shift roller [A] moves from side to side to separate the sets of copies. The horizontal position of the shift roller is controlled by the shift motor [B] and the shift gear disk [C].
  • Page 21 JOGGER UNIT PAPER POSITIONING MECHANISM 26 July 2002 4.9 JOGGER UNIT PAPER POSITIONING MECHANISM B408D113.WMF B408D114.WMF In staple mode, each sheet of copy paper is vertically and horizontally aligned when it arrives in the jogger unit. For the vertical paper alignment, the positioning roller solenoid [A] turns on shortly after the stapler tray entrance sensor [B] turns off, and the positioning roller [C] pushes the copy against the bottom of the stack stopper [D].
  • Page 22 26 July 2002 EXIT GUIDE PLATE 4.10 EXIT GUIDE PLATE [B] [C] B408D111.WMF When stacking a large size of paper (such as A3, DLT) in the jogger unit, the leading edge of the paper reaches the exit rollers. To prevent the paper from running into the exit rollers and not being aligned correctly, the exit guide plate [A] is moved up to make a gap between the exit rollers.
  • Page 23 STAPLER MECHANISM 26 July 2002 4.11 STAPLER MECHANISM B408D116.WMF The staple hammer motor [A] drives the staple hammer. The staple sheet sensor [B] detects the leading edge of the staple sheet at the stapling position to prevent the hammer from operating if there are no staples at the stapling position.
  • Page 24 26 July 2002 STAPLER UNIT MOVEMENT MECHANISM 4.12 STAPLER UNIT MOVEMENT MECHANISM B408D117.WMF The stapler motor moves the stapler [A] from side to side. After the start key is pressed, the stapler moves from its home position to the stapling position. If two-staple-position mode is selected, the stapler moves to the front stapling position first, then moves to the rear stapling position.
  • Page 25 PAPER FEED-OUT MECHANISM 26 July 2002 4.13 PAPER FEED-OUT MECHANISM B408D118.WMF After the copies have been stapled, the stack feed-out motor [A] starts. The pawl [B] on the stack feed-out belt [C] transports the set of stapled copies up and feeds it to the shift roller.