SERVICE MANUAL MJ-1027/1028 FINISHER. File No. SME040041A0 R TTEC Ver01_

Transcription

1 SERVICE MANUAL FINISHER MJ-0/0 File No. SME000A0 R00900-TTEC Ver0_00-09

2 General Precautions for Installation/Servicing/Maintenance for the Finisher MJ-0/0 The installation and service should be done by a qualified service technician.. When installing the Finisher MJ-0/0 to the equipment, be sure to follow the instructions described in the Unpacking/Set-Up Procedure for the MJ-0/0 booklet which comes with each unit of the MJ-0/0.. The MJ-0/0 should be installed by an authorized/qualified person.. Before starting installation, servicing or maintenance work, be sure to turn off and unplug the equipment first.. When serivcing the machines with the power turned ON, be sure not touch live sections and rotating/operating sections.. When selecting the installation site, avoid placing the MJ-0/0 and copier on different levels or inclined floors.. When servicing or maintaining the MJ-0/0, be careful about the rotating or operation sections such as gears, pulleys, sprockets, cams, belts, etc.. When parts are disassembled, reassembly is basically the reverse of disassembly unless otherwise noted in this manual or other related materials. Be careful not to reassemble small parts such as screws, washers, pins, E-rings, toothed washers to the wrong places.. Basically, the machine should not be operated with any parts removed or disassembled. 9. Delicate parts for preventing safety hazard problems (such as breakers, thermofuses, fuses, door switches, sensors, etc. if any) should be handled/installed/adjusted correctly. 0. Use suitable measuring instruments and tools.. During servicing or maintenance work, be sure to check the serial No. plate and other cautionary labels (if any) to see if they are clean and firmly fixed. If not, take appropriate actions.. The PC board must be stored in an anti-electrostatic bag and handled carefully using a wristband, because the ICs on it may be damaged due to static electricity. Before using the wrist band, pull out the power cord plug of the copier and make sure that there is no uninsulated charged objects in the vicinity.. For the recovery and disposal of used MJ-0/0s, consumable parts, packing materials, used batteries, and RAM-ICs including litium batteries, follow the relevant local regulations/rules.. After completing installation, servicing and maintenance of the MJ-0/0, return the MJ-0/0 to its original state, and check operation.

3 . When you move the finisher, do not move it in the direction of the arrow as shown in the figure below otherwise it might fall down. 00 TOSHIBA TEC CORPORATION ALL rights reserved

4 INTRODUCTION This Service Manual contains basic data and figures for the Finisher (MJ-0)/Saddle Stitch Finisher (MJ-0) needed to service the machine in the field. This manual comprises the following chapters: Chapter Chapter Chapter Chapter Chapter Chapter General Description introduces the finisher s features, specifications, and names of parts, and shows how to operate the finisher. Finisher Unit Basic Operation discusses the principles of operation used for the finisher mechanical and electrical systems. It also explains the timing at which these systems are operated. Saddle Stitch Finisher Unit Basic Operation discusses the principles of operation used for the saddle stitcher unit s mechanical and electrical systems. It also explains the timing at which these systems are operated. Mechanical System discusses how the finisher is constructed mechanically, and shows how it may be disassembled/assembled and adjusted. Maintenance and Inspection provides tables of periodically replaced parts and consumables and durables, together with a scheduled servicing chart. Troubleshooting shows how to troubleshoot possible faults and gives electrical parts arrangement diagrams, LED/check pin diagrams by PCB, and self diagnosis tables. Appendix contains diagrams showing tables of signals, overall circuit diagrams and tables of solvents/oils. Descriptions regarding installation are not mentioned in this Service Manual as the Finisher (MJ-0)/Saddle Stitich Finisher (MJ-0) s packing boxes contain Installation Procedures. The descriptions in this Service Manual are subject to change without notice for product improvement or other purposes, and major changes will be communicated in the form of Service Information bulletins. All service persons are expected to have a good understanding of the contents of this Service Manual and all relevant Service Information bulletins, and be able to identify and isolate faults in the machine. i

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6 CONTENTS CHAPTER GENERAL DESCRIPTION I. FEATURES...- II. SPECIFICATIONS...- A. Specifications...- B. Cross Section...- III. Using the Machine...-9 A. Removing Paper Jams from the Finisher Unit...-9 B. Supplying the Finisher Unit with Staples...-0 C. Removing Staple Jams from the Finisher Unit...- D. Removing Paper Jams from the Saddle Stitcher Unit (Saddle Stitch Finisher)...- E. Supplying the Saddle Stitcher Unit with Staples (Saddle Stitch Finisher)...- F. Removing Staple Jams from the Saddle Stitcher Unit (Saddle Stitch Finisher)...- IV. MAINTENANCE BY THE USER...- A. Maintenance by the User...- CHAPTER FINISHER UNIT BASIC OPERATION I. BASIC OPERATION...- A. Outline...- B. Outline of Electrical Circuitry...- C. Inputs to and Outputs from the Finisher Controller PCB...- II. FEED/DRIVE SYSTEM...-0 A. Outline...-0 B. Type of Delivery Paths...- C. Feeding and Delivering...- D. Job Offset...- E. Staple Operation...- F. Stapler Unit...- G. Tray Operation...- H. Detecting the Height of Stack on the Tray...-0 I. Shutter Operation...- J. Buffer Path Operation...- K. Detecting Jams...- III. POWER SUPPLY SYSTEM...- iii

7 CHAPTER SADDLE STITCHER UNIT BASIC OPERATION I. BASIC OPERATION...- A. Outline...- B. Electrical Circuitry...- C. Inputs to and Outputs from the Saddle Stitcher Controller PCB...- II. FEEDING/DRIVE SYSTEM...- A. Outline...- III. PAPER OUTPUT MECHANISM...- A. Outline...- B. Controlling the Inlet Flappers...- C. Controlling the Movement of Sheets...- D. Aligning the Sheets...- E. Controlling the Phase of the Crescent Roller...- IV. STITCHING SYSTEM...- V. FOLDING/DELIVERY SYSTEM...- VI. CHECKING FOR A JAM...- VII. POWER SUPPLY...- CHAPTER MECHANICAL CONSTRUCTION I. FINISHER UNIT...- A. Externals and Controls...- B. FEEDING SYSTEM...-9 C. PCBs...- II. SADDLE STITCHER UNIT...- A. Externals and Controls...- B. SADDLE STITCHER UNIT...- C. PCBs...- D. Accessory...- CHAPTER MAINTENANCE AND INSPECTION I. PERIODICALLY REPLACED PARTS...- A. Finisher Unit...- B. Saddle Stitcher Unit...- II. CONSUMABLES AND DURABLES...- A. Finisher Unit...- B. Saddle Stitcher Unit...- III. PERIODICAL SERVICING...- IV. FIRMWARE UPDATING...- A. Finisher Unit...- B. Saddle Stitcher Unit...- iv

8 CHAPTER TROUBLESHOOTING I. ADJUSTMENTS...- A. Electrical System (finisher unit)...- B. Electrical System (saddle stitcher unit)...- II. ARRANGEMENT OF ELECTRICAL PARTS...- A. Finisher Unit...- B. Saddle Stitcher Unit...- C. Light-Emitting Diodes (LED) and Check Pins by PCB...-0 III. TROUBLESHOOTING...- A. Finisher Unit...- B. Saddle Stitcher Unit...- APPENDIX A. FINISHER UNIT GENERAL TIMING CHART... A- B. SADDLE STITCHER UNIT GENERAL TIMING CHART... A- C. SIGNAL AND ABBREVIATIONS... A- D. FINISHER UNIT CIRCUIT DIAGRAM... A- E. SADDLE STITCHER UNIT CIRCUIT DIAGRAM... A- v

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10 CHAPTER GENERAL DESCRIPTION I. FEATURES...- II. SPECIFICATIONS...- A. Specifications...- B. Cross Section...- III. Using the Machine...-9 A. Removing Paper Jams from the Finisher Unit...-9 B. Supplying the Finisher Unit with Staples...-0 C. Removing Staple Jams from the Finisher Unit...- D. Removing Paper Jams from the Saddle Stitcher Unit (Saddle Stitch Finisher)...- E. Supplying the Saddle Stitcher Unit with Staples (Saddle Stitch Finisher)...- F. Removing Staple Jams from the Saddle Stitcher Unit (Saddle Stitch Finisher)...- IV. MAINTENANCE BY THE USER...- A. Maintenance by the User...-

11 CHAPTER GENERAL DESCRIPTION I. FEATURES. Accommodates large quantities of sheets Normally, the finisher holds a stack of sheets 0 mm in height in its two bins (small-size paper: equivalent to 000 sheets)/0 mm in height (large-size paper: equivalent to 000 sheets). Has high paper transportation performance The finisher is capable of handling papers between 0 and gm/m.. Offers a job offset function The finisher has a job offset function for sorting non-stapled stacks of copies.. Offers four types of auto stapling The finisher offers a choice of four stapling modes (-point stapling at rear, diagonal stapling at front, diagonal stapling at rear, -point stapling).. Uses a buffer roller The use of a buffer roller enables the finisher to accept copies without interruption from the host machine even during stapling or offset operation.. Has a saddle stitch function (Saddle Stitch Finisher MJ-0) The finisher can staple along the center of paper and fold it in two (up to sheets).. Offers a punch function (option) The use of the puncher unit enables the finisher to punch sheets for binders before they are output. (The puncher unit is capable of handling papers between 0 g/m ( lb. Bond) and g/m (. lb. Index). It cannot handle special paper, postcards and transparencies.). Insert function (option) Enable the use of special type of paper and printed paper in addition to the staple sorting or the hole punching mode (Available when the optional staple sorting and the hole punching mode units are installed.) This paper is not run through fuser (heat). -

12 CHAPTER GENERAL DESCRIPTION II. SPECIFICATIONS A. Specifications. Finisher Unit Item Stacking method Stacking orientation Stacking size Paper weight Bins Modes Stacking capacity Size mixing Stacking mixing Description Tray- and -: by lifting tray Face-down AB: A, A, A-R, A-R, B, B, B-R, FOLIO Inch: LD, LG, LT, LT-R, ST-R, COMPUTER 0 to g/m ( lb. Bond to. lb. Index) Tray- and - Non-sort: tray- and - Sort: tray- and - Staple sort: tray- and - Non sort A, B, LT (Note, ) 0 mm (000 sheets) Non staple sort A, A-R, A-R, (Note, ) 0 mm (000 sheets) B, B-R, LD, LG, LT-R, ST-R, FOLIO, COMPUTER Staple sort A, B, LT 0 mm/00 sets (0 sheets) A, A-R, B, mm/0 sets (00 sheets) LD, LG, LT-R, FOLIO, COMPUTER Size mixing: (Note ) mm or less (00 sheets) (Note ) Staple mixing: mm/0 sets or less (00 sheets) Face-down (Note ) (Note ) Notes:. Approximate when computed with reference to 0 g/m (. lb. Bond) paper.. Alignment may not be correct if 0 or more small-size sheets are stacked.. The accuracy of the stack height is ± mm/0. in. Table -0 -

13 CHAPTER GENERAL DESCRIPTION Stapling Item Stapling position Stapling capacity (Note) Staple supply Staples Staple detection Manual stapling Stapling size Available paper weight for stapling Paper detection Control panel Display Dimensions (W D H) Weight Power supply Maximum power consumption By rotating cam See Figure -0. Description Small-size 0 sheets (0 ~ 0 g/m 0 sheets (90 g/m 0 sheets (0 g/m ( ~. lb. Bond)) ( lb. Bond)) ( lb. Bond)) Large-size 0 sheets (0 ~ 0 g/m ) sheets (90 g/m ) sheets (0 g/m ( ~. lb. Bond)) ( lb. Bond)) ( lb. Bond)) Special staple cartridge (000 staples) Special (STAPLE-00: cartridges of 000 staples in a package) Provided Not provided -point diagonal Front A, B, A, A-R, B, LD, LG, LT, LT-R, stapling (diagonal) FOLIO, COMPUTER Rear A, B, A, B, LD, LT, COMPUTER -point Rear A-R, LT-R, LG, FOLIO -point A, B, A, B, A-R, LD, LG, LT, LT-R, FOLIO, COMPUTER 0 to 0 g/m ( lb. Bond to lb. Bond) Provided Not provided Not provided 0 0 mm/.. 0. in mm/ in (sub-tray extended) Finisher (MJ-0): kg/9.0 lb Saddle stitch finisher (MJ-0): kg/.9 lb From host machine (DC V ± 0%, VDC) 0 W or less Note: Including two sheets of thick stock or cover (00 ~ g/m (.9 lb. Cover to. lb. Index)). Table -0 Reference: The term small-size stands for A, A-R, B, LT, ST-R, while the term large-size stands for A, B, A-R, B-R, LT-R, LD, LG, FOLIO, COMPUTER. -

14 CHAPTER GENERAL DESCRIPTION Stapling Positions (finisher unit) -point stapling (rear) -point stapling (diagonal; front) -point stapling (diagonal; rear) 0 0 Specified paper width ±mm/ 0.±0.in ±mm/ 0.±0.in.±mm/ 0.±0.in.±mm/ 0.±0.in Specified paper width ±mm/ 0.±0.in ±mm/ 0.±0.in -point stapling A and A B, B and COMPUTER LD and LT ±mm/ 0.±0.in ±mm/.±0.in 0±mm/.9±0.in ±mm/ 0.±0.in ±mm/.±0.in ±mm/.9±0.in ±mm/ 0.±0.in ±mm/.9±0.in 9±mm/.±0.in A-R and FOLIO LT-R and LG ±mm/ 0.±0.in.±mm/.±0.in.±mm/.±0.in ±mm/ 0.±0in.±mm/.±0.in.±mm/.9±0.in Figure -0 -

15 CHAPTER GENERAL DESCRIPTION. Saddle Stitcher Unit Item Stapling method Folding position Paper size Capacity Paper weight Stacking capacity (Note ) Stapling Folding Power supply Center binding (double folding) See Figure -0. A, B, A-R, LD, LT-R, LG Description With binding: sheet Without binding (including single cover page) : to sheets (0 ~ 0 g/m / ~. lb. Bond) : to 0 sheets ( ~ 0 g/m /.~ lb. Bond) 0 to 0 g/m (cover page up to g/m ) A B A-R LD LT-R LG (Note ) 0 ~ 0g/m () sets: stack of sheets or less ( ~. lb. Bond) 0 (0) sets: stack of to 0 sheets 0 (0) sets: stack of to sheets ~ 0 g/m () sets: stack of sheets or less (. ~ lb. Bond) () sets: stack of to 0 sheets 0 ~ 0g/m 0 (0) sets: stack of sheets or less ( ~. lb. Bond) 0 (0) sets: stack of to 0 sheets 0 (0) sets: stack of to sheets ~ 0 g/m 0 () sets: stack of sheets or less (. ~ lb. Bond) 0 () sets: stack of to 0 sheets points (center distribution; fixed interval) 000 staples Special cartridge Special staples (STAPLE-00: cartridges of 000 staples in a package) Provided Not provided Stapling position Staple accommodation Staple supply Staples Staple detection Manual stapling Folding method Folding mode Folding position Position adjustment From finisher unit DCV, DCV Roller contact Double folding Paper center Provided Note: Special paper, postcards, transparencies, reproducibles, label paper and hole-punched paper cannot be handled. Note: The values in ( ) include a sheet of cover page (00 to g/m (.9 lb. Cover to. lb. Index)). Table -0 -

16 CHAPTER GENERAL DESCRIPTION Staple and Folding Position (saddle stitcher unit) A B A-R Staple position 0±mm/.±0.0in Edge of staple Edge of staple ±mm/.±0.0in.±mm/.±0.0in ±mm/.±0.in 0±mm/.0±0.in Stack front edge ±mm/.±0.in ±mm/.0±0.in 9.±mm/.±0.in 9.±mm/.±0.in LD LT-R LG ±mm/.±0.0in 9.±mm/.±0.0in.±.0mm/.0±0.0in ±mm/.9±0.in 9±mm/.±0.in ±mm/.±0.in ±mm/.±0.in ±mm/.±0.in ±mm/.±0.in Figure -0 -

17 CHAPTER GENERAL DESCRIPTION B. Cross Section. Finisher Unit [] [] [] [] [] [] [] [] [9][0] [] [] [] [] [] [] [] [] Tray -/- [] Shutter [] Delivery roller [] Swing guide [] Feed roller [] Height sensor [] Wrap flapper [] Buffer roller [9] Buffer inlet flapper [0] Saddle stitcher flapper [] Inlet feed roller [] Feed roller [] Vertical path [] Stapler [] Feed belt [] Tray lift motor [] Saddle stitcher unit (saddle stitch finisher MJ-0) Figure -0 -

18 CHAPTER GENERAL DESCRIPTION. Saddle Stitcher Unit [] [] [] [] [9] [] [] [] [0] [] [] [] [] Guide plate [] Paper folding roller [] Delivery guide plate [] Holding roller [] Stitcher (front, rear) [] Inlet roller [] No. flapper [] No. flapper [9] Stitcher mount [0] Paper pushing plate [] Crescent roller [] Paper positioning plate Figure -0 -

19 CHAPTER GENERAL DESCRIPTION III. Using the Machine ) Open the upper cover, and check the inside of the finisher. A. Removing Paper Jams from the Finisher Unit If the host machine indicates the finisher paper jam message, perform the following to remove the jam. ) Pressing the release button of the finisher, move the finisher carefully away from the host machine. Figure -0 ) Lift the buffer roller cover, and remove the jam. Figure -0 ) Remove any jam visible from the outside. Figure -0 ) Lift the buffer roller, and remove the jam. Figure -0 Figure -0-9

20 CHAPTER GENERAL DESCRIPTION ) Return the buffer roller and the buffer roller cover to their original positions, and close the upper cover. B. Supplying the Finisher Unit with Staples If the host machine indicates the finisher unit staple supply message, perform the following to supply it with staples. ) Open the front cover. Figure -0 ) Connect the finisher to the host machine. Figure -0 ) Shift down the green lever. Figure -0 ) Operate as instructed on the display. Figure -09 ) When the staple cartridge has slightly slid out, hold and pull it out. Figure -0-0

21 CHAPTER GENERAL DESCRIPTION ) Hold the empty staple case on its sides, and slide it out. ) Pull the length of tape (used to hold the staples in place) straight out. Figure - ) Set a new staple case. Figure - ) Push in the stapler unit until the green lever returns to its original position. Figure - Reference: You may set no more than one staple cartridge at a time. Make sure that the new cartridge is one specifically designed for the finisher unit. Figure - ) Check to make sure that the stapler has been locked in place, and close the front cover. Figure - -

22 CHAPTER GENERAL DESCRIPTION C. Removing Staple Jams from the Finisher Unit ) When the staple cartridge has slightly slid out, hold and pull it out. If the host machine indicates the finisher unit staple jam message, perform the following to remove the jam. ) Remove the stack waiting to be stapled from the delivery tray. Figure -9 ) Shift down the tab on the staple cartridge. Figure - ) Open the front cover. Figure -0 ) Remove all staples that have slid out of the staple case. Figure - ) Shift down the green lever. Figure - Figure - -

23 CHAPTER GENERAL DESCRIPTION ) Return the tab on the staple cartridge to its original position. ) Return the staple cartridge to its original position, and close the front cover. D. Removing Paper Jams from the Saddle Stitcher Unit (Saddle Stitch Finisher) If the host machine indicates the saddle stitcher unit paper jam message, perform the following to remove the jam. ) Pressing the release button of the finisher, move the finisher carefully away from the host machine. Figure - Reference When the cover has been closed, the stapler unit will automatically execute idle punching several times to advance the staples. Figure - ) Open the front lower cover. Figure - -

24 CHAPTER GENERAL DESCRIPTION ) Turn the knob on the left side. ) Open the inlet cover, and remove the jam. Figure - ) Turn the knob on the right side while pushing it in. Figure - ) Close the front lower cover. ) Remove the jam. Figure - Figure -9 ) Connect the finisher unit. 9) Operate as instructed on the display. Figure - -

25 CHAPTER GENERAL DESCRIPTION E. Supplying the Saddle Stitcher Unit with Staples (Saddle Stitch Finisher) ) Pull the stitcher unit to the front once, and then shift it up. If the host machine indicates the saddle stitcher unit staple supply message, perform the following to supply it with staples. ) Open the front lower cover. Figure - ) Hold the empty cartridge on its sides, and remove it. Figure -0 ) Slide out the stitcher unit. Figure - ) Set a new cartridge. Figure - Figure - Reference You must always replace both cartridges at the same time. -

26 CHAPTER GENERAL DESCRIPTION ) Pull the stitcher to the front once, and then return it to its original position. F. Removing Staple Jams from the Saddle Stitcher Unit (Saddle Stitch Finisher) If the host machine indicates the saddle stitcher unit staple jam message, perform the following to remove the jam. ) Open the front lower cover. Figure - ) Push in the stitcher unit, and close the front cover. Figure - ) Slide out the stitcher unit. Figure - Figure - ) Pull the stapler of the stitcher unit to the front once, and then shift it up. - Figure -9

27 CHAPTER GENERAL DESCRIPTION ) Hold the cartridge on its sides, and remove it. ) Return the cartridge to its original position. Figure -0 ) Push down on the area identified as A, and pull up the tab identified as B. Figure - ) Pull the stitcher of the stitcher unit to the front once, and then return it to its original position. Figure - ) Remove the staple jam, and return the tab B to its original position. Figure - 9) Push the stitcher unit back to its original position, and close the front lower cover. Figure - Figure - Reference Whenever you have removed a staple jam, be sure to execute staple edging. -

28 CHAPTER GENERAL DESCRIPTION IV. MAINTENANCE BY THE USER A. Maintenance by the User No. Item Replacing the staple cartridge (finisher unit) Replacing the staple cartridge (saddle stitcher unit) Timing When the appropriate indication is made on the host machine s display. Caution: The finisher unit and the saddle stitcher unit use different cartridge types. Be sure that the appropriate type is used for each. Table -0 -

29 CHAPTER FINISHER UNIT BASIC OPERATION. This chapter discusses the purpose and role of each of the finisher s functions, and the principles of operation used for the finisher mechanical and electrical systems. It also explains the timing at which these systems are operated.the symbol in drawings indicates transmission of mechanical drive, and signals marked by together with the signal name indicates the flow of electrical signals.. In descriptions of digital circuits on the finisher, indicates a high signal voltage level, while 0 indicates a low signal voltage level. Voltage values differ according to circuit. A microprocessor is used on the finisher. A description of microprocessor operation is omitted in this chapter as it is practically impossible to check internal operation of the microprocessor. Descriptions in this chapter also assume that PCBs will not be repaired at user sites. For this reason, descriptions of circuits on PCBs is limited to block diagrams. Two types of block diagrams are provided for separate functions: diagrams indicating details from sensors up to input sections of major PCBs, and diagrams indicating details from the output sections of major PCBs up the loads. I. BASIC OPERATION...- A. Outline...- B. Outline of Electrical Circuitry... - C. Inputs to and Outputs from the Finisher Controller PCB...- II. FEED/DRIVE SYSTEM...-0 A. Outline...-0 B. Type of Delivery Paths...- C. Feeding and Delivering...- D. Job Offset...- E. Staple Operation...- F. Stapler Unit...- G. Tray Operation...- H. Detecting the Height of Stack on the Tray...-0 I. Shutter Operation...- J. Buffer Path Operation...- K. Detecting Jams...- III. POWER SUPPLY SYSTEM...-

30 CHAPTER FINISHER UNIT BASIC OPERATION I. BASIC OPERATION A. Outline The finisher is designed to deliver copies arriving from its host machine, and its modes of delivery include simple stacking, job offset (Note), and staple. All operations involved in these modes are controlled by the finisher controller PCB, according to the appropriate commands from the host machine. In the case of the Saddle Stitch Finisher, copies from the host machine may be routed to the saddle stitcher unit. Swing guide drive system Tray drive system Control system Alignment drive system Stapler drive system Delivery drive system Feeder drive system Shutter drive system Tray drive system Saddle stitcher unit control system (Saddle Stitch Finisher) Figure -0 Note: The term job offset refers to shifting each sorting job, separating a single stack into several stacks. -

31 CHAPTER FINISHER UNIT BASIC OPERATION B. Outline of Electrical Circuitry The finisher s sequence of operation is controlled by the finisher controller PCB. The finisher controller PCB is a -bit microprocessor (CPU), and is used for communication with the host machine (serial) in addition to controlling the finisher s sequence of operations. The finisher controller PCB responds to the various commands coming from the host machine through a serial communications line to drive solenoids, motors, and other loads. In addition, it communicates the finisher s various states (information on sensors and switches) to the host machine through a serial communications circuit. In the case of the Saddle Stitch Finisher, the finisher controller PCB not only communicates with the saddle stitcher controller PCB but also communicates the saddle stitcher unit s various states (information on sensors and switches) to the host machine. The ICs used on the finisher controller PCB are designed for the following: IC (CPU) Controls sequence of operations. IC (EP-ROM) Backs up adjustment values. IC Contains sequence programs. IC/IC (RAM) Backs up initial setting data. IC (communications IC) Communicates with the host machine and the saddle stitcher unit. IC9 (regulator IC) Generates PWM. Figure -0 shows the flow of signals between the finisher and the options controller. -

32 CHAPTER FINISHER UNIT BASIC OPERATION Saddle stitcher controller PCB (Saddle Stitch Finisher) Punch driver PCB (Puncher unit (option)) Host machine (DC controller PCB CPU) Finisher controller PCB communication IC CPU IC EEP-ROM IC IC IC EP-ROM IC/IC RAM Motor Solenoid Switch Sensor IC9 Regulator IC Connecting with inserter Saddle stitcher controller PCB (Saddle Stitch Finisher) Punch driver PCB (Puncher unit (option)) Finisher controller PCB communication IC CPU IC EEP-ROM IC IC Motor Solenoid Switch Sensor Host machine (DC controller PCB CPU) Inserter driver PCB (Inserter unit (option)) IC EP-ROM IC/IC RAM IC9 Regulator IC Figure -0 -

33 CHAPTER FINISHER UNIT BASIC OPERATION C. Inputs to and Outputs from the Finisher Controller PCB. Inputs to the Finisher Controller PCB Finisher controller PCB Inlet sensor PI J J J PENT When the sensor detects paper,. Delivery sensor PI J J J- - - PDEL When the sensor detects paper,. Stapling tray sensor PI J J0A J9A- - - STPTY When the sensor detects paper,. Shutter open sensor PI J J JB- - - STOPN When the shutter opens,. Alignment plate home position sensor PI J J0A J9A- - - JOGHP When the alignment plate is at the home position,. Stapler shift home position sensor PI J J JA- - - STPHP When the stapler is at the home position,. Tray- home position sensor PI J J- - - TRYHP When the tray- is at the home position,. Figure -0 -

34 CHAPTER FINISHER UNIT BASIC OPERATION. Inputs to the Finisher Controller PCB Finisher controller PCB Delivery motor clock sensor PI0 J J0A J9A-9 - DELCLK - While the delivery motor is rotating, alternately between 0 and. Tray- paper sensor PI J J J- - FSTTRAY* - When paper is present on tray-, 0. Tray- paper sensor PI J J J- - When paper is present on SNDTRAY* - tray-, 0. Buffer path paper sensor PI J J- - BUFPASS - When paper is in the buffer path,. Joint sensor PI J- - - JA- - JOINT - When the finisher is joined with the host machine,. Door open sensor PI J J JB- - DROPN - When the front door is open, 0. Buffer path inlet paper sensor PI J J- - BUFENTR - When paper is present at the buffer path inlet,. Swing guide open sensor PI J J J- -0 SWGOPN -9 When the swing guide is open,. Figure -0 -

35 CHAPTER FINISHER UNIT BASIC OPERATION. Inputs to the Finisher Controller PCB Finisher controller PCB Swing motor clock sensor PI0 J J0B J9B- - - SWGCLK When the swing motor is rotating, alternately between 0 and. Tray- home position sensor PI J- - - J- - - TRYHP When the tray- is home position,. Height sensor PS J J J - J Height PWR Measures the distance between the sensor and the top of the stack on the tray. Door switch N. O. C. J- J- - MS Swing guide closed detecting switch N. O. C. - MS - J J J- - J- - +V +VMOVE DRSW +V SHIFT When the front door and the upper cover are closed,. Swing guide closed detecting switch N. O. MS C. - - J J- -9 +VSTPL SWGGCLD When the swing guide is closed,. Safety zone switch C. N. C. N. O. MS J- - - J VSHIFT TRAYSAF When the tray is at the delivery slot,. Shutter closed detecting switch N. C. N. O. MS C. J J J J- - - SHUTCLD When the shutter is closed,. Tray coming close detection switch N. C. N. O. MS9 C. J- - J- - J- TRYLMT VSHIFT When the tray- gets close to the tray-: 0 Figure -0 -

36 CHAPTER FINISHER UNIT BASIC OPERATION. Inputs to and Outputs from the Finisher Controller PCB Stapler unit Finisher controller PCB Staple edging sensor * When a staple is at the edge of the stapler, 0. Staple home position sensor * When the stapler is at the home position, 0. Cartridge switch * When a cartridge is present, 0. Staple switch * When staples are present in the cartridge, 0. * When the stapler is connected, 0. CONNECT Saddle stitcher controller PCB J00-9 J Communication line Host machine J J- Communication line JS Figure -0 -

37 CHAPTER FINISHER UNIT BASIC OPERATION. Outputs from the Finisher Controller PCB Finisher controller PCB Flapper solenoid SL J J0 - - JA- - +V FLPSL* When "0", the solenoid turns on. Buffer inlet solenoid SL J0 - JB-9-0 +V ENTSL* When "0", the solenoid turns on. Buffer outlet solenoid SL J09 - J- - +V EXITSL* When "0", the solenoid turns on. Paddle solenoid SL J J0B - -0 J9B- - +V PDLSL* When "0", the solenoid turns on. Escape solenoid SL J J0A - - J9A-0 - +V ESCPSL* When "0", the solenoid turns on. Belt escape solenoid SL J J JB- - +V BESCPSL* When "0", the solenoid turns on. First feed motor M J J J B* A* B A +V According to rotation direction/speed, changes between + and - in sequence. Delivery motor According to rotation direction/speed, changes between + and -. Alignment motor According to rotation direction/speed, changes between + and - in sequence. Figure -0 -

38 CHAPTER FINISHER UNIT BASIC OPERATION. Outputs from the Finisher Controller PCB Finisher controller PCB Stapler shift motor JA- According to rotation direction/speed, changes between + and - in sequence. Staple motor JA-,, According to rotation direction/speed, changes between + and -. Tray- lift motor Tray- lift motor Swing motor J J J J UPTRY-M-ON UPTRY-FG UPTRY-M-LOCK UPTRY-M-CW/CCW UPTRY-M-CLK LOWTRY-M-ON LOWTRY-FG LOWTRY-M-LOCK LOWTRY-M-CW/CCW LOWTRY-M-CLK J0- According to rotation direction/speed, changes between + and -. Second feed motor According to rotation direction/speed, changes between + and -. Inlet feed motor According to rotation direction/speed, changes between + and - in sequence. Figure -0-9

39 CHAPTER FINISHER UNIT BASIC OPERATION II. FEED/DRIVE SYSTEM A. Outline The finisher is designed to operate according to the commands from its host machine to deliver arriving copies to trays in the appropriate mode: simple stacking, job offset, stapling. See Figure -0 for a diagram of the three modes of delivery (four for the Saddle Stitch Finisher). Method of delivery Normal delivery Simple stacking Job offset Staple Front diagonal Rear -point Rear diagonal Saddle stitch delivery (Saddle Stitch Finisher only) -point Figure -0 Normal delivery tray Normal delivery tray To saddle stitcher unit (Saddle Stitch Finisher) Figure -0-0

40 CHAPTER FINISHER UNIT BASIC OPERATION. Normal Delivery a. Simple Stacking The finisher delivers copies directly to the tray. Tray Tray Copies Copies Delivery roller Feed roller Figure -0 Feed roller -

41 CHAPTER FINISHER UNIT BASIC OPERATION b. Job Offset The finisher forwards all copies of each sort job to the stapling tray. The first sort job on the stapling tray is delivered with a shift to the front of about 0 mm, and the second sort job is delivered without being shifted. Whether the first copy or the last copy of a sort job should be shifted is determined by the host machine. Tray Each sort job is stacked alternately. Figure -0 Swing guide Stapling tray Stopper Delivery roller Figure -0 Feed roller Results of Delivering Sets Copies handled by job offset Direction of delivery Figure -0 -

42 CHAPTER FINISHER UNIT BASIC OPERATION c. Stapling The finisher stacks copies arriving from its host machine on the stapling tray. Then, it staples and delivers the copies to the appropriate tray. Tray Copies Staple Swing guide Stapling tray Delivery roller Stopper Feed roller Figure -0 Paper width/ Front diagonal stapling -point stapling Rear diagonal stapling Rear -point stapling Figure -0 -

43 CHAPTER FINISHER UNIT BASIC OPERATION. Saddle Stitch Delivery (Saddle Stitch Finisher) A copy arriving in the finisher from the host machine is routed to the saddle stitcher by the paper deflecting plate. The saddle stitcher executes stitching and saddling operations on the copy and then delivers it to the saddle stitcher tray. For discussions of stacks in the saddle stitcher, see Chapter. To saddle stitcher Figure -09 -

44 CHAPTER FINISHER UNIT BASIC OPERATION B. Type of Delivery Paths The finisher has three different paper paths for delivery, each selected to suit paper size and delivery mode.. Straight Path When stacking copies shown in Table -0, the copies pass under the buffer roller. Copy size Typical copy examples Length or width mm or less A-R, ST-R, thick paper Table -0 Delivery roller Buffer roller Figure -0. Buffer Paper Path When stacking copies shown in Table -0, the copies pass over the buffer roller, increasing the distance between copies. Copy size Typical copy examples Length and width mm or more A, B, A, A-R, B, B-R, LD, LG, LT, LT-R, (excluding transparencies and thick stock) Table -0 Buffer roller Delivery roller Feed roller Figure - -

45 CHAPTER FINISHER UNIT BASIC OPERATION. Buffer Paper Path This is the paper path when copy sizes shown in Table -0 are stacked. A maximum of three copies (three originals or more in the staple mode) are wrapped round the buffer roller, during which job offset and stapling are performed on the stapling tray. Copy size Typical copy examples Length to mm, and width to 9mm A, B, LT, (excluding transparencies and thick stock) Table -0 The following shows paper delivery operation in the case of three originals in the staple mode. ) The first copy is moved in the direction of the buffer roller. Buffer roller First copy Figure - ) The first copy wraps around the buffer roller and, at the same time, the second copy arrives from the host machine. First copy Second copy Figure - -

46 CHAPTER FINISHER UNIT BASIC OPERATION ) The second copy is laid over the first copy and, at the same time, the third copy arrives from the host machine. First copy Second copy Third copy Figure - ) The first, second and third copies are simultaneously pulled into the stapling tray. Second copy Third copy First copy Figure - Cauiton: The third copy as explained here is moved through buffer paper path. This fact is omitted from the discussion to avoid interrupting the sequence of operations. -

47 CHAPTER FINISHER UNIT BASIC OPERATION C. Feeding and Delivering. Outline The finisher moves copies arriving from the host machine to the delivery tray, stapling tray, or the saddle stitcher unit (Saddle Stitch Finisher) according to the mode of delivery. On the stapling tray, the copies are subjected to job offset or stapling as instructed by the host machine. The first feed motor (M), second feed motor (M) and inlet feed motor (M9) are stepping motors, and delivery motor (M) is a DC motor. These motors are controlled by the microprocessor (CPU) on the finisher controller PCB, and rotate either clockwise or counterclockwise. The paper paths are equipped with the following four sensors for detection of paper (arrival, passage): Inlet sensor (PI) Delivery sensor (PI) Stapling tray sensor (PI) Buffer path paper sensor (PI) In addition, each delivery tray is equipped with a sensor designed to detect the presence/absence of paper on it. Tray- paper sensor (PI) Tray- tray paper sensor (PI) If a copy fails to reach or move past each sensor within a specific period of time, the finisher controller PCB identifies the condition as a jam, and stops the ongoing operation, and at the same time, informs the host machine of the condition. When all doors are closed after the paper jam is removed, the buffer path inlet paper sensor (PI) checks whether or not copies are being detected in addition to the above four sensors (inlet sensor, delivery sensor, stapling tray sensor and buffer path paper sensor). If the sensors detect a copy, the finisher unit judges that paper jams have not completely been removed, and sends the paper jam removal signal to the host machine again. -

48 CHAPTER FINISHER UNIT BASIC OPERATION Finisher controller PCB M M M9 SL Tray- lift motor drive signal Escape solenoid drive signal ESCPSL Alignment motor drive signal Delivery motor drive signal Delivery motor clock signal DELCLK Swing motor drive signal Swing motor clock signal SWGCLK Tray- lift motor drive signal Paddle solenoid drive signal PDLSL Second feed motor drive signal First feed motor drive signal Inlet feed motor drive signal Buffer outlet solenoid drive signal EXITSL Buffer inlet solenoid drive signal EXTSL Flapper solenoid drive signal FLPSL Belt escape solenoid drive signal BESCPSL Stapler motor drive signal Stapler shift motor drive signal M PI0 PI0 M M SL SL SL SL M M SL M M0 Figure - -9

49 CHAPTER FINISHER UNIT BASIC OPERATION Finisher controller PCB Tray- paper detection signal SNDTRAY Tray- paper detection signal FSTTRAY Stapling tray paper detection signal STPTY Buffer path paper detection signal BUFPASS Delivery detection signal PDEL Buffer path inlet paper detection signal BUFENTR Inlet paper detection signal PENT PI PI PI PI PI PI PI Figure - -0

50 CHAPTER FINISHER UNIT BASIC OPERATION D. Job Offset. Outline In the job offset mode, sort jobs and entire copy groups are shifted to the front for delivery to the tray, and other copies are delivered to the tray without a shift. The copies are shifted by the alignment plate. The alignment plate is checked by the alignment plate home position sensor (PI) to find out whether it is at the home position. The finisher controller PCB drives the alignment motor (M) at power-on to return the alignment plate to its home position. The finisher controller PCB stops the delivery motor (M) when the trailing edge of the copy has moved past the feed roller. Then, the finisher controller PCB rotates the delivery motor counterclockwise, and drives the swing motor (M). As a result, the drive of the delivery motor is transmitted to the swing guide to move up the guide. When the swing guide open sensor (PI) detects the swing guide, the delivery motor stops, and the swing guide is held at the up position. When the swing guide has moved up, the feed belts attached to the feed roller move the copy to the stapling tray. The presence of paper on the stapling tray is monitored by the stapling tray sensor (PI). (The first sheet is fed to the stapling tray while the swing guide is moving up.) The finisher controller PCB drives the alignment motor (M) in advance, and keeps the alignment plate in wait at a point 0 mm behind the trailing edge of a sheet. Whenever one sheet is moved to the stapling tray, each sheet is aligned, and when the fifth or last sheet in a sort job/group is fed to the stapling tray, the escape solenoid (SL) moves the guide plate away and under the stapling tray. From then on, the alignment motor shifts the sheets to the front by 0 mm. When the copy has been shifted, the finisher controller PCB rotates the alignment motor counterclockwise to move the alignment plate to a point 0 mm behind the trailing edge of the sheet. This alignment operation is repeated until alignment of the fifth or last sheet in a sort job is completed. At this time, the swing guide is moved down and is closed, and the delivery motor rotates clockwise to deliver the sheet. -

51 CHAPTER FINISHER UNIT BASIC OPERATION Alignment plate Guide plate Alignment plate home position sensor (PI) Paper Alignment motor (M) Escape solenoid (SL) Sequence of Operation (job offset) Figure - Start signal Host machine delivery signal Inlet sensor (PI) Delivery sensor (PI) Inlet feed motor (M9) First feed motor (M) Second feed motor (M) Delivery motor (M) Staple tray sensor (PI) Alignment motor (M) Alignment plate home position sensor (PI) Swing motor (M) Swing guide open sensor (PI) Swing guide closed detecting switch (MS) Escape solenoid (SL) : Motor CW rotation : Motor CCW rotation Figure -9 -

52 CHAPTER FINISHER UNIT BASIC OPERATION. Flow of Job Offset Operations ) The swing guide moves up and, at the same time, the feed belts move the sheet to the stapling tray. Swing guide Offset sheet Feed roller Tray-/- Delivery roller Stapling tray Figure -0 Stopper Knurled belts ) The alignment plate shifts the sheet to the front. Existing stack Alignment plate Offset sheet Figure - ) The swing guide moves down and, at the same time, the delivery roller delivers the sheet. Offset sheet Swing guide Feed roller Tray-/- Delivery roller Stapling tray Stopper Knurled belts Figure - -

53 CHAPTER FINISHER UNIT BASIC OPERATION E. Staple Operation. Outline The stapler unit staples a stack of as many sheets as specified. The stapling position differs according to the selected staple mode and paper size. The stapler unit is checked by the stapler shift home position sensor (PI) to find out whether it is at the home position. When starting operation after power-on, the finisher controller PCB drives the stapler shift motor (M) to return the stapler unit to the home position. If the stapler is already at the home position, it is kept as it is in wait. Stapler shift motor (M) Sheets Stapler Stapler shift home position sensor (PI) Figure - -

54 CHAPTER FINISHER UNIT BASIC OPERATION Paper width/ Front diagonal stapling -point stapling Rear diagonal stapling Rear -point stapling Figure - -

55 CHAPTER FINISHER UNIT BASIC OPERATION. First Sheet The finisher controller PCB stops the delivery motor (M) as soon as the trailing edge of the first sheet has moved past the feed roller. Then, it rotates the delivery motor clockwise to switch the gear drive to the swing motor (M), causing the swing guide to move up. When the swing guide open sensor (PI) finds the swing guide at the up position, the swing motor stops, maintaining the swing guide at the up position. When the swing guide has moved up, the knurled belts of the feed roller move the sheet to the stapling tray. (The first sheet is fed to the stapling tray while the swing guide is moving up.) The presence of paper on the stapling tray is detected by the stapling tray sensor (PI). The finisher controller PCB drives the alignment motor (M) when the stapling tray paper sensor has detected paper to put sheets in order. The alignment plate is kept in wait in advance at a point 0 mm behind the trailing edge of the paper. The swing guide is kept in wait at the up position until the last sheet is output onto the stapling tray. Swing guide First sheet Feed roller Knurled belts Tray-/- Delivery roller Stapling tray Stapler Figure - -

56 CHAPTER FINISHER UNIT BASIC OPERATION Swing guide Swing guide open sensor (PI) Swing guide closed detecting switch, (MS/MS) Delivery roller Swing motor clock sensor (PI0) Delivery motor clock sensor (PI0) Swing motor (M) Delivery motor (M) Figure - -

57 CHAPTER FINISHER UNIT BASIC OPERATION. Second and Subsequent Sheets The finisher controller PCB turns on the belt escape solenoid (SL) before the trailing edge of the second and subsequent sheets have moved past the feed roller to make the knurled belt escape. This operation is performed to reduce the time it takes for the trailing edge of the paper to fall on the stapling tray, and to improve the product duty. The finisher controller PCB turns on the paddle solenoid (SL) as soon as the trailing edge of the second and subsequent sheets have moved past the feed roller, causing the drive of the second feed motor (M) to rotate the paddle. The sheets are pushed by the paddle and moved to the stapling tray. Almost simultaneously with the trailing edge of the sheet falling into the stapling tray, the belt escape solenoid turns off to return the knurled belts that were in the escape position to its original position, and feed the sheet onto the stapling tray. When the sheet has been output onto the stapling tray, the finisher controller PCB rotates the alignment motor (M) to put the sheets in order. Swing guide Second and subsequent sheets Paddles Feed roller Knurled belts Tray-/- Delivery roller SL Belt escape solenoid Stapling tray Stapler Figure - -

58 CHAPTER FINISHER UNIT BASIC OPERATION Knurled belts Escape direction Belt escape solenoid (SL) Figure - Paddles Paddle solenoid (SL) Paddles Second and subsequent sheets First sheet Stapler M Second feed motor Stopper Figure -9-9

59 CHAPTER FINISHER UNIT BASIC OPERATION. Last Sheet When the last sheet has been put in order, the finisher controller PCB turns on the alignment motor (M) to move the alignment plate to the alignment position (to butt the plate against the stack). Then, the finisher controller PCB rotates the swing motor (M) counterclockwise to move down the swing guide. The finisher controller PCB moves the stapler according to the staple mode for stapling. From then on, it rotates the delivery motor (M) clockwise to deliver the stack to the tray. Swing guide Sheets Feed roller Knurled belts Tray-/- Delivery roller Stapling tray Stapler Figure -0-0

60 CHAPTER FINISHER UNIT BASIC OPERATION Swing guide Delivery roller Swing motor (M) Delivery motor (M) Figure - -

61 CHAPTER FINISHER UNIT BASIC OPERATION F. Stapler Unit Stapling is executed by the staple motor (M). A single rotation of the cam by the motor results in one stapling operation. The cam is checked by the staple home position sensor (PI) to find out whether it is at the home position. The stapler motor is controlled by the microprocessor (IC) on the finisher controller so that it is rotated clockwise or counterclockwise. When the stapling home position sensor is off, the finisher controller PCB rotates the stapler motor clockwise until the sensor turns on so as to return the stapling cam to its initial state. The presence/absence of the staple cartridge is detected by the staple switch (MS). The presence/absence of staples inside the staple cartridge is detected by the staple detecting switch (MS9). The staple edge sensor (PI) is used to find out whether a staple has been edged out to the end of the cartridge. The finisher controller PCB does not drive the staple motor (M) unless the swing guide closed detecting switch (MS) is on (i.e., the swing guide is closed). This is to protect against injuries that could occur when a finger is stuck inside the stapler. -

62 CHAPTER FINISHER UNIT BASIC OPERATION Figure - Staple edge detection signal Staple motor drive signal M Stapling home position detection signal Cartridge detection signal Staple detection signal Finisher controller PCB Figure - -

63 CHAPTER FINISHER UNIT BASIC OPERATION Start signal Host machine delivery signal Inlet sensor (PI) First sheet Stacking Second sheet Stapling Delivery Delivery sensor (PI) Inlet feed motor (M9) First feed motor (M) Second feed motor (M) Delivery motor (M) Stapling tray sensor (PI) Alignment motor (M) Alignment guide home position sensor (PI) Swing guide open sensor (PI) Swing guide closed detecting switch (MS) Paddle solenoid (SL) Belt escape solenoid (SL) Staple motor (M) Staple home position sensor (PI) Stapler shift motor (M) : Motor CW rotation : Motor CCW rotation Figure - -

64 CHAPTER FINISHER UNIT BASIC OPERATION. Shifting the Stapler Unit The stapler unit is moved by the stapler shift motor (M). Its home position is detected by the stapler shift home position sensor (PI). When the start signal arrives from the host machine, the stapler moves to the center of its movement range. This movement occurs regardless of the selected mode of delivery, as no specific mode is recognized at this point in time. When the command for stapling arrives from the host machine after the first sheet has reached the host machine pre-registration sensor, the stapler moves to the staple wait position to suit the appropriate stapling position and paper size. See Figures - and later for an idea of the wait position according to the stapling mode. a. Front Diagonal Stapling The position is the same as the stapling position. Stopper Stapling tray delivery direction Stopper Guide plate Figure - Stapler -

65 CHAPTER FINISHER UNIT BASIC OPERATION b. Rear -Point Stapling The stapler is kept in wait at the center position. The stapler is moved to and from the stapling position for each stapling operation. Stopper Stapling position Wait position Stapling tray delivery direction Stopper Stapler Guide plate Figure - c. Rear Diagonal Stapling For A, LT and B sizes, the stapler is kept in wait toward the rear away from the stapling position. The stapler is moved to and from the stapling position for each stapling operation. Stapler Wait position Stapling position Stopper Stapling tray delivery direction Stopper Guide plate Figure - -

66 CHAPTER FINISHER UNIT BASIC OPERATION d. -Point Stapling The stapler is kept in wait at the center of the paper. Stapling occurs at two points, first at the rear and then at the front. Stopper Stapling position Wait position Stapler Stapling tray delivery direction Stapling position Stopper Guide plate Figure - -

67 CHAPTER FINISHER UNIT BASIC OPERATION G. Tray Operation The finisher has two delivery trays. The upper tray is called tray- and lower tray is called tray-. The tray- and tray- move up and down independently. Tray- is moved up and down by the tray- lift motor (M), and tray- by the tray- lift motor (M0). The finisher controller PCB switches the motor driving direction of the tray lift motors (the motor driver PCB embedded) to control the vertical movement of the trays. When the power is turned ON, the finisher controller PCB drives the tray lift motors (M/M0) to return the trays to their home positions. If the tray is already at the home position, it is moved away from the home position once, and then returned to that position. If both tray- and tray- are at the home position, the above operation is performed for the tray- and - in this order. The tray position is detected by the following operation: The finisher controller PCB counts the clock signal outputted from the tray lift motor (the motor driver PCB embedded) as soon as the tray starts to move. The finisher controller PCB moves up and down the tray selected by the host machine so that it is positioned at the delivery slot. The lower limit of the tray- is detected by the tray coming close detecting switch (MS 9). The finisher controller PCB stops the drive (down) of the tray- lift motor (M) as soon as the tray coming close detection switch (MS9) turns on. The height of the stack on the tray is identified by the height sensor (PS), which measures its distance from the top of the stack. The tray is moved down when the distance between the top of the stack on the tray and the sensor becomes less than the specific measurement. The finisher controller PCB cuts off the +V power of the tray lift motors (M/M0) as soon as the safety zone switch (MS) turns ON while the shutter and the swing guide are open, stopping the operation of the finisher. -