B793 Service Manual
Contents
1. Y ps EN rmi Remove the rear cover 1 2 Disconnect all connectors and release harness A for the staple folder unit amp x 1 E x 3 3 Openthe front cover SM B793 4 Pull out and remove staple folder unit B 2 1 3 2 FOLDER UNIT 1 Remove the staple folder unit 2 Remove the knobs A x 1 each 3 Disconnect the connectors 4 Remove the folder unit B x 4 SM 13 Folder B793 N O aa i Nn Folder 1 3 3 FOLDER UNIT EXIT SENSOR C Remove the folder unit Remove the folder unit upper cover A x 1 Remove the lower clamp roller unit B x 4 Remove the folder unit exit sensor C F x 1 E x 1 B793 14 SM Folder 1 3 4 FOLDER UNIT ENTRANCE SENSOR 3 1 p 255 3x o Ow Open the front cover Pull out the staple folder unit Remove the exit cover A 2 Remove the entrance sensor B 2 x 1 EP x 1 9 STAPLER UNIT Remove the rear cover 2 Disconnect the connector 1 and release the harness 09 x 2 2 3 Remove two screws 3 SM 15 B793 Folder E 5 Disconnect the connectors and release the harness 4 connectors 5 1 clamp 6 B793 16 SM Folder S Ka LL2. 53 22192 WP OLD FRO WEE RS itenim 54 59 2 121 OVERVIEW OF OPERATION sninn EN 55 2 12 2 PAPER POSITION 57 2 12 9 lt 58 2 12 4 PUNCH SELECTION AND 58 2 129 PUNCH HOPPER MEGHANISII 59 793 SM Read This First Safety and Symbols Replacement Procedure Safety A CAUTION off the main power switch and unplug the machine before beginning any of the replacement procedures in this manual When taking apart the bridge unit first take the unit out of the copier Symbols Used in this Manual This manual uses the following symbols See or Refer to F Screws EF Connector e Clip ring E ring Covers 1 REPLACEMENT AND ADJUSTMENT 1 1 COVERS 1 1 1 FRONT INNER REAR COVERS qe We gt e a NT Ox N O Ow 1 Remove the front cover F x 1 2 Remove the inner cover B 2 SM 1 B793 Covers C 3 Remove the rear cover C P x 2 1 1 2 UPPER COVERS
3. Remove the upper cover A 2 9x1 1 2 Remove the proof tray B 2 4 SM B793 Covers C JOUSIUI4 9 6 9 3 Remove upper left cover B793 SM 1 2 MAIN BODY 1 2 1 POSITIONING ROLLER 1 Open front cover 2 Remove the positioning roller A 09 x 1 1 2 2 SHIFT TRAY POSITION SENSOR UPPER LIMIT SWITCH 1 Remove the following items Front Cover Inner Cover Rear Cover Proof Tray Upper Left Cover B793 4 SM 2 Remove the lower guide unit A x 4 EP x 2 3 Remove the shift tray position sensor B EF x 1 4 Remove the upper limit switch C x 2 Pull it out from the assembly 1 2 3 PROOF TRAY EXIT FULL SENSOR 1 Remove the front cover rear cover and proof tray 2 Open the upper cover B SM 5 Main Body B793 co o N T le Nn 3 Remove the vertical transport guide A x 4 4 Remove the exit sensor B EP x 1 5 Remove the tray full sensor C EF x 1 1 2 4 FINISHER ENTRANCE SENSOR 1 Remove the finisher entrance sensor with bracket A x 1 2 Remove the finisher entrance sensor B E x 1 B793 6 SM 1 2 5 SHIFT TRAY EXIT SENSOR im NT Ox N e 1 Remov
4. T Remove 2 screws 8 SM 17 B793 Folder POPPE 9 Remove the guide 10 2 screws B793 18 SM 11 Remove the screw 12 that holds front of the guide plate 13 SM 19 Folder B793 Or m o S Ka LL Folder B793 Remove the rear side screw through the hole in the stay 20 SM 14 Remove the staple folding unit 15 3 screws 2 connectors SM 21 Folder B793 S Ka LL Folder 15 Remove the staple cartridge 16 16 Remove the stapler unit cover 17 17 Remove the stapler drive unit 18 B793 22 SM Folder Reassembly 1 Mount the stapler drive unit 1 S Ka LL 2 Mount the staple folder unit 2 Do not tighten the screws 3 at this time SM 23 B793 Folder 4 Secure the special tool 5 with the knob 6 B793 24 SM 5 Tighten screws 7 for the stapler folder unit 6 Reassemble the machine SM 25 Folder B793 Or m o S Ka LL Others 1 4 OTHERS 1 4 1 MAIN BOARD N 1 Remove the rear cover 2 Remove the main board A x 5 B793 26 SM DIP Switches 1 5 DIP SWITCHES oW 100 Adjust the staple position for booklet mode ON 0 3 mm ON 0 6 mm ON
5. Retraction Motor 793 Booklet Finisher for paper size Motor Punches the holes in the paper Paper Position 52 Controls side to side movement of the paper position sensor in the sensor punch unit Slide Motor Motor Punch Movement 57 Moves the punch from side to side Solenoids Switches Upper Limit 4 Detects when the shift tray is at the highest possible position Switch and cuts power to the shift tray motor SM 37 B793 Component Layout Front Door Safety Switch Cuts dc power when the front door is opened Others Staple Driver Unit Pushes the staples into the paper Staple Folder Unit Folds the ends of the staples after stapling B793 38 SM Junction Gates 2 2 JUNCTION GATES Two junction gates control the path of paper Each junction gate is controlled by a solenoid Junction gate operation is summarized in the following table Paper Path Proof Tray Gate Solenoid Staple Tray Ox No 2 mos Ow SM 39 B793 Proof Tray 2 3 PROOF TRAY G C A ome SOMMER E X AT E Proof Tray Junction Gate Control A Proof Tray Gate Solenoid Roller Drive Proof Tray Exit Roller B Proof Tray Transport Roller C Controlled by the Upper Transport Motor Entrance Roller D Transport Roller E Control
6. 28 Detects when the stopper S mechanism is at home position Stack Feed Out HP 29 Detects when the stack feed out belt is at home position Sensor otaple Unit 30 Detects when the side to side motion of the stapler unit is at home HP Sensor position id ix 34 Detects when the jogger unit is at home position ensor Staple Tray Paper sensor Detects when paper is fed into the stapler tray Stops side to side movement of the stapler until stopper S and the stack feed out pawl mechanisms are at home position to prevent damage to the machine 1 Detects the folded edge of the stack as it feeds out from the nip of the fold rollers so the fold feeds back into the nip 2 when the folded booklet finally emerges from the nip of the fold rollers detects the leading and trailing edge of the booklet to make sure that it feeds out correctly Fold Unit Exit Sensor B793 Booklet Finisher Lower Clamp Roller HP Sensor C2 Detects when the lower clamp roller is at home position Fold Unit Entrance Sensor Detects 1 the leading edge of the stack during booklet stapling and 2 also used to signal an alarm if a paper is detected at the entrance of the fold unit when the copier is turned on iN Bottom Fence HP Sensor Detects when the bottom fence of the booklet folding mechanism is at home position iN NO Along with the fold plate HP sensor this sensor controls the movement of the fold plate The
7. 12 5 6 1 Proof Tray Exit Sensor 2 Exit Guide Plate Motor 3 Shift Tray Exit Sensor 4 Upper Limit Switch 5 6 7 8 9 Shift Tray Position Sensor Rear Booklet Tray Full Sensor Front Booklet Tray Full Sensor Proof Tray Full Sensor Exit Guide Plate HP Sensor 10 Entrance Sensor 11 Front Door Safety Switch 12 Staple Tray Exit Sensor B793 30 SM 13 14 15 16 17 18 13 14 15 16 17 18 19 20 21 22 23 24 SM 22 23 24 Proof Tray Gate Solenoid Lower Transport Motor Entrance Motor Positioning Roller Solenoid Main Board Shift Tray Motor Lower Limit Sensor Upper Cover Sensor Staple Tray Gate Solenoid Upper Transport Motor Shift Motor Shift Motor HP Sensor 31 Component Layout B793 m T 9 Nn Component Layout 38 39 40 41 42 43 44 45 46 47 44 45 Fold Unit Exit Sensor Lower Clamp Roller HP Sensor Lower Retraction Motor Fold Unit Entrance Sensor Bottom Fence HP Sensor Fold Cam HP Sensor Fold Roller Motor Fold Plate HP Sensor Fold Plate Motor Bottom Fence Lift Motor B793 32 SM 48 49 50 52 53 54 55 56 of SM 48 Punch Motor Punch Encoder Sensor Punch HP Sensor Punch Board Paper Position Sensor Slide Motor Paper Position Slide HP Sensor Paper Position Sensor Punch Movement HP Sensor
8. stops and the lower clamp roller feeds the stack down The lower clamp roller is released just before the leading edge of the stack reaches the bottom fence B this fence consists of two pawls that catch the paper The bottom fence moves the stack to the folding position The fold roller motor C turns the lower clamp roller The lower retracting motor D moves the lower clamp roller against and away from the stack The lower clamp roller HP sensor E detects when the lower clamp roller is moved to the home position The bottom fence lift motor F moves the bottom fence up and down The bottom fence HP sensor G detects when the bottom fence is at home position B793 52 SM Folder 2 11 FOLDER 2 11 1 OVERVIEW The fold plate pushes the stack into the nip between the fold rollers The fold rollers feed out the stack then reverse to feed it back in again Then the fold rollers feed the stack out of the folder to the booklet tray 2 11 2 FOLD PLATE C D E Ox 2 Moc Ow B A A Bottom Fence Stack Stoppers Catches the stack after it is released by the clamp rollers B Fold Plate Motor Drives timing belt and gears that move the fold plate C Fold Plate Cam Controls the movement of the fold plate to the left into the nip of the fold rollers and right toward the fold plate home position D Fold Plate HP Sensor Controls operation of the fold plate mo
9. the skew of each sheet by adjusting the amount of time the finisher entrance roller remains off while the exit roller of the machine remains on For more see Section 5 Service Tables SP6131 This SP determines whether the finisher entrance roller stops to correct skew when paper enters the finisher You can use this SP to disable the skew correction For more see Section 5 Service Tables SM 55 B793 eo N co San X 2 ot Ow Punch Unit Position Correction These operations skew correction before punching and punch unit position correction increase the accuracy of the punch alignment The trailing edge of the sheet passes the finisher entrance sensor The paper position slide unit moves the paper position sensor B forward to the edge of the paper The paper position sensor detects the position of the paper edge and sends this information to the punch unit board The machine uses the detected position of the paper edge to calculate the correct position for punching The upper transport motor switches on and rotates the feed rollers C the prescribed distance to put the paper under the punch unit D e Using the result of the position calculation the punch unit control board moves the punch unit D to the adjusted punch position The paper position slide unit and its paper sensor move back to the paper position slide home position sensor E and the punch
10. 1 2 mm 4 Direction OFF Towards the trailing edge ON Towards the leading edge oW 101 Adjust the fold position 4 Direction OFF Towards the trailing edge ON Towards the leading edge oW 102 Move the tray position OFF gt ON gt OFF 6 5 Ox 2 c Turn the switch from off to on then turn it to off again Then the tray moves down to the shipping position E Mote A After you change any of these dip switch settings open and close the finisher cover to activate the new setting It is not necessary to turn the main power off on SM 27 B793 Component Layout 2 DETAILED SECTION DESCRIPTIONS 2 1 COMPONENT LAYOUT 2 1 1 MECHANICAL COMPONENT LAYOUT NO 1 Proof Tray 4 Stack Feed Out Belt 7 Proof Tray Exit Roller 10 Staple Tray Junction Gate 13 2nd Clamp Roller B793 NI 2 Shift Tray 5 Staple Unit 8 Proof Tray Junction Gate 11 Positioning Roller 14 Folder Plate 28 8 15 3 Exit Guide Plate 6 Booklet Tray 9 Punch Unit 12 1st Clamp Roller 15 Folder Roller SM Drive Layout 1 Upper Transport Motor 2 Entrance Motor 3 Lower Transport Motor 4 Fold Plate Motor 5 Fold Roller Motor 6 Stack Feed out Motor SM 29 Component Layout B793 eo eo m 85 x o c Ow Component Layout 2 1 2 ELECTRICAL COMPONENT LAYOUT 2 9 3 10 11 4
11. AL OR SHORTER 2 Ox 2 mos na C At the start of the set the upper retraction motor A turns on and stopper S B moves down into position to catch the paper D The upper retraction motor also moves the upper clamp roller C into contact with the stack SM 49 B793 otacking for Booklet Stapling When the stack is complete stopper S moves away D and the machine feeds the stack to the correct position for stapling To do this the upper clamp roller motor E rotates the upper clamp roller 2 9 3 LONGER THAN 8 5 X 14 INCHES B At the start of the set the stapler moves to the center position At this position a bracket A on the stapler unit pushes stopper L B The pawl C on the stopper L assembly then moves into position to catch the paper The upper clamp roller holds the stack see the B793 50 SM otacking for Booklet Stapling previous section When the stack is complete the stapler moves to the rear side position and stopper L moves away The machine feeds the stack to the correct position for stapling SM 51 B793 Or N Oo mo Nn Moving the Stack to the Folding Position 2 10 MOVING THE STACK TO THE FOLDING POSITION C E First the upper clamp roller feeds stack down after the stack has been stapled When the lower clamp roller A catches the stack the upper clamp roller
12. BOOKLET FINISHER 793 Page Date AddediUpdatedNew Non 2 4 BOOKLET FINISHER 793 TABLE OF CONTENTS 1 REPLACEMENT AND ADJUSTMENT 1 Te COV BIR S n 1 1 1 1 FRONT INNER REAR COVERS 1 TEZ red oo lp OL al co tere ea ee ere tree 2 KZ MAIN BODY a n 4 12 IROSDPIONING ROLLE uias 4 1 2 2 SHIFT TRAY POSITION SENSOR UPPER LIMIT SWITCH 4 1 2 9 PROOF TRAY EXIT FULL SENSOR 5 1 2 4 FINISHER ENTRANCE SENSOR 6 1 2 9 SRIFT TRAY EXIT SENSOR nce P XM URSE dU RURSUS UR NUR d 7 1 2 6 STAPLE TRAY PAPER SENSOR 8 1 2 SORMET TRAY MOTOR fato 8 1 2 9 s NES EU e ww 9 1 2 9 UPPER TRANSPORT MO TOR ubt erbe iuo vehi n uias 9 1 2 10 LOWER TRANSPORT MOTOR eee 10 11 E ET IRE 12 1 2 12 13352 FOLDER UNIT 2 13 POLDER UNM IST SENSOR sets tatu 14 1 3 4 FOLDER UNIT ENTRANCE eene 15 deos S
13. Punch Hopper Full Sensor Punch Movement Motor 33 55 56 5 Component Layout B793 eo N m San X 2 M Component Layout Electrical Component Descriptions Boards Main Board Controls the finisher Punch Board Controls the punch unit Sensors Proof Tray Exit Sensor Detects paper when it is fed out to the proof tray shift Tray Exit Sensor Detects paper when it is fed out to the shift tray Shift Tray Position 5 Detects when the shift tray is the correct height to receive paper Sensor Tray Full booklet tray is full Rear Booklet One of two sensors that the machine uses to determine when Sensor Tray Full booklet tray is full sensor Proof Tray Full Sensor g Detects when the proof tray is full Front Booklet One of two sensors that the machine uses to determine when the Exit Guide Plate HP Detects when the exit guide plate is at home position sensor Entrance Detects when paper comes into the finisher ensor otaple Tray Exit Secor Detects paper leaving the bottom of the stapler Lower Limit Detects when the shift tray has moved to its lowest possible position 19 sensor the shift tray is full Upper Cover 20 Detects when the upper cover is open Sensor Shift Motor 24 Detects when the side to side motion of shift roller is at home HP Sensor position B793 34 SM Component Layout otopper S
14. TAPLER UNI stis ei EORR RU RU Rh e 15 26 MAIN BOARD M RN 26 Too IP 27 2 DETAILED SECTION DESCRIPTIONS 28 25 OMPONINT EAM T o p ne et eh ee rr 28 2 1 1 MECHANICAL COMPONENT 28 2 1 2 ELECTRICAL COMPONENT LAYOUT eee 30 Z2 JUNGTIONXSATESus mata tex nU DIE 39 SM i B793 TISSU Geen rene ter a eee ee 40 ZAMAN 41 2441 pet em 41 242 SIDE TO SIDE MOTION 42 2 9 BOOKLET Dp V atc 43 ZO NOG Ge SUI E 46 2 4 EAT GUIDE PLATE PAPER FEED OUT scssssisscesrctescisteesacieseiencaviecencentcen 47 2 8 STAPLER UNIT 48 295 49 2 9 1 OVERVIEW 5 49 292 IA LEGAL OR SHORTER adt 49 29 9 LONGER THAN 9 5 X T4 INCHES 50 2 10 MOVING THE STACK TO THE FOLDING POSITION 52 Ze FOLDER T DT 53 ZANT QVER ix 53 2112 FOLD PLATE
15. actuator mounted on the end of the roller that drives the folder plate forward and back makes three full rotations i e the actuator passes the sensor gap twice and stops the 3rd rotation and reverses This accounts for the left and right movement of the fold plate Fold Cam HP Sensor iN C2 Along with the fold plate HP sensor this sensor controls the movement of the fold plate The fold plate has arrived at the home position when the edge of the plate enters the gap of this sensor Fold Plate HP Sensor iN Ql Punch Encoder Sensor Controls the timing for activating the punches to punch holes in the paper at the correct position iN CO 6 OO gt Co N 5 35 793 Component Layout Punch HP S Detects when the hole punch firing mechanism is at home position ensor Slide HP punch unit is at home position Paper Position 53 Detects when the mechanism that measures the paper position in the sensor Position the punch holes raper 54 Detects the side edge of the paper to tell the machine where to put Sensor Punch Movement HP Sensor Detects when the side to side motion of the punch unit is at home position Detects when the punch hopper is full Also checks if the hopper is Hopper Full installed correctly Sensor Exit Guide Controls the exit guide plate mechanism Plate Motor N Controls the positioning roller and other rollers in the finisher see Transport 14 Dr
16. e front cover and upper left cover 2 Remove the link A G9 x 1 C 3 Remove the exit guide unit B 4 Remove the sensor C x 1 SM 7 793 1 2 6 STAPLE TRAY PAPER SENSOR 1 Open front cover 2 Pull out the staple fold unit 3 Remove the staple tray paper sensor A E x 1 1 2 7 SHIFT TRAY MOTOR 1 Remove the rear cover 2 Open the front cover and then pull out the staple fold unit B793 8 SM 3 Remove two gears A B 4 Remove the shift tray motor C 2 x 2 EF x 1 1 2 8 ENTRANCE MOTOR NT Ox N O Ow 1 Remove the rear cover 2 Release the belt tension A 3 Remove the entrance motor B F x 2 9 x 1 1 2 9 UPPER TRANSPORT MOTOR B 1 Remove the rear cover SM 9 B793 2 Release the belt tension A 3 Remove the upper transport motor B 2 x 2 EF x 1 1 2 10 LOWER TRANSPORT MOTOR A B 1 Remove the rear cover 2 Release the belt tension A 3 Remove the lower transport motor B F x 2 EP x 1 B793 10 SM 1 2 11 SHIFT MOTOR N O aa 1 Remove the rear cover 2 Remove the shift motor with bracket A x 1 P x 4 3 Remove the shift motor B x 1 Nn SM 11 B793 Folder 1 3 FOLDER 1 3 1 STAPLE FOLDER UNIT
17. e start of the job the stapler moves to the position where the stapler will be inserted In booklet mode at the start of a job the stapler moves to a starting position that depends on the paper size as follows 8 5 x 14 inches or shorter Rear side staple position Longer than 8 5 x 14 inches Center position When the stapler is at the center position bracket E releases stopper L which catches the bottom edge of the paper for booklet stapling with longer paper sizes This will be described in a later section If the stapler safety sensor D detects the stapler unit at its initialization the stapler unit stops moving until the stack feed out belt pawl and stopper S are at home position If the stapler unit does not stop it could collide with the pawl and or the stopper B793 48 SM otacking for Booklet Stapling 2 9 STACKING FOR BOOKLET STAPLING 2 9 1 OVERVIEW There are two stoppers near the stapler unit These stoppers hold the stack of paper in the correct position during stacking The stoppers are called stopper S and stopper L Stopper S is used for legal size paper or shorter than 8 5 x 14 inches Stopper L is used for paper that is longer than 8 5 x 14 inches Y n corner stapling mode the pawl on the stack feed out belt holds the stack of paper For booklet stapling this pawl stays at home position which is on the rear side so it does not interfere with booklet stapling 2 9 2 8 5 X 14 LEG
18. eeps the open ends of the booklets down The front booklet tray full sensor C and rear booklet tray full sensor D detect when the tray is full of booklets Mote front booklet tray full sensor is mounted higher than the rear booklet tray full sensor booklet tray is stationary When it becomes full the stapling and folding job stops until booklets are removed from the tray the booklet tray is not installed this is detected if the front and rear sensors remain OFF the machine will not operate in the booklet staple and fold mode When booklet mode is selected the tray full message appears on the operation panel The combinations of the two actuators and two sensors when the actuator arm rises determines the number of booklets that the tray can hold before the job stops Tray full detection depends on the size of the paper and the number of sheets in one stapled and folded booklet The condition detected by the machine O Ready Full 1 Full 2 Full 3 see the illustration above depends on the states of the sensors as shown in the table below SM 43 B793 Or N Oo aa Nn Booklet Tray Full 3 or booklet tray not installed In the tables below 51 denotes sheets in a stack Cnt denotes Count see below for an explanation After a booklet is feed out the fold roller motor stops the exit roller The machine then monitors the tray ful
19. ires the punches that punch holes in the paper below 2 12 4 PUNCH SELECTION AND FIRING C D The punch drive motor A turns the small notched encoder wheel B through the gap in the punch encoder sensor C The sensor output is used to control the punch timing B793 58 SM The timing for 2 hole punching E is different from 3 hole punching When the punch unit is at the punching position the punch motor turns until the encoder detects the starting position for 2 hole or 3 hole punching This is the 1 position in the diagrams the first diagram is for 2 hole punching and the second diagram is for 3 hole punching Ox 2 moc Ow Then the punch drive motor turns counter clockwise to the 2 position This movement punches the holes in the paper Then the punch drive motor turns clockwise to the 1 position to be ready for the next sheet of paper 2 12 5 PUNCH HOPPER MECHANISM A The punchouts fall from the punch unit into the punch hopper A SM 59 793 The punch hopper full sensor B does the following Signals that the hopper is full when it detects the top of the stack of punchouts that have collected in the hopper Detects when the punch hopper is set properly B793 60 SM
20. ive Layout for details Controls the rollers the entrance of the finisher Moves the shift tray up and down Transport Motor Shift Motor Moves the shift tray from side to side Stack Feed Controls the stack feed out belt 22 Controls the rollers that feed paper from the junction gate to the proof tray and to the shift tray see Drive Layout for details Out Motor Jogger Controls jogger the stapler tray Upper Controls the stopper S mechanism Also moves the upper clamp eie roller into contact and away from the stack of paper in the stapler tray Rotates the upper clamp roller B793 36 SM Component Layout Clamp Roller Motor Sap erat 36 Moves the stapler from side to side Motor Drives a large cam that alternately clamps and unclamps the lower clamp roller which is the idle roller of the clamp roller pair When these rollers are clamped they are part of the paper feed path 40 and feed the stack toward the bottom fence of the fold unit When the idle roller is retracted the stacks falls a very short distance 3 mm onto the fold unit bottom fence below These rollers remain unclamped while the bottom fence positions the stack for folding and while the stack is folded by the fold rollers Controls the rollers that fold the paper Motor 2 Controls plate that makes the fold paper Bottom Raises the bottom fence and stapled stack to the correct fold position
21. l sensors every feed out of a paper stack The machine checks a certain condition based on the size of the paper and the number of sheets in the booklet Two examples are shown below the table Tell the operators that the number of sheets that the lower tray can hold will vary greatly Lower Tray Full Condition Tables A3 DLT n 16 12 9 19 sont 2Cnt 2 2cnt 3cnt 4Cnt Cnt Cnt B793 44 SM Booklet Tray Examples After the copier makes a booklet with 1 sheet of 11 x 17 inch paper the machine checks every feed out of a paper stack for the Full 1 condition If the Full 1 condition occurs 15 times 15 Cnt in the table above the machine detects that the tray is full After the copier makes a booklet with 5 sheets of A4 LT paper the machine checks every feed out of a paper stack for the Full 2 condition If the Full 3 condition occurs 5 times 5 Cnt in the table above the machine detects that the tray is full Ox 2 moc Ow SM 45 B793 Jogger Unit 2 6 JOGGER UNIT D The jogger is used in corner staple mode and in booklet mode For each sheet of paper when it arrives in the staple tray the following is done jogger motor A drives the jogger fences B positioning roller solenoid moves the positioning roller C onto the top of the sheet Then the lower transport motor turns on and the positioning roller rotates to push the sheet
22. led by the Entrance Motor Jam Detection Proof Tray Exit Sensor F Tray Full Detection Proof Tray Full Sensor G B793 40 SM shift Tray 2 4 SHIFT TRAY 2 4 1 UP DOWN MOTION C D The shift tray motor A moves the tray up and down The upper limit switch B detects when the tray moves up too far and cuts power to the shift tray motor The shift tray position sensor C checks when the tray or the top of the stack is at the correct height to receive paper Shift Mode This is checked every 5 sheets Staple Mode This is checked every stack The lower limit sensor D detects when the tray is full At this point the tray cannot move down any more SM 41 B793 o N 85 x o c Ow Shift Tray 2 4 2 SIDE TO SIDE MOTION C A B The shift motor A moves the shift roller B from side to side The shift motor HP sensor C detects when the mechanism is at home position The upper transport motor rotates the shift roller When shift mode is used the shift motor turns on after each page is fed out Then for the next set the shift motor turns the other way In this way the user can easily divide the sets B793 42 SM Booklet Tray 2 5 BOOKLET TRAY A S B The sensor actuator arm A rests on the top of the stack of stapled booklets as they are output to the lower tray A flap depressor B k
23. of paper against the stopper there are two stoppers stopper L or stopper S the one that is used depends on the paper size as we shall see later The jogger HP sensor D detects when the jogger fences are at home position away from the stack The staple tray exit sensor E detects if a jam occurs when the machine feeds the stack out at the bottom of the jogger tray B793 46 SM Exit Guide Plate Paper Feed Out 2 7 EXIT GUIDE PLATE PAPER FEED OUT B C E NT Ox 2 Moc Ow F D The exit guide plate A opens when a stapled stack is fed out Also it opens every time a sheet is fed to the staple tray to prevent the paper running into the exit roller during stacking The exit guide plate motor B drives the exit guide plate The exit guide plate HP sensor C detects when the guide plate is at home position The stack feed out belt feeds out stapled stacks The pawl D on the belt moves the stack out to the exit The stack feed out motor E drives the belt The stack feed out HP sensor F detects when the belt is at home position SM 47 B793 Stapler Unit Movement 2 8 STAPLER UNIT MOVEMENT B D C E The machine has only one stapler A It does stapling for booklets and for corner stapling The stapler unit motor B moves the stapler from side to side The stapler unit HP sensor C detects when the stapler unit is at home position In corner staple mode at th
24. tor E Fold Plate Moves left and pushes the stack into the nip of the fold rollers and then moves right to retract SM 53 B793 Folder 2 11 3 FOLD ROLLERS F F Fold Roller Motor Drives forward to feed out the stack at the fold and then drives forward again to feed out the folded stack Mote This cycle be repeated by changing the setting of SP6136 G Fold Rollers Driven by the fold roller motor this roller pair feeds out the stack at its fold reverses to feed in the stack to and then feeds forward again assisted by the fold unit exit rollers not shown to feed out the stack to the lower tray B793 54 SM 2 12 PUNCH UNIT 2 12 1 OVERVIEW OF OPERATION Skew Correction Before Punching The finisher entrance roller corrects for paper skew and then the punch unit moves across to punch the holes at the correct position Each sheet is punched one at a time Paper feeds out of the copier The finisher entrance sensor A detects the leading edge of the sheet The finisher entrance roller B stops rotating briefly while the copier exit rollers continue to rotate This buckles the paper against the finisher entrance roller to correct skew The finisher entrance roller starts to rotate again and feeds the sheet into the finisher These SP codes adjust the skew operation in the punch unit SP6130 This SP corrects the punch hole alignment To do this it corrects
25. unit fires the punches to make the holes e The feed rollers feed the punched paper out of the punch unit and into the paper path The punch unit moves back to home position detected by the home position sensor F B793 56 SM 5 6129 5 6128 These SP codes adjust the punch hole alignment SP6128 Adjusts the punch positions in the direction of paper feed SP6129 Adjusts the punch position perpendicular to the direction of feed For more see Section 5 Service Tables 2 12 2 PAPER POSITION DETECTION im NT Ox N e C B The paper position sensor slide motor A extends and retracts the paper position slide that holds the paper position sensor B The paper position sensor detects the position of the paper edge The detected position of the paper is used to move the punch unit across to the correct position for punching When the paper position slide is retracted the paper position slide HP sensor C detects when the slider is at home position and stops paper position slide motor SM 57 B793 2 12 3 PUNCH UNIT MOVEMENT C B The punch movement motor A extends and retracts the punch unit to put it at the correct position for punching The punch movement HP sensor B detects the position when it retracts switches off the punch movement motor and stops the punch unit at its home position The punch drive motor C f
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