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Mita F-8220 Service Manual

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F-8220
SERVICE
MANUAL
Published in May '98
5A970760

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Summary of Contents for Mita F-8220

  • Page 1 F-8220 SERVICE MANUAL Published in May ’98 5A970760...
  • Page 2 SERVICE MANUAL F-8220...

  • Page 3: Safety Precautions

    Safety precautions This booklet provides safety warnings and precautions for our service personnel to ensure the safety of their customers, their machines as well as themselves during maintenance activities. Service personnel are advised to read this booklet carefully to familiarize themselves with the warnings and precautions described here before engaging in maintenance activities.

  • Page 4: Safety Warnings And Precautions

    Safety warnings and precautions Various symbols are used to protect our service personnel and customers from physical danger and to prevent damage to their property. These symbols are described below: DANGER: High risk of serious bodily injury or death may result from insufficient attention to or incorrect compliance with warning messages using this symbol.

  • Page 5: Installation Precautions

    indicates that action is required. The specific action required is shown inside the symbol. General action required. Remove the power plug from the wall outlet. Always ground the copier. 1. Installation Precautions WARNING •Do not use a power supply with a voltage other than that specified. Avoid multiple connections to one outlet: they may cause fire or electric shock.

  • Page 6: Precautions For Maintenance

    •Always handle the machine by the correct locations when moving it..•Always use anti-toppling and locking devices on copiers so equipped. Failure to do this may cause the copier to move unexpectedly or topple, leading to injury................•Avoid inhaling toner or developer excessively. Protect the eyes. If toner or developer is accidentally ingested, drink a lot of water to dilute it in the stomach and obtain medical attention immediately.
  • Page 7 •Check that the power cable covering is free of damage. Check that the power plug is dust-free. If it is dirty, clean it to remove the risk of fire or electric shock..................•Never attempt to disassemble the optical unit in machines using lasers. Leaking laser light may damage eyesight.
  • Page 8 •After maintenance, always check that all the parts, screws, connectors and wires that were removed, have been refitted correctly. Special attention should be paid to any forgotten connector, trapped wire and missing screws..................•Check that all the caution labels that should be present on the machine according to the instruction handbook are clean and not peeling.

  • Page 9: Table Of Contents

    CONTENTS 1. MAIN BODY ADJUSTMENTS............1-45 [1] Printer Gate Adjustment ........1-45 PRODUCT SPECIFICATIONS ........1-1 [2] Adjusting the Paper Route Switching Gate ..1-46 CENTRE CROSS SECTION ........1-2 [3] Adjusting the By-Pass Gate......1-47 DRIVE SYSTEM DIAGRAM......... 1-3 [4] Adjusting the Shift Position......

  • Page 10: Main Body

    MAIN BODY...

  • Page 11: Product Specifications

    PRODUCT SPECIFICATIONS 1. Type 3. Stapler kit Type: Offset sorting and stapling equip- Number of ment with printer outlet function. stapled sheets: Max 50 (80 g/m fine quality paper, 5 mm max) Staple position: A = 10 mm (Can be adjusted by ±3 mm) 2.

  • Page 12: Centre Cross Section

    CENTRE CROSS SECTION Sub-tray Shift unit Gate Shift tray Paper exit unit Printer gate By-pass gate Stacker unit Stapler unit Tray up-down wire 1 - 2...

  • Page 13: Drive System Diagram

    DRIVE SYSTEM DIAGRAM [1] Paper Conveyance Drive Printer paper exit roller Conveyance slide shaft Conveyance motor (M1) Conveyance roller B Conveyance roller A Conveyance roller C Middle One-way clutch sponge roller [2] Stacker Drive Paper exit roller Paper exit roller motor (M7) Paper exit belt Stacker entrance roller Sponge roller...

  • Page 14: Paper Conveyance Path

    PAPER CONVEYANCE PATH [1] Paper Conveyance Path As per the diagram below, the finisher has three paper conveyance paths. Sub-tray Shift tray a. Normal (non-staple/group/off-set) mode conveyance path. b. Staple mode conveyance path. c. Printer mode conveyance path. 1 - 4...

  • Page 15: Non-Staple Mode

    [2] Non-staple Mode As per the diagram below, paper exited from the main body is received and discharged straight to the shift tray. Shift tray Conveyance roller A Paper exit roller Conveyance Conveyance roller C roller B 1 - 5...

  • Page 16: Group Mode

    [3] Group Mode (1) The odd-numbered pages are exited straight to the shift tray. (2) The even-numbered pages are shifted 30 mm to the rear by the off-set conveyance section and then exited to the shift tray. (a) Release the pressure of the pressure roller (SD3). (b) The paper is gripped and moved 30 mm to the rear.

  • Page 17: Off-Set Mode

    [4] Off-set Mode (1) Paper for odd-numbered sets is exited to the shift tray. (2) Each page of the paper of even-numbered sets is shifted 30 mm to the rear by the off-set conveyance section and then exited to the shift tray. (a) Release the pressure of the pressure roller (SD3).

  • Page 18: Printer Mode

    (4) The second and subsequent stacks of paper are [6] Printer Mode conveyed and stacked. (1) Face-down exit. (a) The first page is already stopped in the stacker (a) The paper is sent on the conveyance path of the entrance and the stacker entrance roller stops normal mode.

  • Page 19: External Section

    EXTERNAL SECTION [1] Construction Top cover Rear cover Shift tray Front cover Paper exit stopper plate Front side cover [2] Disassembly and Assembly (2) Open the front cover. (3) Remove the 4 screws and remove the top cover. CAUTION: Be sure that the power cord has been unplugged from Top cover the outlet.
  • Page 20 2. Removing and installing the front cover (3) Remove the 2 screws, lift up and remove the shift a. Procedure tray. (1) Open the front cover. (2) Remove the 4 screws and remove the front cover. Shift tray Screws Screws Front cover (4) Reinstall the shift tray by reversing the procedure above.
  • Page 21 5. Removing and installing the paper exit stopper (4) Remove the 2 screws and take out the up-down plate support plate (front and rear). a. Procedure (1) Remove the rear cover, shift tray and the front side cover. Up-down (2) Remove the 4 screws and remove the left and right Up-down support plate support plate...

  • Page 22: Conveyance Section

    CONVEYANCE SECTION [1] Construction Conveyance motor (M1) Printer paper exit roller Paper exit roller motor (M7) Pressure paper exit roller Conveyance roller B Conveyance slide shaft Paper exit roller (sponge roller) Conveyance roller A Stacker entrance Conveyance roller C motor (M14) Middle sponge roller Stacker entrance roller Sponge roller...
  • Page 23 2. Paper path switching (1) The grip solenoid (SD3) turns ON and the pressure of the pressure roller is released. Printer gate Gate Printer paper exit solenoid (SD2) By-pass By-pass gate solenoid Pressure roller (SD5) Gate solenoid Grip solenoid (SD1) (SD3) The paper route switches using the gate, printer gate and by-pass gate.

  • Page 24: Stacker Unit

    (3) The paper is gripped by the roller shaft motor (M2), 4. Stacker unit cam and link mechanism. Roller shift motor (M2) Link Front Back Alignment Alignment plate plate motor Paper exit Paper (M5) Paper grip Alignment plate belt Paper exit arm section Paper alignment (4) Paper is moved 30 mm to the rear and separated, and...

  • Page 25: Paper Exit Opening Unit

    5. Paper exit opening unit (3) Pressure of the paper exit roller The paper exit roller rotation is slower than the conveyance rollers A, B and C. Therefore pressure is released at times other than when paper is Paper exit Paper exit opening opening...

  • Page 26: Disassembly And Assembly

    [3] Disassembly and Assembly (4) Remove the E-ring and the shaft holder. CAUTION: Be sure to remove the power cord from the power Middle sponge roller shaft outlet. 1. Exchanging the middle sponge roller a. Procedure E-ring (1) Remove the rear cover. (2) Loosen the screw of the timing belt tension plate and after loosening the belt tension, tighten the screw.
  • Page 27 (6) Reinstall the middle sponge roller by reversing the 3. Exchanging the paper exit roller (sponge roller) procedure above. shaft a. Procedure CAUTION: (1) Remove the rear and top covers. After temporarily loosening the screw for the belt (2) Rotate the paper exit opening open-shut gear by tension plate, ensure that the screw is tightened again.
  • Page 28 (5) Remove the E-ring and the shaft holder. 4. Removing and reinstalling the shift unit a. Procedure (1) Remove the following parts: • rear cover • top cover. (2) Remove M2, PS18 and the connector of SD4. (3) Remove the wiring from the four clamp positions. Shaft holder SD4 connector...
  • Page 29 (7) Remove the belt and pulley. (4) Remove the collar, E-ring and shaft holder. (8) Remove the screw and then remove the shift unit. E-ring Shaft holder Belt Collar Screw Pulley (5) Remove the clamp screw and the ground wire screw. (9) Reinstall the shift unit by reversing the procedure (6) Remove SD4 and the connector of PS6.
  • Page 30 (7) Remove the paper exit opening open-shut link screw. (9) Remove the spring. Spring Paper exit opening open-shut link Screw (8) Open the front cover and remove the front side (10) Remove the 4 screws and then remove the paper E-ring and shaft holder.
  • Page 31 6. Removing/installing the stacker unit (5) Shift and remove the shaft holder. a. Procedure (1) Remove the following parts: • rear cover • top cover • front side cover • shift unit • paper exit opening unit. (2) Take out the E-ring and flange, then remove the belt and the two pulleys.
  • Page 32 (7) Remove the screw and then remove PS9. (9) Remove CN6 and CN3 on the FIN control board and the stapler connectors F and R. Then remove the wiring from the clamp. Screw Clamps Stapler R connector Clamp Stapler F connector (8) Remove the 2 screws and then remove the support stay.
  • Page 33 CAUTION: When the stacker paper exit arm is in the posi- (2) Tear off the old neutralising brush. tion as that of the diagram, engage the gear so that the notch of the detection gear actuator Neutralising meets with the edge of PS9 as per the diagram brush (old) below.
  • Page 34 8. Exchanging the paper exit opening neutralising (3) Remove the drive pulley from the shaft. brush a. Procedure (1) Tear out the old neutralising brush. (2) Stick the new neutralising brush on so that it lines up with the marked line. Marking Neutralising line...
  • Page 35 10. Removing and installing the printer paper exit (4) Open the front cover, remove the E-ring and shaft roller holder which are to the front and then remove the a. Procedure printer paper exit roller. (1) Remove the following parts: •...

  • Page 36: M1 (Conveyance) Control

    11. Removing and installing the conveyance [4] M1 (Conveyance) Control roller A a. Procedure (1) Remove the rear cover. (2) Remove the pulley, belt, pulley with clutch and the helical gear. 5-A1 M1 BLK 5-B10 P.GND 5-B9 101-12 M1 CONT S.GND 101-4 M1 CLK...

  • Page 37: Output Signals

    Printer mode (face up) b. Output signals M1 rotates as a result of the finisher operation commence- (1) RxD (FNS CB main body CB) ment signal from the main body and will stop rotating This is a serial data line to transmit the operational after a fixed period of time from when PS1 (printer paper state of the finisher to the main body.

  • Page 38: Gate Control

    [5] Gate Control Printer mode when the last page is output SD2 (printer) turns ON with the mode signal from the main body and the printer gate switches to the sub- tray side. SD1 DRV 1-B5 P.GND 101-12 1-B6 S.GND 101-4 Once the trailing edge of the last page has passed PS1 101-6...

  • Page 39: Input Signals

    2. Signals [6] M14 (Stacker Entrance) Control a. Input signals (1) TxD (main body CB FNS CB) This is a serial data line to transmit the operational P.GND 101-12 state of the main body CB to the FNS CB. S.GND 101-4 24V GND 101-6...

  • Page 40: M5 (Alignment Plate) Control

    2. Signals [7] M5 (Alignment Plate) Control a. Input signals (1) TxD (main body CB FNS CB) This is a serial data line to transmit the operational state of the main body CB to the FNS CB. (2) ACK (main body CB FNS CB) Main body communication signal (cannot be received).

  • Page 41: M2 (Roller Shift) And Sd3 (Grip) Control

    2. Signals [8] M2 (Roller Shift) and SD3 (Grip) Control a. Input signals (1) TxD (main body CB FNS CB) This is a serial data line which transmits the P.GND 101-12 S.GND 101-4 operational state of the main body CB to the FNS CB. M2 DRV 1-B1 101-6...

  • Page 42: M7 (Paper Exit Roller) Control

    2. Signals [9] M7 (Paper Exit Roller) Control a. Input signals (1) TxD (main body CB FNS CB) This is a serial data line which transmits the operational state of the main body CB to the FNS CB. P.GND 101-12 1-A4 S.GND 101-4...

  • Page 43: Sd4 (Paper Exit Opening) Control

    2. Signals [10] SD4 (Paper Exit Opening) Control a. Input signals (1) TxD (main body CB FNS CB) This is a serial data line which transmits the P.GND 101-12 operational state of the main body CB to the FNS CB. S.GND 101-4 SD4 DRV...

  • Page 44: M8 (Paper Exit Opening) Control

    2. Signals [11] M8 (Paper Exit Opening) Control a. Input signals (1) TxD (main body CB FNS CB) This is a serial data line which transmits the P.GND 101-12 operational state of the main body CB to the FNS CB. S.GND 101-4 M8 DRV...
  • Page 45 When paper When paper When exiting to exited to copy starts the stacker the tray Staple Open Open Closed (large size) Staple Closed Closed Closed (small size) Off-set Closed – Closed 2. Signals a. Input signals (1) TxD (main body CB FNS CB) This is a serial data line which transmits the oper- ational state of the main body CB to the FNS CB.

  • Page 46: Stapler Unit

    STAPLER UNIT [1] Construction Stapler F Stapler cartridge Stapler R [2] Mechanism 1. Stapling in one place 2. Stapling in two places Stapler moving motor (M11) Stapler F Stapler R Stapler rotation Stapler R Stapler F motor (M12) The stapler F and R moves to the stapling position. The stapler F and R is rotated so that it is parallel to the Movement of the stapler F and R is performed by the stapler paper and stapling made in two places.

  • Page 47: Staple Operation

    3. Staple operation [3] Disassembly and Assembly The staple operation is driven by the F and R stapler CAUTION: motors (M9 and M10) and operated by the cam rotation. Be sure that the power cord has been removed from the The home position sensors (PS15 and PS17) detect that power outlet.
  • Page 48 (5) Remove the connector from the stapler. 3. Removing and installing the stapler unit a. Procedure (1) Remove the stapler. (2) Close the stapler section. Connector (3) Remove connector CN2 from the board. (4) Open the clamp in four places and then remove the harness.

  • Page 49: Stapler Control

    (7) Remove the E-ring fixed by the shaft and remove [4] Stapler Control the stapler. P.GND 101-12 S.GND 101-4 101-6 2-A1 2-A2 E-ring M11 DRVA 2-A3 101-3 10-1 M11 DRVA 2-A4 101-7 10-2 2-A5 M11 DRVB 10-3 101-1 M11 DRVB 2-A6 101-8 10-4...
  • Page 50 Stapler two position movement control (6) PS16 IN (PS16 FNS CB) Through the ON signal from the main body copy button If there are no staples detected in stapler F, this the stapler is rotated by M12 (stapler rotation) so that the signal turns ON and [L] is output.

  • Page 51: Shift Tray Section

    SHIFT TRAY SECTION [1] Construction (2) Remove the 4 screws of the cable bracket and remove the up-down stay. Shift tray Screws Screws Wire Worm gear Tray up- down motor Pulley (M3) Cable Gearbox bracket (rear) Up-down shaft Cable Up-down stay Pulley bracket (front)
  • Page 52 2. Exchanging the up-down cable (4) Move the up-down stay so that the inner cable which a. Procedure is not removed (the shorter side from the cable bracket) is wound around twice. CAUTION: The following procedure uses the cable to the very front as an example.

  • Page 53: Shift Tray Up-Down Control

    (8) Wrap the opposite side (long portion) of the cable [4] Shift Tray Up-Down Control around the up-down pulley from the inside to the outside and fix the cable end. P.GND 101-12 Cable (long S.GND 101-4 M3 DRVF M3 DRVR 101-6 portion) 101-3...
  • Page 54 b. Staple mode b. Output signals When paper passes PS6 (paper exit 1), M3 (tray up- (1) RxD (FNS CB main body CB) down) will raise the shift tray until PS7 (tray upper limit) This is a serial data line which transmits the turns ON.

  • Page 55: Adjustments

    ADJUSTMENTS [1] Printer Gate Adjustment (2) When the printer paper exit solenoid (SD2) is ON, check that the gap between the solenoid plunger 1. Tools used and the bracket stopper is of the value stated below. • Phillips head screwdriver Value: B = 5 ±...

  • Page 56: Adjusting The Paper Route Switching Gate

    [2] Adjusting the Paper Route (3) Loosen the two solenoid installation screws then move and adjust the solenoid. Switching Gate 1. Tools used • Phillips head screwdriver • Scale. Solenoid installation screws 2. Preparation (1) Remove the rear and top covers. 3.

  • Page 57: Adjusting The By-Pass Gate

    [3] Adjusting the By-Pass Gate (3) When the by-pass solenoid (SD5) is ON, check that the gap between the solenoid plunger and the 1. Tools used bracket stopper is of the value stated below. • Phillips head screwdriver Value: B = 4.2 ± 0.5 mm. •...

  • Page 58: Adjusting The Shift Position

    [4] Adjusting the Shift Position (3) Loosen the roller shift HP (PS18) bracket screws then move and adjust the bracket. 1. Tool used • Phillips head screwdriver. Screw 2. Preparation (1) Remove the rear and top covers. 3. Adjustment procedure (1) Turn the power OFF-ON-OFF.

  • Page 59: Adjusting The Open/Close Section Of The Paper Exit Opening

    [5] Adjusting the Open/Close Section of (2) Loosen the paper exit opening detection PS (PS12) bracket screw then move and adjust the bracket. the Paper Exit Opening 1. Tool used • Phillips head screwdriver. Bracket 2. Preparation (1) Remove the rear and top covers. 3.

  • Page 60: Adjusting The Paper Exit Opening Solenoid

    [6] Adjusting the Paper Exit Opening (3) Loosen the 2 solenoid installation screws then move and adjust the solenoid. Solenoid 1. Tools used • Phillips head screwdriver Solenoid • Scale. 2. Preparation (1) Remove the rear and top covers. 3. Adjustment procedure (1) When the paper exit opening solenoid (SD4) is ON, check that the gap between the solenoid plunger and the bracket stopper is of the value stated below.

  • Page 61: Lower Plate Guide

    [7] Adjusting the Paper Exit Opening (2) Loosen the 2 solenoid bracket screws then move and adjust the solenoid. Lower Guide Plate 1. Tools used • Phillips head screwdriver Bracket/solenoid • Scale. 2. Preparation (1) Remove the rear and top covers. 3.

  • Page 62: Adjusting The Stacker Paper Exit Belt Tension

    [8] Adjusting the Stacker Paper [9] Adjusting the Alignment Plate Exit Belt Tension Installation Position 1. Tools used 1. Tools used • Phillips head screwdriver • Phillips head screwdriver • Tension gauge or spring balance. • scale. 2. Preparation 2. Preparation (1) Perform this adjustment before installing the unit if (1) Remove the stacker unit.

  • Page 63: Adjusting The Alignment Drive Timing Belt Tension

    [10] Adjusting the Alignment Drive Timing [11] Adjusting the Stapler Rotation Drive Belt Tension Section Installation 1. Tools used 1. Tool used • Phillips head screwdriver • Phillips head screwdriver. • Tension gauge or spring balance. 2. Preparation 2. Preparation Perform the following adjustment when the stapler unit (1) Perform this adjustment before reinstalling the rotation drive section is removed, before reinstalling the...

  • Page 64: Adjusting The Stapler 2 Position Staple Position

    [12] Adjusting the Stapler 2 Position [13] Adjusting the Staple Slant of the Staple Position Stapler 2 Position Mechanism 1. Tools used 1. Tools used • Phillips head screwdriver • Phillips head screwdriver • Scale. • scale. 2. Preparation 2. Preparation Operate the stapling mechanism in two positions and (1) Operate the stapler 2 position stapling mechanism check that the staple position is 10 mm from the paper...

  • Page 65: Adjusting The Stapling Position For 1 Position Stapling

    [14] Adjusting the Stapling Position for [15] Adjusting the Tension of the Stapler 1 Position Stapling Move Timing Belt 1. Tools used 1. Tools used • Phillips head screwdriver • Phillips head screwdriver • scale. • Tension gauge or spring balance. 2.

  • Page 66: Diagrams

    DIAGRAMS...

  • Page 67: Electrical Parts Layout Drawing

    ELECTRICAL PARTS LAYOUT DRAWING & 1. Switches and sensors ! PS11 1 MS1 Staple movement HP detection PS Interlock @ PS12 2 PS1 Paper exit opening detection PS Printer paper exit detection PS # PS14 3 PS2 No R staple detection PS Tray upper limit detection PS $ PS15 4 PS3...
  • Page 68 ‹ ¤ Á ‡ fl ˇ ´ fi ‰ ¨ „ ‚ · Œ ° › 2. Motors and solenoids ‚ M11 ¤ M1 Stapler movement motor Conveyance motor Œ M12 ‹ M2 Stapler rotation motor Roller shift motor „ M14 ›...

  • Page 69: Connector Layout Diagram

    CONNECTOR LAYOUT DIAGRAM 2 - 3...

  • Page 70: Finisher Overall Wiring Diagram

    FINISHER OVERALL WIRING DIAGRAMS [How to see the diagram] 1. The signals shown reflect levels present under normal idleing conditions with the main switch turned ON. 2. Wiring symbols in the figure are as follows. [Symbol] is ribbon cable. (4) Signal flow 50-1 The solid black circle ( ) among...

  • Page 71: Finisher Control Board Circuit Diagram (1/3)

    FINISHER CONTROL BOARD CIRCUIT DIAGRAM (1/3) 2 - 5...

  • Page 72: Finisher Control Board Circuit Diagram (2/3)

    FINISHER CONTROL BOARD CIRCUIT DIAGRAM (2/3) 2 - 6...

  • Page 73: Finisher Control Board Circuit Diagram (3/3)

    FINISHER CONTROL BOARD CIRCUIT DIAGRAM (3/3) 2 - 7...

  • Page 74: Finisher Timing Chart

    FINISHER TIMING CHART " × 11", 2 page originals, 3 sections) (2 position staple mode, A4/8 2 - 8...
  • Page 75 FINISHER TIMING CHART " × 11", 2 originals, 5 sections, 1:1 ratio) (Off-set mode, A4/8 2 - 9...

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