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Sharp SF-2020 Service Manual
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Sharp SF-2020 Service Manual

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SF-2020
SF-2120
[ 1 ] PRODUCT OUTLINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 – 1
[ 2 ] PRODUCT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 – 1
[ 3 ] PRODUCT VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 – 1
[ 4 ] UNPACKING AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 – 1
[ 5 ] DESCRIPTION ON EACH SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 – 1
[ 6 ] DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 1
[ 7 ] ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 – 1
[ 8 ] SIMULATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 – 1
[ 9 ] SELF DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 – 1
[10] MEMORY TROUBLES, FLOWCHART FOR REPLACEMENT OF
MAIN CONTROL PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 – 1
[11] MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 – 1
[12] ELECTRICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 – 1
Parts marked with "!" is important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
SERVICE MANUAL
CONTENTS
SHARP CORPORATION
CODE: 00ZSF2120SM/E
SF-2020
MODEL
SF-2120
MODEL
•
Option
Paper tray (SF-UB15)
•
Two-step paper feed unit (SF-CM15)
•
One-step paper feed unit (SF-CM16)
•
Personal counter (SF-71A/71B)
•
10-bin sorter (SF-S17) @
•
10-bin staple sorter (SF-S54) @
•
Auto document feeder (SF-A18) @
•
Reverse automatic document feeder
(SF-A57) @
@ For the options, refer to their service manuals.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

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Summary of Contents for Sharp SF-2020

  • Page 1 SERVICE MANUAL CODE: 00ZSF2120SM/E SF-2020 MODEL SF-2120 MODEL • Option Paper tray (SF-UB15) SF-2020 • Two-step paper feed unit (SF-CM15) • One-step paper feed unit (SF-CM16) • Personal counter (SF-71A/71B) • 10-bin sorter (SF-S17) @ • 10-bin staple sorter (SF-S54) @ •...

  • Page 2: Table Of Contents

    Contents [1] PRODUCT OUTLINE 8. Toner supply ......4-5 ....1-1 9.
  • Page 3 1-8. Transport roller ..... 6-3 B. DB blade replacement (Replace every 120K copies.) ..6-21 1-9.
  • Page 4 2-6. Process section adjustment ..7-21 [8] SIMULATION ......8-1 1.

  • Page 5: Product Outline

    [1] PRODUCT OUTLINE 1. Product features (1) Compact body (2) Clean copy gentle to the environment • • Compact body size Silent design, The body width of 600mm is the smallest in the class. • Low level of ozone, use of recyclable materials •...

  • Page 6: Product Specifications

    (3) Warm up time: 45 sec or less SF-2020 SF-2120 600 × 585 × 460 600 × 585 × 510 (4) First copy time: SF-2020 W x D x H mm 5.3 sec (Paper feed port: Upper tray) Occupying area 850 × 595 900 ×...

  • Page 7: Description Of Each Section

    2. Description of each section Charging system (–) DC saw teeth electrode system (1) Paper feed section Transfer system (–) tungsten system SF-2020 SF-2120 Separation system (AC) separation tungsten system A3 ∼ A6/W letter ∼ Invoice Copying size (4) Developing section...

  • Page 8: Supply Parts

    3. Supply parts U.S.A., Canada Name Content Life Product name Photoconductor kit Photoconductor drum SF-216DR Cleaner blade Drum separation pawl Black developer Black Black developer (530g) x 10 50K x 10 SF-216MD1 Color developer Color developer (550g) x 10 10K x 10 SF-780MD2 Blue SF-780MD3...
  • Page 9 Middle and South America/Asia Name Content Life Product name Photoconductor kit Photoconductor drum SF-216DR Cleaner blade Drum separation pawl Black developer Black Black developer (530g) x 10 50K x 10 SF-216CD1 Color developer Color developer (550g) x 10 10K x 10 SF-780LD2 Blue SF-780LD3...

  • Page 10: Optional Specifications

    Functions 4. Optional specifications Original detection on the Available (For originals of indefinite (1) Automatic document feeder (ADF) tray sizes, scanning is made.) Detection size Japan: A3, B4, A4, A4R, B6, B6R <Model name: SF-A18> Inch series: 11" × 17", 8 1/2" × 14", 8 Original set direction Face up 1/2"...

  • Page 11: Bin Staple Sorter (10-Bin Ss)

    (4) 10-bin staple sorter (10-bin SS) (5) Two-step paper feed unit <Model name: SF-S54> <Model name: SF-CM15> A3 ∼ A5 Type Copier installation type/hanging type Paper size Distribution system Bin shift system by lead screw Paper feed capacity 250 sheets x 2 steps 56 ∼...

  • Page 12: Product Views

    Paper exit tray Grip Manual feed unit Manual feed original guide Manual feed tray Operation panel Front cover Power switch Paper tray (SF-2020), Duplex tray (SF-2120) Paper tray Developing unit grip Developing unit strap Toner hopper Developing unit lock lever Release lever...

  • Page 13: Maintenance

    2. Operation panel SF-2020 (AB series) 9 10 ORIGINAL PAPER PRESET 200% SORTER EXPOSURE POWER SAVE AUDIT CLEAR SIZE SIZE RATIO 141% SORT 122% 115% STAPLE 100% SORT GROUP EXTRA 1 2 3 4 5 LIGHT DARK TRAY SELECT AUTO IMAGE...
  • Page 14 SF-2120 (AB series) 9 10 ORIGINAL ORIGINAL PAPER PRESET 200% SORTER EXPOSURE POWER SAVE AUDIT CLEAR TO COPY SIZE SIZE RATIO 141% AUTO SORT 122% MANUAL 115% PHOTO 100% STAPLE SORT Z OOM INTERRUPT GROUP EXTRA 1 2 3 4 5 LIGHT DARK TRAY SELECT...

  • Page 15: Clutches, Solenoids, And Motors (Explained With The Sf-2120 And The Sf-Cm15)

    3. Clutches, solenoids, and motors (Explained with the SF-2120 and the SF-CM15) Clutches and solenoids Signal name Name Functions, operations PSPS Paper separation solenoid Paper separation solenoid drive Resist roller clutch For resist roller rotation Transport roller clutch For transport roller rotation CPFC1 Tray paper feed clutch (Paper is fed from the ADU in the SF-2120) For paper feed roller rotation...
  • Page 16 4. PWB (Explained with the SF-2120 and the SF-CM15) Name Description Name Description Operation PWB A Operation input, display control Operation PWB B Operation input, display control Blank lamp PWB Used to control the blank lamp. DL PWB Used to drive the discharge lamp. Optical PWB AE sensor and lens motor interface Process control PWB...
  • Page 17 Tact switch Shorted when the switch is turned on. L PED1 Body upper tray paper presence detection (SF-2020 only) Transmission photo sensor HIGH when paper is present. M PED2 Body lower tray paper presence detection Transmission photo sensor HIGH when paper is present.

  • Page 18: Rollers, Mirrors, Etc

    6. Rollers, mirrors, etc. Name Name Name No. 3 mirror No. 2 mirror No. 1 mirror Copy lamp No. 4 mirror No. 5 mirror No. 6 mirror Developing unit toner box Manual tray — Take-up roller Paper feed roller Reverse roller PS front roller follower roll PS front roller Developing unit...

  • Page 19: Unpacking And Installation

    2 Avoid high temperature and high humidity, and avoid sudden [4] UNPACKING AND INSTALLATION temperature change. (Avoid installation near a cooler or a heater.) If not, paper absorbs moisture and dew forms in the machine, causing paper jam or degraded image quality. 1.

  • Page 20: Space Around The Machine

    5 Avoid installation to a poorly ventilated place. (5) Grounding wire connection 1 Connect the grounding wire to prevent against a danger. 2 When connecting the grounding wire, connect only to the ground- ing object (the grounding terminal of the power outlet, etc.) and never connect to a gas pipe.

  • Page 21: Optical System Lock Release

    3. Optical system lock release 4. Charger cleaning A. No. 2/3 mirror unit lock release A. Main charger unit electrode cleaning Remove the one fixing screw of the No. 2/3 mirror unit on the left side 1 Press the hook section of the main charger unit to release lock, of the copier.

  • Page 22: Developing Unit Setting

    4 Return the electrode section to the original position and fix it with a 3 Remove three fixing screws of the toner hopper of the developing screw. unit, and remove the toner hopper. 5 Insert the main charger unit along the guide groove in the copier fully to the bottom.

  • Page 23: Toner Density Sensor Level Adjustment

    6 Hold the hand carry strap of the developing unit and insert it into 7. Accessory installation the copier fully to the bottom. A. Copier tray installation Install the copy tray to the paper exit section on the left side of the copier.
  • Page 24 3 Hold the grip of the toner hopper shutter, and slowly pull out the 6 Slide the toner cartridge to the bottom and remove it slowly. shutter fully toward you. If the shutter have not been pushed completely in procedure (5), If the shutter won’t move, the procedure in may have not the toner cartridge cannot be slid.

  • Page 25: Center Shift Adjustment

    9. Center shift adjustment 10. Label attachment There is basically no need to perform the center shift adjustment A. Label attachment because it is made when shipping. If the center should be shifted, adjust in the following procedures. Attach the magnification ratio select label packed together with the Make a copy.

  • Page 26: Sf-Cm15) Installation

    3 The following procedure must be performed by two persons. 11. Optional two-step paper feed unit Hold the grips of the copier, and insert the positioning bosses (2 (SF-CM15) installation positions) of the two-stage paper feed unit into the positioning holes (2 positions) on the bottom of the copier.
  • Page 27 Connect the rear side of the copier with two connection screws C. 12. Optional one-step paper feed unit (SF-CM16) Connection screw C Connection screw C Included parts 6 Remove the connecter which is fixed to the rear cabinet of the two-stage paper feed unit with tape.
  • Page 28 3. Placing the main copier unit over the paper feed unit [Note] • The following procedure should always be performed by two per- sons. Lift the main copier unit by the grips and slip the two positioning holes on the bottom of the main copier unit over the two position- ing bosses on the paper feed unit, then set the four feet on the main copier unit in their proper places on the paper feed unit.

  • Page 29: Tray Paper Size Selection

    Immediately after the above key operation, operate the keys as centered. follows: 13. Tray paper size selection (Described with the SF-2020) Select the necessary size according to the following procedures. 9. Centering the paper (A5 size paper is treated as a special size. When shipping, the size is set to A3.)
  • Page 30 3. Remove the size block upward, and fit to the suitable paper size. A3 size B4 size A4 size Hole Hole Hole Hole B5 size size size Hole Hole Hole Hole Hole Hole A5 size When the size is changed to A5, fit Special Hole Hole the size block display to"Special."...

  • Page 31: Descriptions Of Each Section

    In the case of SF-2020: [5] DESCRIPTIONS OF EACH The SF-2020 is provided with the three-way paper feed system. The SECTION tray is of the universal type and has capacity of 250 sheets. The front loading system allows the tray to be loaded from the lower side of the front cabinet.

  • Page 32: Developing Section

    2. Developing section (Details of DV harness connector) 1) General descriptions For bias For color identification (1) Two-component developer The developer is composed of toner and carrier. Carrier serves as a medium for attaching toner onto the electrostatic image on the photoconductor drum. By stirring toner and carrier, they are rubbed to be charged positive (+) and negative (–) respectively.

  • Page 33: Basic Operations

    3) Basic operations (Cassette paper feed) Proccess Main motor When the CPFC (cassette paper feed clutch) is turned on, the paper unit feed roller shaft, the paper feed roller, and the take-up roller rotates in Main drive unit the direction of A, and the roller release arm is moved downward by Stirring roller the limiter spring.
  • Page 34 (1) Original table (2) Copy lamp The original table is fixed. The original is set in the left center position. 100V series: 85V, 275W 200V series: 170V, 310W (3) Mirror This model uses six mirrors. No. 1 mirror is attached to the copy lamp unit, No. 2/3 mirrors are attached to No.
  • Page 35 Parts identification and functions Lens home position sensor Mirror motor Mirror home position sensor Lens No. 4/5 mirror unit AE sensor No. 2/3 mirror unit Reflector drive motor Copy lamp Copy lamp unit Lens drive wire No. 4/5 mirror unit Lens Lens unit...

  • Page 36: Basic Operations

    (20) Original size sensing Mirror base scan speed The original size is sensed by the original interruption system. The LED in the rear frame side emits light to the table glass surface. Lens and mirror positions The original interrupts this light, and its size is detected. are changed to adjust the Light emit Table glass...
  • Page 37 (Optical system dirt correction) Reference plate (Glass holder) Table glass This model perform dirt correction by changing the copy lamp inten- sity according to the dirt degree in the optical system (the copy lamp unit, No. 1 mirror, No.2 mirror, No.3 mirror) to prevent against remark- able degrading of copy quality.

  • Page 38: Copy Process

    (4) Copy process This model basic process and structure • The Scorotron method is used to evenly charge the photoconduc- tor surface to the given potential in the charge process. The corona wire regularly used is now replaced with a new corona charge mechanism that employs the 0.1mm thick stainless steel saw teeth plate, in order to suppress ozone generated when the oxide molecule in air is ionized.

  • Page 39: Process Diagram

    (2) Process diagram Original Mirror lens Copy lamp High voltage unit Blank lamp Main corona unit Charging Exposure Discharge lamp Discharging Discharge High voltage unit Toner Development Developer Cleaning blade Cleaning Waste toner collection Separation Manual paper feed Drum upper Paper feed roller Resist roller Paper cassette...

  • Page 40: Details Of Image Forming Process

    (3) Details of image forming process Step 1 (Main Charging) By negative discharging of the main charger, uniform negative char- ges are applied to the OPC drum surface. The OPC drum surface potential is controlled by the screen grid voltage to maintain the grid voltage at a constant level. •...
  • Page 41 Low intensity in Medium intensity HIgh intensity in the area corre- the area corre- in the area corre- sponding to the sponding to the sponding to the darker density lighter density of medium density portion of the portion of the the document document document...
  • Page 42 Step 4 (Transfer) The transfer paper is charged higher than the OPC drum surface potential by strong negative discharge of the transfer charger, making the binding force between the transfer paper and toner stronger than that between the drum and toner, attracting toner to the transfer paper.
  • Page 43 Step 6 (Cleaning) Residual toner on the drum is removed by the cleaning blade. The removed toner is sent to the waste toner container by the waste toner transport screw. Blade Aluminum layer Blank lamp Main corona unit Discharge lamp Developer unit Cleaning blade MG roller...

  • Page 44: Potential

    (4) Transition of photoconductor surface potential Develop Charge Exposure Transfer Separate Clean -730V Dark area Developing bias voltage -215V Light area Residual potential (5) Photoconductor drum sensitivity correction In this model, fall in sensitivity due to long use of the photoconductor drum is corrected by the copy lamp light intensity to prevent against considerable change in copy quality.
  • Page 45 Process control The grid voltage value where the same density level as the refer- ence level is obtained is displayed by Sim. 44-9 "a". This value is 1 Toner patch images are formed on the photoconductor surface displayed with 50 as the center in the range of 0 ~ 99 in integer under the three process conditions (MC grid bias voltage).

  • Page 46: Transport/Fusing Section

    Waste toner transport The waste toner is passed through waste (5) TRANSPORT/FUSING SECTION toner transport screw 1 and waste toner mechanism: 1) General pipe 2 to waste toner bottle 3. The SF-2116/2118 allows transport of paper of max. A3 (11" x 17") Waste toner bottle 3 is rotated by the and min.

  • Page 47: High Voltage Section

    5 Drive system division (7) High voltage section The fuser unit is rotated by the main drive unit. In case of manual 1) General rotation of the fuser unit to remove paper jam, however, excessive There are three kinds of coronas; the main corona, the transfer loads may be applied to the gears.
  • Page 48 DPTD (DDM rotary encoder sensor) 5 -1 DPHPS1 (Alignment plate home position sensor) 2) Details of operation 1 The alignment plate and the rear edge plate detect the home positions, and moves to the paper size position. (ADU motor 1, 2, 2 Paper exit, reverse unit operation (ADU gate solenoid ON) 3 Rollers in the ADU rotate in the direction of paper entry.

  • Page 49: Disassembly And Assembly

    (Note for assembly) [6] DISASSEMBLY AND ASSEMBLY 1) There is the 8-pin connector on the back of the rear frame side. When assembling it, carefully insert. The descriptions are divided into the following sections. 2) The belt must be on the paper feed unit gear and the resist roller 1.

  • Page 50: Ps Front Roller Ass'y

    (Note for assembly 2) 1-4. Separation roller When attaching the paper feed section roller ass’y, adjust so that the Remove the paper feed unit and remove the separation roller. paper feed roller clutch and the PS front roller ass’y clutch projection face toward the paper feed side.

  • Page 51: Lower Paper Feed Unit

    (Note for assembly) Attach the paper feed roller so that the one-way clutch is on the rear frame side. (Be careful of the direction.) Attach the roller holder as shown below. One-way clutch side 1-6. Lower paper feed unit 1-8. Transport roller (SF-2118 only): Perform similarly for the optional Perform similarly for the optional paper feed unit.

  • Page 52: Transport Belt

    TC/SC case 4) When attaching the resist roller ass’y to the copier, attach over the upper side of the PS roller lower mylar, then rotate the roller to set the mylar to the normal position. (If the mylar is deformed, it may Remove the hook of the front frame side bearing, and lift it up to cause paper jam.

  • Page 53: Fusing Section

    (Note for assembly) 3. Fusing section When removing the unit from the copier, ba careful not to scratch the photoconductor drum and the lower heat roller. Be careful not to 3-1. Fusing unit removal break the actuator of the paper exit sensor (POD). Open the front cover.

  • Page 54: Upper Separation Pawl Replacement

    3-4. Upper separation pawl replacement (Note for assembly) Assemble so that the lower separation pawl is on the upper side of Remove the fusing unit, and remove the cover. the lower heat roller. (At that time, return the separation pawl which Put the fusing unit so that the paper guide is on the lower side of was set upright in procedure (2).) the fusing unit (the separation pawl is on the upper side).

  • Page 55: Thermistor/Thermostat Removal

    3-7. Thermistor/thermostat removal Remove the fusing unit. Remove the fusing cover, and remove the thermistor/thermostat. Optical adjustment plate * Note for assembly • Check that the thermistor center is in contact with the heat roller. • Clean the thermistor surface with alcohol to remove foreign materials.
  • Page 56 B. Mirror base wire removal Remove the operation panel, the upper cabinet R, and the right cabinet. Remove the upper cabinet L, and the left cabinet. Remove the mirror wire spring from the groove on the left side of the optical base plate. Remove the dark box cover upper.
  • Page 57 Rotate the mirror base B counterclockwise to remove. Hook the metal fixture of the mirror base wire on the optical base plate hook. Disconnect the connector from the copy lamp unit on the rear frame side and from the No. 2/3 mirror unit. Pass the mirror base wire along the groove outside the double pulley.

  • Page 58: No. 2/3 Mirror Unit (Mirror Base B Installation (Mirror Base B Positioning)

    If the parallelism of the mirror base B is improper as shown in the figure below (one side of the mirror base B is in contact with the positioning plate and the other side is not in contact), perform the following procedure.

  • Page 59: Replacement

    4) Copy lamp unit installation (Mirror base A Remove the dark box cover upper. positioning) This adjustment must be performed in the following cases: • When the mirror base drive wire is replaced. • When the mirror base A or B is replaced. •...
  • Page 60 Remove the drive springs 4 and 5. Remove the drive shafts 4 and 5. * When removing the No. 4/5 mirror unit, remember the positions (scales) of the arrow marks of the drive holder 4 and 5. Zooming rack Remove the zooming rack of the roll holder unit. No.4/5 adjustment screw...

  • Page 61: Lens Wire Replacement

    6) Lens wire replacement Remove drive spring 4 and 5. A. Lens wire removal Remove the OR guide L and R, and remove the table glass. Remove the E-ring which is fixing the roll holder drive shaft, and remove the roll holder unit. Remove the dark box cover upper.
  • Page 62 2. Procedures Remove the drive wire spring and the wire hook from the lens carriage boss. Manually move the lens carriage unit to fit the lens carriage hole with the optical unit frame hole (which is not the home position L drive pulley hole but the reduction side hole).

  • Page 63: Lens Unit Replacement

    Manually turn the zooming can drive gear to fit the zooming cam Loosen the zooming cam screw, and fit the mark of zooming cam drive gear hole and No. 4/5 mirror drive unit base hole B. drive gear with the mark of No. 4/5 drive shaft. Zooming cam Hole Zooming cam drive gear...

  • Page 64: High Voltage Section

    5. High voltage section Remove the screw and remove the charging plate (saw teeth) ass’y. Clean the MC case, and the TC/SC case every 50K copies. Clean the screen grid, the charging plate (saw teeth), and the TC/SC wire every 50K copies, and replace them every 100K copies.

  • Page 65: Unit

    5-2. Transfer/separation charger (TC/SC) unit When installing the unit to the body, check that the grounding spring is in contact with the TC/SC case (metal section) on the Open the font cover, open the body up. rear and the front sides. (Visually check, and push the center of Push TC/SC unit pawl sections (2 positions) and lift the front the TC/SC unit to check that it can be moved up and down.)
  • Page 66 6-2. Waste toner bottle replacement (required when While pushing waste toner bottle in the direction of and lift it and remove. waste toner full detection/maintenance) Take out the process unit as shown above, <Note> If the unit is removed by holding the toner transport pipe, toner is spilled.

  • Page 67: Drum (Replace Every 50K Copies)

    6-3. Drum (Replace every 50K copies) 6-5. Discharge lamp unit (Clean every 50K copies.) Remove the process unit from the copier. (Refer to 6-1.) Remove three blue screws which are fixing the process unit holder, slide the holder and remove it. Loosen two blue screws which are fixing the drum, rotate the plate slightly to the right and pull it out.

  • Page 68: Developing Section

    6-6. Cleaner blade (Replace every 50K copies.) 7. Developing section Remove the holder from the process unit. (3 blue screws) A. DV side seals F/R replacement (Replace every 120K Remove the cleaning blade. (3 blue screws) copies.) Remove two screws which are connecting the hopper section and the developing unit, and separate them each other.

  • Page 69: C. V Ring Attachment

    B. DB blade replacement (Replace every 120K copies.) Remove the old DV blade from the DV cover. (Remove the duplex Plate MFE tape.) Attach the new DV blade with the pasteboard as shown below. (Attach the DV blade to the reference of A and the inscribed line 0.2).

  • Page 70: G. Developing Unit Color Identification

    G. Developing unit color identification 9. Frame major parts Color identification is made for different resistances of the developing unit. 9-1. Cooling fan motor replacement A. Cooling fan motor removal Vref (About 4.5) Remove the original cover, the original guide, the upper cabinet left, and the upper cabinet right.

  • Page 71: Power Unit

    B. Cooling fan motor 9-2. Power unit Remove the rear upper and lower cabinets. Label Remove two connectors, hold the PWB fixing bush with radio nippers and slide it toward the paper exit side to remove. Reverse the removal procedures. <Note>...

  • Page 72: Main Pwb Unit

    PWB and the copier chassis. Remove the process unit. Insert a screwdriver from the process unit position into the copier to push out the oZone filter. (SF-2020) Remove two screws which are fixing the AC power PWB, and remove the PWB.

  • Page 73: Multi Paper Feed Unit (Sf-Mf15: Option)

    10-2. Take-up roller/paper feed roller 10. Multi paper feed unit (SF-MF15: option) Remove the manual feed arm spring, the bearing stopper, and the 10-1. Separation roller E-ring. (At this time, slide the bearing from the guide section in advance.) Remove three screws and remove the paper feed/take-up roller Lift the manual feed stopper, and remove the manual feed shaft ass’y.
  • Page 74 11. ADU Remove the reverse roller. <Reverse roller> Remove the extension stopper, and remove the ADU from the copier. <Paper feed roller> Remove the four fixing screws (M4 × 8) of the ADU cover, and (Perform the same procedures for the take-up roller.) remove the ADU cover.
  • Page 75 (M3 × 6) of the paper exit plate spring. 12. Paper feed unit (SF-CM15, SF-CM16, option) This unit had two stages of paper feed section of the SF-2020 (one stage for the SF-CM16). For disassembly and assembly, refer to [5]-(1) Paper feed section.

  • Page 76: Adjustment

    [7] ADJUSTMENTS 1. Developing section 1-1. Developing doctor clearance adjustment Plate D a. If the clearance between the developing doctor and the MAG 0.6 ± 0.03mm roller is improper, the following trouble may occur. • Insufficient coy density MAG roller •...

  • Page 77: Optical System

    (5) Measure the distance from the marking position to the bottom (A) of the developing unit and check that the distance is 17.6mm. If the distance is not as specified above, loosen the MG adjustment plate fixing screw, move the adjustment plate in the arrow directions and perform procedures (3) to (5) again.

  • Page 78: Note For Adjustments

    2-2. Note for adjustments 1. Only the exposure balance adjustment, the blank lamp adjust- ment, and the copy lead edge adjustment can be performed individually. For the other adjustments, follow the flowchart below. 1. Mechanical reference position adjustment (without copying) A.

  • Page 79: Adjustment Of Each Section

    2-3. Adjustment of each section A. Lens reference position adjustment <Check after adjustment> Be sure to check that the magnification ratio cam is at the home In this model, the reference value according to each lens charac- position as shown in the figure below. teristics must be entered.

  • Page 80: Adjustment

    (3) Check to confirm the lens value specified on the lens value label. (4) Insert a screwdriver into hole (P) in the right rear side (paper feed side) of the optical base plate, and adjust the adjustment screw. The scale on the zoom base at section Q in the figure below determines the position of the No.
  • Page 81 (4) Calculate the copy magnification ratio. (9) Adjust the copy magnification ratio according to the flowchart Copy image size shown in (6). Copy magnification ratio = Original size × 100% (10) Make a copy at 50%. (5) Check that the obtained copy magnification ratio is within the (11) Check that the copy magnification ratio is within the specified specified range (100 ±...
  • Page 82 No.4/5 mirror adjustment screw (Copy) Check points 8. 0 9. 0 Perform the focus adjustment in the enlargement mode (200%). (1) Make a copy of the test chart on an A4 or 8 1/2″ × 11″ paper. (2) Check the resolution at the four corners and the center of the copy image.

  • Page 83: Adjustment

    E. Horizontal copy magnification ratio adjustment (2) Replace the displayed value with the copy magnification ratio correction rate obtained in (1). a. This adjustment is performed to meet the displayed magnifica- (Input value) = (Previously set value) / (Copy magnification tion ratio with the actual one.

  • Page 84: Simulation Input Values

    F. Comparison table of lens values and simulation input values Zoom correction Zoom correction Zoom correction Zoom correction Lens Lens (Enlargement) (Reduction) (Enlargement) (Reduction) display Sim 48-01 display Sim 48-01 Sim 48-01 — % Sim 48-01 — % — Sim 48-01 — % — Sim 48-01 —...

  • Page 85: H. Horizontal Skew Adjustment

    G. Vertical skew adjustment (4) Loosen the fixing screw of the rear frame side mirror base drive pulley. a. This adjustment is performed when a skew copy is made as When La > Lb, rotate the rear frame side mirror base drive shown below or when a part of the mirror base drive wire or the pulley in the arrow direction A.
  • Page 86 <Adjustment procedure> Adjustment procedure (1) (1) Make an original for adjustment. When La>Lb (Lc<Ld): Rotate to increase the height of the front Draw parallel lines at 10cm from the both edges of an A3 or frame side of the No. 4/5 mirror base unit. 11"...

  • Page 87: I. Center Shift Adjustment

    (Example) When La=12mm and Lb=9mm, shift the paper exit side (5) Remove the document reference plate and the right upper side mirror base B rail upward by 1.5mm. cabinet, and remove the document table glass. Document • When Lc > Ld, shift the mirror base B rail downward by half of reference plate the difference of Lc –...

  • Page 88: K. Copy Lead Edge Adjustment

    (3) Remove the original reference plate and the right upper side (The value displayed before pressing the % key is stored in the cabinet, and remove the original table glass. memory by pressing the zoom up key.) (4) Move the exposure plates a, b, c, and d in arrows directions A Display section: and B to adjust exposure.
  • Page 89 (8) Put a scale and an A3 (11" × 17") white paper on the original (4) Measure the distance between the copy paper lead edge and the copy image lead edge in each copy. Obtain RRC-A and table as shown below. RRC-B values from the following formulas.

  • Page 90: Original Detecting Section

    (11) Make a normal copy and check that the image loss and the [Adjustment procedure] void amount are within the specified range. (1) Put a scale on the original table. (Specified range) C → P → 0/◊ → P → 5 → Image loss: 0 ∼...

  • Page 91: B. Original Detecting Level Adjustment

    * The photo sensors are arranged as follows: B. Original detecting level adjustment (Original detecting judgement level input) Reception Japan shaft AB series AB series inch series This adjustment is to set the reference value for judgement of presence or absence of an original and to monitor the sensor —...

  • Page 92: Copy Density Adjustment

    2-5. Copy density adjustment (2) Drum sensitivity setting (1) Execute Sim. 26-07, and check that the top digit of the 9-digit A. When the copy density adjustment is required: drum number printed on the flange in front of the drum is dis- played on the copy quantity display.
  • Page 93 (2) Make a copy. (4) Test chart setting Check that "6" of the test chart is slightly displayed. (1) Put several sheets of white paper (Sharp specified paper) of about 120mm wide and about 420mm long to the center refer- ence.
  • Page 94 (2) Perform the same procedures of (2) through (4) in "1) Normal (4) Make a copy. mode exposure adjustment." Check that "3" of the test chart is slightly copied. 3) Photo mode exposure adjustment (1) Press the exposure select key to set to the photo mode. The photo mode lamp is lighted and exposure "1"...
  • Page 95 Test chart comparison table UKOG-0162FCZZ DENSITY No. UKOG-0089CSZZ DENSITY No. KODAK GRAY SCALE SHARP CORPORATION MADE IN JAPAN Copy density adjustment Developing bias output voltage adjustment 200V (Manual exposure 1) Execution of Sim. 8-01 Manual exposure copy density adjustment Execution of Sim. 46-01...
  • Page 96 Item Content Automatic exposure copy density adjustment Enter "0" with the 10 digit key pad. Normal mode Not copied Slightly copied TSM mode Enter "0" with the 10 digit key pad. AE1 (TS) AE5 (TS) Not copied Slightly copied 2-6. Process section adjustment B.
  • Page 97 5 Attach the process unit to the copier. (Attach so that the electrode A. Use of special measurement tools sheet lead wire extends from the developing unit side.) • Tool: UKOGE0043CS01 (Digital multi meter) 6 Clean the transfer charger wire, and attach the transfer/separation •...
  • Page 98 –480 –480 –630 –650 * Drum marking number 1 = SHARP Drum marking number 2 = Mitsubishi * This model performs the process correction according to the num- ber of drum mark(s). With Sim 8, the grid voltage after correction can be checked.

  • Page 99: Simulations

    2. Purpose [8] SIMULATION The purpose of the simulations feature is to improve serviceability in repairs and adjustments. Since the mechanical adjustments can be performed electrically, the 1. Outline above purpose is achieved with low costs. This model is equipped with the simulations feature which allows the following operations with the keys on the operation panel: 3.

  • Page 100: List Of Simulations

    4. List of simulations Main Main Content Content code code code code Mirror scanning Maintenance counter display Optical system sensor check Maintenance preset counter display Lens operation check JAM memory display Lens operation aging Total JAM counter display ADF aging Total counter display ADF sensor check DV counter display...
  • Page 101 *1 (Simulation 26-6 Destination setting) Set value Model (Destination) Set value Model (Destination) Japan EX inch series EX AB series SECL EX inch series (for FC) SEEG EX AB series (for FC) Taiwan/China Cassette size switch table Inch series AB series Inch series (For FC) AB series (For FC) Taiwan/China...

  • Page 102: Details Of Simulations

    5. Details of simulations Simulation input procedure: C → ë → 0 → ë Main code Sub code Content Mirror operation check When the print button is pressed, the mirror is scanned at a speed corresponding to the currently set copy magnification ratio.
  • Page 103 Main code Sub code Content ADF individual load operation check (paper feed motor + paper feed solenoid) ADF individual load operation check (transport motor forward rotation + repulsion motor forward rotation) A57 only Sorer sensor state display The ADF sensor ON/OFF states can be monitored with the LED on the operation panel. When the third digit of the multi display is “A,”...
  • Page 104 Main code Sub code Content DL lamp lighting check The discharge lamp is lighted for 30 sec. BL lamp lighting check The blank lamp is turned on/off every 0.5 sec. PSPS operation check The separation pawl is turned on/off 30 times in the following sequence. PSPS 0.5s 0.5s...
  • Page 105 Main code Sub code Content ADU rear edge plate aging (SF-2120 only) The rear edge plate is returned to the initial position and shifted to the following size positions. AB series Home position Inch series Home position AB series foolscap area Home position Inch series foolscap area Home position...
  • Page 106 Main code Sub code Content Maintenance cycle setting Used to set the lighting cycle of the maintenance lamp (è). When this simulation is executed, the currently set maintenance cycle is displayed on the copy quantity display. After setting the number, press the print button to memory the value. Set value Maintenance cycle ←...
  • Page 107 Main code Sub code Content Jam memory/total jam counter clear The cause (position) of a jam which occurred during copying and the jam total counter are cleared, and the jam total counter value is displayed on the copy quantity display. (“000” is displayed because the counter is cleared.) Trouble memory clear The main code and the sub code of a trouble is cleared.
  • Page 108 Main code Sub code Content Destination setting Used to set the destination (Japan, SEC, etc.). When this simulation is executed, the currently set destination is displayed on the copy quantity display. Enter the set value and press the PRINT button to store it. Set value Destination Japan...
  • Page 109 Jam lamp (ê) Paper exit position jam lamp ( ) ← SF-2120 only POD2 ADU position jam lamp ( ) ← SF-2020 only PED1 Body upper step tray selection lamp ( ) PED2 Body lower step tray selection lamp PED3...
  • Page 110 Main code Sub code Content Original sensor check Used to display the judgement result of the original sensor on the operation panel LED. The original sensor values are read sequentially. If the sensor is interrupted (judged as presence of an original), the LED corresponding to the sensor position is turned on.
  • Page 111 Main code Sub code Content (Note) Developer counter clear Used to clear the currently installed developing unit counter and to display the developer counter value on the copy quantity display. (“000” is displayed because the counter is cleared.) (Note) The counter is cleared by entering the sub code “01.” Fusing temperature setting Used to set the fusing control temperature.
  • Page 112 Main code Sub code Content Grid voltage correction compulsory execution The grid voltage correction is forcibly executed during the simulation. When the operation is completed, the patch forming grid voltage after grid voltage correction is displayed on the copy quantity display. The relationship between the display value and the patch forming grid voltage value is as shown below.
  • Page 113 Main code Sub code Content Grid voltage correction, optical dirt correction, drum membrane decrease correction data display Used to display each correction data of the grid voltage correction, the optical dirt correction, and the drum membrane decrease correction on the copy quantity display. Since there are two or more display items, the third digit is used to make distinction between the light reception level and the original judgment level, and the lower two digits are used to display the data.
  • Page 114 Main code Sub code Content Drum voltage correction drum surface data, patch data display Used to display the drum surface data and the patch data after execution of the grid voltage after simulation 44-5, 6 or during normal operation is displayed on the copy quantity display. Since there are two or more display items, the third digit is used to make distinction between the light reception level and the original judgment level, and the lower two digits are used to display the data.
  • Page 115 Main code Sub code Content Exposure level adjustment Used to set the copy density (copy lamp output voltage) in each exposure mode. When this simulation is executed, warm-up is started and the currently set manual (ME) upper limit value is displayed on the copy quantity display.
  • Page 116 Main code Sub code Content Paper transport direction magnification ratio adjustment Used to set the horizontal (paper transport direction) magnification ratio. When this simulation is executed, warm-up is started and the currently set mirror speed correction value is displayed on the copy quantity display. When warm-up is completed, the ready lamp is lighted.
  • Page 117 Main code Sub code Content Resist amount adjustment Used to set the warp amount of paper in the resist section. When this simulation is executed, warm-up is started and the currently set tray resist amount is displayed on the copy quantity display. After completion of warm-up, the ready lamp is lighted.

  • Page 118: User Simulation

    Main code Sub code Content ADF timing sensor adjustment When this simulation is executed, the paper exit reverse sensor original judgement level is adjusted. After completion of this adjustment, the original judgement level is displayed on the copy quantity display. Display range: 0 ∼...

  • Page 119: User Simulation

    (2) User simulation Paper jam/Maintenance/ Copy Copy Mini maintenance/ Simulation procedure State quantity button Paper supply/Toner supply/ display Warning LED 1. Press the tray selection User simulation input is allowed. Blink key for 5 sec or more. 2. Enter the simulation code Selection of simulation code No.

  • Page 120: Self Diagnostics

    [9] SELF DIAGNOSTICS 1. Summary/purpose This model has the self diag function for the following purposes: 1) When a trouble occurs in the machine, the machine detects the trouble and displays the trouble content on the copy quantity dis- play to alert the customer and the serviceman. 2) When any abnormality is detected, the power supply line is cut off immediately for safety and to protect the machine from damage.
  • Page 121 Trouble code Sub code Content Condition • Mirror feed trouble When initializing, MHPS is not turned off within 1.5 sec from starting feeding of the mirror. • When copying, MHPS is not turned off within 0.5 sec from starting feeding of the mirror. •...
  • Page 122 Trouble code Sub code Content Condition • Sorter communication error An error occurred in communication between the sorter and the main unit. • Transport motor trouble During rotation of the transport motor, the rotation pulse is not sensed for 0.5 sec or more. •...

  • Page 123: Main Control Pwb

    [10] SERVICING AT MEMORY TROUBLE AND MAIN CONTROL PWB RE- PLACEMENT 1. General 2. Purpose The EEPROM in the control PWB and the EEPROM are storing The purpose is to reset the memory data to operate the machine various set values, adjustment values, and counter values. properly.
  • Page 124 Is the toner Use Sim 25-2 to set the density reference value Make a copy and adjust the toner density reference value Is the adjustment recorded? value of contact pressur contact pressure between between the main body resist the main body resist roller roller and the copy paper and the copy paper recorded?

  • Page 125: Set Value Recording Sheet

    4. Set value recording sheet Memorize set values in the column of "Set value" for efficient servicing when the memory trouble occurs and the EEPROm is replaced. Make a copy of this sheet and use with the service sheet. Contents Purpose/kind Section Main code...

  • Page 126: Memory Simulation List

    5. Memory simulation list Contents Purpose/kind Section Ref. page Main Default Description code code value Paper feed Adjustment value of contact pressure of the paper on the main 8-19 section body resist roller Copy paper lead edge void amount adjustment 8-18 (Resist adjustment A) Copy paper lead edge void amount adjustment...

  • Page 127: Maintenance Cycle And Maintenance Items

    [11] MAINTENANCE 1. Maintenance cycle and maintenance items Maintenance of the SF2116/2118/1016/1018 should be performed at every 50K. <Content> = Lubricate, F = Clean, v = Adjust, b = Replace/attach, ê = Shift position = Check (Clean, replace, or adjust if necessary.) * The toner consumption and the waste toner bottle replacement cycle are those when the reference chart is used.

  • Page 128: Electrical Section

    [12] ELECTRICAL SECTION 1. System block diagram 12 – 1...
  • Page 129 System operation when the power is turned on: Power ON Initial setting Memory transfer Trouble Warm up Heater lampp ON Mirror initial operation Lens initial operation End of warm up Racing Process contorol Toner density control End of racing RPL ON PSW ON RPL OFF Copy cycle...
  • Page 130 BL-DATA BL-DATA VREF VREF PROCON PCG MCG AEG0, AEG1 MMPWM DATA0 FWS, RTH 12 – 3...

  • Page 131: Cpu (Ic6) Sc3041K12F

    (2) CPU (IC6) SC3041K12F General The CPU controls the loads of the main body and controls the system in synchronization with data transmission and reception through the optional controllers and serial data communication line. Features The SC3041K12F is a high performance single-chip micro computer which is integrated with the necessary peripheral devices as well as the main core of 32-bit H8/300H CPU.
  • Page 132 Internal block diagram Port 3 Port 4 Address bus Address bus (Upper) Address bus (Lower) PS3/A19 PS2/A18 PS1/A17 EXTAL PS0/A16 XTAL Φ HS/300H CPU STBY RES0 P27/A15 Interruption P26/A14 controller P25/A13 P66/LWR P24/A12 P65/HWR contorller P23/A11 P64/RD (DMAC) P22/A10 P63/AS P21/A9 ROM* P62/BACK...
  • Page 133 CPU SC3041K12F (IC1) pin signal Pin No. Port Signal name IN/OUT Specifications Power (+5V) CVFMPWM Fan motor (PWM output) signal Serial clock signal for EEPROM MMPWM Main motor (PWM output) signal Serial data for EEPROM /MIR-A Mirror base motor drive signal -A MIR-A Mirror base motor drive signal A /MIR-B...
  • Page 134 Pin No. Port Signal name IN/OUT Specifications Address signal Address signal LHPS Lens home position signal (LOW at 100%) Transport pass sensor signal (HIGH when paper is sensed.) Drum marking sensor signal Power (GND) DATA0 Matrix input 0 (LSI51) DATA1 Matrix input 1 (LSI51) DATA2 Matrix input 2 (LSI51)

  • Page 135: I/O (Ic8) Cxd1095Q

    (3) I/O (IC8) CXD1095Q Pin arrangement General I/O converts data (command) from the CPU into control signals. The CXD1095Q is a general-purpose interface element, and has 4.5 sets of 8-bit I/O ports to allow setting of input and output operations of parallel data by the program or the hardware.
  • Page 136 Internal block diagram DATA LATCH LATCH LATCH LATCH LATCH DATA SELECT CONTROL ODEN I/O: CXD1095Q (IC8) pin signal Signal Pin No. Port IN/OUT Specifications name Option receive allow signal SRES Option reset signal Total counter control signal Transport clutch control signal Resist roller clutch control signal Power relay control signal DVBIAS...
  • Page 137 Signal Pin No. Port IN/OUT Specifications name CPFC1 Tray 1 paper feed clutch control signal CPEC2 Tray 2 paper feed clutch control signal CPFC3 Tray 3 paper feed clutch control signal CPFC4 Tray 4 paper feed clutch control signal CS2M Tray 2 motor control signal CS3M Tray 3 motor control signal...

  • Page 138: Detector Circuit Of Sensor Signal

    (4) Detector circuit of sensor signal The LS151 selects one signal of D0 ∼ D7 according to the combina- SEL B tion of SEL A ∼ C signals (H, L) and outputs it to Y. Selection of D0 ∼ D7 for SEL A ∼ C is made as shown in the table CSD1 below.

  • Page 139: Heater Lamp Control Circuit

    (6) Heater lamp control circuit +5V1 R7 1 47KJ R7 5 IC20D 2SC945 OP-LATCH NJM2901 CPU 17PIN R6 8 24KJ 0.22µ F 5.6KJ 10KJ 0.22µ F Vref 8.2KJ 4.7KF D3 8 IC20C MA700 NJM2901 R9 2 680J DSM101 22000PF 47KF 8 ~ 20 2SA573 R5 3...

  • Page 140: Stepping Motor Drive Circuit

    [When the heat roller surface temperature is lower than the set (8) Stepping motor drive circuit temperature] General a. Since the thermistor pin voltage is higher then the set level, the The driver circuit drives the lens drive motor, the mirror base drive output signal HL from the CPU is driven to LOW.

  • Page 141: Ae (Auto Exposure) Sensor Circuit

    (9) AE (Auto Exposure) sensor circuit The AE sensor circuit is composed of the AE sensor PWB; which is composed of the photo diode, the I-V convertor circuit, and the amplifier circuit; and the amplifier circuit on the control PWB. +24V 100KJ 0.1µ...

  • Page 142: Operation Panel

    Operation • When "td" (= 30msec) passes after the voltage reaches 4.25V by turning on the power, the output is drive to HIGH. "td" is set by the external capacitor (C106). Block diagram Power 5µA reference Output 1.25V Delay capacity 4.25V 0.65V Output not constant...

  • Page 143: Energystar Circuit Description

    (13) EnergyStar circuit description The EnergyStar circuit composition saves power consumption when When the machine is left un-operated with the power ON, the main the user leaves the machine with the power ON. PWB connector HL signal level becomes a high impedance to turn off Normally in a copy mode or in the standby mode, the main PWB the AC PWV relay (RY201), stopping power supply to the power connector HL signal is HIGH (5V) and the AC PWB relay (TY201) is...

  • Page 144: Adu Circuit Description

    (14) ADU circuit description (1) ADU circuit block diagram 12 – 17...
  • Page 145 (2) ADU CPU (IC1) 1. Outline The CPU controls the loads of the ADU unit and performs data trans- mission through the copier main PWB and the serial data line to make synchronization with data transmission to control the ADU unit. 2.
  • Page 146 4. Pin arrangement (FP-64A: Top view) P50/TXD P10/A0 P51/RXD P11/A1 P52/SCK P12/A2 P13/A3 P14/A4 P15/A5 STBY P16/A6 P17/A7 FP-64A XTAL EXTAL P20/A8 P21/A9 P22/A10 AVSS P23/A11 P70/AN0 P24/A12 P71/AN1 P25/A13 P72/AN2 P26/A14 5. ADU PWB Port List Used Used Sig. Name I/O Active Note Sig.
  • Page 147 Used Sig. Name I/O Active Note Port Stepping motor time chart 42 A6 Address signal 43 A5 Address signal 44 A4 Address signal 45 A3 Address signal 46 A2 Address signal 47 A1 Address signal 48 A0 Address signal 49 D0 Data signal 50 D1 Data signal...
  • Page 148 SPM2 A PAM1 A CNB-13 SPM2-A PAM1 /A CNB-11 SPM2 B PAM1 B CNB-9 SPM2-B PAM1 /B CNB-7 10KJ uLN2003A 1/4W 24KJ 1SS133 2SC1740S 2.7KJ 2SC1740S 2.7KJ 10KJ 10KJ 2SC1740S 1SS133 2.7KJ 24KJ 10KJ 2SC1740S 2.7KJ 10KJ 6.2KJ 1/2Wx2 125V 1.6A SLA4391 250V T1.6A SIG1...

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Sf-2120

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