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Sharp SF-2014 Service Manual

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Table of Contents
SF-2014
[ 1 ] GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
[ 2 ] PRODUCT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
[ 3 ] EXTERNAL VIEW AND INTERNAL STRUCTURE . . . . . . . . . . . . . . . . . . . . . . . 3-1
[ 4 ] UNPACKING AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
[ 5 ] GENERAL DESCRIPTIONS OF EACH SECTION . . . . . . . . . . . . . . . . . . . . . . . 5-1
[ 6 ] DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
[ 7 ] ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
[ 8 ] SIMULATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
[ 9 ] SELF DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
[10] SERVICE AT MEMORY TROUBLE AND
[10]
MAIN CONTROL PWB REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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

MODEL
MODEL
SF-2114
MODEL
Options
SF-2214
CONTENTS
SHARP CORPORATION
CODE: 00ZSF2214SMRE
SF-2014
SF-2114
SF-2214
Paper tray (SF-UB14)
Multi paper feed unit (SF-MF14)
Paper feed unit (SF-CM14)
Copier table (SF-720D2)
Personal counter (SF-71A/71B)
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-2014

  • Page 1: Service Manual

    SERVICE MANUAL CODE: 00ZSF2214SMRE SF-2014 MODEL SF-2114 MODEL SF-2214 SF-2114 MODEL Options Paper tray (SF-UB14) • Multi paper feed unit (SF-MF14) • Paper feed unit (SF-CM14) • SF-2014 Copier table (SF-720D2) • Personal counter (SF-71A/71B) • SF-2214 CONTENTS [ 1 ] GENERAL DESCRIPTION ......... . 1-1 [ 2 ] PRODUCT SPECIFICATIONS .
  • Page 2: Table Of Contents

    CONTENTS [ 1 ] GENERAL DESCRIPTION (7) Lens drive shaft ..... . .5-4 ....1-1 (8) Lens drive wire .
  • Page 3 5-2. Paper feed roller/takeup roller replacement ..6-14 1. Outline ........8-1 5-3.
  • Page 4: General Description

    250 sheets No.2 cassette unit (Option) Zooming range 250-sheets paper tray (1:1) SF-2014 (SF-UB14) Single manual feed (Standard) 250-sheet tray 50-sheet multi manual feed unit (SF-MF14) (Option) * As the other options for all the modeks, the desk (SF-720D2) and the personal counter (SF-71A/71B) are available.
  • Page 5 1 – 2...
  • Page 6: Product Specifications

    Lead edge loss 3.0mm or less 2.5mm or less 5.0mm or less (1) Type: Table top (2) Copy speed (11) Paper exit • SF-2014 Paper exit tray capacity 100 sheets Paper size Normal Enlargement Reduction (12) External demensions 11 sheets/min —...
  • Page 7 • Inch series (5) Fuser section Paper feed Fusing system Heat roller system Paper feed size Paper weight Special paper port Upper heat roller surface 180˚C Tray 15 21 lbs Recycled paper temperature invoice Heater lamp 100V Halogen lamp 1000 W 1 pc.
  • Page 8: Supplies

    3. Supplies USA, Canada Item Contents Life Model name Packing unit • OPC Drum Cartridge OPC Drum Cartridge SF-214DR • OPC Drum Kit OPC Drum SF-214DK1 • Cleaner Blade • Black Toner Black Toner Cartridge SF-214NT1 • Black Developer Black Developer Cartridge x 10 SF-214MD1 (SF-214ND1 x 10)
  • Page 9 COMPATIBILITY TABLE OF OPC DRUM UNIT TYPE COLOR OF DRUM FLANGE MODEL NAME LIFE OPC DRUM EEPROM DESTINATION CURA BLACK SF-DR14 HANDRING BY SERVICEMAN INSTALLED JAPAN CRUB BLACK SN-142DR HANDRING BY CUSTOMER INSTALLED North America (SN Series) CRUC BLACK ZT-80DR HANDRING BY CUSTOMER INSTALLED North America (Z Series) SRUA...
  • Page 10: External View And Internal Structure

    [3] EXTERNAL VIEW AND INTERNAL STRUCTURE 1. External view and internal structure (SF-2214 as the example model) Upper unit Lower unit Name Name Name Exit tray SPF exit tray SPF tray Document cover Original guide Document table Manual bypass guide Manual bypass Operation panel Paper tray...
  • Page 11: Operation Panel

    2. Operation panel SF-2014 POWER SAVE EXPOSURE TRAY SELECT AUTO MANUAL PHOTO 15 16 17 SF-2114 POWER SAVE EXPOSURE TRAY SELECT COPY RATIO 129 % 5½ 8½ 5½ 8½ ZOOM AUTO 117 % 8½ 11 10 14 MANUAL 100 %...
  • Page 12: Cross Section (Sf-2214 As The Example Model)

    3. Cross section (SF-2214 as the example model) 10 11 12 13 14 15 16 17 18 19 20 Name Name Name No.3 mirror No.2 mirror SPF transport follower roller SPF transport roller SPF document exit roller SPF PS roller upper SPF PS roller lower SPF document feed reverse roller SPF document feed roller...
  • Page 13 4. Switches, sensors, detectors (The SF-2214 as the typical example) Abbreviation Function Type Operation Paper out sensor Transmission photo sensor H when paper is sensed. MHPS Mirror home position sensor Transmission photo sensor H at the home position. SDSW SPF cover open/close sensor Lead switch H when the cover is open.
  • Page 14 5. Clutches, solenoids (The SF-2214 as the typical example) Abbreviation Name Function and operation SRRC SPF resist roller clutch For SPF resist roller rotation SPF document transport clutch For SPF transport roller rotation PSPS Paper separation solenoid For paper separation solenoid drive Resist roller clutch For resist roller rotation Transport roller clutch...
  • Page 15: Optical System

    6. Motors (The SF-2214 as the typical example) Abbreviation Name Function Type For ventilation of the fuser unit. Paper exit fan motor DC brushless For cooling the machine and removing ozone. SPFM SPF motor For SPF drive DC brushless Cooling fan motor For cooling the optical system DC brushless Main motor...
  • Page 16: Pwbs (The Sf-2214 As The Typical Example)

    7. PWBs (The SF-2214 as the typical example) Name Description AC circuit PWB AC power input Discharge lamp PWB Discharge lamp drive Main PWB Main body control AE PWB Document density auto exposure detection Blank lamp PWB Blank lamp control Lower unit PWB Lower unit parts control High voltage PWB...
  • Page 17: Unpacking And Installation

    List of packing materials and accessories [4] UNPACKING AND INSTALLATION Name Q’ty Packing case 1. Packing drawing SPF tray SPF cover protection material Body Polyethylene bag for paper exit tray Vinyl sheet for body Bottom case Bottom case pad (L) Bottom case pad (R) AC cord sleeve Paper exit tray...
  • Page 18: Space Around The Machine

    2 Avoid installation in high temperature or high humitity envi- 5 Install in a well ventilated place. ronments. Also, avoid installation where temperature or hu- midity may change quickly. (e.g., near an air conditioner). Otherwise copy papers may be dampened and condensation may be generated in the machine.
  • Page 19: Power Source

    Set the copy papers in the cassette. Do not exceed the limit line 2 Unlock the No.4/No.5 mirror unit. indicator. [In the case of SF-2014] Remove the No.4/No.5 mirror unit fixing screws (2 pcs.) on the right side of the copier.
  • Page 20: Developer Setting

    Gently insert the cassette fully into the copier. 4 Supply developer. Press and hold the developer cartridge in place and remove the developer cartridge sheet by pulling forcefully. (Developer will be supplied.) (3) Developer setting Sheet 1 Open the front cabinet. Press the front cabinet open buttons in the right and the left sides (4) Toner supply of the copier, and open the front cabinet.
  • Page 21: Toner Density Sensor Level Check

    Turn the toner cartridge counterclockwise to lock it in position (6) Accessory attachment 1 Attach the copy tray. 4 Supply toner. Remove the toner cartridge sheet and supply toner. 2 Attach the document tray. (Toner will be supplied.) Return the toner cartridge to the original position and close the [SF-2214 only] front cabinet.
  • Page 22: No.4/No.5 Mirror Unit (Mirror Base C) Lock

    1 Perform locking with the unit at its home position and with the For use with compatible SHARP copies. external fitting installed. See SHARP copier Installation Manual to determine suitability. 2 Lock the unit with two mirror unit fixing screws. (The hole in the Included parts...
  • Page 23 (2) Remove the paper tray from the main copier Upper unit unit. 1 While lifting up slightly, gently pull out on the paper tray until it stops. 2 Then, lift up on the paer tray with both hands and remove it. (4) Connect the main copier unit and the paper feed unit.
  • Page 24: Installation Manual

    For use with compatible SHARP copiers. feeder unit in to the grooves in the main copier unit, then push the See SHARP copier Installation Manual to determine suitability. multi bypass feeder unit into place to in stall it. At this time, to be sure that the multi bypass feeder unit is securely installed, push down once more on the fourcorners of the unit.
  • Page 25: General Descriptions Of Each Section

    [5] GENERAL DESCRIPTIONS OF EACH SECTION The general descriptions of the following sections are given: 1 Paper feed section 2 Separation, transport section 3 Fuser, paper exit section 4 Developer section When the CPCF turns off, rotation is stopped, and the takeup roller is 5 Optical system pushed up by the roller release arm spring to the position.
  • Page 26: Separation, Transport Section

    2. Separation, transport section 4. Developer section After passing the resist roller section, the paper is transported to the 1 When machine has low toner (low concentration) conition, Toner transfer section. After transfer, the paper is separated from the drum and Carrier (Developer) are transported from toner box to devel- by the separation electrode and the drum separation pawl, then trans- oper box by mixingroller.
  • Page 27: General Descriptions

    PWB to allow zooming of 0.70 to 1.22 (inch series: 0.64 1.29) with 1% increment. (The SF-2014 has no zooming function, and its lens and No.4/No.5 mirror base are fixed.) Copy lamp Reflector No.
  • Page 28: Lens Drive Shaft

    (7) Lens drive shaft 5-2. Basic operations This shaft is to control the optical axis of the lens in zoom copying. (Relationship among the original, the lens and the image in each The lens follows on the slide base shaft. magnification ratio) Normal copy: The distance between the surface of original on the (8) Lens drive wire...
  • Page 29 (Optical system dirt correction) The mirror base scan speed (mirror motor rpm) The SF-2014/2114/2214 perform dirt correction by changing the copy is changed to zoom. lamp intensity 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 remarkable degrading of copy quality.
  • Page 30: Copy Process

    6. Copy process (1) Photoconductor • This model uses OPC (organic photoconductor) as photoconduc- tive material. OPC layer CTL (Electric charge moving layer) CGL (Electric charge generating layer) Aluminum layer (2) Process diagram Original Mirror lens Copy lamp High voltage unit Main corona unit Charging Exposure...
  • Page 31: Actual Process

    (3) Actual process Step 1 (charging) The OPC drum is negativelycharged by corona discharge of the transfer charger . Positive charges are generated in the aluminum layer. Aluminum layer Blank lamp Main corona unit OPC drum Discharge lamp Developer unit Cleaning blade MG roller Seperation pawl...
  • Page 32 Step 3 (Main Charging) By negative discharging of the main charger, uniform negative charges 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 33 Low intensity in HIgh intensity in Medium intensity the area corre- in the area corre- the area corre- sponding to the sponding to the sponding to the darker density medium density lighter density of portion of the portion of the the document document document...
  • Page 34 Step 6 (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 35: Potential

    Step 8 (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 36: Process Correction System

    (5) Process correction system 1) Outline of the correction system This model is provided with the correction system for the optical unit and the photoconductor drum unit. The combination of the two cor- rection systems provides stable clear copy. These functions are to maintain the copy quality for a long time and to correct the characteristics of the parts, and are controlled by the software and invisible from the outside.
  • Page 37 2. Optical unit correction (Dirt correction) Referance refrection plate Table glass Diagram of correction system in the optical section AE sensor (Next to the lens) Referance refrection plate Mirror AE SENSOR Copy lamp MAIN CONTROL PWB EE-PROM Timer Copy lamp Arithmetic unit referance control converter...
  • Page 38: Spf Section (Sf-2214 Only)

    Original transport path and the basic composition 7. SPF section (SF-2214 only) 1. Outline The SPF (Single pass feeder) is a standard provision of the SF-2214, and allows automatic copying of max. 20-sheet documents (of the same size and max. thickness of 3 mm). (Only one set of copies per run) Original takeup roller SPFD...
  • Page 39 5 – 15...
  • Page 40: Disassembly And Assembly

    2 Disconnect the CN-B connector of the lower PWB, remove the [6] DISASSEMBLY AND ASSEMBLY paper feed unit fixing screws (4 pcs.), and lift the paper feed unit to remove. The descriptions of this chapter are divided into the following sec- tions: 1.
  • Page 41: Separation Roller

    4 Remove the bearing in the rear frame and remove the paper feed 1-3. Separation roller roller ass’y. 1 Remove the paper feed unit and remove the separation roller. Note for assembly (1): Hang the roller release arm spring on the spring hook of the roller release arm.
  • Page 42 Note for assembly (1): Attach the paper feed roller so that the 3 Remove the clutch, and the gear as shown below: one-way clutch in the rear frame side. (Be careful to the installing direction.) Attach the roller holder as shown below: One-way clutch side Note for assembly (1): When assembling, attach the positioning pin of the resist roller clutch in the direc-...
  • Page 43: Transport Belt

    1-6. Transport belt 1-8. Lower unit PWB 1 Remove the fuser unit. 1 Open the body up, and remove the rear lower cabinet. 2 Remove the TC case. 2 Remove the connector, the PWB fixing screw (1 pc.), and the CN-F fixing screws (2 pcs.).
  • Page 44: Manual Paper Feed Section

    Note for assembly (1): When attaching the harness, be careful to 4 Remove the manual arm and the E-ring, and remove the manual the connector color and the lead wire paper feed roller. color. (Carefully refer to the indication on Note: Gear 20T has a positioning pin.
  • Page 45: Fuser Section

    8 Remove an E-ring and two connectors. 3. Fuser section 3-1. Fuser unit removal Open the front panel Remove the table glass. 3 Turn the open/close lever to the right and open the upper unit slowly. 4 Remove the connectors (2 pin 2), slightly lift the right side of the unit and pull it out.
  • Page 46: Upper Heat Roller Ass'y Removal

    3-3. Upper heat roller ass’y removal 3-5. Lower cleaning roller and lower heat roller replacement 1 Remove the bearing fixing screws (2 pcs.) in the front and the rear frames. 1 Remove the fuser unit. 2 Put the paper guide to the paper exit side and separate the sepa- 2 Remove the CL roller springs (2 pcs.) which is fixing the lower ration pawl from the roller and fix it.
  • Page 47: Scraper Replacement

    3-6. Scraper replacement 3-7. Thermistor/thermostat removal 1 Remove the upper fuser unit. 2 Remove the paper exit paper guide fixing screw (step screw) in Press this projection to desassemble the front frame side, and remove the paper exit paper guide. Paper exit paper guide 3 Remove the scraper hook section from the paper exit paper guide, and remove the scraper.
  • Page 48: Copy Lamp Replacement

    4-2. Copy lamp unit replacement 4. Optical system 1 Remove the manual paper feed unit, the right upper cabinet, the glass holder, the table glass, and the operation panel. 4-1. Copy lamp replacement 2 Move the copy lamp unit to the frame notch (refer to the figure). 1 Open the body up.
  • Page 49 Note: After replacement of the mirror base drive wire, perform the vertical skew copy adjustment, the focus adjustment, and the horizontal skew copy adjustment. 4-4. Lens and lens drive wire replacement (Only the zoom function model) <Removal> 1 Remove the manual paper feed unit, the right upper cabinet, and the table glass.
  • Page 50: Optical Unit Removal

    Note: When the lens drive wire is removed, the magnification adjust- 4-6. Optical unit removal ment and the focus adjustment are required. 1 Remove the drum unit and the developer unit. 2 Remove the right cabinet, the left cabinet, the operation panel, the 4-5.
  • Page 51: Removal

    3 Remove the connector and the fixing screw (1 pc.), and remove 4-8. Light adjustment plate/temperature fuse the mirror home position sensor (MHPS) towards the rear frame. removal 4 Remove the connector and the fixing screw and pull out the lens 1 Remove the document glass.
  • Page 52: Spf Section

    4 Remove the SPF motor ass’y fixing screws (4 pcs.) and the CN-C 5. SPF section connector (4 pin) of the SPF control PWB. Then remove the SPF motor ass’y. 5-1. SPF mechanism removal 1 Open the OC cover, and remove the SPF cover fixing screws (5 pcs.).
  • Page 53 5 Remove four screws from the SPF mechanism, the 2-pin connec- 3 Remove the E-rings (3 pcs.), slide the gear to the clutch once, and tor from the clutch, the 2-pin connector from the SPF cover pull out the pin inside the gear. Then the gear and the paper feed open/close sensor, the CN-C (16-pin) connector from the SPF roller can be removed.
  • Page 54: Clutch/Solenoid Removal

    5-4. SPF control PWB replacement 1 Remove the SPF upper cover as shown in "5-1- ." 2 Remove three connectors and two screws from the SPF control PWB and remove the PWB. 5-6. Sensor removal 5-5. Clutch/solenoid removal 6 – 15...
  • Page 55: Developer Cartridge Removal

    7. Developer section 7-1. Developer unit removal 1 Open the front cover. 2 While pressing down the release lever, open the toner cartridge slowly and remove it. 3 Loosen the step screw 4 Pull out the developer unit. 6. Drum section 6-1.
  • Page 56 2 As shown in the figure below, open the section which is pressing 7-4. Toner density sensor the cartridge pawl with a screwdriver, and pull out the developer cartridge. 8. Operation panel section/medium 7-3. Toner motor removal cabinet 1 Remove four short screws and one long screw , and the connector, and separate the toner cartridge section.
  • Page 57: Ventilation Fan Motor

    9. Major parts in the frame side 9-1. Ozone filter 1 Remove the document glass. 2 Remove the black sheet and remove the ozone filter. 9-3. Ventilation fan motor 1 Remove the optical unit. (For details, refer to "4. Optical unit re- moval.") 2 As shown in the figure below, remove the ventilation fan motor.
  • Page 58 9-4. Transport roller clutch 1 Remove the rear cabinet. 2 Remove the transport clutch as shown in the figure below. 9-5. Paper exit sensor 1 Open the front panel. 2 Move the open/close lever to the right and open the upper unit slowly.
  • Page 59: Adjustments

    Tie a string to a needle as shown in the figure below. [7] ADJUSTMENTS Hold the string and move the needle to the MG roller. Mark the point where the needle makes contact with the MG The descriptions of this chapter are divided into the following sec- roller.
  • Page 60: Roller

    (2) Adjustment of clearance between DV doctor Press the DV doctor in the arrow direction and tighten the DV doctor fixing screw. and MG roller Check that the clearance of the DV doctor is 0.6 0.03mm in the If the clearance between the DV doctor and the MG roller is improper, range of 30mm width under the DV doctor fixing screw.
  • Page 61: A. Adjustments List

    2. Optical section A. Adjustments list Adjustment Necessary Ref. Classification Adjustment content value/Standard special tool page value Parts installation Lens Lens unit right angle adjustment — — position Mirror No.4/5 mirror unit right angle — — adjustment No. 4/5 mirror unit drive cam position —...
  • Page 62 (3)-a Use the test chart (UKOG-0089CSZZ) Make a test chart. (Draw a rectangle or the resolution chart to make a 100% on B4 or 8 1/2" x 14" paper.) copy on B4 or 8 1/2" x 14" paper so that the resolution patterns are copied at the center and the four corners.
  • Page 63 Use a half-tone document and make a Make copies at the max. enlargement 100% copy on B4 or 8 1/2" x 14" ratio and the min. enlargement ratio. paper in the half tone mode. Measure the distances between the copy image lead edge and the copy Check the uniformity.
  • Page 64 C. Adjustment contents Optical unit cover (1) Lens a. Lens unit right angle adjustment I. Summary By setting the optical axis of the copier body and that of the lens in parallel with each other, copy image distortion due to the lens can be reduced.
  • Page 65: Mirror

    VII. Troubles caused by improper adjustment 2) Remove the document glass. (2) Mirror Optical unit cover There are following adjustments of parts installation positions related to the mirror. * No. 4/5 mirror unit right angle adjustment * No. 4/5 mirror unit drive cam position adjustment a.
  • Page 66 VII. Trouble caused by improper adjustment 5) Loosen the No. 4/5 mirror unit drive cam fixing screw without moving the lens unit drive gear. b. No. 4/5 mirror unit drive cam position adjustment (Zoom model only) I. Summary The copy magnification ratio and focus are properly adjusted by matching the lens unit movement and the No.
  • Page 67 Install the No. 1 and No. 2 scanner units to the specified posi- 2) Remove the document glass. tions, adjust the mechanical horizontal parallelism, and perform 3) Loosen the fixing screw of the No. 1 scanner unit wire. the final adjustment while making copies. II.
  • Page 68 Without moving the scanner unit drive pulley shaft, man- Procedures 1) to 8) are for adjustment of mechanical hori- ually turn the scanner nit drive pulley in the same side of zontal parallelism. No.1 scanner unit and No.2 scanner unit the loosened setscrew.
  • Page 69 10) Check the horizontal image distortion. b. Vertical image distortion adjustment If LL = LR, there is no horizontal distortion. I. Summary LL and LR = Distance between the copy hori- This adjustment is to adjust parallelism of the vertical optical axis zontal line and the outer edge of of the copier and that of each mirror to eliminate vertical image the black background...
  • Page 70 VI. Adjustment procedure 4) Change the height of the roller in No.4/5 mirror unit front frame side to adjust the vertical image distortion. 1) Set the test chart for image distortion adjustment on the If the copy image is tilting as shown in sample (X) below, document glass, and make a normal copy on a paper of A4 lower No.4/5 mirror unit.
  • Page 71 III. Note 5) Remove the right side cabinet and the document reference Before performing this adjustment, the following adjustment plate. must have been completed. If not, this adjustment cannot be Document performed properly. reference plate * Lens unit right angle adjustment Document table glass * No.4/5 mirror unit right angle adjustment * Image distortion adjustment...
  • Page 72 VII. Troubles caused by improper adjustment 4) Remove the right cabinet and the document reference plate. Document (5) Focus adjustment (Resolution adjustment) reference plate Document table glass I. Summary The distance between the document and the photoconductor drum is changed by changing No.4/5 mirror unit drive lever posi- tion to adjust the focus.
  • Page 73 VII. Troubles caused by improper adjustment IV. Cases when the adjustment is required 1) When the lens and the mirror unit are disassembled or the (6) Copy magnification ratio adjustment part is replaced. The copy magnification ratio adjustment must be performed in the 2) When the scanner unit drive section is disassembled or the vertical direction and in the horizontal direction.
  • Page 74 (When a 100mm scale is used as the original.) Original scale HARDDENCD STAINLESS JAPAN 1/2mm Shizuoka HARDDENCD STAINLESS Paper feed direction JAPAN 1/2mm Shizuoka Reference Comparison point Copy 5) Calculate the vertical copy magnification ratio. Copy image size Vertical copy magnification ratio = x 100 (%) Original size 6) Check that the actual copy magnification ratio is within the...
  • Page 75 II. Purpose VI. Adjustment procedure The purpose of this adjustment is to fit the displayed copy mag- (Document table copy mode: Horizontal copy magnification ratio nification ratio with the actual copy magnification ratio. adjustment) III. Note 1) Set the scale on the document table as shown below. (Use a Before performing this adjustment, the following adjustments long scale for precise adjustment.) must have been completed.
  • Page 76: Copy Density Adjustment

    Repeat procedures 1) to 8) until the horizontal copy magnifica- tion ratio in the normal (100%) copy mode is within the specified range. (SPF copy mode: Horizontal copy magnification ratio ad- justment) 1) Set the copied scale image paper which was made in the horizontal copy magnification ratio adjustment in the docu- ment table copy mode so that the scale image is horizontal in the SPF.
  • Page 77 (In some cases, Lv > = Lv) Exposare adjusting plate a. Copy image position adjustment (SF-2014/2114) I. Summary In order to adjust the copy image position on a copy paper, the lead edge position of an image on the photoconductor for the...
  • Page 78 * Test chart Adjustment value A: Corresponds to the time interval from * Black background document (SF-2014) the scanner unit starting and the (Copy image position adjustment) scanner home position sensor OFF to the resist roller ON. 1) Execute simulations 45-1. (C...
  • Page 79 5) Press the scale onto the document alignment plate and set it horizontally as shown below: Scale Scale image lead edge Reduction copy (x 0.64) 6) Execute simulations 50-1 to make several copies at each of 8) Enter the measure values in procedure 7) into the formula 129% and 64%.
  • Page 80 12) Check that the difference between the distance from the 13) Make a 100% copy, and check that the copy image lead copy paper lead edge to the copy image lead edge of edge is in the range of 0 1.5 mm from the paper lead edge 129% copy and that of 64% copy is in the range of 0 position reference.
  • Page 81 18) Set documents in the SPF, make 100% copies, and check IV. Cases when the adjustment is required that the copy image lead edge is in the range of 0 1) When the optical section is disassembled or its part is re- from the paper lead edge position reference.
  • Page 82 5) Measure the lead edge void area of each copy. 13) Make a copy in the SPF mode and check that the void area is within the specified range. Void area Void area Copy scale image Copy scale image 1/2mm 1/2mm Black background edge Black background edge...
  • Page 83 5) Measure the end edge void area of each copy. (End edge void area adjustment) Paper feed tray mode 1) Press the paper feed unit select button to blink the manual Void area paper feed lamp and to set the machine to the rear edge void adjustment mode in the manual paper feed mode.
  • Page 84: Copy Density Adjustment

    2) Set the adjustment mode to the normal copy mode (Non-toner- KODAK GRAY save mode). SCALE (Press the copy mode select key to light the normal copy mode SHARP CORPORATION lamp.) MADE IN JAPAN Copy mode lamp Copy sheet display...
  • Page 85 3) Set the density level to "1" with the copy density adjustment key. C. Normal copy mode (Toner save mode) copy density (The currently set copy lamp voltage level will be displayed on the adjustment COPIES SELECTED display.) 1) Set the adjustment mode to the normal copy mode (Toner save mode).
  • Page 86 F. Auto copy mode (Toner save mode) copy density adjustment Copy mode lamp 1) Set the adjustment mode to the auto copy mode (Toner save Copy sheet display Copy density display lamp mode). (Press the copy mode select key to light the auto copy mode lamp and the photo copy mode lamp.) 122% 115%...
  • Page 87 A : Auto copy mode N.TS : Non-toner-save mode P : Photo copy mode : Toner save mode (6) Copy density adjustment table N : Normal copy mode Copy mode Mode display Density level Test chart copy density Slightly copied Not copied N.TS Copied...
  • Page 88 4. Others After replacement, be sure to clean the charger wire with alcohol. (Be sure to use alcohol only.) After wiping with alcohol, wipe with a dry cloth. (1) Transfer charger wire installation Use charger wire of 70 (DWIR-0466CSZZ). Install the transfer charger wire as shown below. (Clean the charger wire at every 40K copies and replace it at every 80K copies.) Cut the wire at the Transfer charger unit (TC unit)
  • Page 89: Operating Procedure

    [8] SIMULATIONS 2. Purpose 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 90: Purpose List

    4. Purpose list Purpose Section Main Function Ref. page Adjustments Paper feed section Resist amount adjustment Optical section Copy magnification ratio adjustment (zooming) Lead edge void amount setting Copy density (exposure level) adjustment SPF exposure correction AE sensor characteristics value data auto input Front-rear direction magnification ratio adjustment (Vertical direction) Paper transport direction magnification ratio adjustment (Horizontal direction)
  • Page 91: Details Of Simulations

    5. Details of simulations Contents Purpose/kind Section Main Ref. page Description code code Adjustment Paper feed Used to adjust contact pressure between paper and the main body resist roller section or the SPF resist roller. (Amount of paper buckle at the resist roller) Change the set value when the shift between the paper and the image varies.
  • Page 92 Contents Purpose/kind Section Main Ref. page Description code code Adjustment Optical unit Used to adjust the copy density (exposure level) and the copy density gradient 7-26 (exposure gradient) in each copy mode. The exposure level is changed by changing the copy lamp applying voltage. The adjustment points are exposure levels "1"...
  • Page 93 Contents Purpose/kind Section Main Ref. page Description code code Adjustment Optical unit Used to store the characteristics of the AE sensor and the optical section for 7-26 the change in the copy lamp applying voltage. The exposure level in the auto copy mode is automatically determined by the stored data and the document density.
  • Page 94 Contents Purpose/kind Section Main Ref. page Description code code Adjustment Optical unit Used to adjust the copy image position on the copy paper. (Zoom, SPF 7-19 machine) (Operation/procedure) The adjustment is performed by changing the three set values A, B, and C. The zoom machine has two set values, the SPF machine three, but the normal machine only one.
  • Page 95 Contents Purpose/kind Section Main Ref. page Description code code Adjustment Developer unit (Operation/procedure) After 3 minutes from start of stirring of the DV unit after the main motor rotation, toner density is sampled 16 times during 8 sec, and the average value is stored as the toner density reference value in the RAM.
  • Page 96 AB series other than U.K. Inch series other than USA Indonesia Paper feed unit Used to set the manual paper feed mode. (SF-2014 only) There are two operation modes: auto and manual. Either of the two can be set. (Operation/procedure) When the simulation key operation is performed, the code number of the currently set operation mode is displayed.
  • Page 97 Contents Purpose/kind Section Main Ref. page Description code code Setting Process Used to set the correction modes. (Operation/procedure) When the simulation key operation is performed, the code number of the currently set mode is displayed on the COPIES SELECTED display. Enter the code number corresponding to the desired correction mode and press the print button, and the mode will be set.
  • Page 98 Contents Purpose/kind Section Main Ref. page Description code code Operation Paper feed unit Used to check the operations of the sensors and detectors in the paper feed check section, and their related circuits. The operations of the sensors and the detector in the paper feed section can be monitored by the lamps on the operation panel.
  • Page 99 Contents Purpose/kind Section Main Ref. page Description code code Operation Optical unit Used to check the operation of the optical unit and its control circuit. check (Operation/procedure) The operation of simulation 1-3 is repeatedly performed. Used to check the operation of the copy lamp and its control circuit. (Operation/procedure) The copy lamp lights up for first one sec at full power, and lights for 4 sec at the currently set exposer level (copy density).
  • Page 100 Contents Purpose/kind Section Main Ref. page Description code code Operation Process Used to display the reference value of the optical system dirt correction. check This value affects the process correction system. For details, refer to the 5-13 descriptions on the process correction system. Used to display the reference value of the optical system dirt correction.
  • Page 101 6. User simulation User simulation allows the user to change or cancel the factory set- tings easily according to his or her desirable operating environment on the following functions. (1) Functions which can be reset or canceled by User simulation. Auto clear function: Time for returnign to the standard state can be changed or canceled.
  • Page 102: Clearing The Self Diag Display

    [9] SELF DIAG 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 103 4. Self diag contents Error code Item Description Ref. page Main Content Scanner feed trouble 8-10 Detail 1) 86 pulses (45 mm) of the scanner motor drive pulse have been outputted after the scanner unit started scanning, but the scanner home position sensor (MHPS) does not turn off.
  • Page 104 Error code Item Description Ref. page Main Detail The rotary encoder signal cannot be detected for more than 50ms during delivery of the main motor On signal output. Cause 1) Main moor trouble 2) Main control circuit trouble 3) Main motor rotation sensor and its input circuit (main control circuit) trouble 4) Main motor drive mechanism trouble 5) An overload on the main motor drive section Remedy...
  • Page 105 Error code Item Description Ref. page Main Remedy Check the following items: 1) AE sensor or its input circuit 2) Copy lamp control circuit (copy lamp control signal) After repair, turn off/on the power switch. Content Fuser section thermistor trouble Detail The voltage across the thermistor input circuit remains 4.6V or more for 1500 ms or more.
  • Page 106 Error code Item Description Ref. page Main Remedy Check the following items: 8-12 1) Main PWB EEPROM 2) Memory control circuit 3) Communication line between main PWB EEPROM and CPU 4) CPU 5) Data bus line After repair, use simulation 16 to cancel the self diag When the power is turned on, data communication is performed with the main PWB EEPROM and the CPU.
  • Page 107 Error code Item Description Ref. page Main Content Personal counter installation trouble Detail The personal counter is not installed in the personal counter mode. The input circuit of the personal counter installation detect signal does not turn HIGH level. Cause 1) Personal counter trouble 2) Personal counter installation detecting signal input circuit (main PWB) trouble 3) Personal counter wiring...
  • Page 108 Error code Item Description Ref. page Main OPC drum Light Content OPC drum replacement timing alarm replacement Detail OPC drum replacement after copying 2,000 sheets. Blink Content OPC drum replacement Detail OPC drum replacement timing is reached. Cause The OPC drum unit counter exceeds the specified copy quantity (40K). (Note) The OPC drum counters are in the main PWB RAM and in the OPC drum.
  • Page 109 Memory trouble [10] SERVICING AT MEMORY Procedures for memory trouble, main control PWB replacement, TROUBLE AND MAIN and main control PWB EEPROM replacement CONTROL PWB REPLACEMENT "U2" trouble occurs 1. General The EEPROM in the control PWB and the EEPROM in the OPC drum unit are storing various set values, adjustment values, and counter values.
  • Page 110: Model

    Is the toner Use Sim 25-2 to set the density reference value toner density reference value recorded? Make a copy and Is the copy adjust the copy density adjustment Enter the toner density density (Sim 46-1/ value recorded? 51-6) reference value with Sim 73-1. Use Sim 46-1/51-6 to set the Use Sim 43-1 to set the copydensity adjustment value...
  • Page 111 Are the image lead edge position Make a copy and adjust the adjustment value and image lead efge position and the the resist roller ON resist roller ON timing timing adjustment value recorded? Use Sim 50-1 to set the image lead edge position adjustment value and the resist roller ON timing adjustment value Is the SPF mode...
  • Page 112: Model

    4. Set value recording sheet Contents Purpose/kind Section Main code Sub code Set value Description Adjustment Paper feed section Adjustment value of contact pressure of the paper on the main body resist roller Optical unit Adjustment value (lens shift amount adjustment value) of copy magnification ratio in zoom copying Adjustment value of copy paper lead edge void amount Adjustment value of copy density (exposure level) in each copy...
  • Page 113 5. Memory simulation list Contents Purpose/kind Section Ref. page Main Default Description code code value Adjustment Paper feed Adjustment value of contact pressure of the paper on the main section body resist roller Optical unit Adjustment value (lens shift amount adjustment value) of copy 7-16 magnification ratio in zoom copying Adjustment value of copy paper lead edge void amount...
  • Page 114 Contents Purpose/kind Section Ref. page Main Default Description code code value Counter Total counter Used to confirm the total counter value. Used to reset the maintenance counter. Used to set the maintenance cycle. Used to confirm the maintenance count value. Used to confirm the set maintenance cycle (maintenance preset counter).
  • Page 115: Electrical Section

    [12] ELECTRICAL SECTION 1. System block diagram RE PWB SPFD AE PWB MIR.M BL PWB DL PWB MFD1 MFD0 DV UNIT SPFM LHPS MHPS SPFC SRRC SPPD 1 3 6 SDSW +30V SPOD SPF PWB Personal Main circuit PWB Main motor counter CPU/memory/driver Operation PWB...
  • Page 116 3. Main circuit (1) Block diagram Multi bypass detection paper Counter Ventilation fan Heater lamp Blank lamp Lower unit transport sensor Operation panel Cooling fan Copy lamp control Discharge lamp Mirror home position sensor SPF fan Power relay Lens home position sensor Paper exit sensor SPF paper transport sensor Transport clutch...
  • Page 117: Block Diagram

    Block diagram Data bus (Even) Data bus (Odd) Data buffer D BH (8) Data buffer D BL (8) Command cue buffer Q0 (8) Command cue buffer Q1 (8) Command cue buffer Q2 (8) Address bus Incrementor (24) Program address register PA (24) Data address register DA (24) Incrementor/decrementor (24) Program counter PC (16)
  • Page 118 CPU: M37702 (IC110) pin signals Pin No. Port Signal name IN/OUT Description Analog input signal (AE sensor) Lower unit serial parallel IC input 2 port Lower unit serial parallel IC input 2 port MMRE Main motor timer input Power zero cross pulse detection signal MHPS Mirror home position detecting signal ("HIGH at Home position) AEG2...
  • Page 119 Pin No. Port Signal name IN/OUT Description Transport motor gain signal SPPD Paper entry detecting signal KEY3 Operation PWB key input signal KEY1 Operation PWB key input signal KEY0 Operation PWB key input signal OP-DATA Serial data output to operation PWB —...
  • Page 120 (4) Heater lamp control circuit General The heater lamp control circuit detects the heat roller surface temper- ature with the thermistor, converts it into voltage level, and outputs it to the CPU analog input pin. The CPU converts the analog voltage into digital signal level, com- pares it with the value set by simulations, turns on/off the heater lamp according to the level, and maintain the heat roller surface tempera- ture at a constant level.
  • Page 121 (5) Driver circuit (Solenoid, magnetic clutch) (6) Stepping motor drive circuit General General The control signals of each load outputted from the CPU and I/O The driver circuit drives the lens drive motor. cannot drive the load directly. The output, therefore, is delivered to A: Stepping motor phase A coil drive signal the load through the driver IC.
  • Page 122 Operation (8) Toner supply motor drive circuit After td (= 30msec) from when the voltage exceeds 4.25V after power IC104 is the motor control IC which drives the toner supply motor with rising, the output becomes HIGH. the pulse signals (TMa, TMb) outputted from the I/O chip. "td"...
  • Page 123 (10) Copy lamp control section The change in the copy lamp exposure level is adjusted by changing the ON period duty of the output pulse (CLPUM) from the CPU and controlling the copy lamp voltage. Fig. 1 and Fig. 2 show the circuit diagram and the waveform.
  • Page 124 The relationship between the CLV and the pulse ON period is as shown in the figure below: CPU output (CLPWM) 8 or 10 msec Pulse ON (Changeing) 60Hz 50Hz Pluse ON period (msec) • When the pulse ON period is shorter, the CLV becomes higher, and vice versa.
  • Page 125 4. Operating section (1) Outline The operating circuit is composed of the key matrix circuit and the display matrix circuit. Key detection: Keys are detected with signal matrix of W0 (Q25) W7 (Q32) and KEY0 KEY2. With W0 signal at LOW (GND) and W1 W7 at HIGH (open), the level of KEY0 KEY2 is checked and "H"...
  • Page 126 (2) Display circuit Control is performed with the data signal and the control signal from the control circuit. Block diagram VD (+10V) VD (+5V) S IN S OUT CLK LATCH STROBE VD (+5V) DATA Main control circuit LATCH VD (+5V) VD (+10V) ENABLE DC power circuit...
  • Page 127: Power Section

    (3) LED display The lED is lighted up by the signal matrix of MDL0 (Q1) MDL1 (Q2) and F0 (Q3) F20 (Q23). By turning on/off ports F0 F20 with the timing of MDL0 and MDL1, the LED at the matrix cross point is lighted up. +5V1 RDL1 DTB113ZS...
  • Page 128 • In the main PWB unit About 32V (VH) CHK JP C103 C144 470uF 63V 22000PF FB105 P-GND +24V (VB) NPN transistor P-GND D101 CHK JP DSS131 Q101 2SD1769 R101 510J 1/2W C142 ZD101 C102 C145 22000PF RD13EB1 47uF 35V 22000PF C143 ZD102...

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