Avision ScanCopier Service Manual
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Avision ScanCopier Service Manual

Avision ScanCopier Service Manual

Flatbed copier and scanner
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ScanCopier Service Manual
DOC #: 253-0038-0
Version 1.01
Avision Inc.

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Summary of Contents for Avision ScanCopier

  • Page 1 ScanCopier Service Manual DOC #: 253-0038-0 Version 1.01 Avision Inc.

  • Page 2: Table Of Contents

    5.2.6 SUB POWER SUPPLY CIRCUIT....................5-6 5.2.7 POWER SUPPLY ..........................5-6 6. TROUBLESHOOTING ..........................6-1 6.1 TROUBLESHOOTING FLOWCHART..................... 6-2 6.1.1 POWER ON TO SCANCOPIER READY..................6-2 6.1.2 TROUBLESHOOTING FLOWCHART ................... 6-3 6.2 TABLES..............................6-4 6.2.1 THE POWER LED DOES NOT LIGHT ON..................6-5 6.2.2 THE POWER LED BLINKING CONTINUALLY ................
  • Page 3 ScanCopier ------------------------------------------------------------------------------------------------------------------------------------------- 8.3 PROCEDURE FOR DISASSEMBLY AND REASSEMBLY..............8-5 8.3.1 NOTES ON DISASSEMBLY ......................8-5 8.3.2 DOCUMENT COVER........................8-5 8.3.3 UPPER HOUSING........................... 8-6 8.3.4 MAIN CONTROL BOARD ASSEMBLY ..................8-7 8.3.5 MOTOR BELT ..........................8-8 8.3.6 OPTICAL CHASSIS........................8-9 8.3.7 CCFL INVERTER PCBA ......................8-11 8.3.8 LAMP ASSEMBLY........................

  • Page 4: Introduction

    ScanCopier before serving the unit. 1.1 GENERAL NOTES FOR SERVICING Before trying to disassemble the ScanCopier, make sure the power supply code of the ScanCopier is disconnected from the power outlet. Under any circumstance, do not remove from or install the PWBs or connectors onto the ScanCopier with the power supply turned ON.
  • Page 5 The ScanCopier is also easy to use since the control panel on the front looks just like a panel on a regular copier. Users can enjoy copying almost immediately without further learning.

  • Page 6: Specification

    ScanCopier SPECIFICATION Basic Specification 2.1 BASIC SPECIFICATION Product Name: ScanCopier ScanCopier Type: Flatbed Optical Resolution 300 x 600 dpi Scanning Mode 30-bit Color (Internal) 10-bit Gray (Internal) Copy Resolution up to 600 x 600 dpi Copy Speed 20 ppm (if connect to a 20 ppm laser printer) Scanning (Copying) Size 8.5”...

  • Page 7: Unpacking, Installation, And Transportation

    • Do not install in a humid or dusty place. • Use care not to scratch the glass surface of the ScanCopier or the document holding pad with a clip or staple. • Do not use the wall socket with connecting devices which may generate noise, for example, air-conditioner, etc.

  • Page 8: Installation

    3.3 INSTALLATION (1). Unlocking the ScanCopier Before you use ScanCopier, be sure to unlock it by moving the lock switch under the ScanCopier to the “Unlock” position(See the following figure). The lock switch is designed to protect the scanning head in case of any damage during shipment.
  • Page 9 ScanCopier (2). Connecting to a laser printer a) Plug one end of the printer cable to the port marked “to printer” on the back of your ScanCopier. b) Plug the other end to your printer. (See the Figure 3.3) Copier Printer Cable “To Printer”...

  • Page 10: Placing The Original

    “To printer” on the back of the ScanCopier. Leave the other end connected to your printer. Plug one end of the supplied parallel cable to the port marked “To PC Parallel” on the back of the ScanCopier and plug the other end into your PC where the printer port cable was plugging in. Copier Power jack “To PC...

  • Page 11: Transportation

    ScanCopier 3.5 TRANSPORTATION To move the ScanCopier from where it is installed, for repair or any other reason, make sure to observe the following conditions: Turn off the power of the ScanCopier. If the scanning head is located at a place other than the home position, turn the ScanCopier on to return the scanning head to the home position.

  • Page 12: Parts Identification

    ScanCopier 4. PARTS IDENTIFICATION External View 4.1 EXTERNAL VIEW 4.1.1 FRONT VIEW Document Cover Scanning Head Control Panel Power-on Light Document Glass Figure 4.1 Front view...

  • Page 13: Rear View

    Document are set on the glass surface. (3) Scanning head The major component used to scan the document on the document glass. (4) Power-on light Turns on when the ScanCopier is power on. 4.1.2 REAR VIEW Power jack “To PC Parallel”...

  • Page 14: Top View

    ScanCopier 4.1.3 TOP VIEW Home position mark Scanning head Home position Hinge hole Scale Control Panel Feed Direction Figure 4.3 Top view (1) Home position Scanning begins at this position. The scanning origin and scan area on the computer display depends on the software to be used.
  • Page 15 ScanCopier 4.1.4 WIRING COMPONENTS EXTERNAL VIEW Motor Assy MOTOR ASS'Y (P/N: 002-0422-0) P/N 002-0422-02 Sensor Assy PCBA MB24 P/N 003-2021-0 PCBA MB24 SENSOR ASS'Y (P/N: 004-0091-0) P/N 004-0091-0 (P/N: 003-2021-0) PCBA CB38 P/N 004-0122-0 PCBA UNO2 PCBA CB38 (P/N: 004-0122-0)

  • Page 16: Theory Of Operation

    ScanCopier 5. THEORY OF OPERATION 5.1 INTRODUCTION Cold Cathode Fluorescent Lamp Analogue Signal Digital Lens Signal Main Reflected Board 1 1 0 0 0 0 1 1 0 0 Rays Figure 5.1 Theory of Operation The reflected rays of the your original as shown in the above Figure 5.1 pass through the lens and creates an image on the CCD (Charged Coupled Device).

  • Page 17: System Diagram

    ScanCopier 5.2 MAIN CONTROL UNIT 5.2.1 SYSTEM DIAGRAM Figure 5.2 shows the system block diagram. 100 Vac Host Printer To Printer Computer To Host Power Adapter 12Vdc 1284 Controller Control LCD Display & Section Push Button Main Board Video Circuit...

  • Page 18: Main Control Circuit

    MAIN CONTROL CIRCUIT 5.2.2 This ScanCopier is controlled by the 80C32. The 80C32 is configured with a 64-KB external ROM program area, a 256-BYTE internal RAM work area, a 64-KB external RAM work area, 2 timer / counters, 4 I/O ports, 2 external interrupts, and 2 internal interrupts for 2 internal timer / counters.

  • Page 19: Video Circuit

    ScanCopier 5.2.3 VIDEO CIRCUIT: The video circuit of this ScanCopier includes: 1. CCD driving circuit, 2. CCD signal processing circuit. CCD Driving Circuit The CCD driving circuit is used to generate correct signals to the CCD, so that the CCD may generate the correct image data.
  • Page 20 ScanCopier 2. CCD signal processing circuit Dout CCD Signal Processor The CCD signal processor includes all the necessary circuitry to perform three-channel conditioning and sampling. The signal chain consists of three-channel correlated double sampling (CDS) and programmable gain adjustment of the CCD output (PGA) is a 10 bit analog to digital connector (ADC) quantizes the analog signal.
  • Page 21 ScanCopier 5.2.4 LCD MODULE CIRCUIT The circuit for LCD module controls the function of the entire module including the LCD Display, the push button on the Control Panel, and the Ready LED. Pin assignment of LCD module Pin No. Name...

  • Page 22: Sensor Input

    ScanCopier 5.2.5 SENSOR INPUT The sensor input includes home position sensor. Home position sensor The home position of the carrier motor is detected by photo sensor. The photo transistor transmission to the photo sensor receiver circuit is shown below .

  • Page 23: Power Supply

    ScanCopier 5.2.7 POWER SUPPLY In this system, there is only one type of power supply. Please see Table 5.1 for details. Table 5.1 Power Adapter Type Wall-mount Characteristic Input voltage range 200-240V Input current(max.) 0.5A (rms) Input frequency 47-63Hz Max. in-rush...

  • Page 24: Troubleshooting

    Troubleshooting Flowchart Tables This section is given to locate and resolve the causes of troubles so as the ScanCopier is always in good working condition. The trouble modes, relevant units and maintenance methods are described below. When a problem occurs, troubleshoot the problem according to the symptoms it shows.

  • Page 25: Troubleshooting Flowchart

    6.1 TROUBLESHOOTING FLOWCHART 6.1.1 POWER ON TO SCANCOPIER READY Power on LCD shows See Table 6-1 “Warming up..." Message LCD shows “1 Copy 100%” & Ready LED on Wait for command from host Figure 6.1 Power on to ScanCopier ready...
  • Page 26 ScanCopier 6.1.2 COPIER OPERATION Copier online troubleshooting “Copy” button pressed? Check See Table 6-2 printer online? Reading See Table 6-3 performed Printing See Table 6-4 completed Image See Table 6-5 not clear Noises See Table 6-6 generated Figure 6.2 Copier operation flowchart...
  • Page 27 ScanCopier 6.1.3 CONTORL PANEL OPERATION Copier online troubleshooting Wait for key pressing LCD shows See Table 6-7 message Value setting Figure 6.3 Control panel operation...

  • Page 28: Tables

    ScanCopier 6.2 TABLES The following tables provide detailed troubleshooting information. Table 6.1 The Ready LED does not light up or the LCD does not display. Table 6.2 Printer does not react. Table 6.3 Optical path dirty or hardware problem. Table 6.4 Printer does not print.
  • Page 29 ScanCopier 6.2.1 LCD DOES NOT DISPLAY Table 6.1 Cause Relevant Unit Check Method Maintenance Method Unplugged from None Visual check Insert the AC plug into the outlet outlet AC power None Visual check Insert the AC power adapter unplugged from...

  • Page 30: Reading Is Not Performed

    ScanCopier 6.2.3 READING IS NOT PERFORMED Table 6.3 Cause Relevant Unit Check Method Maintenance Method Scanner cable Scanner Visual check Attach the failure cable scanner cable Scanner link Main PCB Visual check Replace the PCB failure 6.2.4 PRINTER DOES NOT PRINT...

  • Page 31: Image Unclear

    ScanCopier 6.2.5 IMAGE UNCLEAR Table 6-5 Cause Relevant Unit Check Method Maintenance Method Lamp too dark Replace the lamp Lamp Visual check Dirt on Clean the flatbed glass Flatbed glass flatbed glass with Visual check isopropyl alcohol Printer toner Check printer toner...
  • Page 32 ScanCopier 6.2.7 LCD DOES NOT SHOW MESSAGE AFTER COMMAND Table 6-7 Cause Maintenance method LCD module cable failure Attach the LCD module cable and secure it firmly LCD problem Replace the LCD module Push button failure Replace the LCD module...

  • Page 33: Preventive Maintenance

    7.1 CLEANING THE DOCUMENT GLASS There are times when the document cover and document glass is contaminated with ink, toner particles or paper coatings. In this case, the ScanCopier will have to be cleaned frequently to ensure the best performance.
  • Page 34 ScanCopier Document cover Document glass Figure 7.1 Cleaning...

  • Page 35: Disassembly

    ScanCopier 8. DISASSEMBLY Service Tools Lubricants Procedure for Disassembly and Reassembly 8.1 SERVICE TOOLS Table 7.1 describes the maintenance tools necessary for the maintenance of this equipment. Name Description Minus screwdriver Idler pulley module screw Philips screwdriver (magnetic) Nominal No.2 M3, M4 Shell “Terrace Oil 46”...

  • Page 36: Lubricants

    ScanCopier 8.2 LUBRICANTS This section describes the items to check and the places to lubricate when maintenance parts are replaced. 8.2.1 MECHANICAL UNIT LUBRICATION This lubrication method: Lubrication cycle Amount of lubricant Lubricant type Positions need to be lubricated (show in number) Positions need to be lubricated: The positions need to be lubricated is indicated in numbers.
  • Page 37 ScanCopier 1 Sliding Guide SLIFING GUIDE 2 Sliding Rod SLIDING ROD Figure 8.1 Positions need to be lubricated...

  • Page 38: Procedure For Disassembly And Reassembly

    ScanCopier 8.3 PROCEDURE FOR DISASSEMBLY AND REASSEMBLY 8.3.1 NOTES ON DISASSEMBLY Clean the disassembly and assembly location. Disconnect the power cable and remove the AC plug from the outlet before disassembly and assembly. Follow the disassembly and assembly procedures. Never loosen the screws of parts that must not be disassembled.

  • Page 39: Upper Housing

    ScanCopier 8.3.3 UPPER HOUSING Remove the document cover as described in the previous section. As shown in the figure below, loosen the fixing screws with a Philips screwdriver. Remove the upper housing by lifting it gently. Fixing Screws Document Glass Upper Housing Figure 8.3 Upper housing removal...

  • Page 40: Main Control Board Assembly

    8.3.4 MAIN CONTROL BOARD ASSEMBLY Loosen the fixing screws of the metal cover from the bottom housing as shown in the figure below. Loosen the fixing screws to remove the metal cover. Loosen the fixing screws of the SCSI connector with proper tool. Bottom housing Figure 8.4 Main control PCBA removal...

  • Page 41: Motor Belt

    ScanCopier 8.3.5 MOTOR BELT Remove upper housing and main control PCBA. (See section 8.3.4 and 8.3.4) Disconnect the motor belt by releasing the belt spring as shown in the figure below. Note: During the assembling process, keep the belt straight in center line.

  • Page 42: Optical Chassis

    ScanCopier 8.3.6 OPTICAL CHASSIS DISASSEMBLING PROCEDURE Remove the upper housing. ( See section 8.3.3 ) Remove the main control PCBA. (See section 8.3.4) Remove the cable clamp for the CCD flat cable. Disconnect the motor belt by releasing the belt spring. (See section 8.3.5) Lift the sliding rod and pull it out.
  • Page 43 ScanCopier Optical chassis Optical chassis Flat cable Flat cable Figure 8.7 The correct direction of the CCD flat cable...

  • Page 44: Ccfl Inverter Pcba

    ScanCopier 8.3.7 CCFL INVERTER PCBA Remove optical chassis. (See section 8.3.6). Remove the CCFC inverter PCBA from the optical chassis. Disconnect the CCFL inverter cable and CCFL inverter PCBA cable. Optical chassis CCFL inverter CCFL inverter cable Figure 8.7 CCFC Inverter PCBA removal...

  • Page 45: Lamp Assembly

    ScanCopier 8.3.8 LAMP ASSEMBLY Remove the CCFC inverter (See section 8.3.7) Loosen the fixing screws of the lamp holder. Disconnect and replace the old lamp assembly with a new one. Fix the lamp assembly in place with the fixing screw.

  • Page 46: Motor Unit

    ScanCopier 8.3.9 MOTOR UNIT Remove upper housing. (See section 8.3.3) Remove the optical chassis and the CCFL inverter PCBA. (See section 8.3.4 and 8.3.7) Remove the lamp assembly by loosing the fixing screws. (See section 8.3.8) Loosen the fixing screws as shown in the figure below.
  • Page 47 ScanCopier 8.3.10 HOME POSITION SENSOR PCBA REPLACEMENT Remove the upper housing. (See section 8.3.3.) Remove the main control PCBA (See section 8.3.4) and disconnect the LED cable. Loosen the fixing screw to remove the LED PCBA and replace a new one.

  • Page 48: Led Pcba

    ScanCopier 8.3.11 LED PCBA Remove the upper housing. (See section 8.3.3.) Remove the main control PCBA (See section 8.3.4) and disconnect the LED cable. Loosen the fixing screw to remove the LED PCBA and replace a new one. Reassemble the upper housing and the main board.

  • Page 49: Parts

    ScanCopier 9. PARTS 9.1 Spare Parts List 9.1 SPARE PARTS LIST...
  • Page 50 Manual Driver Kit CD...
  • Page 51 ScanCopier AVISION PART QT Y ITEM PART NAME UNIT DOCUMENT COVER ASSEMBLY 003-7249-0 UPPER HOUSING MODULE 003-7250-0 BOTTOM HOUSING ASSEMBLY 003-7251-0 SHIPPING LOCK 003-7252-0 OPTICAL ASSEMBLY 003-7253-0 CCFL ASSEMBLY 003-7254-0 INVERTER 003-7255-0 MOTOR MODULE 003-7256-0 BELT ASSEMBLY 003-7257-0 (PCBA MB24)

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