Avision ScanCopier User manual

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

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Contents
1.INTRODUCTION...........................................................................................................................................1-1
1.1 GENERAL NOTES FOR SERVICING ..................................................................................................... 1-1
1.2 SYSTEM CONFIGURATION.................................................................ERROR! BOOKMARK NOT DEFINED.
2. SPECIFICATION.......................................................................................................................................... 2-1
3. UNPACKING, INSTALLATION, AND TRANSPORTATION ..................................................................3-1
3.1 PRECAUTIONS OF INSTALLATION ..................................................................................................... 3-1
3.2 UNPACKING PROCEDURE .................................................................................................................... 3-1
3.3 INSTALLATION ...................................................................................................................................... 3-3
3.4 PLACING THE ORIGINAL...................................................................................................................... 3-5
3.5 TRANSPORTATION................................................................................................................................ 3-6
4. PARTS IDENTIFICATION..........................................................................................................................4-1
4.1 EXTERNAL VIEW................................................................................................................................... 4-1
4.1.1 FRONT VIEW................................................................................................................................. 4-1
4.1.2 REAR VIEW ................................................................................................................................... 4-2
4.1.3 TOP VIEW...................................................................................................................................... 4-3
4.2 SETTING DIP SWITCH ........................................................................................................................... 4-4
5. THEORY OF OPERATION.........................................................................................................................5-1
5.1 INTRODUCTION ..................................................................................................................................... 5-1
5.2 SCANCOPIER CONTROL ....................................................................................................................... 5-2
5.2.1 SYSTEM DIAGRAM...................................................................................................................... 5-2
5.2.2 MAIN CONTROL CIRCUIT........................................................................................................... 5-3
5.2.3 SCSI INTERFACE:......................................................................................................................... 5-4
5.2.4 VIDEO CIRCUIT:........................................................................................................................... 5-4
5.2.5 SENSOR INPUT.............................................................................................................................. 5-5
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........................................................................... 6-6
6.2.3 READING IS NOT PERFORMED .................................................................................................. 6-8
6.2.4 IMAGE DOES NOT APPEAR ON SCAN MODE........................................................................... 6-8
6.2.5 LARGE JITTER .............................................................................................................................. 6-9
6.2.6 READING POSITION DEVIATION............................................................................................... 6-9
6.2.7 IMAGE UNCLEAR....................................................................................................................... 6-10
6.2.8 STRANGE SOUND GENERATED............................................................................................... 6-10
7. PREVENTIVE MAINTENANCE.................................................................................................................7-1
7.1 CLEANING .............................................................................................................................................. 7-1
8. DISASSEMBLY.............................................................................................................................................8-2
8.1 SERVICE TOOLS..................................................................................................................................... 8-2
8.2 LUBRICANTS .......................................................................................................................................... 8-3
8.2.1 MECHANICAL UNIT LUBRICATION........................................................................................... 8-3

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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....................................................................................................................... 8-12
8.3.9 MOTOR UNIT............................................................................................................................... 8-13
8.3.10 LED PCBA.................................................................................................................................. 8-14
9. PARTS............................................................................................................................................................9-1
9.1 SPARE PARTS LIST ................................................................................................................................ 9-1

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1. INTRODUCTION
1.1 General Notes for Servicing
1.2 General Description
1.3 Features
This manual is intended to be used by the maintenance engineers. It describes areas to be maintained,
the detailed installation, and the component replacement procedures as well as the main trouble shooting
guides.
Please take your time to read this manual thoroughly to obtain comprehensive knowledge about the
ScanCopier before serving the unit.
1.1 GENERAL NOTES FOR SERVICING
(1) 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.
(2) Use caution not to drop small parts or screws inside the unit when disassembling and
reassembling. If left inside, they might cause the malfunction of the unit.
(3) Do not pull the connector cable when disconnecting it. Hold the connector.
(4) When carrying PWBs or the scanning head unit, put it in an anti-static bag.
(5) Keep the document table glass surface always clean. If contaminated, use a dry clean cloth for
cleaning.
(6) Use caution not to injure your fingers or hands when disassembling or reassembling the unit.

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1.2 GENERAL DESCRIPTION
ScanCopier is a fantastic digital copier when it is connected to a laser printer. The digital solution makes
your reproduction exceedingly clear and sharp compared to regular copy machines. Through auto photo
and text separation feature, your photo reproduction is amazingly improved with details and greyscale.
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.
ScanCopier is also a scanner when it is connected to a host computer. With a simple touch of the
“Scan” button, the ease-of-use scanning software immediately pops up on your computer screen.
Without further leaning, you can get a scan image and link the image to a variety of applications, for
example, the image-editing software, the OCR(Optical character recognition) software, the E-mail
software, the Fax software, etc. to make your jobs done in just a second.
1.3 COPY FEATURES
(1) A Compact and light weight copier
With only 3.7 kgs and a small foot print few inches more than an A4 page, ScanCopier is easy and
convenient to transport and relocate to fit your ever changing requirement.
(2) Ease of Use
The control panel on the front of ScanCopier looks like a panel on a regular copier. The operating
steps follow the same procedure as other regular copier.
(3) Auto photo and text separation
Incorporated with the dialogic processor, a mixed photo and text original could reproduce a clear
detail of photo image.
(4) Clear image of three dimensional object
Based on the CCD technology, ScanCopier could break through the limit of two dimensions, and
produce a clear image for a three dimensional object.
(5) Reduction or enlargement from 25% to 400%
ScanCopier provides reduction or enlargement for your original from 25% to 400%. You can access
the feature through the preset ratio or in 1% increment.
(6) Auto background removal
If your original comes with background, you can reproduce a clear image by removing the
background using the feature.
(7) A full color copier if connects to a host computer
When ScanCopier is connected to a host computer and a color printer, your ScanCopier is possessed
of a full color copy capability.

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2. SPECIFICATION
2.1 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” x 14”
Interface IEEE 1284 (bi-directional)
ECP/EPP/SPP
Copy Feature Zooming From 25%~400%
Auto Zooming
Auto Background Removal
Auto Photo, Text Separation
Power Consumption 15 watts
Photoelectric device Color CCD
Light Source Cold Cathode Fluorescent Lamp
Push Button Equipped
LED 1 LED (power)
Rated Voltage AC100-120V
Frequency Range 50-60Hz
Physical Dimension 356 mm x 457 mm x 91 mm(WxHxD)
Rated Current 1.25A/12V
Weight 3.7 kg (8.1 lbs)

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3. UNPACKING, INSTALLATION, AND
TRANSPORTATION
3.1 Precautions of Installation
3.2 Unpacking Procedure
3.3 Installation
3.4 Placing the Original
3.5 Transportation
3.1 PRECAUTIONS OF INSTALLATION
Pay attention to the following matters before unpacking and installation.
•Do not install in a place where vibration may occur.
•Keep the ScanCopier out of direct sunlight. Do not install near a heat source.
•Do not place the ScanCopier around materials which shut off the circulation of air.
•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.
•Use a suitable AC power source.
•Place the ScanCopier on a level surface.
3.2 UNPACKING PROCEDURE
Unpack the ScanCopier according to the following procedure.
•Remove the packing material.
•Remove the ScanCopier from the shipping container.
•Remove the ScanCopier from the PVC bag.
•Check the items by referring to Figure 3.1.
•For any missing items, please contact your nearest dealer or distributor.
Note: Keep all the packing material in case you may need to return the ScanCopier.

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12
345
Figure 3.1 Package Contents
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.
12
Figure 3.2 Unlock the ScanCopier
Note: If you need to transport the ScanCopier, be sure to first move the lock switch to the “Lock”
position to prevent any damage during transportation.
1. “Lock” Position
2. “Unlock” Position
1. Software CD
2. Power Adapter
3. One Parallel Cable
4. Quick Guide
5. ScanCopier main unit

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(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)
Figure 3.3 Connecting to a laser printer
(3). Connecting to Power
a) Plug the small end of the power cable(supplied) to the power jack on the back of your
ScanCopier.
b) Plug the large end of the power cable to the power outlet.
c) Turn on your printer.
Printer Cable
Copier
Printer
Power Cable
Copier
Power Jack
“To Printer”
port
Figure 3.4 Connecting to Power

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(4). Connecting to a host computer
a) Remove the printer cable from the parallel port of your computer and plug it into the port
marked “To printer” on the back of the ScanCopier. Leave the other end connected to your
printer.
b) 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.
Figure 3.5 ScanCopier cable connection
3.4 PLACING THE ORIGINAL
(1) Place your original face down on the document glass.
(2) Observe that the upper-left corner (front page) of your original is placed beneath the home
position mark.
123
Figure 3.4 Placing the original
Document
glass
Document
cover
Your original
Home
position mark
Upper-left corner
of your original
Control panel
Power jack
Copier
“To PC
Parallel” port
“To Printer”
port ScanCopeir
Cable
Printer
Cable

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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:
(1) 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. Before making sure the scanning
head is returned to the home position, turn the power supply off.
(2) Move the lock switch to the “lock” position.
(3) Remove the power and printer cables.
(4) Put the ScanCopier in the packing case with the packing material.

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4. PARTS IDENTIFICATION
4.1 External View
4.1 EXTERNAL VIEW
4.1.1 FRONT VIEW
1
Figure 4.1 Front view
Document
Cover
Scanning Head
Control Panel
Document Glass
Power-on Light

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(1) Document cover
Used to hold the document.
(2) Document glass
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
(1) Power jack
Used to connect power cable.
(2) “To PC Parallel” port
Used to connect parallel cable(supplied).
(3) “To Printer” port
Used to connect printer cable.
Power jack
Figure 4.2 Rear view
“To PC Parallel”
port
“To Printer” port

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4.1.3 TOP VIEW
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.
(2) Feed direction
The direction in which the scanning head moves.
(3) Scale
The document glass provides some fixed sizes, for example, U.S. legal, Letter, A4, B5, A5, and A6 of
a document on the glass.
(4) Hinge hole
When installing the document cover or an optional unit, insert the hinge into this hole.
Scale
Hinge hole
Home position
Home position mark
Control Panel
Scanning head
Feed Direction

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4.1.4 WIRING COMPONENTS EXTERNAL VIEW
PCBA MB24
(P/N: 004-0091-0)
PCBA CB38
(P/N: 004-0122-0) LAMP ASS'Y
(P/N: 002-0424-0)
MOTOR ASS'Y
(P/N: 002-0422-0)
(P/N: 003-0099-0)
INVERTER
(P/N: 104-0085-0)
FCC CABLE
(P/N: 003-2021-0)
SENSOR ASS'Y
(P/N: 004-0168-0)
PCBA UN02
FCC CABLE
(P/N: 104-0102-0)
Motor Assy
P/N 002-0422-02
PCBA MB24
P/N 004-0091-0
PCBA CB38
P/N 004-0122-0 Lamp Assy
P/N 002-0424-0
Inverter
P/N 003-0099-0
FCC Cable
P/N 104-0085-0
Sensor Assy
P/N 003-2021-0
PCBA UNO2
P/N 004-0168-0
FCC Cable
P/N 104-0102-0

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5. THEORY OF OPERATION
5.1 INTRODUCTION
Main
Board 11 00 00 11 00
Cold Cathode
Lens CCD
Analogue
Signal Digital
Signal
Fluorescent Lamp
Image
Processor
1284
Controller
Host
Printer
Reflected
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). Then, according to the different light intensity
perceived by the CCD, the CCD will transfer these data into a series of analog signals to the main
board, where the signals are turned into digital signals. These digital signals flows to the image
processor to store into a printer acceptable format then goes to 1284 Controller to transfer to printer or to
a host computer.

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

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5.2.2 MAIN CONTROL CIRCUIT
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.
Address Maps:
•ROM program area:
•Internal RAM working area:
•External RAM working area:
64KB Program
0000
FFFF
256-byte
Internal Registers
00
FF
System Memory
32KB
ASIC Control
Register 8KB
1284 Controller
Image Processor
0000
7FFF
2000
2FFF
2800
28FF
2C00
0
2CFF

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5.2.3 VIDEO CIRCUIT:
The video circuit of this ScanCopier includes: 1. CCD driving circuit, 2. CCD signal processing
circuit.
1. 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.
Signals for CCD:
Pin Assignment for CCD cable
Pin No. Name Function
1A.G. Analog Ground
2VOR CCD Red Channel Output Signal
3VOG CCD Green Channel Output Signal
4VOB CCD Blue Channel Output Signal
5A.G. Analog Ground
612Vc CCD Power Supply
712Vc CCD Power Supply
8D.G. Digital Ground
9RS CCD Reset Gate
10 CP Clamp Gate
11 PHI1- CCD Clock Phase
12 PHI2- CCD Clock Phase
13 SHR CCD Red Channel Shift Gate
14 SHG CCD Green Channel Shift Gate
15 SHB CCD Blue Channel Shift Gate
16 SH SHIFT Gate
17 VCC Digital 5V Power Supply
18 12VI Inverter Power Supply
19 12VI Inverter Power Supply
20 I.G. Inverter Ground
21 I.G Inverter Ground
22 I.G Inverter Ground

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2. CCD signal processing circuit
CDS
CCD Signal Processor
CDS
CDS
PGA
PGA
PGA
CCD MUX ADC
R
G
B
Dout
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.
* PGA: Programmable gain amplifier