Sheetfed Scanner
Service Manual
Version 1.0
Sheetfed Scanner
Contents
1. INTRODUCTION...........................................................................................................................1-1
1.1 GENERAL NOTES FOR SERVICING..............................................................................................1-1
1.2 GENERAL DESCRIPTION ...........................................................................................................1-2
1.3 BASIC SPECIFICATIONS ...........................................................................................................1-2
2. UNPACKING, INSTALLATION, AND TRANSPORTATION..............................................2-1
2.1 PRECAUTIONS OF INSTALLATION..............................................................................................2-1
2.2 UNPACKING PROCEDURE..........................................................................................................2-1
2.3 INSTALLATION .........................................................................................................................2-3
2.3.1 Installing the ADF Paper Tray............................................................................2-3
2.3.2 Installing the ADF Output Paper Tray ..............................................................2-4
2.3.3 Connecting the Cables.........................................................................................2-5
2.3.4 Turning on the Power ..........................................................................................2-5
2.4 PLACING THE ORIGINAL ...........................................................................................................2-6
3. THEORY OF OPERATION..........................................................................................................3-1
3.1 INTRODUCTION........................................................................................................................3-1
3.2 MAIN CONTROL UNIT................................................................................................................3-2
3.2.1 System diagram....................................................................................................3-2
3.2.2 Main control circuit...............................................................................................3-3
3.2.3 Video circuit: .........................................................................................................3-4
3.2.4 LED and Push Button Module Circuit................................................................3-6
3.2.5 Sensor input ..........................................................................................................3-7
3.2.6 Sub power supply circuit.....................................................................................3-8
3.2.7 Power supply .........................................................................................................3-9
4. PROBLEM SOLVING....................................................................................................................4-1
4.1 DIAGNOSTICS..........................................................................................................................4-1
4.1.1 Online diagnostics ................................................................................................4-1
4.1.2 Offline diagnostics ................................................................................................4-2
4.1.3 Diagnostic flowcharts...........................................................................................4-3
4.2 TROUBLESHOOTING .................................................................................................................4-6
4.2.1 Flowcharts..............................................................................................................4-6
4.2.2 Tables......................................................................................................................4-9
5. DISASSEMBLY.............................................................................................................................. 5-1
5.1 SERVICE TOOL.........................................................................................................................5-1
5.2 CLEANING THE ADF ................................................................................................................5-2
5.3 CLEANING THE CALIBRATION AREA..........................................................................................5-3
5.4 PROCEDURE FOR DISASSEMBLY AND REASSEMBLY ....................................................................5-4
5.4.1 Notes on disassembly..........................................................................................5-4
5.4.2 Removing the Upper Housing ............................................................................5-5
5.4.3 Removing the Upper Optical Assembly............................................................5-7
5.4.4 Removing the Upper Optical Chassis ...............................................................5-9
5.4.5 Removing the Lamp in Upper Optical Assembly..........................................5-10
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Service Manual
Removing the ADF Pad......................................................................................5-11
5.4.6
5.4.7 Removing the Main Control Board..................................................................5-12
5.4.8 Removing the Motor in Lower Optical Assembly .........................................5-14
5.4.9 Removing the Inverter in the Lower Optical Assembly..............................5-15
5.4.10 Removing the Lower Optical Chassis..........................................................5-16
6. PARTS..............................................................................................................................................6-1
6.1 SPARE PART DIAGRAM..............................................................................................................6-1
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Service Manual
1. INTRODUCTION
1.1 General Notes for Servicing
1.2 General Description
This manual is intended to be used by the maintenance engineers. It describes areas to be
maintained, the detailed installation, the disassembly of optional ADF, 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 scanner before serving the unit.
1.1 General notes for servicing
(1) Before trying to disassemble the scanner, make sure the power supply cord of
theAV220 is disconnected from the power outlet. Under any circumstance, do not
remove or install the connectors on the scanner 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 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.
1-1
Sheetfed Scanner
1.2 General Description
The scanner which features small footprint and fast scan rate is the perfect companion at
your desktop. The build-in automatic document feeder allows 50 sheets of documents to be
scanned continuously at one time and achieves fast scan rate of 25 pages per minute in
simplex mode and 50 images per minute in duplex mode.
1.3 Basic Specifications
Type: Sheetfed scanner, duplex
Optical Resolution: 600 dpi
Color Depth: 48-bit Color (input)
24-bit Color (output) single pass color (R, G, B)
Image Type:
ADF Scan Speed:
(NONE Channel at 200dpi
B&W A4 size)
256 shades of gray scale
64 shades of gray for halftones
Line art (binary)
Error diffusion
8-bit Color
24-bit Color
25 pages per minute (simplex mode)
50 images per minute (duplex mode)
Scan Area:
Paper Size:
Paper Thickness: 16 – 28 lbs/0.002” ~ 0.006”
Paper Input (ADF): up to 50 sheets
Physical Dimension:
HxWxD
Weight: 4.3 kg
Interface: USB 2.0
Power Source: Input: 100~240V, AC, 50/60 Hz
Power Consumption: ≤ 30 Watts
ADF: minimum: 3.5” x 2” (88 x 50 mm)
ADF: maximum: 8.5”x 14” (215 x 355 mm)
ADF Max.: 8.5” x 14” (Legal)
ADF single page min.: 3.5” x 2”
ADF duplex multipage min.: 3.5” x 3.0”
6.37 x 13,2 x 6.5 inches (without tray)
(162.3 x 337.2 x 167.8 mm)
Output: 24V, DC, 2.0A
1-2
Service Manual
2. UNPACKING, INSTALLATION, AND TRANSPORTATION
2.1 Precautions of Installation
2.2 Unpacking Procedure
2.3 Installation
2.4 Placing the Original
2.5 Transportation
2.1 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 scanner out of direct sunlight. Do not install near a heat source.
• Do not place the scanner 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 scanner 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 scanner on a level surface.
2.2 Unpacking Procedure
Unpack the scanner according to the following procedure.
• Remove the packing material.
• Remove the scanner from the shipping container.
• Remove the scanner from the PVC bag.
• Check the items by referring to Figure 2.1.
• 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 scanner.
2-1
2
1
4 5
1. Main Unit
2. Input Paper Tray
3. Output Paper Tray
4. USB Cable
5. Power Adapter
6. Power Cord
Figure 2.1 Package Contents
3
6
2-2
Service Manual
2.3 Installation
2.3.1 Installing the ADF Paper Tray
1. Attach the ADF Paper Tray to the clip joint of the scanner as indicated below. When
properly insert, you will hear a snap-in sound.
ADF Input
Paper Tray
Scanner
Clip Joint
Figure 2.2 Installing the ADF Paper Tray
2-3
2.3.2 Installing the ADF Output Paper Tray
1. Hold the Output paper tray some 30 degrees as shown in below.
2. Insert the right protrusion of the Output Paper Tray into the hole on the front of the
scanner.
3. Insert the left protrusion of the Output Paper Tray slightly into the hole on the front of
the scanner.
Scanner
Output
Paper Tray
Output
Paper Tray
Hole
Protrusion
Figure 2.3 Installing the Output Paper Tray
2-4
Service Manual
2.3.3 Connecting the Cables
Make sure the power of scanner is off.
2.3.3.1 Connecting to Power
Plug the small end of the power adaptor into the power jack of your scanner. Insert the
other end to an appropriate power outlet.
Power Cable
Figure 2.4 Installing the Power Cable
2.3.4 Turning on the Power
After the power cable and the USB cable have all connected, press the power switch to
the “I” position to turn on the scanner. To turn off the scanner, please press the power
switch to the “O” position.
Power Switch
Figure 2.5 Turn on the scanner
2-5
2.4 Placing the original
Document feeding
Place your document with the text face down on the ADF Input Paper Tray. Align the
two sides of the document with the slide guides. Please note that the ADF Input Paper
Tray can hold up to 50-page document at a time.
Your
Document
(Face
Paper Slider
Figure 2.6 Place the document
2-6
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3. THEORY OF OPERATION
3.1 Introduction
3.2 Main Control Unit
3.1 Introduction
Cold
The reflected rays of your original as shown in the above Figure 3.1 pass through the lens
and create 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 flow to the USB 2.0 Controller to transfer to a host computer.
Reflecte
Reflected
Ray
Ray
Cold
Fluorescent
Fluorescent Lamp
Len
Len
CCD
CCD
Figure 3.1 Theory of Operation
Analogu
nalogue
Signa
Signal
Mai
Main
Boar
Board
Digital
Digital
Signa
Signal
1
1
0
0
0
0
Hos
1
1
0
0
USB 2.0
Controlle
Host
3-1
3.2 Main control unit
3.2.1 System diagram
Figure 3.2 System block diagram
3-2
3.2.2 Main control circuit
This scanner 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:
0000
FFFF
• Internal RAM working area:
00
FF
y External SRAM working area:
0000
FFFF
64KB Program
256-byte
Internal Registers
64 KB
External Program
Service Manual
3-3
3.2.3 Video circuit:
The video circuit of the scanner 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.
1 AG Analog Ground
2 VOR CCD Red Channel Output Signal
3 AG Analog Ground
4 VOG CCD Green Channel Output Signal
5 AG Analog Ground
6 VOB CCD Blue Channel Output Signal
7 AG Analog Ground
8 12VDC CCD Power Supply
9 SH CCD RGB Channel Shift Gate
10 PHI1 CCD Clock Phase
11 DG Digital Ground
12 PHI2 CCD Clock Phase
13 DG Digital Ground
14 RS CCD Reset Gate
15 DG Digital Ground
16 CP Clamp Gate
17 VCC Digital 5V Power Supply
18 SW Changeover Switch (color and
Name Function
B/W)
3-4
Service Manual
2. CCD signal processing circuit
CCD
R
G
CDS
CDS
PGA
PGA
MUX ADC
Dout
B
CDS
PGA
CCD Signal Processor
The CCD signal processor includes all the necessary circuitry to perform threechannel 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 16 bit analog to digital connector (ADC) quantizes the analog
signal.
3-5
3.2.4 LED and Push Button Module Circuit
The circuit for the LED and Push Button modules showes the function of the entire
scanner including the Error LED (Red), the Ready LED (Green) and the Push Button.
.
Pin assignment of LED module
Pin No. Name Function
1 Ground Ground
2 Ground Ground
3 Button Scan
4 Button Cancel
5 Button Function select
6 LED G Ready status indicator
7 LED R
8 Seven 1
9
10
11
12
13
14
15
Seven 2 Seven segment display
Seven 3 Seven segment display
Seven 4 Seven segment display
Seven 5
Seven 6 Seven segment display
Seven 7 Seven segment display
Seven 8 Seven segment display
Seven segment display
Seven segment display
Seven segment display
3-6
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3.2.5 Sensor input
A. Photo_Sensor
The sensor input includes paper in/out sensor.
Paper In/Out sensor
The paper position is detected by photo sensor. The photo transistor transmission
to the photo sensor receiver circuit is shown below.
The paper in/out sensor is detected when the paper passes between the LED and the
photo transistor.
B. IR-Sensor
Service Manual
Out
Figure 3.3 Paper in/out sensor
+5V +5
Out
DAC
+
_
-
(OP)
Figure 3.4 IR_Sensor
3-7
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3.2.6 Sub power supply circuit
The sub power supply circuit is provided for the internal analog circuit. Input is
24V and output is Vcc and +5Va. The circuit configuration is shown below:
+24Vdc Vcc
+12V +5Va
+24Vdc +12V
Vcc +3.3V
The sub power supply is used for: A/D, and logic circuits.
Switching
ulato
Re
Linear
ulato
Re
Linear
ulato
Re
Linear
ulato
Re
3-8
3.2.7 Power supply
In this system, there is only one type of power supply. Please see Table 3.1 for
details.
Characteristic
Input voltage range 100-240V
Input current (at the
rated input/output)
Input frequency 50-60Hz
Max. in-rush
current(@full load,
cold start)
Output voltage +24Vdc
Min. load current 0.0A
Max. load current 2A
Total power (at full
load)
Table 3.1 The Power Adapter
Type
Wall-mount
2A type or less
45A
30W
Service Manual
3-9
4. PROBLEM SOLVING
4.1 Diagnostics
4.2 Troubleshooting
This chapter supplies two paths for dealing with operational problems. The first relies
on the scanner’s internal diagnostics. The second uses troubleshooting flowcharts and
tables to isolate the problem. In many cases, the internal diagnostics will help you to
locate the source of the problem quickly. Use these diagnostics first. If the
diagnostics do not locate the source of the problem, refer to Section 4.2
Troubleshooting.
4.1 Diagnostics
Service Manual
The scanner has internal diagnostics to help you determine the cause of operational
problems. Some of the diagnostics function with the scanner online, while others are
part of a separate offline diagnostics feature.
4.1.1 Online diagnostics
Determine operational problems by observing the display panel Error, Ready, and
Check LEDs. With the scanner online and operating normally, the Ready LED is on
and the Error LED is off. Any other Error LED indicates a problem, as shown in the
following table.
Ready LED Green LED On
Check LED Green LED Blinking
Error LED
Indication
Table 4.1 Online diagnostics
RED LED Blinking
(Group Error)
If the ADF cover is open, close it. For the group errors, see the flowcharts later in this
section.
4-1
4.1.2 Offline diagnostics
To run the offline diagnostics, and turn the power back on. When you first turn the
scanner back on, the READY light will blink, indicating that the diagnostics are in
progress. Observe the front panel Error LED closely. In a short time, the Error LED
indicates the results of the offline diagnostics as explained in the table below.
Ready LED
(Green)
ON (No blinking) OFF OK (Ready)
OFF 1 Face down SDRAM failure
OFF 2 Face up DRAM failure
OFF 3 CPU DRAM failure
OFF 4 Face down DC offset adjust
OFF 5 Face up DC offset adjust failure
OFF 6 Cover open error
OFF 7 Face down light check failure
OFF 8 Face up light check failure
OFF 9 Paper jam
OFF 0 USB disconnect
Error LED (RED) Error Indication
failure
Table 4.2 Offline diagnostics results
For SRAM & DRAM error, refer to Main Control PCBA Replacement in Chapter 5. For the
Group 2 error, see the flowchart in the following section.
To return the scanner to online operation, turn off the scanner, turn the scanner back on.
4-2
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4.1.3 Diagnostic flowcharts
Use the flowcharts that follow to determine the exact problem when either the online
or offline diagnostics indicate a group error. Refer to Chapter 4 for parts replacement.
4.1.3.1 Group 1 error flowchart (CCFL assembly)
This flowchart applies when the Error LED shows number 7 and 8.
Group 1 Erro
Yes No
CCD error
Replace optical
assembly
CCFL is on?
Inverter erro
Replace lamp
inverter circuit
End of test
Yes
CCFL is on?
Replace the CCFL
o
Service Manual
4-3
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4.1.3.2 Group 2 error flowchart (paper in ADF paper tray)
This flowchart applies when the Ready LED is off and Error LED shows number 9
with the scanner online, and there is paper in the ADF paper tray.
Group 2 erro
Open cover and then
remove the papers from
ADF’s input paper tray,
and wait for 3 seconds
than close the cover.
Yes
ADF
motor
No
ADF paper-in sensor error Place paper in the ADF
Replace ADF paper-in
sensor or SB12 PCBA
paper tray and wait for 3
seconds
IR-sensor
error
Replace IR
sensor or
SB12
PCBA
Yes
Try again,
ADF motor
moves?
No
OK
OK
Yes
ADF m
moves
otor
?
No
IR-sensor error or
scanner inside
contains paper
4-4
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4.1.3.3 Group 3 error flowchart (no paper in ADF paper tray)
This flowchart applies when the Ready LED is off and Error LED shows number 6
with the scanner online, and there is no paper in the ADF paper tray.
Group 3 Error
Open cover, then close the
cove
No
Check Ready LED on?
Refer to the
Result in Table
3.2
Yes
OK
Place a piece of paper
into ADF Input Paper
Tray and waits for 3 secs.
Service Manual
4-5
4.2 Troubleshooting
Refer first to the applicable troubleshooting flowchart in the following three sections.
The flowcharts refer you to the appropriate table for detailed troubleshooting.
4.2.1 Flowcharts
This section provides the following troubleshooting flowcharts:
• Troubleshooting from power on to scanner ready
• Online troubleshooting (ADF operation)
4-6
Service Manual
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4.2.1.1 Troubleshooting flowchart: power on to scanner ready.
Troubleshooting From Power on
Power
LED on
o
See Table 4.3
Cover open test
Yes
IR sensor test
DRAM Test
Face down SDRAM test
Face up SDRAM test
Face down light check
Face up light check
Warming-up Check
(Green LED Blinking)
Warming-
up Finish?
o
Wait for command
(Green LED on)
Yes
from host
4-7
N
N
N
N
N
N
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4.2.1.2 Troubleshooting flowchart: online ADF operation
Online Troubleshooting
(ADF mode)
Frequent
Paper Jam?
Yes
See Table 4.9
o
Frequent
double feed
Yes
See Table 4.10
o
Large skew
volume?
Yes
See Table 4.10
o
Large jitter
Yes
See Table 4.6
o
Reading
position
deviation?
Yes
See Table 4.7
Image
unclear
o
Yes
See Table 4.8
o
Strange
sound
enerated?
o
End
Yes
See Table 4.11
4-8
4.2.2 Tables
The tables in this section provide detailed troubleshooting information.
4.2.2.1 The Power LED does not go on
Cause Relevant Unit Check Method
Unplugged from
outlet
AC power
unplugged at
unit
Power switch is
OFF
AC voltage
failure
Power unit AC
input connector
disconnected
Power switch
connector
disconnected
Power unit-main
PCBA connection
failure
Power unit
output voltage
failure
PCBA Failure Main control
LED board-main
PCBA connection
failure
None Visual check Insert the AC
None Visual check Insert the AC
None Visual check Turn the power
None AC outlet voltage
check
None Visual check Connect the
None Visual check Connect the
None Visual check Connect the
Power unit Output voltage
(+24V) check
Tester check
PCBA
LED board
None Visual check Connect the
(+24V, GND)
Maintenance
Method
plug into the
outlet.
cable into unit.
switch on.
None
connector.
connector.
connector.
Replace the
power unit
Remove the
cause or replace
the PCBA.
connector
Table 4.3
Service Manual
4-9
4.2.2.2 Reading is not performed
Cause Relevant
Unit
ADF cover open ADF cover Visual check Close the ADF
4.2.2.3 Image does not appear
Cause Relevant
Unit
ADF cover
open
Power supplymain control
board
connection
failure
Power supply
fails.
Lamp failure Lamp Visual check Replace the
Inverter failure Inverter Visual check Replace the
CCD boardmain control
board
connection
failure
CCD board
fails.
ADF cover Visual check Close the ADF
None Visual check Connect the
Power supply Tester check
None Visual check Connect the
CCD Board Visual check Replace the
Check
Method
Table 4.4
Check
Method
(+24V, GND)
Table 4.5
Maintenance
Method
cover.
Maintenance
Method
cover
connector.
Replace the
power supply.
lamp.
inverter.
connector.
optical unit.
4-10
4.2.2.4 Large jitter
Cause Relevant
Power supplymain control
board connection
failure
Power supply fails Power
Motor-main
control PCBA
connection failure
Motor failure Motor Visual check Replace the
Service Manual
Check Method Maintenance
Unit
None Visual check Connect the
Tester check
supply
None Visual check Connect the
(+24V, GND)
Table 4.6
Method
connector.
Replace the power
supply.
connector.
motor.
4-11
4.2.2.5 Reading position deviation
Cause Relevant Unit Check Method Maintenance
Power supplymain control
board
connection
failure
Power supply
fails
Motor- main
control PCBA
connection
failure
Motor failure Motor Visual check Replace the
IR sensor
board- main
control PCBA
cable failure
IR sensor
board- main
control PCBA
cable failure
IR sensor
board (SB21)
failure
None Visual check Connect the
Power supply Tester check
None Visual check Connect the
None Visual check Connect the
Sensor boardmain control
PCBA cable
Sensor board Tester check Replace the
(+24V, GND)
Tester or visual
check
Method
connector.
Replace the
power supply.
connector.
motor
connector
Replace the IR
sensor cable
PCBA.
Table 4.7
4-12
4.2.2.6 Image unclear
Cause Relevant Unit Check Method Maintenance
Method
Lamp too dark Lamp Visual check Replace with a
new lamp.
Dirt on calibration
reference plate
Dirt on calibration
reference plate
Dirt on the mirrors Mirrors Visual check Clean the
Dirt on the lens Lens Visual check Clean the lens
Calibration
reference plate
Calibration
reference plate
Visual check Clean the glass
with isopropyl
alcohol.
Visual check Clean the
calibration
reference plate
with isopropyl
alcohol.
mirrors with
isopropyl
alcohol.
with isopropyl
alcohol.
Table 4.8
4.2.2.7 Frequent paper jam
Cause Relevant
Unit
Paper setting
failure
Paper failure operation
Pad assembly
failure
Operation
error
error
Pad assembly Check the pad
Check
Method
Is the paper
correctly set in
the paper
chute?
Is the
specified
paper used?
assembly for
wear and tear
Maintenance
Method
Educate users
to properly
position the
paper.
None None
Replace the
pad assembly/
touch spring
unit.
Table 4.9
Service Manual
Remar
k
None
None
None
None
None
Remark
None
None
4-13
4.2.2.8 Frequent double feed and skew
Cause Relevant
Unit
Paper setting
failure
Operation
error
Paper failure Operation
error
Pad assembly
Pad assembly Check the pad
failure
Check
Method
Is the paper
correctly set in
the paper
chute?
Is the
specified
paper used
assembly for
wear and tear.
Table 4.10
4.2.2.9 Strange sound generated (ADF)
Cause Relevant
Check Method Maintenance
Unit
Paper setting
failure
Operation
error
Is the paper
correctly set in
the paper chute?
paper failure Operation
error
Is the specified
paper used?
Table 4.11
Maintenance
Method
Teach users to
properly position the
paper
None
Replace the pad
assembly/ touch
spring unit.
Method
Teach users to
properly position
the paper
None
4-14
5. DISASSEMBLY
5.1 Service Tools
5.2 Lubricants
5.3 Procedure for Disassembly and Reassembly
5.1 Service Tool
Service Manual
Table 5.1 describes the maintenance tools necessary for the maintenance of this
equipment.
No
Name Description
.
1 Minus screwdriver Idler pulley module screw
2 Philips screwdriver
(magnetic)
3 Oil Shell “Terrace Oil 46”
4 Grease Shell “Alvania Grease No.2”
5 Alcohol (Isopropyl 91% >) Cleaning
6 Digital voltmeter With 0.01 V range
7 Oscilloscope 100 MHz or more with
Nominal No.2 M3, M4
external sweep
Table 5.1 Maintenance tools
5-1
5.2 Cleaning the ADF
From time to time the pad assembly and feeding rollers may become
contaminated with ink, toner particles or paper dust. In this case the scanner
may not feed documents smoothly. If this occurs please follow the cleaning
procedures to return your machine to its original state.
The Cleaning Procedures
1) Soak a cotton swab with some isopropyl alcohol. (95%).
2) Press the ADF Release button on the upper-left. Open the front door slightly to
the left. Wipe the upper feeding roller by moving the swab from side to side.
Rotate the roller forward with your finger and repeat the cleaning steps above
until the entire roller is cleaned.
3) Wipe the ADF pad in one direction from top to bottom or the other way around.
Be careful not to damage the pick springs.
4) Close the scanner front door. Your scanner is now ready for use.
ADF Release
button
ADF Pad
Feeding Roller
5-2
Service Manual
5.3 Cleaning the Calibration Area
1. Press the Paper Jam Clearing button. Open the front door to the left.
2. Wet a cotton swab with some isopropyl alcohol. (95%)
3. Wipe the glass and the white area as illustrated in below by moving the swab from side
to side to rid the dust or dirt.
Calibration
Area
Glass
ADF Front Door
5-3
5.4 Procedure for disassembly and reassembly
5.4.1 Notes on disassembly
(1) Clean the disassembly and assembly location.
(2) Disconnect the power cable and remove the AC plug from the outlet before
disassembly and assembly.
(3) Follow the disassembly and assembly procedures. Never loosen the screws of
parts that must not be disassembled.
(4) Store the disassembled parts in a clean place to avoid loss.
(5) After replacement, check the contacts and spare part mounting.
(6) Assemble the parts in reverse order of disassembly procedure.
5-4
Service Manual
5.4.2 Removing the Upper Housing
1. Hold the Output Paper Tray and push your finger inwardly to remove the Output Paper
Tray.
2. Hold the Input Paper Tray and lift the Tray to remove it.
3. Press the ADF release button to open the cover.
4. Remove 2 fixing screws.
5. Unscrew the 4 fixing screws on the upper housing.
6. Remove the Upper Housing.
Press inwardly to remove Remove Input Paper Tray
the Output Paper Tray
Press the ADF release button Remove 2 fixing screws
5-5
Remove 4 fixing screws Remove the upper housing
5-6
5.4.3 Removing the Upper Optical Assembly
1. Press the Paper Jam Release Button to open the cover.
2. Loosen 2 fixing screws on the upper case.
3. Remove the fixing sponge.
4. Loosen 2 fixing screws on the left side.
5. Loosen 1 fixing screw on the right side.
Service Manual
Paper Jam
Released Button
Sponge
Fixing Screw x 2
Fixing screws x 2
5-7
6. Disconnect the inverter cable with red and black colors.
7. Disconnect the lamp inverter cable (in white color) to remove the inverter.
Fixing Screw x 1
Inverter Cable
Power cable
Inverter
5-8
Service Manual
5.4.4 Removing the Upper Optical Chassis
1. Remove the inverter in the upper optical assembly. (See preceding section 5.3.3)
2. Disconnect two cables on the optical chassis.
Cables
Optical Chassis
CCD Board
Note:
During assembling or disassembling procedure, please pay special attention not to touch the
CCD board on the optical chassis. Otherwise, the scanning quality may be affected.
5-9
5.4.5 Removing the Lamp in Upper Optical Assembly
1. Remove the upper optical chassis. (See preceding section 5.3.4)
2. Loosen two fixing screws on the lamp cover.
3. Use a flat screwdriver to loosen the lamp assembly.
4. Gently remove the lamp assembly.
Fixing Screw x 2
Lamp assembly
Flat screwdriver
5-10
Service Manual
5.4.6 Removing the ADF Pad
Use your fingers to press two sides of the ADF pad and lift the pad on the upper optical
assembly to remove it.
ADF Pad
5-11
5.4.7 Removing the Main Control Board
1. Unscrew 1 fixing screw on the right side.
2. Unscrew 2 fixing screws on the left side and close the cover.
3. Raise the main unit and disconnect the motor cable and flat cable.
4. Unscrew all fixing screw.
5. Disconnect all cables.
6. Remove 4 fixing screws on the main board.
Remove one fixing screw on the right
side
Raise the main unit a bit
Remove two fixing screws on the left side
Disconnect flat cable
Disconnect cables
Disconnect motor cable
5-12
Service Manual
Power cable
2 Fixing
screw
2 fixing
screw
Remove 4 fixing screw and disconnect the power cable
The main board
5-13
5.4.8 Removing the Motor in Lower Optical Assembly
1. Turn the scanner over.
2. Remove 2 fixing screws on the external side of the metal plate.
3. Remove the motor.
Remove 2 fixing screws
The motor
5-14
5.4.9 Removing the Inverter in the Lower Optical Assembly
1. Cut the cable bondage.
2. Remove the inverter from the plastic fixing plate.
3. Disconnect the inverter cable.
Service Manual
Inverter
The inverter
cable
Release the inverter from the plastic plate and disconnect the inverter cable
The inverter
5-15
5.4.10 Removing the Lower Optical Chassis
1. Remove 2 fixing screws on the left and external side of the metal plate.
2. Remove 2 fixing screws on the right and internal side of the metal plate.
3. Remove the Optical Chassis.
Remove 2 fixing screws on the left external side Remove 2 fixing screws on the right internal side
Optical Chassis
5-16
5.4.11 Removing the Lamp in the Lower Optical Assembly
1. Remove 2 fixing screws on the lamp assembly.
Service Manual
2. Remove the lamp.
Remove 2 fixing screws on the lamp assembly
The lamp assembly
5-17
6. PARTS
6.1 Spare Part Diagram/Table
6.1 Spare part diagram
Service Manual
6-1
6-2
Service Manual
6-3
Xerox DocuMate 252 Spare Parts List:
XEROX DocuMate 252
SERVICE PARTS TABLE
VISIONEER P/N
DESCRIPTION
65-0247-000
OPTICAL, LOWER, W/LAMP
65-0295-000
ASS'Y, LOWER OPTICAL: FOR FACE-DOWN
65-0296-000
ASS'Y, LAMP MOUNT, FACE DOWN
65-0248-000
INVERTER
65-0249-000
ROLLER, FEED, PAPER IN
65-0250-000
ASS'Y, MOTOR
65-0251-000
ASS'Y, PAPER PATH LOWER
65-0242-000
OPTICAL, FACE DOWN, W/LAMP, GREEN CCD
65-0297-000
ASS'Y, OPTICAL, FACE DOWN, TRANSTION
65-0298-000
ASS'Y, LAMP, FACE DOWN
65-0248-000
INVERTER, 24VDC
65-0252-000
ASS'Y, PAPER GUIDE, UPPER, W/O LAMP
65-0253-000
PCBA, LB47
65-0299-000
CABLE: 2/2 HOUSING,
65-0300-000
CABLE: 12P
65-0254-000
ROLLER, FEED, PAPER OUT
65-0255-000
BEARING COVER HINGE
65-0256-000
HOUSING, BOTTOM
65-0302-000
PCBA
65-0303-000
POWER S/W 5 pin
65-0304-000
ASS'Y, COVER UNIT
65-0305-000
ASS'Y, UPPER HOUSING
57-0104-000
ASS'Y, ADF INPUT TRAY / DM252
57-0105-000
ASS'Y, PAPER OUTPUT TRAY / DM252
65-0306-000
OPTICAL, UPPER, W/LAMP
65-0307-000
ASS'Y, OPTICAL, UPPER
65-0308-000
ASS'Y, LAMP MOUNT, FACE UP
65-0258-000
INVERTER (CCFL-T)
65-0310-000
OPTICAL, FACE UP, W/LAMP, GREEN CCD
65-0311-000
ASS'Y, OPTICAL, FACE UP, TRANSITION
65-0312-000
ASS'Y, LAMP
ACCESSORIES
65-0313-000
EPS FOAM, L: 310x278x160
65-0314-000
EPS FOAM, R: 310x278x160
65-0259-000
ADAPTOR, WITH EMI CORE
35-0071-000
AC POWER CORD, UL/CSA, PLUG
65-0497-000
AC POWER CORD: EUR
65-0498-000
AC POWER CORD: UK
65-0499-000
USB 2.0 CABLE
65-0500-000
S/W PACKAGE
65-0501-000
S/W PACKAGE: EUR/UK (EFIGS)
65-0502-000
CARTON: 470x290x340, A/F
Xerox DocuMate 262 Spare Parts List:
XEROX DocuMate 262 GREEN
SERVICE PARTS TABLE
VISIONEER P/N
DESCRIPTION
65-0372-000
S-PARTS: ASS'Y, PAPER GUIDE, UPPER W/O LAMP, RoHS
65-0322-000
S-PARTS: PCBA: LBA69, RoHS
65-0299-000
S-PARTS: CABLE: 2/2 HOUSING, 14P+6P, P=2.0mm, L=420mm,
28AWG,聯 穎, W/TUBE, W/CORE, RoHS
65-0324-000
S-PARTS: CABLE: 2 HOUSING, 12P/12P, P=2.0mm, L=420mm, 28AWG,
1500.002147.00, 聯穎, W/TUBE, RoHS
65-0377-000
S-PARTS: PCBA: SBA45, IR Sensor Board, RoHS
65-0326-000
S-PARTS: PCBA: SBA51, RoHS
65-0328-000
S-PARTS: ASS'Y,SENSOR:SG-413JAV01,3P,P=2.0mm,L=120mm,RoHS
65-0380-000
S-PARTS:SHEET,CALIBRATION,UPPER,230X6.5X0.3T,MELINEX
329,210,(5PCS),RoHS
65-0255-000
S-PARTS: BEARING COVER HINGE, OD=13, ID=10, POM, WHITE, RoHS
65-0331-000
S-PARTS: Screw & Damper, For Optical module, (1SET=10PCS), RoHS
65-0332-000
S-PARTS: ASS'Y, OPTICAL, FACE UP, W/LAMP(002-3087-0),
W/INVERTER(005-0021-09), RoHS
65-0384-000
S-PARTS: ASS'Y, OPTICAL, FACE UP, RoHS
65-0312-000
S-PARTS: ASS'Y, LAMP, FACE UP, RoHS
65-0335-000
S-PARTS: INVERTER: 24V, 6mA, 35KHz, XAD355SR-1, TDK, RoHS
65-0336-000
S-PARTS: ASS'Y, OPTICAL, FACE DOWN, W/LAMP( 002-3343-0),
W/INVERTER (005-0022-09), RoHS
65-0337-000
S-PARTS: ASS'Y, OPTICAL, FACE DOWN, RoHS
65-0398-000
S-PARTS: ASS'Y, LAMP, FACE DOWN, RoHS
65-0339-000
S-PARTS: INVERTER:24V,6mA,35KHz,XAD3552,TDK,WIRE:200mm,RoHS
65-0340-000
S-PARTS: ASS'Y, PAPER GUIDE, LOWER,W/O LAMP(002-3343-0),RoHS
65-0341-000
S-PARTS: BELT, 58T, MXL, W=4.8, (10PCS), RoHS
65-0250-000
S-PARTS: ASS'Y, MOTOR, RoHS
65-0343-000
S-PARTS: ASS'Y, RELEASE HOOK, RoHS
65-0395-000
S-PARTS: ASS'Y, ADF ROLLER, RoHS
65-0254-000
S-PARTS: ROLLER, FEED, PAPER OUT, φ14.5, EPDM, 298.5, RoHS
65-0347-000
S-PARTS: BELT, 65T, MXL, W=4.8, (10PCS), RoHS
65-0249-000
S-PARTS: ROLLER, FEED, PAPER IN, φ14.5, EPDM, 316.25, RoHS
65-0349-000
S-PARTS: IDLE ROLLER, φ10.4x16, (8 PCS), RoHS
65-0350-000
S-PARTS: BELT, 68T, MXL, W=4.8, (10PCS), RoHS
65-0351-000
S-PARTS: IDLE PULLEY, 11x25, POM+鐵氟龍, (1SET=10PCS), RoHS
65-0352-000
S-PARTS: MOUNT, IDLE SECC, (1SET=10PCS), RoHS
65-0404-000
S-PARTS: ASS'Y, COVER TOP UNIT, RoHS
65-0258-000
S-PARTS: ASS'Y, ADF INPUT TRAY
65-0305-000
S-PARTS: ASS'Y, UPPER HOUSING, RoHS
65-0356-000
S-PARTS: FFC CABLE:18P, P=1.0mm, L=160mm, FF-18-1.0-C-160D(4/4/8/8)AA,今皓, 兩端導體不同面, RoHS, (5 PCS)
65-0408-000
S-PARTS: PCBA, MB325 WITH FW (259-0147-1), RoHS
65-0256-000
S-PARTS: HOUSING, BOTTOM, ABS, 2.5t,337x168x100, SILVER, RoHS
65-0359-000
S-PARTS: ASS'Y, POWER S/W: GF037RA-090,驊 陞, 5P, P=2.5mm,
L=50mm, W/TUBE, RoHS
57-0105-000
S-PARTS: ASS'Y, PAPER OUTPUT TRAY
ACCESSORIES
65-0094-000
S-PARTS: ADAPTER:DESK-TOP,IEC 320-C6,3P,100~240Vac,4Vdc,
2A,48W,HEG42-240200-7L(A)LF, HITRON(海昌),CLASS I, ENER, RoHS
65-0413-000
S/W PACKAGE,RoHS
65-0365-000
S-PARTS: USB CABLE: USB A(M)/B(M), 4P, L=1850mm, UL2725
28AWG, SV-0411016, 昇文, COLOR:透明, W/CORE, RoHS
65-0182-000
S-PARTS: AC POWER CORD, EUR.(CEE), 2P+G. BASE, 16A/250V,
L=1800mm, 3C*0.75mm2, BLACK,良維, PG8B9CIJG0A-05B, RoHS
65-0097-000
S-PARTS: AC POWER CORD: US, 3P, 10A/125V, L=1800mm,
3C*18AWG, BLACK,良 維, PH8B2EDJF0A-05B, RoHS
65-0183-000
S-PARTS: AC POWER CORD, UK (BS/PSB),3 P, 3A/250V, L=1800mm,
3C*0.75mm2, BLACK,良 維, PG8B9X3JG0A-05B, RoHS
65-0369-000
FOAM, EPS, L:310x278x160,發泡倍率:62.5,白色, RoHS
65-0370-000
FOAM, EPS, R:310x278x160,發泡倍率: 62.5,白色, RoHS
65-0420-000
CARTON: 470x290x340, A/F, RoHS
Xerox DocuMate 272 Spare Parts List:
XEROX DocuMate 272 GREEN
SERVICE PARTS TABLE
VISIONEER
P/N
DESCRIPTION
65-0320-000
S-PARTS: ASS'Y, PAPER GUIDE, UPPER, W/O LAMP (002-3087-0), RoHS
65-0322-000
S-PARTS: PCBA: LBA69, RoHS
65-0299-000
S-PARTS: CABLE: 2/2 HOUSING, 14P+6P, P=2.0mm, L=420mm, 28AWG,聯
65-0324-000
S-PARTS: CABLE:2 HOUSING, 12P/12P
65-0325-000
S-PARTS: PCBA:SBA45, IR Sensor Board,RoHS
65-0326-000
S-PARTS: PCBA: SBA51, RoHS
65-0327-000
PARTS: CABLE: 3P/4P, P=2.0mm, L=730mm, 28AWG, T105005020503, TC&C,
W/TUBE
65-0328-000
S-PARTS: ASS'Y,SENSOR:SG-413JAV01,勁昇,3P,P=2.0mm,L=120mm,RoHS
65-0380-000
S-PARTS: SHEET,CALIBRATION,UPPER,230X6.5X0.3T,MELINEX 329,210
65-0255-000
S-PARTS: BEARING COVER HINGE, OD=13, ID=10, POM, WHITE, RoHS
65-0331-000
S-PARTS: Screw & Damper, For Optical module, (1SET=10PCS), RoHS
65-0332-000
S-PARTS: ASS'Y, OPTICAL, FACE UP,W/LAMP (002-3087-0),W/INVERTER
65-0333-000
S-PARTS: ASS'Y, OPTICAL, FACE UP, RoHS
65-0312-000
S-PARTS: ASS'Y, LAMP, FACE UP, RoHS
65-0335-000
S-PARTS: INVERTER: 24V, 6mA, 35KHz, XAD355SR-1, TDK, RoHS
65-0336-000
S-PARTS: ASS'Y,OPTICAL,FACE DOWN,W/LAMP(002-3343-0)w/INVERTER
65-0337-000
S-PARTS: ASS'Y, OPTICAL, FACE DOWN, RoHS
65-0298-000
S-PARTS: ASS'Y, LAMP, FACE DOWN, RoHS
68-0339-000
S-PARTS: INVERTER: 24V,6mA,35KHz,XAD355-2,TDK,WIRE:200mm,RoHS
65-340-000
S-PARTS: ASS'Y, PAPER GUIDE, LOWER, W/O LAMP (002-3343-0), RoHS
65-0341-000
S-PARTS: BELT, 58T, MXL, W=4.8, (10PCS), RoHS
65-0250-000
S-PARTS: ASS'Y, MOTOR, RoHS
65-0343-000
S-PARTS: ASS'Y, RELEASE HOOK, RoHS
65-0395-000
S-PARTS: ASS'Y, ADF ROLLER, RoHS
65-0254-000
S-PARTS: ROLLER, FEED, PAPER OUT, φ14.5, EPDM, 298.5, RoHS
65-0347-000
S-PARTS: BELT, 65T, MXL, W=4.8, (10PCS), RoHS
65-0249-000
S-PARTS: ROLLER, FEED, PAPER IN, φ14.5, EPDM, 316.25, RoHS
65-0349-000
S-PARTS: IDLE ROLLER, φ10.4x16, (8 PCS), RoHS
65-0350-000
S-PARTS: BELT, 68T, MXL, W=4.8, (10PCS), RoHS
65-0351-000
S-PARTS: IDLE PULLEY, 11x25, POM+鐵氟龍, (1SET=10PCS), RoHS
65-0352-000
S-PARTS: MOUNT, IDLE SECC, (1SET=10PCS), RoHS
65-0353-000
S-PARTS: ASS'Y, TOP COVER
57-0104-000
S-PARTS: ASS'Y, ADF INPUT TRAY
65-0305-000
S-PARTS: ASS'Y, UPPER HOUSING, RoHS
65-0356-000
S-PARTS: FFC CABLE: 18P, P=1.0mm, L=160mm, FF-18-1.0-C-160-D
(4/4/8/8)AA
65-0357-000
S-PARTS: PCBA, MB325 WITH FW (259-0148-1), RoHS
65-0358-000
S-PARTS: HOUSING, BOTTOM, ABS, 2.5T, 337x168x100, SILVER
65-0359-000
S-PARTS: ASS'Y, POWER S/W: GF037RA-090
57-0105-000
S-PARTS: ASS'Y, PAPER OUTPUT TRAY
65-0361-000
S-PARTS: ASS'Y, INPUT TRAY, REAR, RoHS
65-0362-000
S-PARTS: PCBA, SBA53, BACK-SENSOR, RoHS
ACCESSORIES
65-0094-000
S-PARTS: ADAPTER: DESK-TOP, IEC 320-C6, 3P 100-240VAC, HITRON
65-0364-000
S/W PACKAGE, RoHS
65-0365-000
S-PARTS: USB CABLE:USB A(M)/B(M),4P,L=1850mm,UL2725 28AWG,SV-
65-0182-000
S-PARTS: AC POWER CORD, EUR.(CEE), 2P+G.
65-0097-000
S-PARTS: AC POWER CORD:US,3P,10A/125V,L=1800mm,3C*18AWG,BLK
65-0183-000
S-PARTS: AC POWER CORD UK
65-0369-000
FOAM, EPS, L:310x278x160,發泡倍率:62.5,白色, RoHS
65-0370-000
FOAM, EPS, R:310x278x160,發泡倍率: 62.5,白色, RoHS
65-0371-000
CARTON: 470x290x340, A/F, RoHS
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