Microtek SCANMAKER 4700 Glass Cleaning Instructions

Scanner Glass Cleaning Instructions Chassis Type III 9/17/2004

Glass Cleaning Instructions For:

SCANMAKER 3800

SCANMAKER 4800

A scanner is a precision optical instrument and
disassembling the scanner upper housing is a delicate
procedure. We do not recommend that you disassemble the
scanner’s upper housing assembly on your own because of
potential problems that may come up while trying to
disassemble & during the reassembly process. Technical
Support personnel are not trained in repair; therefore, if
you get in trouble, assistance for disassembly & during the
reassembly process is not available. Proceed at your own
risk!

Tools Needed:

Phillips Screw Driver
Flat Screw Driver or small pry bar
Needle Nose Pliers

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Scanner Glass Cleaning Instructions Chassis Type III 9/17/2004

Materials Recommended

Glass Cleaning Cloth
*Canned Air

Selecting A Work Area

It is important that you begin by planning where you will lay your disassembled parts.
Locate an area with a workbench, table or desk with plenty of space. Make sure that the
area is clear of any other parts from other devices, as the many screws and nuts can be
easily confused. We recommend that you lay a sheet or tablecloth on the surface you will
be working on. This will prevent tools, parts and screws from sliding around and falling
to the floor. This will also prevent any parts from scratching the surface of the work area.
See the illustration below for an example of a preferred work area.

Before You Start

In order to prevent any short-circuiting of the electronic chips on the scanners
motherboard, it is very important that you ground yourself by simply touching the metal
part or parts of your PC. Make sure that the area you touch on your PC is bare metal and
not coated with paint or plastic. This will allow for any static electricity to discharge
from your body.

Note: Make sure that the scanner power cable is disconnected from the back of
the scanner at this point.

Cleaning the Scanner’s Glass Bed

The best way to clean the scanner glass bed is with a clear glass cleaner solution. Make
sure you do not use the blue, red, yellow or any other color dye solutions. Using color
dye solutions can form streaks on the scanners glass bed. Use the clear solutions for best
results. You can also use a 50/50 solution mix distilled water and pure alcohol. Also use
a soft cloth and avoid all abrasive material such as sponges and rough paper towels.

Cleaning Under Side of Glass Bed

To clean the underside of your scanners glass bed, please make sure that it is absolutely
necessary to do this. If cleaning the top of the scanner glass bed was not sufficient you
will need to open your scanners upper housing in order to be able to clean the underside
of the scanners glass bed.

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Scanner Glass Cleaning Instructions Chassis Type III 9/17/2004

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Removing the Scanners Lid

Removing the scanners lid is probably the easiest part of these instructions. Simply open
the scanner lid to a 90 angle and lift upward to remove the lid. (See illustration below.)

Removing the Scanners Upper Outer Housing

Most of our scanner models have two Phillips head screws holding down the upper
housing. You can locate the phillips screws by removing the scanners lid off the scanner.
You will notice the phillips screws inside of the receptacles where the scanners lid posts
(hinges) are inserted. (See illustration below.)

otice the Phillip head
screws located inside the
scanner lid receptacles.

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Scanner Glass Cleaning Instructions Chassis Type III 9/17/2004

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1. Remove the Phillips head screws inside of the receptacles where the scanners lid posts
(hinges) were inserted.

Note: Do not use screwdrivers with magnetic or magnetized tips. Using
magnetized tools around the scanners circuit boards may damage the circuitry,
therefore rendering your scanner useless.

2. You will need to pry open the scanners upper housing. In order to do this without
damaging the scanner we will need a flat head screw driver or a very small pry bar.
Position the front of the scanner facing away from you on the workbench.
(See illustration below.)

Front of scanner

ack of scanner

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Scanner Glass Cleaning Instructions Chassis Type III 9/17/2004

B

r

H

3. Take your flat head screw driver or small pry bar and locate the area immediately
below the lid hi d receptacles. Take your flat head screwdriver and insert it between the
upper and lower housing. (See illustration below.)

Carefully insert the
screwdriver’s flat tip
and pry it in-between
the upper and the lower
housing just below the
lid hinge receptacles.

4. Once the flat head screwdriver has been inserted between the upper and lower
housing, rotate the screwdriver half a turn clockwise and then turn the screwdriver
counter clock wise another half a turn, in order to pry open or separate the upper housing
from the lower housing. (See illustration below.)

inge Receptacle

ack of scanne

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Scanner Glass Cleaning Instructions Chassis Type III 9/17/2004

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Warning: Make sure to select an area where the scanner’s motherboard won’t be
in the way when you insert the screwdriver or pry bar. If you insert your prying
tool into the motherboard of the scanner you may damage the circuitry, rendering
the scanner useless.

Note: A good indication that this has happened is that you will here a clicking or
snapping sound as the interior plastic clips are released by the force being used
to pry the scanners upper housing with the screwdriver or pry bar.

5. Once the scanners upper housing has been released lift the scanners upper housing (at
the rear of the scanner) upward about 1 to 2 inches. Then simply pull or push the upper
housing forward or from the back towards the front. Then lift the upper housing upward
to remove. (See illustration below.)

ack of scanner

Front of scanner

Lift Up

Carefully lift the scanners upper housing a few inches and
then push the upper housing forward. This will clear or
release the upper housing from the lower housing clips.
Then simply lift the upper housing out of the way.

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Scanner Glass Cleaning Instructions Chassis Type III 9/17/2004

Assembling the Upper Housing

1. Before putting the upper housing assembly together, it may be a good time for you to
clean the interior si de of the scanners glass bed. Clear glass cleaners and a soft cloth are
the recommended materials to clean the scanners glass bed. Using a clear solution will
prevent streaks from forming on your scanners glass bed.

2. Locate and find the clips and the clip receptacles on the upper and lower housing.
They clip and receptacles will need to be aligned correctly for proper assembly of the
upper and lower housing.

Note: Illustration below demonstrates and shows the scanner clips and scanner
clip receptacles. The upper and lower housing clips need to be inserted into the
groove in order for the scanner upper and lower housing to align properly. (See
illustrations below & page 8.)

Front of scanner

Lower Housing, front clip

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receptacles

Scanner Glass Cleaning Instructions Chassis Type III 9/17/2004

Upper Housing, front clips

3. Now take the upper housing and align with the bottom part of the scanner housing.
Then lift the rear of the scanner’s upper housing about one inch and slide forward until
the front of the upper housing drops about half an inch. Then pull the upper housing
backward until it comes flush with the scanners lower housing. Once the upper and
lower housing are aligned press firmly downward to allow the plastic clips to fasten and
connect the upper and lower scanner housing. (See illustration below.)

The upper and lower housing

clips need to be inserted into the

groove in order for the scanner

upper and lower housing to

align properly.

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Fasten the Phillips head screws

inside of the receptacles where

the scanners lid posts (hinges)

were inserted, in order to

secure the upper and lower

housing.

Scanner Glass Cleaning Instructions Chassis Type III 9/17/2004

4. To fasten the scanner’s upper and lower housing replace the two Phillips screws that
were removed from the lids receptacles at the back of the scanner. Then position the
scanner lid to a 90 angle over the l id receptacles at the rear of the scanner and insert the
lid back in place.

Note: Prior to reconnecting the scanner to you computer, make sure to inspect
the interior of the scanner through the scanners glass bed and check for any loose
or pinched wires.

Last Updated By: Alex Licea 9 of 9 Last Updated On: 8/17/04