Apple Scanner Products Service Manual

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Apple Scanners

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Specifications

Apple Scanners

Specifications Characteristics - 1

Characteristics

Scanner T ype

Maximum Document Size

Speed

Grayscale

Dropout Color

Interface

Flatbed

8.5 by 14 in.

20.4 sec. for a 300-dpi scan measuring 8.5 by 11 in.

16 levels (4 bits per pixel)

Green

SCSI

Specifications Settings - 2

Settings

Contrast

Brightness

Threshold Values

Gray-Map

Scan Selections

Halftone Techniques

Up to 8 (specified by user)

Up to 16 (specified by user)

Up to 16 (specified by user)

More light detail, normal detail, more dark detail

Line art, halftone, grayscale

Spiral, bayer, 2 by 2, line, user-definable patterns, and adaptive

dithering to grayscale data that has been scanned.

Specifications Electrical - 3

Electrical

Line V oltage

Frequency

120 VAC ±10%

58–62 Hz

Specifications Physical - 4

Physical

Size

Weight

Height: 4.4 in. (11.2 cm)
Width: 13.6 in. (34.5 cm)
Depth: 21.8 in. (55.4 cm)

20 lb. (9.1 kg)

Specifications Environmental - 5

Environmental

Operating Temperature

Storage Temperature

Relative Humidity

32–104°F (0-40°C)

–40 to 149°F (–40 to 65°C)

5–95% noncondensing

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Troubleshooting

Apple Scanners

Troubleshooting General/ - 1

General

The Symptom Charts included in this chapter will help you
diagnose specific symptoms related to your product. Because cures
are listed on the charts in the order of most likely solution, try
the first cure first. Verify whether or not the product continues to
exhibit the symptom. If the symptom persists, try the next cure.
(Note: If you have replaced a module, reinstall the original module
before you proceed to the next cure.)

If you are not sure what the problem is, or if the Symptom Charts
do not resolve the problem, refer to the Flowchart for the product
family.

For additional assistance, contact Apple Technical Support.

Troubleshooting Symptom Charts /Miscellaneous - 2

Symptom Charts

Miscellaneous

Power lamp not on; machine dead

1 Plug in power cord.
2 Close lamp cover and turn button clockwise.
3 Check for correct setting of voltage selector (on universal

models).

4 Check interlock switch with multimeter; replace if switch is

not opening and closing.
5 Check fuses FU1, FU2, and FU3 on power supply board.
6 Check fuse 1 on logic board (4-bit only).
7 Replace logic board.
8 Replace power supply.
9 Replace transformer.

Troubleshooting Symptom Charts /Miscellaneous - 3

Optical assembly does not move

Optical assembly moves once, then does not move

System does not boot
or locks up during
transfer of data over
SCSI bus

1 Check and clean or replace belt.
2 Check belt tension. Belt should be tight with no slack.
3 Check for damage to gears or buildup of foreign material;

clean or replace gears.

Check limit switch for continuity.

Perform “Logic Board Modification” (see Additional
Procedures).

Troubleshooting Symptom Charts /Miscellaneous - 4

AppleScan program
crashes during
middle of scanning
operation, or
computer hangs

Fluorescent lamp won’t light or is dim

1 Verify version of AppleScan.
2 Replace power supply board.
3 Replace logic board.

1 Check lamp holder connector.
2 Check that label of fluorescent lamp faces down (into lamp

holder).
3 Replace lamp.
4 Check flexible cable.
5 Replace inverter (or optical assembly).

Troubleshooting Symptom Charts /Miscellaneous - 5

Scan command not executed

Image not clean; dark or light spots

Scanning performed,
but image doesn’t
reach host computer

1 Check external cable connections.
2 Reset SCSI select switch on scanner to an unused device

number (factory preset at 2). Do not use 7 or 8.
3 Check that SCSI cable terminates correctly.
4 Check fuse on logic board.
5 Replace logic board.

1 Clean glass with water and soft, lint-free cloth.
2 Adjust contrast or threshold settings on application.
3 Replace lamp.
4 Replace logic board.
5 Replace optical assembly.

1 Check interface connector.
2 Replace optical assembly.
3 Check fuse on logic board.
4 Replace logic board.

Troubleshooting Symptom Charts /Miscellaneous - 6

Incorrect image on host screen

1 Clean glass with water and soft, lint-free cloth.
2 Replace optical assembly.

Troubleshooting Symptom Charts /Apple OneScanner for Windows - 7

Apple OneScanner for Windows

Scanner does not operate in Windows environment

1 Check connections of SCSI cable.
2 Check that SCSI terminator is installed.
3 Replace AT-to-SCSI Host Adapter card.
4 If you determine that there is a software problem, contact

the Apple Assistance Center.

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T ak e Apart

Apple Scanners

Take Apart Top Cover - 1

Top Cover

Top Cover

No preliminary steps are
required before you begin
this procedure.

1 Press the clips and lift

the top cover.

Take Apart Glass Cover Assembly - 2

Glass Cover

Glass Cover

Assembly

Assembly

Before you begin, remove
the top cover.

Caution:

precautions in Bulletins/
Safety.

1 Loosen the three captive

Review the ESD

screws.

Take Apart Glass Cover Assembly - 3

2 While lifting the glass

cover assembly from

Glass Cover Assembly

the rear, use a flat­blade screwdriver to
press in and release the
two retaining clips.

Retaining Clips
(both sides)

Take Apart Glass Cover Assembly - 4

Start Scan Board

Scan Switch Cable

Caution:

Make sure that
you don’t damage the
protruding components
on the start scan board
while performing this
procedure.

3 Raise the glass cover

assembly to 90°,
disconnect the scan
switch cable from the
start scan board, and
remove the glass cover
assembly.

Take Apart Glass Cover Assembly - 5

4

Replacement Note:

When you replace a
damaged glass cover
assembly, remove the
start scan board and
install the board on the

Start Scan Board

new glass cover
assembly.

Take Apart Optical Assembly - 6

Optical Assembly

Before you begin, remove

Optical Assembly

the following:

• Top cover

• Glass cover assembly

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Optical Assembly - 7

1 While pulling the wire

Retaining Screw

handle, loosen the
retaining screw and

Lamp
Assembly

remove the lamp
assembly.

Replacement Note:

Make
sure the left side of the
lamp assembly engages
the left retaining
flanges properly.

Take Apart Optical Assembly - 8

2 Remove the two

Front Plate

retaining screws and
lift out the front plate.

Take Apart Optical Assembly - 9

3 Push the optical

assembly to the center of

Left Guide Rail

travel and over the
cutout in the left guide
rail.

Take Apart Optical Assembly - 10

4 Remove the two

retaining screws (and
ground strap, for 8-bit
scanner only) and slide

Ground Strap
(8-bit scanner only)

Limit Switch Assembly

the limit switch
assembly to the side.

Take Apart Optical Assembly - 11

5 Loosen the tension lock

screw.

Pulley Lever

6 Slide the pulley lever

forward to relieve belt
tension and remove the
belt from the rear
pulley gear.

Tension Lock Screw

7 Remove the belt from the

front pulley gear.

Take Apart Optical Assembly - 12

8 Remove the two

retaining screws and the
carrier shaft front

Front Retaining Bracket

retaining bracket.

Take Apart Optical Assembly - 13

Optical Assembly

Caution:

Do not lift the
optical assembly too
high, or you may damage
the flex cable.

9 Lift the shaft until it

clears both support
brackets; then pull the
shaft slightly to the
right. Free the left side
of the optical assembly
from the left guide rail.

Take Apart Optical Assembly - 14

10 Disconnect the flex

cable and remove the
cable (and ferrite bead
on the 8-bit scanner
only) from the optical
assembly.

Ferrite Bead

Flex Cable

Take Apart Optical Assembly - 15

11 Lift the optical block

Carrier Shaft

Optical Block

from the scanner.

12 Slide the shaft out of the

optical block.

Note: Keep the carrier
stopper sleeve with the
shaft.

Take Apart Optical Assembly - 16

13 Using a small

Retaining Clip

screwdriver, pry off
the retaining clip and
remove the belt from the
optical assembly.

Take Apart Inverter Assembly - 17

Inverter Assembly

Before you begin, remove
the following:

• Top cover

• Glass cover assembly

Inverter Assembly

• Optical assembly

Caution:

precautions in Bulletins/
Safety.

Caution:

set screw. Loosening the
screw damages the factory
optical settings, and you
must replace the optical
assembly.

Review the ESD

Do not loosen the

Take Apart Inverter Assembly - 18

Note:

You do not have to
remove the drive belt
from the optical block.

Drive Belt

Take Apart Inverter Assembly - 19

1 Insert a flat-blade

screwdriver under one
side of the optical block
cover, and gently pry up

Optical Block Cover

until you hear a snap.
Perform the same
procedure on the other
side, and remove the
optical block cover.

Take Apart Inverter Assembly - 20

Connector

Mounting

Plate

CN1

CCD Board

Inverter

Caution:

Do not loosen
the two CCD retaining
screws. Loosening the
screws damages the
optical alignment, and
you must replace the
optical assembly.

2 Disconnect connector

CN1 from the CCD board.

3 Remove the two

mounting screws and let
the inverter drop.

4 Slide the connector

mounting plate to the
left, toward the
inverter, and lift the
right side of the plate.

Take Apart Carrier Motor - 21

Carrier Motor

Before you begin, remove
the following:

• Top cover

• Glass cover assembly

Carrier Motor

• Optical assembly

Caution:

precautions in Bulletins/
Safety.

Replacement Note:

the drive belt tensioning
spring and drive gear
pulleys now.

Review the ESD

Replace

Take Apart Carrier Motor - 22

1 Remove the two

retaining screws and the
front inside cover.

2 Remove the three

mounting screws and the

Left Guide Rail

left guide rail.

Take Apart Carrier Motor - 23

3 Disconnect the cable

Ground Straps

Cable Connector

connector from the
power supply Board.

4 Remove the retaining

screw and move the
ground straps out of the
way.

5 Remove the four

mounting screws and
lift out the carrier
block.

Carrier Block

Take Apart Carrier Motor - 24

6 Remove the E-clip and

E-Clip

washer, and slide the
front gear pulley up and
off the pulley spindle.

Front Gear Pulley

7 Remove the remaining

three motor mounting
screws and the motor.

Replacement Note:

Install the motor onto
the carrier assembly
with the motor cable
facing forward.

Carrier Motor

Take Apart Transformer - 25

Transformer

Transformer

Before you begin, remove
the following:

• Top cover

• Glass cover assembly

• Optical assembly

• Carrier block

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Transformer - 26

AC Inlet Cover

CN5

Limit Switch Assembly

AC Switch

Cover

CN2

1 Remove the retaining

screw and slide the AC
inlet cover to the right
and out of the scanner.

2 Remove the AC switch

cover.

3 Using a small flat-blade

screwdriver, push the
retaining tab toward the
connector and disconnect
the two cable connectors,
CN2 and CN5, from the
power supply board.

4 Disconnect the cable

connector from the
limit switch assembly.

Take Apart Transformer - 27

5 Remove the screws and

Ground Straps

ground straps.

Take Apart Transformer - 28

6 Remove the two

remaining screws and
lift out the transformer.

Take Apart Transformer - 29

Power Select Switch

Transformer Bracket

Transformer

7 Remove the two

mounting screws and
separate the
transformer from the
transformer bracket.

8 Remove the two

mounting screws and the
power select switch
from the transformer
bracket (on universal
transformers only).

Take Apart Power Supply Board - 30

Power Supply Board

Power Supply Board

Before you begin, remove
the following:

• Top cover

• Glass cover assembly

• Optical assembly

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Power Supply Board - 31

1 Remove the retaining

AC Inlet Cover

screw and slide the AC
inlet cover to the right
and out of the scanner.

AC Switch

Cover

2 Remove the AC switch

cover.

Take Apart Power Supply Board - 32

3 Remove the three

mounting screws and the
left guide rail.

Left Guide Rail

Ground
Strap
Bracket

4 Remove the two

mounting screws and the
ground strap bracket.

Take Apart Power Supply Board - 33

Note:

On the 8-bit

Power Supply Board

scanner, remove the
logic board (with metal
case) to allow removal of
the power cable
connector.

CN4

CN3

CN5

Ground Wire

CN2

CN1

5 Disconnect the five

cable connectors from
the power supply board:

• CN1

• CN2

• CN3

• CN4

• CN5

6 Remove the retaining

screw and detach the
ground wire.

Take Apart Power Supply Board - 34

7 Remove the three self-

tapping screws, the two
machine screws, and the

Power Supply Board

power supply board.

Take Apart On/Off Switch Assembly - 35

On/Off Switch

On/Off Switch Assembly

Assembly

Before you begin, remove
the following:

• Top cover

• Glass cover assembly

• Optical assembly

• Power supply board

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart On/Off Switch Assembly - 36

Remove the remaining screw
and the AC switch plate.

AC Switch Plate

Take Apart Logic Board - 37

Logic Board

No preliminary steps are
required before you begin
this procedure.

Logic Board

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Take Apart Logic Board - 38

1 Loosen the three captive

Bottom Cover

screws and remove the
bottom cover.

Take Apart Logic Board - 39

2 Remove the four

mounting screws, and

Logic Board

remove the logic board.

Take Apart Logic Board - 40

3 Lift the logic board to

gain access and
disconnect the four
cables.

Logic Board

4 Remove the logic board.

Caution:

Do not remove
the metal case from the
8-bit logic board. You
could cause ESD damage
to the circuitry.

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Service Source

Additional Procedures

Apple Scanners

Additional Procedures Selecting Voltage - 1

Selecting Voltage

Screw

Switch Cover

No preliminary steps are
required before you begin
this procedure.

1 Remove the screw and

the switch cover.

Additional Procedures Selecting Voltage - 2

2 Using a coin or a flat-

blade screwdriver,
rotate the voltage
selector to match the

Voltage Selector

incoming voltage.

Additional Procedures Logic Board Fuse - 3

Logic Board Fuse

Before you begin, remove
the logic board.

Logic Board Fuse

(1A)

Caution:

precautions in Bulletins/
Safety.

Note:

procedure on the 4-bit
scanner only. Return the 8­bit logic board (in its
shielded case) to Apple for
repairs.

Review the ESD

Perform this

Additional Procedures Logic Board Fuse - 4

Pry up one end of the fuse at
a time and remove the fuse.

Replacement Caution:

Use a replacement fuse
with the correct rating.

Logic Board Fuse

(1A)

Additional Procedures Power Supply Fuses - 5

Power Supply Fuses

No preliminary steps are
required before you begin
this procedure.

Caution

precautions in Bulletins/
Safety.

: Review the ESD

Additional Procedures Power Supply Fuses - 6

1 Lift the center of the left

guide rail housing and
remove it from the left
guide rail.

Left Guide Rail Housing

AC Switch Cover

Additional Procedures Power Supply Fuses - 7

2 Remove fuses 1A and 3A.

3 Push in the tabs and

remove the AC switch
cover.

4 Remove fuse 2A.

(3A)

(1A)

AC Switch

Cover

(2A)

Replacement Caution:

Use a replacement fuse
with the correct rating.

Additional Procedures Lamp Replacement - 8

Lamp Replacement

No preliminary steps are
required before you begin
this procedure.

1 Lift the cover to the

vertical position.

Note:

To move the optical
assembly to the home
position, switch the
scanner on and then off.

2 Using a coin or flat-

blade screwdriver,
unscrew the lamp lock

Lamp Lock Button

button.

Additional Procedures Lamp Replacement - 9

3 To remove the lamp

Retaining Screw

assembly, pull on the
wire handle and

Wire Handle

unscrew the retaining
screw.

Additional Procedures Lamp Replacement - 10

Metal End

of Lamp

Warning:

Do not pry the
glass area of the lamp.
The lamp could shatter.

4 Carefully pry one metal

end of the lamp to
disengage the lamp from
the socket.

5 Pull the lamp from the

other socket.

Additional Procedures Lamp Replacement - 11

Replacement Note:

When replacing the lamp
and lamp assembly,
make sure that

• The lamp is free of

Lamp

fingerprints. Wipe it
with a soft cloth prior
to inserting it into the
lamp assembly.

Lamp Assembly

• The printing on the

lamp faces the lamp
assembly.

• The lamp assembly

seats securely in the
left retaining flanges.

Additional Procedures Lamp Replacement - 12

• The wire handle is in

the down position
before you close the
lamp cover.

• The lamp lock button

Lamp

is tight. The button
activates interlock
switches.

Lamp Assembly

Additional Procedures Voltage Conversion - 13

Voltage

Transformer

Conversion

Before you begin, remove
the transformer.

Note:

Do not remove the
transformer bracket from
the transformer.

Additional Procedures Voltage Conversion - 14

To convert a 110 V
scanner (without the

Transformer

universal voltage
selector) to a universal
model, remove the
transformer and
bracket plate assembly
and install the universal
model transformer and
bracket plate assembly.

Replacement Note:

Before switching on
scanner power, refer to
“Selecting Voltage.”

Additional Procedures Logic Board Modification - 15

Logic Board Modification

Before you begin, remove
the logic board.

4-Bit Logic Board

Caution

precautions in Bulletins/
Safety.

Note:

procedure on the 4-bit
scanner only. Return the 8­bit logic board (in its metal
shield) to Apple for
modifications.

: Review the ESD

Perform this

Additional Procedures Logic Board Modification - 16

CA4

CA5
CA6

Caution:

Do not touch
other components on the
logic board.

Using diagonal cutters, cut
each lead of capacitors CA4,
CA5, and CA6 just above the
board surface and remove
the capacitors.

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Exploded V ie w

Apple Scanners

Exploded View 1

Logic Board

Carrier
Motor

Transformer

Top Cover

Power Supply Board

Glass Cover

Assembly

On/Off
Switch
Assembly

Optical
Assembly

Inverter
Assembly