Apple Color Onescanner Service Manual

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Apple Color OneScanner

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Basics

Color OneScanner

Basics Overview - 1

Overview

The Color OneScanner is a
24-bit one-pass flatbed
scanner with a scanning
resolution up to 1200 dpi.

The Color OneScanner uses a
tri-linear CCD to capture
eight bits each of red, green,
and blue in one pass. As a
one-pass scanner, it
samples all three colors at
the same time, resulting in
truer color and better
registration than a scanner
that makes separate passes
for each primary color.

Basics Overview - 2

Features

The Color OneScanner offers

• Selectable 75- to 1200-dpi scanning resolution

• Scanning of documents up to 8.5 x 14 inches

• User-controlled scanning or Autoscan

• ColorSync color-matching software

• Compatibility with all Macintosh computers with 68020
processor or greater

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Specifications

Color OneScanner

Specifications Characteristics - 1

Characteristics

Scanner T ype

Maximum Document Size

Speed

Grayscale

Dropout Color

Interface

Flatbed

8.5 by 14 in.

13 ms/line at 300 dpi

256 levels (8 bits per pixel)

White

SCSI

Specifications Electrical - 2

Electrical

Line V oltage

Frequency

120 VAC ±10% (US and Canada)
100/120/200/220/240 VAC ± 10% (Universal)

58–62 Hz (US and Canada)
48–62 Hz (Universal)

Specifications Physical - 3

Physical

Size

Weight

Height: 4.3 in. (110 mm)
Width: 13.4 in. (340 mm)
Depth: 21.5 in. (545 mm)

23 lb. (10.45 kg)

Specifications Environmental - 4

Environmental

Operating Temperature

Storage Temperature

Relative Humidity

50–104°F (10–40°C)

–40 to 117°F (–40 to 47°C)

20–95% noncondensing

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Troubleshooting

Color OneScanner

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 Scanner Lamp Versions/ - 2

Scanner Lamp Versions

This procedure covers how to differentiate between 8-bit
(grayscale) and 24-bit (color) scanner lamps.

When a single error light is flashing, check to see whether the
lamp is giving off a green or white light.

• If the light has a green cast to it, an 8-bit lamp has incorrectly
been installed.

• If the light is bright white, the correct lamp is installed.
Proceed with the symptom charts.

Troubleshooting Symptom Charts /LED Error Messages - 3

Symptom Charts

LED Error Messages

LED blinks once 1 Check to see if main lamp is giving off a green or white light.

If light is green, incorrect lamp is installed. Replace lamp.
2 Replace logic board.
3 Replace power supply.
4 Replace power supply cable.

LED blinks twice 1 Clean glass cover assembly.

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

holder.
4 Replace lamp.
5 Replace optical assembly.

Troubleshooting Symptom Charts /LED Error Messages - 4

LED blinks three
times

Power-on self-test
does not find error
(LED does not blink);
scanner is not
capturing image
correctly

1 Check motor carrier assembly.
2 Check drive belt assembly.
3 Check gears and pulleys.
4 Check limit switch assembly.
5 Check home position switch assembly.
6 Check carrier shaft; it should not be bent.

Replace optical assembly.

Troubleshooting Symptom Charts /Miscellaneous - 5

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

international models).
4 Check interlock switch with multimeter. Replace switch if it

is not opening and closing.
5 Check fuses FU1, FU2, and FU3 on power supply board.
6 Replace logic board.
7 Replace power supply.
8 Replace transformer.

Troubleshooting Symptom Charts/Miscellaneous - 6

Optical assembly does not move

Optical assembly
moves once and then
does not move

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

Clean or replace gears.

1 Check limit switch for continuity.
2 Check drive belt.
3 Check drive belt pulleys.
4 Check carrier motor.

Troubleshooting Symptom Charts/Miscellaneous - 7

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

Fluorescent lamp won’t light or is dim

1 Verify version of scanner application software.
2 Verify that scanner driver is present.
3 Verify version of scanner driver.
4 Check SCSI connection.
5 Verify that host computer has enough memory.
6 Verify that system software is version 7.0 or above.
7 Verify SCSI ID of scanner.
8 Verify scanner SCSI termination.
9 Turn on scanner and reboot computer.
10 Replace logic board.

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

holder.
3 Replace lamp.
4 Replace flexible cable.
5 Replace optical assembly.
6 Replace logic board.

Troubleshooting Symptom Charts/Miscellaneous - 8

Scan command does not execute

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 unused device number.

Scanner is factory-preset at 2. Do not use 7, 8, 9, or 0.
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 optical assembly.
5 Replace logic board.

1 Check interface connector.
2 Replace optical assembly.
3 Check fuse FU1 on logic board.
4 Replace logic board.

Troubleshooting Symptom Charts /Miscellaneous - 9

Incorrect image on host screen

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

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T ak e Apart

Color OneScanner

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 Lift the glass cover

assembly from the rear,

Glass Cover Assembly

and at the same time
press in and release the
two retaining clips.

Retaining Clips
(both sides)

Take Apart Glass Cover Assembly - 4

Start Scan

Board

Scan Switch Cable

Glass Cover
Assembly

Caution:

When
removing the glass cover
assembly, make sure you
don’t damage the start
scan board.

3 Raise the glass cover

assembly to 90° and
disconnect the scan
switch cable from the
start scan board.

4 Remove the glass cover

assembly.

Take Apart Glass Cover Assembly - 5

5

Replacement Note:

Before returning a
damaged glass cover
assembly, remove the
start scan board. Install
the start scan board on
the new glass cover
assembly.

Start Scan

Board

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 Pull the wire handle and

Retaining Screw

Lamp

Assembly

loosen the lamp
assembly retaining
screw.

2 Remove the lamp

assembly

Take Apart Optical Assembly - 8

3 Remove the two

Front Plate

retaining screws and
lift out the front plate.

Replacement Note:

Place the screws in the
front plate before
reinstalling the plate in
the scanner. Carefully
lower the plate down and
tighten the screws.

Take Apart Optical Assembly - 9

4 Push the optical

assembly to the center

Left Guide Rail

over the cutout in the
left guide rail.

Take Apart Optical Assembly - 10

5 Remove the two

retaining screws, the
trigger arm, and the
ground clip.

6 Slide the limit switch

assembly to the side.

Ground Clip

Limit Switch Assembly

Take Apart Optical Assembly - 11

7 Loosen the tension lock

screw.

Pulley Lever

Tension Lock Screw

8 Slide the pulley lever

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

9 Remove the belt from the

front pulley gear.

Take Apart Optical Assembly - 12

10 Remove the two

Front Retaining Bracket

retaining screws and the
carrier shaft front
retaining bracket.

Take Apart Optical Assembly - 13

11

Caution:

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

Optical Assembly

Lift the shaft until it
clears both support
brackets and pull the
shaft slightly to the
right.

12 Free the left side of the

optical assembly from
the left guide rail.

Take Apart Optical Assembly - 14

13 Using a small flat-blade

screwdriver, disconnect
the flex cable.

14 Remove the cable from

the ferrite bead and the

Optical Assembly

Ferrite Bead

Flex Cable

optical assembly.

Take Apart Optical Assembly - 15

15 Lift the optical block

from the scanner.

Carrier

Stopper

Sleeve

Carrier Shaft

Optical Block

16 Slide the carrier shaft

out of the optical block.

Note:

Keep the carrier
stopper sleeve with the
shaft.

Take Apart Optical Assembly - 16

17 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

• Optical assembly

Inverter Assembly

Caution

precautions in Bulletins/
Safety.

.

: Review the ESD

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 Using a flat-blade

screwdriver unlatch the
optical board cover.

Optical Board

Cover

Caution:

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

Take Apart Inverter Assembly - 20

2 Disconnect cable

connector CN1 from the

Optical

Board

CN1

optical board.

3 Remove the two screws

and the inverter.

4 Slide the connector

mounting plate toward
the inverter.

5 Lift and remove the

plate.

Connector

Mounting

Plate

Inverter

Take Apart Carrier Motor - 21

Carrier Motor

Before you begin, remove
the following:

• Top cover

• Glass cover assembly

• Optical assembly

Carrier Motor

Caution

precautions in Bulletins/
Safety.

.

: Review the ESD

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

connector from the
power supply board.

Motor Plate

Cable Retainer

Cable Connector

4 Unhook the cable

retainer.

5 Remove the three

mounting screws and
lift out the motor plate.

Take Apart Carrier Motor - 24

6 Remove the E-clip and

E-Clip

washer.

7 Slide the front gear

Front Gear Pulley

pulley up and off the
pulley spindle.

8 Remove the remaining

three motor mounting
screws and the carrier
motor.

Replacement Note:

Install the motor onto
the carrier assembly as
shown.

Carrier Motor

Take Apart Transformer - 25

Transformer

Transformer

Before you begin, remove
the following:

• Top cover

• Glass cover assembly

• Optical assembly

• Carrier motor

Caution

precautions in Bulletins/
Safety.

: Review the ESD

Take Apart Transformer - 26

1 Remove the three

mounting screws and
lift out the plate
assembly.

Plate Assembly

Take Apart Transformer - 27

AC Inlet Cover

CN5

Limit Switch Assembly

AC Switch

Cover

CN2

2 Remove the retaining

screw and slide the AC
inlet cover forward and
lift it out of the scanner.

3 Remove the AC switch

cover.

4 Using a small flat-blade

screwdriver, release the
retaining tabs and
disconnect connectors
CN2 and CN5 from the
power supply board.

5 Disconnect the cable

connector from the
limit switch assembly.

Take Apart Transformer - 28

6 Remove the three screws

Ground Straps

and two ground straps.

Take Apart Transformer - 29

7 Remove the two

remaining screws and
lift out the transformer.

Take Apart Transformer - 30

Transformer Bracket

Transformer

8 Remove the two

mounting screws and
separate the
transformer from the
transformer bracket.

Take Apart Transformer - 31

Power Select Switch

Transformer Bracket

Transformer

9 On universal

transformers only,
remove the two mounting
screws and separate the
power select switch
from the transformer
bracket.

Take Apart Power Supply Board - 32

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 - 33

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 - 34

3 Remove the three

mounting screws and the
left guide rail.

Ground Strap Bracket

4 Remove the two

mounting screws and the

Left Guide Rail

ground strap bracket.

Take Apart Power Supply Board - 35

5 Disconnect the five

Power Supply Board

Ground Wire

cable connectors from
the power supply board:

• CN1

• CN2

• CN3

• CN4

Ground Strap

CN5

CN4

• CN5

6 Remove the retaining

screw and detach the
power supply board and

CN3

CN2

CN1

ground wire.

Take Apart Power Supply Board - 36

Power Supply Board

CN5

CN4

CN3

Ground Wire

Ground Strap

CN2

CN1

Replacement Note:

A new
power supply board
includes the grounding
strap. Loosen the
grounding screw on the
new power supply board,
carefully move the
grounding strap, and
install the board and
strap in the scanner.

Take Apart Power Supply Board - 37

7 Remove the three self–

threading screws and
the two machine screws.

Power Supply Board

8 Remove the power

supply board.

Take Apart Logic Board - 38

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 - 39

1 Loosen the three captive

Bottom Cover

screws and remove the
bottom cover.

Take Apart Logic Board - 40

Optical Cable

Caution:

Do not let the
optical cable slide back
into the scanner. Tape it
to the chassis until you
can reinstall the logic
board.

2 Disconnect the four

cables from the logic
board.

Take Apart Logic Board - 41

3 Remove the four

mounting screws, and
remove the logic board.

Caution:

the metal case from the
logic board. You could
cause electrostatic
damage to the circuitry.

Do not remove

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Additional Procedures

Color OneScanner

Additional Procedures Selecting Voltage (Intl. Only) - 1

Selecting Voltage

Screw

Switch Cover

(Intl. Only)

No preliminary steps are
required before you begin
this procedure.

1 Remove the screw and

the switch cover.

Additional Procedures Selecting Voltage (Intl. Only) - 2

2 Using a coin or a flat-

blade screwdriver,
rotate the voltage
selector to match the
incoming voltage.

Voltage Selector

Replacement Note:

Make
sure you install the
appropriate fuse for the
new voltage setting.

Additional Procedures Power Supply Fuse - 3

Power Supply

FU3

FU2

FU1

Fuse

No preliminary steps are
required before you begin
this procedure.

Caution:

precautions in Bulletins/
Safety.

Review the ESD

Additional Procedures Power Supply Fuse - 4

Note:

To access fuses
FU2 and FU3, lift the
center of the left guide
rail housing and remove
it from the left guide
rail.

Left Guide Rail Housing

To access fuse FU1,
push in the tabs and

AC Switch Cover

remove the AC switch
cover.

Additional Procedures Power Supply Fuse - 5

Remove fuses FU1, FU2
AND FU3.

FU3

(3A)

FU2

(1A)

AC Switch

Cover

FU1

(2A)

Replacement Note:

Use a
replacement fuse with the
correct rating. FU2 and FU3
are glass fuses, and FU1 is a
fire-rated ceramic fuse.

Additional Procedures Lamp Replacement - 6

Lamp Replacement

No preliminary steps are
required before you begin
this procedure.

1 Lift the cover to the

vertical position.

2 Move the optical

assembly to the home
position by switching the
scanner on and then off.

3 Using a coin or flat-

blade screwdriver,
unscrew the lamp lock

Lamp Lock Button

button.

Additional Procedures Lamp Replacement - 7

4 Pull on the wire handle

Retaining Screw

and unscrew the lamp
assembly retaining

Wire Handle

screw.

5 Remove the lamp

assembly.

Additional Procedures Lamp Replacement - 8

6 Carefully push out the

lamp from the socket.

Additional Procedures Lamp Replacement - 9

Replacement Note:

When replacing the lamp
and lamp assembly,

Retaining Flange

make sure

• The lamp is free of
fingerprints. Use a

Lamp

soft cloth to wipe the
lamp 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.

• The wire handle is in
the down position.

Additional Procedures Lamp Replacement - 10

• The lamp lock button
is tight.

• The lamp lock button

Retaining Flange

activates the
interlock switches.

Lamp

Lamp Assembly

Additional Procedures Voltage Conversion - 11

Voltage

Transformer

Conversion

Before you begin, remove
the transformer.

Note:

When you remove the

transformer, do not remove
the transformer bracket
from the transformer.

Additional Procedures Voltage Conversion - 12

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.”

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Exploded V ie w

Color OneScanner

Exploded View 1

Top Coverw/ Glass

Scan Start Board

076-0592

Top Cover
949-0390

Shaft, Carrier

699-0514

Front Plate

Assembly
922-0331

949-0388

Lid Hinge
Assembly
076-0275

Cable Optical
922-0021

Optical Assy
661-0739

Lamp Holder
983-0008

Transformer

Assembly

915-0038 110V

915-0039 100/240V

Interior Cover

949-0226

Drive Belt
Assembly
076-0323

Carrier

Motor

957-0037

Assembly,

Carrier Motor

922-0017

Cover, Voltage Select

922-0402

Plate

AC Inlet Cover
949-0214

Shield Plate (L)
922-1196

*Fuses
See Parts List

Power Supply
661-0738

Bottom Cover
Assembly
949-0391

Logic Board 24Bit
661-0740

Logic Board Cover
948-0050