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)