Apple PowerBook Duo Minidock Service Manual

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Service Source

PowerBook Duo MiniDock

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Service Source

Basics

PowerBook Duo MiniDock

Basics System Overview - 1

System Overview

PowerBook Duo
System

The PowerBook Duo system
includes the following
products:

• PowerBook 200 Series
computer (PowerBook
Duo 210/230/250/

Duo Dock/

Duo Dock II/

Duo Dock Plus

Duo Floppy

Adapter

Duo MiniDock

Duo

210/230

250/270c

280/280c

270c/280/280c)

• PowerBook Duo Dock/Duo
Dock II/Duo Dock Plus

Basics System Overview - 2

• PowerBook Duo Floppy
Adapter

• PowerBook Duo MiniDock

This manual includes
information about the
PowerBook Duo MiniDock.

Figure: PowerBook Duo MiniDock

Basics System Overview - 3

For information about the floppy adapter and the PowerBook
200 Series computers, refer to the PowerBook 200 Series
manual. For information about the Duo Docks, refer to the
PowerBook Duo Dock manual.

Basics Repair Strategy - 4

Repair Strategy

Service the PowerBook Duo MiniDock through module
exchange and parts replacement. Customers can request on­site service from an Apple Authorized Service Provider Plus
(AASP+) Apple Assurance (US only), or request a courier
through the Apple Canada Technical Answerline (Canada
only). They can also choose carry-in service from an AASP.

Basics Repair Strategy - 5

Ordering

Apple Service Providers planning to support the product
covered in this manual may purchase Service modules and
parts to develop servicing capability. To order parts, use the
AppleOrder (US only) or ARIS (Canada only) system and
refer to “Service Price Pages.”

Large businesses, universities, and K-12 accounts must
provide a purchase order on all transactions, including
orders placed through the AppleOrder (US only) or ARIS
(Canada only) system.

USA Ordering

US Service Providers not enrolled in AppleOrder may fax
their orders to Service Provider Support (512-908-

8125) or mail them to

Basics Repair Strategy - 6

Apple Computer, Inc.
Service Provider Support
MS 212-SPS
Austin, TX 78714-9125

For US inquiries, please call Service Provider Support at
800-919-2775 and select option #1.

Canadian Ordering

Canadian Service Providers not enrolled in ARIS may fax
their orders to Service Provider Support in Canada
(1-800-903-5284). For Canadian inquiries, please call
Service Provider Support at 905-513-5782 and select
option #3.

Basics Warranty/AppleCare/ARIS - 7

Warranty/AppleCare/ARIS

US Only

The PowerBook Duo MiniDock is covered under the Apple
One-Year Limited Warranty. The AppleCare Service Plan is
also available for this product. Service Providers are
reimbursed for warranty and AppleCare repairs made to
this product. For pricing information, refer to “Service
Price Pages.”

Canada Only

The PowerBook Duo MiniDock is covered under first-year
AppleCare. The Extended AppleCare Service Plan is also
available for this product. Service Providers are
reimbursed for first-year warranty and Extended
AppleCare repairs made to this product. For pricing
information, refer to “Service Price Pages.”

Basics Self-Threading Screws - 8

Self-Threading Screws

Self-Threading
Screws

Caution:

installed self-threading
screws could damage the Duo
MiniDock.

The PowerBook Duo
MiniDock uses self­threading screws. When you
are replacing a self­threading screw, follow
these guidelines:

• Never overtighten self­threading screws.

Improperly

Basics Self-Threading Screws - 9

• Before tightening a self­threading screw, back the
screw off slightly to be
sure it is threaded
properly.

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Service Source

Specifications

PowerBook Duo MiniDock

Specifications Introduction - 1

Introduction

You can also find specifications information for this product in the

Spec Database, which you can access in one of three ways:

— Launch it directly by double-clicking the Apple Spec Database

runtime alias at the top level of the Main Service Source CD.

— Select "Apple Spec Database" from the Service Source drop-

down main menu.

— Click the Acrobat toolbar icon for the database, which is near

the right end of the toolbar with the letters "SP."

Specifications Processor - 2

Processor

Addressing

32-bit internal registers
32-bit address bus
32-bit data bus

Specifications Memory - 3

Memory

VRAM

512K VRAM
Supports all Macintosh monitors up to 16-in. color
Supports some VGA monitors with adapter and NuBus card
Supports 256 colors or shades of gray

Specifications I/O Interfaces - 4

I/O Interfaces

Docking Connector

Floppy Drive

SCSI

Internal 152-pin processor-direct slot (PDS) connector to

PowerBook Duo

32-bit expansion bus

HDI-20 port for external 1.4 MB floppy drive (MS-DOS

compatible)

HDI-30 SCSI port with 1.5 MB/sec. transfer rate
Supports up to five external SCSI devices
Includes built-in terminator
Connection to another computer requires HDI-30 SCSI system

cable

Specifications I/O Interfaces - 5

Apple Desktop Bus

Serial

Sound

Video

Modem

Apple Desktop Bus (ADB) port (recommend maximum of three

low-speed, synchronous ADB devices); mini DIN-4 connector

200 mA maximum current draw for all ADB devices

Two RS-422 serial ports; mini DIN-8 connectors

Monaural sound-in port (requires 20 dB attenuation cables and

adapters to accommodate audio equipment with line level
outputs)

Monaural sound output jack for external audio amplifier

DB-15 connector supports Macintosh and VGA monitors (requires

15-pin-to-VGA adapter)

Pass-through telephone jack for optional internal PowerBook
Express Modem RJ-11 domestic; mini DIN-8 international

Specifications Electrical - 6

Electrical

Power Supply

Universal AC power supply, 85–270 VAC
47–63 Hz, single phase input line frequency

Specifications Physical - 7

Physical

Dimensions

Weight

Height: 2.1 in. (53 mm)
Width: 10.6 in. (269 mm)
Depth: 3.2 in. (81 mm)

1.24 lb. (0.56 kg)

Specifications Environmental - 8

Environmental

Operating
Temperature

Storage
Temperature

Relative Humidity

Altitude

50–104° F (10–40° C)

–40 to 116° F (–40 to 47° C)

20–95% noncondensing

0–15,000 ft. (0–4722 m)

Specifications Other - 9

Other

Options

Slot for security cable
Modem expander (domestic or international telephone jack)

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Service Source

Troubleshooting

PowerBook Duo MiniDock

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/Startup - 2

Symptom Charts

Startup

RAM failure occurs
(eight-tone error
chord sequence
sounds after startup
chord)

Hardware failure
occurs (four-tone
error chord sequence
sounds after startup
chord)

1 Disconnect Duo MiniDock from PowerBook. Reboot and

troubleshoot computer only.

2 Replace Duo MiniDock logic board.

1 Disconnect Duo MiniDock from PowerBook Duo. Reboot and

troubleshoot computer only.

2 Replace Duo MiniDock logic board.

Troubleshooting Symptom Charts/Power - 3

Power

System doesn’t
respond

System
intermittently
crashes or locks up

1 Disconnect Duo MiniDock from PowerBook Duo. Reboot and

troubleshoot computer only.
2 Check all Duo MiniDock logic board cable connections.
3 Replace Duo MiniDock logic board.

1 Make sure system software is 7.1 or higher.
2 Make sure software is known-good.
3 Disconnect Duo MiniDock from PowerBook Duo. Reboot and

troubleshoot computer only.
4 Replace Duo MiniDock logic board.

Troubleshooting Symptom Charts/Video - 4

Video

No external display,
but computer
appears to operate
correctly

Raster or video
display problems at
external monitor

1 Adjust screen contrast.
2 Reseat video cable.
3 Replace video cable.
4 Try known-good external display. If now OK, replace and

troubleshoot original display.
5 Replace Duo MiniDock logic board.

1 Reseat video cable.
2 Replace video cable.
3 Try known-good external display. If now OK, replace and

troubleshoot original display.
4 Replace Duo MiniDock logic board.

Troubleshooting Symptom Charts/Floppy Drive - 5

Floppy Drive

Audio and video
present, but external
floppy drive does not
operate

Disk ejects while
booting; display
shows Mac icon with
blinking X

1 Try known-good floppy disk.
2 Check floppy drive cable connection.
3 Replace floppy drive cable.
4 Replace floppy drive.
5 Replace Duo MiniDock logic board.

1 Try known-good system disk.
2 Verify that mouse or trackball button is not stuck.
3 Check floppy drive cable connection.
4 Replace floppy drive cable.
5 Replace floppy drive.
6 Replace Duo MiniDock logic board.

Troubleshooting Symptom Charts/Floppy Drive

(Continued)

- 6

Floppy Drive

Disk does not eject 1 Switch off system. To eject disk, hold mouse or trackball

button down while you switch system on.
2 Insert straightened paper clip into hole next to drive opening

and eject disk.
3 Check floppy drive cable connection.
4 Replace floppy drive cable.
5 Replace floppy drive.
6 Replace Duo MiniDock logic board.

Disk initialization
fails

1 Verify that you are using correct media.
2 Try known-good floppy disk.
3 Check floppy drive cable connection.
4 Replace floppy drive cable.
5 Replace floppy drive.

(Continued)

Troubleshooting Symptom Charts/Floppy Drive

(Continued)

- 7

Read/write/copy
error

Floppy Drive

1 Verify that you are using correct media.
2 Try known-good floppy disk.
3 Check floppy drive cable connection.
4 Replace floppy drive cable.
5 Replace floppy drive.

(Continued)

Troubleshooting Symptom Charts/Hard Drive - 8

Hard Drive

Internal PowerBook
hard drive does not
operate

External hard drive
does not operate

Drive does not appear
on desktop

Disconnect Duo MiniDock from PowerBook Duo. Reboot and
troubleshoot computer only.

1 Check hard drive cable connection.
2 Replace hard drive cable.
3 Run Macintosh Hard Disk Test.
4 Use HD SC Setup to reinitialize drive.
5 Replace hard drive.
6 Replace Duo MiniDock logic board.

1 Restart system.
2 Verify that SCSI devices have unique addresses.
3 Use HD SC Setup to initialize drive.

Troubleshooting Symptom Charts/Peripherals - 9

Peripherals

Cursor does not
move, or moves
erratically

Cursor moves, but
clicking mouse
button has no effect

1 Simultaneously press <Command> <Control> <Power On> keys

to reset computer.
2 Check ADB connections.
3 Inspect and clean mouse, if necessary.
4 If mouse was connected to keyboard, try in ADB port. If OK,

replace keyboard.
5 Replace mouse.
6 Replace Duo MiniDock logic board.

1 Replace mouse.
2 Replace Duo MiniDock logic board.

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 10

No response to any
key on keyboard

Cannot double-click
to open application,
disk, or server

Peripherals

1 Press <Power On> key or power button.
2 Check keyboard cable connection.
3 Replace keyboard cable.
4 Replace keyboard.
5 Replace Duo MiniDock logic board.

1 Remove any multiple system files.
2 Inspect and clean mouse, if necessary.
3 Clear parameter RAM and reset mouse controls. To clear

PRAM, start system, listen for boot tone, and immediately

depress <Option> <Command> <P> and <R> keys.
4 If mouse was connected to keyboard, try in ADB port. If OK,

replace keyboard.
5 Replace mouse.
6 Replace Duo MiniDock logic board.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 11

After you connect
external SCSI device,
computer doesn’t boot

Known-good
ImageWriter,
ImageWriter II, or
LQ does not print

Peripherals

1 Switch on external SCSI device before starting computer.
2 Check cable connections.
3 Verify that standard Apple terminator terminates SCSI chain.
4 Verify that SCSI select switch setting on external device is

unique.
5 Try known-good external SCSI device.
6 Replace Duo MiniDock logic board.

1 Verify that System is 7.1 or later.
2 Verify that Chooser and Control Panel settings are correct.
3 Check cables.
4 Replace printer interface cable.
5 Try known-good printer.
6 Replace Duo MiniDock logic board.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 12

Known-good
LaserWriter does not
print

Peripherals

1 Verify that System is 7.1 or later.
2 Verify that Chooser and Control Panel settings are correct.
3 Check cables.
4 Replace printer interface cable.
5 Try known-good printer. If printer works, troubleshoot

network.
6 Replace Duo MiniDock logic board.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 13

Device connected to
external modem port
doesn’t work

Peripherals

1 Verify that External Modem is selected in PowerBook Control

Panel.
2 Verify that System is 7.1 or later.
3 Check cables.
4 Test device with known-good computer.
5 Disconnect Duo MiniDock from PowerBook and test device at

PowerBook external modem/printer port.
6 Replace Duo MiniDock modem interface card.
7 Replace Duo MiniDock logic board.

(Continued)

Troubleshooting Symptom Charts/Peripherals

(Continued)

- 14

I/O devices are
unrecognized or
garbage is
transmitted or
received

Peripherals

1 Verify that System is 7.1 or later.
2 Check cables.
3 Verify that SCSI devices are terminated properly.
4 Verify that SCSI select switch setting on external device is

unique and between 2 and 6.
5 Test device with known-good computer.
6 Replace Duo MiniDock logic board.

(Continued)

Troubleshooting Symptom Charts/Internal Modem - 15

Internal Modem

Internal modem
options do not appear
in CDEV

1 Verify that System is 7.1 or later.
2 Remove and reseat modem interface board.
3 Disconnect Duo MiniDock from PowerBook and test

PowerBook internal modem.
4 Replace modem interface board.
5 Replace Duo MiniDock logic board.

Troubleshooting Symptom Charts/Internal Modem

(Continued)

- 16

Modem does not
respond properly to
AT command set
instructions

Internal Modem

1 Verify that baud rate and data format settings of

communications application are compatible with internal

modem and remote modem.
2 Check phone cord connection and operation.
3 Verify that System is 7.1 or later.
4 Remove and reseat modem interface board.
5 Disconnect Duo MiniDock from PowerBook and test

PowerBook internal modem.
6 Replace modem interface board.
7 Replace Duo MiniDock logic board.

(Continued)

Troubleshooting Symptom Charts/Internal Modem

(Continued)

- 17

Strange mix of
characters appears
on screen

Modem interferes
with system sound

Internal Modem

1 Verify that baud rate and data format settings of

communications application are compatible with internal

modem and remote modem.
2 Check phone cord connection and operation.
3 Verify that System is 7.1 or later.
4 Remove and reseat modem interface board.
5 Disconnect Duo MiniDock from PowerBook and test

PowerBook internal modem.
6 Replace modem interface board.
7 Replace Duo MiniDock logic board.

1 Remove and reseat modem interface board.
2 Disconnect Duo MiniDock from PowerBook and test

PowerBook internal modem.
3 Replace modem interface board.
4 Replace Duo MiniDock logic board.

(Continued)

Troubleshooting Symptom Charts/Internal Modem

(Continued)

- 18

Modem does not
respond to incoming
call

Modem has no sound
output

Internal Modem

1 If computer is in sleep mode, verify that “Answer calls” is

selected in Remote Access Setup control panel.
2 Check phone cord connection and operation.
3 Disconnect Duo MiniDock from PowerBook and test

PowerBook internal modem.
4 Replace modem interface board.
5 Replace Duo MiniDock logic board.

1 Verify that Control Panel volume setting is 1 or higher.
2 Disconnect Duo MiniDock from PowerBook and test

PowerBook internal modem.
3 Replace modem interface board.
4 Replace Duo MiniDock logic board.

(Continued)

Troubleshooting Symptom Charts/Internal Modem

(Continued)

- 19

Modem connects but
does not communicate
with remote modem

Internal Modem

1 Verify that remote modem needs error correction (error

correction is internal modem default).
2 Type AT &Q0 to disable error correction.

(Continued)

Troubleshooting Symptom Charts/Miscellaneous - 20

Miscellaneous

Can’t connect/
disconnect MiniDock

Replace mechanical latch.

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Service Source

T ak e Apart

PowerBook Duo MiniDock

Take Apart Top Cover - 2

Top Cover

Before you begin,

Top Cover

• Shut down unit

• Disconnect PowerBook
Duo

• Disconnect cables

1 Using a T-6 torx driver,

remove the three self­threading torx screws
that secure the top
cover to the bottom
cover.

Take Apart Top Cover - 3

2

Note:

To separate the

top cover from the base,

Top Cover

Mechanical

Release Lever

you must first close the
mechanical release
lever. Push it in flush
with the top cover.

Carefully separate the
top and bottom covers
until the covers
disengage at the rear
mounting tabs.

Bottom Cover

Take Apart Mechanical Latch - 4

Mechanical Latch

Before you begin, remove
the top cover.

Mechanical Latch

Caution:

Duo MiniDock contains CMOS
devices that are very
susceptible to ESD damage.
Review the ESD precautions
in Bulletins/Safety.

The PowerBook

Take Apart Mechanical Latch - 5

1 Using a T-6 torx driver,

remove the two self­threading screws that

Mechanical Latch

secure the plastic
faceplate to the
mechanical latch.

2 Pull the faceplate

straight off the
mechanical latch.

Note:

Before returning a

defective mechanical latch,

Faceplate

replace the faceplate on the
mechanical latch alignment
posts.

Take Apart Mechanical Latch - 6

3 Using a T-6 torx driver,

remove the two self­threading torx screws
that secure the

Mounting Tab

mechanical latch and
logic board to the bottom
cover.

Mechanical
Latch

4 Pull away the flex cable

and lift off the
mechanical latch.

Replacement Note:

When
replacing the mechanical
latch on the logic board,
insert the two mounting tabs
on the latch through holes in
the flex cable.

Take Apart Logic Board - 7

Logic Board

Before you begin, remove
the following:

• Top cover

• Mechanical latch

Logic Board

Caution:

Duo MiniDock contains CMOS
devices that are very
susceptible to ESD damage.
Review the ESD precautions
in Bulletins/Safety.

The PowerBook

Take Apart Logic Board - 8

1 Slightly raise the front

Modem Interface Card

of the logic board and
pull the board out of the
bottom cover.

Logic Board

Screw Mounts

2 Disconnect the modem

interface card (if
installed) from
connector J6.

Replacement Note:

When
replacing the logic board,
be careful not to bend the
metal grounding tabs on the
bottom cover, and make sure
the logic board snaps onto
the two bottom-cover screw
mounts.

Take Apart Logic Board - 9

Flex Circuit
Stabilizer

Tie Wrap

PDS Interface Cable

Replacement Caution:

Before returning a defective
logic board, always install
the flex circuit stabilizer on
the PDS interface cable.
Remove the flex cable
stabilizer from the
replacement module and
position it behind the flex
cable as shown. Secure the
stabilizer to the logic board
with a tie wrap.

Take Apart Bottom Cover - 10

Bottom Cover

To access the bottom cover,
remove the following:

• Top cover

• Mechanical latch

Bottom Cover

• Logic board

Caution:

Duo MiniDock contains CMOS
devices that are very
susceptible to ESD damage.
Review the ESD precautions
in Bulletins/Safety.

Note:

includes a white insulator.

The PowerBook

The bottom cover

Take Apart Link - 11

Link

Before you begin, remove
the top cover.

Link

Caution:

Duo MiniDock contains CMOS
devices that are very
susceptible to ESD damage.
Review the ESD precautions
in Bulletins/Safety.

The PowerBook

Take Apart Link - 12

±

Release Lever

Link

Mounting Clip

Warning:

the mounting clips from the
posts at the ends of the latch.
These clips secure the link,
which is under pressure,
and prevent the link from
springing up and striking
you.

1 Open (pull up) the

mechanical release
lever.

2 Remove the center of the

link from the metal
mounting brace.

3 Slide the ends of the link

from the mounting clips.

Never remove

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Service Source

Upgrades

PowerBook Duo MiniDock

Upgrades Modem Interface Card - 1

Modem Interface Card

Before you begin, remove
the following:

• Top cover

• Mechanical latch

• Logic board

Modem Interface
Card

Upgrades Modem Interface Card - 2

Note:

The modem interface
card provides telephone line
interface (DAA) circuitry
for a PowerBook Duo with an
internal modem. To address
the differences in telephone
interfaces and
specifications, Apple
provides both domestic and
international versions of the
modem interface card.

Upgrades Modem Interface Card - 3

Caution:

Duo MiniDock contains CMOS
devices that are very
susceptible to ESD damage.
Review the ESD precautions
in Bulletins/Safety.

The PowerBook

Upgrades Modem Interface Card - 4

Connect the modem

Modem Interface Card

interface card to logic board
connector J6.

J6 Connector

Logic Board

Jumper

J3 Connector

Important:

In Japan only,
install a jumper on modem
interface connector J3. A
jumper is included with
every modem interface card.

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Service Source

Exploded V ie w

PowerBook Duo MiniDock

Exploded View 1

PowerBook Duo MiniDock Exploded View

Top

Cover

815-1262

Mechanical

Latch

Assembly

922-0103

Modem
Interface
Card
922-0095 (US)
922-0094 (Int'l)

Logic
Board
661-1664

Bottom
Cover
Assembly
815-1263