Apple Macintosh Quadra Centris AWS95 Service Manual

K

Service Source

Macintosh Quadra 900/950/

AWS 95

Macintosh Quadra 900, Macintosh Quadra 950, Apple

Workgroup Server 95

K

Service Source

Basics

Macintosh Quadra 900/950/AWS

95

Basics Overview - 2

Overview

This manual includes
complete repair procedures
for the Quadra 900/950 and
the Apple Workgroup Server
95, pictured at left.

Figure: Macintosh Quadra 900/950 and AWS 95

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Service Source

Specifications

Macintosh Quadra 900/950/AWS

95

Specifications Processor - 1

Processor

CPU

Quadra 900:
Quadra 950 and AWS

95:

Addressing

Motorola 68040 microprocessor
Built-in paged memory management unit (PMMU), floating-point

unit (FPU), and 8K memory cache

25 MHz
33 MHz

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

Specifications Memory - 2

Memory

RAM

Quadra 900

Quadra 950

AWS 95

ROM

PRAM

4 MB standard, expandable to 256 MB (80 ns or faster

SIMMs)

8 MB standard, expandable to 256 MB (80 ns or faster

SIMMs)

16 MB, 32 MB, or 48 MB parity RAM standard, expandable to

256 MB (80 ns or faster 9-bit SIMMs)

1 MB, using two 150 ns, 256K by 16-bit chips

256 bytes of parameter memory

Specifications Memory - 3

VRAM

Clock/Calendar

1 MB, expandable to 2 MB (100 ns or faster VRAM SIMMs) by

installing four 256K or two 512K SIMMs

ASIC clock chip with PRAM and DFAC support and seven-year
lithium battery

Specifications Disk Storage - 4

Disk Storage

Floppy Drive

Hard Drive

Quadra 900 and 950
AWS 95

Internal, 1.4 MB Apple SuperDrive

230, 500, or 1000 MB hard drive (optional)
230, 500, 1000, or 2000 MB hard drive; comes in either a two-

drive or five-drive configuration

Note

: Refer to Take Apart for more information on the two­drive configuration and to Additional Procedures for more
information on the five-drive configuration.

Specifications Disk Storage - 5

DDS-DC Drive

2 GB digital data storage-data compression drive for 4 mm tape

backup; available as an upgrade on the Quadra 900 and 950;
optional on the AWS 95

Specifications I/O Interfaces - 6

I/O Interfaces

SCSI

Quadra 900

AWS 95 and Quadra
900/950 (with PDS
card upgrade)

Apple Desktop Bus

One external SCSI port; DB-25 connector
One internal SCSI port with 50-pin IDC connector; Supports a

maximum of eight devices (including the computer, which is
always device 7)

Two internal SCSI ports with 50-pin IDC connectors; Two

external SCSI ports with DB-25 connectors; Supports a
theoretical limit of 20 devices (including the computer, which
is always device 7) on four separate SCSI buses (two internal
and two external); Macintosh Operating System supports only
7 devices

One Apple Desktop Bus (ADB) port; low-speed, synchronous

serial interface

Specifications I/O Interfaces - 7

NuBus

Expansion

Serial

Sound

Five slots support standard and oversize cards, burst-mode

transfers, a processor write buffer, and NuBus '90; 96-pin
Euro-DIN connectors

One 68040 processor-direct slot (PDS) with 140-pin connector

Two RS-232/RS-422 ports with mini DIN-8 connectors;

230.4 Kbits/sec. maximum; 0.920 Mbits/sec. if external clock
source is provided (modem interface only)

Asynchronous, synchronous (modem only), and AppleTalk

(printer only) protocols supported

8-bit stereo output; 8-bit monoaural input
Supports electret-type microphone

Specifications I/O Interfaces - 8

Video

Ethernet

Supports Apple monitors (8-bit), VGA monitors, and NTSC and
PAL video standards

One Ethernet port, AUI-15 connector

Specifications Sound and Video - 9

Sound and Video

Video Display

Sound Generator

Microphone

Built-in 8-bit video circuitry (upgradeable to 24-bit)
Supports Apple 8-bit monitors and many non-Apple monitor

types (NTSC, PAL, VGA)

Four-voice, wavetable synthesis
Stereo sampling generator

Electret, omnidirectional; output voltage is 4 mV, peak to peak,
at normal value

Specifications Electrical - 10

Electrical

Line V oltage

Line Frequency

Maximum Power

100–240 VAC (RMS), self-configuring power supply

50–60 Hz, single phase

303 W (not including monitor)

Specifications Physical - 11

Physical

Dimensions

Weight

Height: 16.8 in. (473 mm)
Width: 8.9 in. (224 mm)
Depth: 20.6 in. (523 mm)

36 lb., 12 oz. (16.7 kg) without hard drive

Specifications Environmental - 12

Environmental

Operating Temp

Storage Temp

Relative Humidity

Altitude

50–104° F (10–40° C)

–40 to 116.6° F (–40 to 47° C)

20–80% noncondensing

0–10,000 ft. (0–3048 m)

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Service Source

Troubleshooting

Macintosh Quadra 900/950/AWS

95

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 General - 2

Error Chords

One-part error
chord sounds during
startup sequence

Two-part error chord
sounds during
startup sequence

1 Disconnect SCSI data cable from logic board and reboot

system. If startup sequence is normal, initialize hard drive.
If error chord still sounds, replace hard drive.

2 Disconnect floppy drive cable connector and reboot system. If

startup sequence is normal, replace floppy drive.

3 Replace logic board. Retain customer's SIMMs.

Perform SIMM verification. Refer to Memory manual.

Troubleshooting General - 3

System Problems

Does not power on;
screen is black, fan is
not running, and LED
is not lit

Clicking, chirping,
or thumping

1 Check power cables.
2 Plug monitor directly into wall socket and verify that

monitor has power.
3 Replace power cord.
4 Replace power supply.
5 Replace logic board. Retain customer's SIMMs.

1 Replace power supply.
2 Replace logic board. Retain customer's SIMMs.
3 Replace floppy drive cable.
4 Replace floppy drive.

Troubleshooting General - 4

System shuts down
intermittently

System Problems

1 Make sure air vents on side and rear of computer are clear.

Thermal protection circuitry may shut down system. After

30 to 40 minutes, system should be OK.
2 Replace power cord.
3 Check battery. Refer to "Battery Verification" in Additional

Procedures.
4 Replace power supply.
5 Replace logic board. Retain customer's SIMMs.

(Continued)

Troubleshooting General - 5

System
intermittently
crashes or hangs

System Problems

1 Verify that system software is correct version.
2 Verify that software is known-good.
3 Verify that software is System 7 compatible.
4 Clear parameter RAM. Hold down <Command> <Option> <P>

<R> during startup but before "Welcome To Macintosh"

appears.
5 Replace SIMMs. Refer to Memory manual.
6 Replace logic board. Retain customer's SIMMs.
7 Replace power supply.

(Continued)

Troubleshooting General - 6

Video

Screen is black, audio
and drive operate, fan
is running, and LED is
lit

1 Adjust brightness on monitor.
2 Replace monitor. Refer to appropriate monitor manual to

troubleshoot defective monitor.
3 Replace video cable.
4 If a video interface card is installed, move it to a different

slot.
5 Replace video interface card, if installed.
6 Clear parameter RAM. Hold down <Command> <Option> <P>

<R> during startup but before "Welcome To Macintosh"

appears.
7 Replace SIMMs. Refer to Memory manual.
8 Replace logic board. Retain customer's SIMMs.
9 Replace power supply.

Troubleshooting General - 7

Screen is black, audio
and drive do not
operate, but fan is
running and LED is lit

Video

1 Replace video cable.
2 If a video interface card is installed move it to a different

3 Replace video interface card, if installed.
4 Replace SIMMs. Refer to Memory manual.
5 Replace logic board. Retain customer's SIMMs.
6 Replace power supply.

(Continued)

slot.

Troubleshooting General - 8

Partial or whole
screen is bright and
audio is present, but
no video information
is visible

Video

1 Replace monitor. Refer to appropriate monitor manual to

2 Replace video cable.
3 If a video interface card is installed, move it to a different

4 Replace video interface card, if installed.
5 Clear parameter RAM. Hold down <Command> <Option> <P>

6 Replace logic board. Retain customer's SIMMs.

(Continued)

troubleshoot defective monitor.

slot.

<R> during startup but before "Welcome To Macintosh"

appears.

Troubleshooting General - 9

Floppy Drive

Internal floppy drive
does not operate

During system
startup, disk ejects;
display shows icon
with blinking "X"

1 Verify that keyswitch is not set to secure.
2 Replace disk with known-good disk.
3 Replace floppy drive cable.
4 Replace internal floppy drive.
5 Replace logic board. Retain customer's SIMMs.
6 Replace power supply.

1 Replace disk with known-good system disk.
2 Clear parameter RAM. Hold down <Command> <Option> <P>

<R> during startup but before "Welcome To Macintosh"

appears.
3 Replace floppy drive cable.
4 Replace internal floppy drive.
5 Replace logic board. Retain customer's SIMMs.

Troubleshooting General - 10

Floppy Drive

Does not eject disk 1 Verify that keyswitch is not set to secure.

2 Switch off computer. Hold mouse button down while you

switch computer on.
3 Replace internal floppy drive.
4 Replace floppy drive cable.
5 Replace logic board. Retain customer's SIMMs.

Attempts to eject
disk, but doesn't

1 Push disk completely in.
2 Reseat floppy drive bezel and drive so bezel slot aligns

correctly with drive.
3 Eject disk manually.
4 Replace floppy drive.

(Continued)

Troubleshooting General - 11

Internal floppy drive
runs continuously

MS-DOS drive does
not recognize a disk
formatted on a 1.4 MB
drive

Floppy Drive

1 Replace disk with known-good system disk.
2 Replace floppy drive cable.
3 Replace internal floppy drive.
4 Replace logic board. Retain customer's SIMMs.

To read and write files with either MS-DOS or 1.4 MB drive,
format all disks with MS-DOS drive first.

(Continued)

Troubleshooting General - 12

Hard Drive

Single internal hard
drive will not
operate; drive doesn't
spin

No internal hard
drives operate

1 Replace hard drive data cable.
2 Replace hard drive power cable.
3 Replace hard drive.

1 Verify there are no duplicate SCSI device addresses.
2 Replace hard drive data cable.
3 Replace power supply.
4 Replace logic board. Retain customer's SIMMs.

Troubleshooting General - 13

Drive does not appear
on the desktop

Works with internal
or external SCSI
devices but not with
both

Hard Drive

1 Verify there are no duplicate SCSI device addresses.
2 Update the SCSI device driver using Apple HD SC Setup. Run

Disk First Aid to verify the condition of the drive's directory

structure.
3 Replace the SCSI hard drive cable.
4 If drive is not initialized, use HD SC Setup to initialize.
5 Replace with known good hard drive. If the hard drive still

doesn't work, switch back to the original hard drive and

replace the logic board.

1 Verify there are no duplicate SCSI device addresses.
2 Replace terminator on external device.
3 Make sure internal hard drives are not terminated.
4 Refer to appropriate manual to troubleshoot defective

external device.

(Continued)

Troubleshooting General - 14

Peripheral

Cursor does not move 1 Verify that keyswitch is not set to secure.

2 Check mouse connection.
3 Inspect inside of mouse for buildup of dirt or other

contaminants. Clean mouse if necessary.
4 If mouse was connected to keyboard, connect it to a computer

ADB port instead. If mouse works, replace keyboard.
5 If mouse does not work in any ADB port on computer, replace

mouse.
6 Replace logic board. Retain customer's SIMMs.

Cursor moves, but
clicking mouse
button has no effect

1 Replace mouse.
2 Replace logic board. Retain customer's SIMMs.

Troubleshooting General - 15

Double-click doesn't
open application,
disk, or server

Peripheral

1 Remove duplicate system files from hard drive.
2 Clear parameter RAM. Hold down <Command> <Option> <P>

<R> during startup but before "Welcome To Macintosh"

appears. Reset mouse controls.
3 If mouse was connected to keyboard, connect mouse to

computer ADB port instead. If mouse works, replace

keyboard.
4 If mouse does not work in any ADB port on computer, replace

mouse.
5 Replace logic board. Retain customer's SIMMs.

(Continued)

Troubleshooting General - 16

No response to any
key on keyboard

Known-good serial
printer will not print

Known-good printer
on AppleTalk network
will not print

Peripheral

1 Verify that keyswitch is not set to secure.
2 Check keyboard connection to ADB port.
3 Replace keyboard cable.
4 Replace keyboard.
5 Replace logic board. Retain customer's SIMMs.

1 Verify that system software is 7.0.1 or later.
2 Make sure Chooser and Control Panel settings are correct.
3 Replace printer interface cable.
4 Replace logic board. Retain customer's SIMMs.

1 Verify that system software is 7.0.1 or later.
2 Make sure Chooser and Control Panel settings are correct.

(Continued)

Troubleshooting General - 17

Miscellaneous

No sound from
speaker

1 Verify that volume setting in Control Panel is 1 or above.
2 Replace speaker.
3 Replace logic board. Retain customer's SIMMs.

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Service Source

T ak e Apart

Macintosh Quadra 900/950/AWS

95

Take Apart Cover - 1

Cover

No preliminary steps are
required before you begin
this procedure.

1 Press the two latches,

lift the cover, and
remove it from the
computer.

Note

: You must place the
system on its side.
Attempting to remove the
cover with the system
standing may cause
damage to the cover.

Take Apart Drive Shelf - 2

Drive Shelf

Drive Shelf

Before you begin, remove
the cover.

Caution:

precautions in Bulletins/
Safety.

Note

Five-Drive configuration,
refer to Additional
Procedures.

Review the ESD

: For information on the

Take Apart Drive Shelf - 3

SCSI Power Cable

Floppy Drive
Cable

SCSI Data
Cable

1 Disconnect the floppy

drive cable and SCSI
data cable from the logic
board.

Note

: The SCSI data cable
is connected to the PDS
card in the Apple
Workgroup Server 95.

2 Disconnect the SCSI

power cable from the
power supply.

Take Apart Drive Shelf - 4

3 Remove the two drive

Drive Shelf
Screws

shelf screws.

4 Slide the drive shelf

toward the rear of the
computer.

Take Apart Drive Shelf - 5

5 Grasp the cable tie and

Cable Tie

the metal tab and lift the
drive shelf out of the
computer, being careful
that none of the cables
catch on the case.

Metal
Tab

Take Apart Floppy Drive - 6

Floppy Drive

Floppy Drive

Before you begin, remove
the following:

• Cover

• Drive shelf

Take Apart Floppy Drive - 7

1 Disconnect the floppy

drive cable from the

Screw

Floppy Drive
Cable

floppy drive.

2 Remove the floppy drive

mounting screw and
spacer.

Spacer

Take Apart Floppy Drive - 8

3 Lift the rear of the

floppy drive and slide it
off the drive shelf.

Replacement Note

recommends using dust
shields on 1.4 MB
SuperDrives in Quadra 900
computers. All 1.4 MB
replacement drives ship
with the dust shield already
installed. If you plan to
install a dust shield on the
current drive, you must
first clean the drive.

: Apple

Take Apart Hard Drive - 9

Hard Drive

Hard Drive

Before you begin, remove
the following:

• Cover

• Drive shelf

• Floppy drive

Take Apart Hard Drive - 10

Drive Carrier

Carrier
Mounting Screw

SCSI
Data Cable

SCSI Power
Cable

1 Disconnect the SCSI data

cable and power cable
from the hard drive.

2 Remove the hard drive

mounting screw.

3 Lift the hard drive, along

with its carrier, from
the drive shelf.

Replacement Note:

For
information on removing the
hard drive from the carrier
and returning drives,
cables, and carriers to
Apple, refer to the Parts
chapter in this manual.

Take Apart DDS-DC Tape Drive - 11

DDS-DC Tape Drive

DDS-DC Tape
Drive

Before you begin, remove
the following:

• Cover

• Drive shelf

• Floppy drive

Take Apart DDS-DC Tape Drive - 12

Drive Carrier

Carrier Mounting Screw

SCSI Data Cable

Power
Cable

1 Disconnect the SCSI data

cable and power cable
from the tape drive.

2 Remove the carrier

mounting screw.

Take Apart DDS-DC Tape Drive - 13

Drive Carrier

Carrier Mounting Screw

SCSI Data Cable

Power
Cable

3 Lift the tape drive,

along with its carrier,
from the drive shelf.

Replacement Note:

For
information on removing the
tape drive from the carrier
and returning drives,
cables, and carriers to
Apple, refer to the Parts
chapter in this manual.

Take Apart Speaker Bezel and Speaker - 14

Speaker

Speaker Bezel and Speaker

Before you begin, remove
the following:

• Cover

• Drive shelf

Take Apart Speaker Bezel and Speaker - 15

1 Disconnect the speaker

Speaker Cable Speaker Bezel

cable from the logic
board.

2 Release the four plastic

latches on the inside of
the speaker bezel.

3 Remove the speaker

bezel and speaker from
the computer.

Power
Supply

Take Apart Speaker Bezel and Speaker - 16

4 Remove the two screws

and lift the speaker off
the speaker bezel.

Take Apart Power Supply - 17

Power Supply

Power Supply

Before you begin, remove
the following:

• Cover

• Drive shelf

• Speaker bezel

Take Apart Power Supply - 18

1 Disconnect the power

supply cable from the

Power Supply Cable

logic board.

2 Remove the three power

supply mounting screws.

Power Supply

Take Apart Power Supply - 19

Bezel

3 Release the two plastic

latches on the inside of
the blank bezel and
remove the bezel.

Latch

Latch

Take Apart Power Supply - 20

4 Grasp the two handles

Handles

and, pulling evenly, lift
the power supply
straight up out of the
computer.

Take Apart Fan - 21

Fan

Fan

Before you begin, remove
the following:

• Cover

• Drive shelf

• Speaker bezel

• Power supply

Take Apart Fan - 22

Fan Cable

Fan

1 Disconnect the fan cable

from the power supply.

2 Remove the four fan

mounting screws.

3 Remove the fan and fan

grill from the power
supply.

Power Supply

Fan Grill

Take Apart Workgroup Server PDS Card - 23

Workgroup Server PDS Card

Workgroup Server
PDS Card

Before you begin, remove
the cover

Caution:

the computer prior to
removing or installing the
Workgroup Server 95 PDS
card. Failure to unplug the
computer could cause damage
to the logic board and/or
card.

You must unplug

Take Apart Workgroup Server PDS Card - 24

1 Disconnect the SCSI data

cable from the
Workgroup Server PDS
card.

SCSI Data
Cable

Take Apart Workgroup Server PDS Card - 25

2

Caution

on both sides of the card
to avoid bending the
connector pins and
remove the card.

Note

the card by the metal
bracket.

: Pull up evenly

: Grasp the rear of

Replacement Caution:

replacing the card, do not
force it into the expansion
slot. If the card does not seat
properly, remove it and try
again.

When

Take Apart Logic Board - 26

Logic Board

Before you begin, remove
the following:

• Cover

• Drive shelf

• Speaker bezel

• Power supply

• Expansion cards

Note

: The Quadra 900
contains a 25 MHz logic
board; the Quadra 950 and
AWS 95 contain a 33 MHz
board. Be sure to install the

Logic Board

correct board.

Take Apart Logic Board - 27

Reset
Switch

Interrupt
Switch

Caution:

You must unplug
the computer prior to
removing expansion cards.
Failure to unplug the
computer could cause damage
to the logic board and/or
cards.

1 Press in on the sides of

the interrupt and reset
switches and push them
out of the case.

Take Apart Logic Board - 28

2 Disconnect the

keyswitch cable from the
logic board.

3 Press down on the latch

and slide the logic board
toward the front of the
computer.

Latch

4 Lift the logic board,

front first, from the
computer.

Logic Board

Keyswitch
Cable

Replacement Note:

Remove
the SIMMs from the
defective logic board and
install them on the
replacement logic board.
(See the Memory manual.)

K

Service Source

Upgrades

Macintosh Quadra 900/950/AWS

95

Upgrades Expansion Cards - 1

Expansion Cards

Expansion Card

Before you begin, remove
the cover.

Caution:

the computer prior to
removing or installing
expansion cards. Failure to
unplug the computer could
cause damage to the logic
board and/or cards.

You must unplug

Upgrades Expansion Cards - 2

1

Caution:

on both sides of the card
to avoid bending the
connector pins and
remove the card.

Note:

the card by the metal
bracket.

Pull up evenly

Grasp the rear of

Replacement Caution:

When replacing the card,
do not force it into the
expansion slot. If the
card does not seat
properly, remove it and
try again.

Upgrades CD-ROM Upgrade - 3

CD-ROM
Drive

CD-ROM Upgrade

Before you begin, remove
the following:

• Cover

• Drive shelf

• Floppy drive

• Speaker bezel

Note:

Before installing the
CD-ROM drive, be sure to
remove any SCSI device
installed beneath the floppy
drive.

Upgrades CD-ROM Upgrade - 4

1 Remove the blank bezel.

2 Install the slotted CD-

ROM drive bezel.

3 Reinstall the speaker

bezel.

Bezel

Latch

Latch

Upgrades CD-ROM Upgrade - 5

4 Connect the audio and

Audio Cable

CD-ROM drive power
cables to the CD-ROM
drive.

Power Cable

Upgrades CD-ROM Upgrade - 6

5 Install the CD-ROM

drive on the drive shelf
in the front position.

Floppy

Drive

Note

: Set the SCSI ID
number on the CD-ROM
drive. Make sure the ID

SCSI ID Select
Switch

CD-ROM
Drive

number is unique from
any other internal SCSI
device. Apple
recommends SCSI ID
number 5.

6 Reinstall the floppy

drive on the CD-ROM
drive carrier.

Drive
Shelf

7 Reinstall the drive shelf

and drives into the
computer.

Upgrades CD-ROM Upgrade - 7

8 Remove the jumper at

connector J16 and
connect the audio cable to

Audio Cable

the logic board at that
location.

9 Reconnect the SCSI data

cable to all SCSI devices

10 Reconnect the SCSI

power cables to the
power supply.

Upgrades Quadra 950 Upgrade - 8

Quadra 950 Upgrade

Before you begin, remove
the following:

• Cover

• Drive shelf

• Speaker bezel

• Power supply

• Expansion cards

• Logic board

Upgrades Quadra 950 Upgrade - 9

Note:

A Macintosh Quadra
950 upgrade kit upgrades a
Macintosh Quadra 900 to a
Macintosh Quadra 950. The
upgrade kit includes a
Macintosh Quadra 950 logic
board and product labels.

Note

: After you perform a
Quadra 950 upgrade, the
system information
displayed by About This
Macintosh under the Apple
menu will still indicate a
Macintosh Quadra 900. You
must reinstall system
software to display the
correct system information.

Upgrades Quadra 950 Upgrade - 10

1 Install the Macintosh

Quadra 950 logic board.

2 Replace all modules.

Logic Board

Upgrades Quadra 950 Upgrade - 11

3 Peel off the backing from

the product label and
place the label on the
speaker bezel.

Label
Placement

Speaker
Bezel

Upgrades Quadra 950 Upgrade - 12

4 Peel off the backing from

the product label and
place the label on the
rear bezel.

Label
Placement

Upgrades AWS 95 Upgrade - 13

AWS 95 Upgrade

Workgroup
Server 95
PDS Card

Before you begin, remove
the cover.

Note

: A Workgroup Server
95 upgrade kit upgrades a
Macintosh Quadra 900 or
950 to a Workgroup Server

95. The upgrade kit
includes a processor-direct
slot (PDS) card and A/UX

3.0.1 and Retrospect
backup software on CD­ROM.

Caution:

the computer prior to

You must unplug

Upgrades AWS 95 Upgrade - 14

installing or removing the
Workgroup Server 95 PDS
card. Failure to unplug the
computer could cause damage
to the logic board and/or
card.

1 Remove the plastic cover

plate behind the
processor-direct slot.

Plastic
Cover
Plate

Upgrades AWS 95 Upgrade - 15

2 Disconnect the SCSI data

cable from the logic
board.

SCSI Data Cable

Upgrades AWS 95 Upgrade - 16

3 Install the Workgroup

Workgroup Server 95
PDS Card

Server 95 PDS card in
the PDS slot.

PDS Slot

Replacement Caution

:
When installing the
card, do not force it into
the PDS slot. If the card
does not seat properly,
remove it and try again.

Upgrades AWS 95 Upgrade - 17

4 Connect the SCSI data

cable to the 50-pin
connector at the top of
the Workgroup Server

SCSI Data
Cable

95 PDS card.

5 Install the A/UX 3.01

and Retrospect software.

Upgrades AWS Cache Upgrade - 18

AWS Cache

Workgroup
Server 95
PDS Card

Upgrade

Before you begin, remove
the following:

• Cover

• WGS 95 PDS card

Note:

A Workgroup Server
PDS card cache upgrade
increases the amount of RAM
cache from 128K to 256K
or 512K.

Upgrades AWS Cache Upgrade - 19

Workgroup
Server 95
PDS Card

Caution:

You must unplug
the computer prior to
removing or installing the
Workgroup Server 95 PDS
card. Failure to unplug the
computer could cause damage
to the logic board and/or
card.

Upgrades AWS Cache Upgrade - 20

Install SIMMs as indicated.

• Upgrade from 128K to

256K:
– One 128K SRAM SIMM
– One TAG SIMM

• Upgrade from 128K to

TAG SIMM

128K SRAM SIMM

256K SRAM SIMM

512K:
– One 128K SRAM SIMM
– One 256K SRAM SIMM
– One TAG SIMM

Upgrades Tape Drive Upgrade - 21

DDS-DC
Tape Drive

Tape Drive Upgrade

Before you begin, remove
the following:

• Cover

• Drive shelf

• Floppy drive

• Speaker bezel

Upgrades Tape Drive Upgrade - 22

Note

: A DDS-DC drive

DDS-DC
Tape Drive

upgrade kit adds a digital
data storage–data
compression drive to a
Workgroup Server 95 or to
a Quadra 900 or Quadra 950
with the Workgroup Server
PDS card.

Note:

Before installing the
DDS-DC drive, be sure to
remove any SCSI device
installed beneath the floppy
drive.

Upgrades Tape Drive Upgrade - 23

1 Install the DDS-DC tape

drive on the drive shelf
in the front position.

Note

: Set the SCSI ID

DDS-DC
Tape Drive

SCSI ID Switch

number on the DDS-DC
drive. Make sure the ID
number is unique from
any other internal SCSI
device. Apple
recommends SCSI ID
number 5.

Drive
Shelf

Upgrades Tape Drive Upgrade - 24

2 Attach the floppy drive

on the carrier for the
DDS-DC tape drive.

Floppy
Drive

DDS-DC
Drive

Drive
Shelf

3 Reinstall the drive shelf

and drives into the
computer.

Upgrades Tape Drive Upgrade - 25

4 Squeeze the two plastic

latches on the inside of
the blank bezel.

5 Remove the blank bezel

from the front of the

Blank Bezel

computer.

Latch

Latch

6 Install the DDS-DC drive

bezel.

7 Replace the speaker

bezel and cover.

Upgrades Five-Drive Upgrade - 26

Five-Drive
Carrier

Hard Drive
Power
Cables

SCSI ID
Switch

SCSI Cable

Five-Drive Upgrade

Before you begin, remove
the existing drive shelf.

Upgrades Five-Drive Upgrade - 27

Five-Drive
Carrier

Hard Drive
Power
Cables

SCSI ID
Switch

SCSI Cable

You will need the following
to ready the AWS 95 to hold
five drives:

• Five-drive carrier kit

• Five SCSI ID select

switches (part number
depends on drive type)

• Five-drive SCSI cable

with terminator

• Two hard drive power

cables with two drive
connectors each (each
cable connects up to two
hard drives)

• One hard drive power

cable with one drive
connector (already in
existing unit)

Upgrades Five-Drive Upgrade - 28

1 Remove the two screws

that secure the top of the
new drive carrier to the
bottom piece.

2 Remove the top piece of

the drive carrier.

Upgrades Five-Drive Upgrade - 29

There are five openings in
the bottom panel of the drive

SCSI ID
Switch

carrier for the SCSI ID
switches. The openings are
labeled A-E.

Note

: The type of SCSI ID
switch you install will
depend on the drive type.

3 To install the SCSI ID

switch for the first
drive, feed the
connector end of the SCSI
ID cable through the
opening labeled A on the
drive carrier.

EB DAC

Upgrades Five-Drive Upgrade - 30

4 Push in on the SCSI ID

switch until it clicks

SCSI ID
Switch

into place.

5 Repeat this procedure to

install the remaining
SCSI ID switches.

EB DAC

Upgrades Five-Drive Upgrade - 31

6 Connect the free end of

the first SCSI ID switch
cable to the first hard
drive, which you will be

E

D

C

B

A

installing in drive slot A.

Note

: When setting the
SCSI ID switches, make
sure no two peripherals,
including the DAT
player, are using the
same SCSI ID. Also, do
not set any of the SCSI ID
switches to 7.

Hard drives must be
installed in the five­drive carrier in the
order shown (A–E).

Upgrades Five-Drive Upgrade - 32

Note:

If you install
fewer than five drives,
you must still install the
drives in the order

E

D

C

B

A

shown.

Upgrades Five-Drive Upgrade - 33

7 Remove the hard drives’

terminating resistors
before installation.

8 Install the first hard

drive in slot A (the
lower right slot) of the
drive carrier.

9 Insert the four screws

that secure the hard
drive to the drive
carrier. Tighten the
screws.

Follow this procedure to
install up to four additional
hard drives in the order
shown on the previous page.

Upgrades Five-Drive Upgrade - 34

10 Once you have installed

all the hard drives,
replace the top of the
drive carrier.

11 Replace the two screws

that secure the top of the
drive carrier to the
bottom of the drive
carrier.

Caution

to pinch the cables that
run from the SCSI ID
select switches.

: Be careful not

Upgrades Five-Drive Upgrade - 35

Drive B

Tape
Drive

Terminator

Drive D

Drive E

Not Used

Drive A

Drive C

PDS Connector

The SCSI cable connects up
to five hard drives and one
tape drive. The illustration
on this page indicates which
connectors attach to which
peripherals. The pull tabs
on the cable are marked as
illustrated.

Note

: Connect the tape drive

first. (See next page.)

Note

: If fewer than six
peripherals are present,
leave the connectors for the
missing peripherals
disconnected.

Upgrades Five-Drive Upgrade - 36

Tape Drive
Connector

12 Attach the end of the SCSI

cable to the connector on
the tape drive (if
present).

13 Pull through the cable

that connects the floppy
drive (if present) to the
logic board so that the
cable will not obstruct
the insertion of the drive
carrier.