K
Service Source
Power Macintosh 4400
Power Macintosh 4400/200 and 4400/200 PC
Far East: Power Macintosh 7220/200 and 7220/200 PC
Europe Only: Power Macintosh 4400/160
K
Service Source
Basics
Power Macintosh 4400
Basics System Overview - 1
System Overview
The Power Macintosh 4400 is an entry-level computer with
a PowerPC 603e processor. The adapter card in the
4400/160 allows installing three PCI cards. In later
models the adapter card allows installing one
communications card and two PCI cards.
The computer can be turned on or off from the keyboard and
from the power button. A voltage switch allows manual
selection of two settings for voltage ranges of
100–130V or 200–230V.
Basics Power Macintosh 4400/200, 7220/200 - 2
Power Macintosh 4400/200, 7220/200
The Power Macintosh 4400/200 will be sold worldwide. In
the Far East, it will be named 7220/200. These computers
have the same features as the Power Macintosh 4400/160,
with these exceptions:
• Communications slot II on the PCI adapter card
• Two PCI card slots on the PCI adapter card
• 200 MHz processor clock
• Maximum memory expansion of 160 MB
Basics Voltage Switch - 3
Voltage Switch
Voltage Switch
The voltage switch must be
set correctly to avoid
damaging the computer.
Insert a screw driver in the
slot to set the switch to show
“115” for voltages between
100 and 130. Set the switch
to show “230” for voltages
between 200 and 230. Some
countries use two
standardized voltages. If you
aren’t sure which voltage is
available, check with the
electricity supply company
before plugging in the
computer.
Basics Voltage Switch - 4
Here is a table listing voltages for some countries:
Country Voltage
Japan 100
South Korea 100 or 220
Jamaica, Taiwan 110
Peru 110 or 220
Brazil, Lebanon 110–220
Philippines 115
Bermuda, Canada, Puerto Rico, United States, Venezuela 120
Mexico 127
Saudi Arabia 127 or 220
Hong Kong 200
Basics Voltage Switch - 5
Country Voltage
India, South Africa 220-250
Israel, Pakistan, Singapore 230
Australia, Kuwait, Malta, New Zealand, Northern Ireland,
Papua New Guinea, Oman, Qatar, United Kingdom
Austria, Belgium, Denmark, Finland, France, Germany,
Greece, Italy, Luxembourg, Netherlands, Norway, Portugal,
Spain, Sweden, Switzerland
Bahrain, Chile, China (People’s Republic), Czechoslovakia,
Egypt, Greenland, Hungary, Iceland, Indonesia, Iran,
Jordan, Liechtenstein, Nepal, Paraguay, Poland, Romania,
United Arab Emirates, Russia and the Commonwealth of
Independent States (CIS), Yemen, Yugoslavia
240
220-230
220
Basics Voltage Switch - 6
Caution:
not set the voltage for the monitor. To protect the monitor,
be sure to use the appropriate adapter or voltage converter,
if one is necessary.
Setting the correct voltage for the computer does
Basics Key Commands - 7
Key Commands
Since there are no programmer’s switches on the Power
Macintosh 4400, the reset and interrupt functions require
pressing key combinations. There are two power buttons on
the 4400, one on the keyboard and one on the front of the
computer (see the Front View diagram later in this
chapter). The keyboard power key is identified by a triangle
imprinted on it.
Press these key combinations for at least one second while
holding down the power key found on the keyboard:
Function Key(s)
Interrupt Command
Reset Control-Command
Basics CD-ROM and Hard Drive Interface - 8
CD-ROM and Hard Drive Interface
The internal hard drive uses intelligent device electronics
(IDE) technology, commonly used in DOS-compatible
systems. The IDE drive uses the standard advanced
technology attachment (ATA) or IDE interface. The IDE hard
drive functions the same as a typical SCSI hard drive. You
must replace IDE drives like for like. The IDE drive does not
affect SCSI ID selections or SCSI termination schemes. Seven
external SCSI devices may be daisy-chained through the
external SCSI port.
The CD-ROM drive uses the advanced technology adapter
peripheral interface (ATAPI), not SCSI. The ATA and ATAPI
interface schemes could be incompatible with some disk
utility programs.
Basics Peripheral Component Interconnect (PCI) Technology - 9
Peripheral Component Interconnect
(PCI) Technology
The Power Macintosh 4400 offers peripheral component
interconnect (PCI) expansion. Because the PCI bus is an
industry standard, most existing PCI 2.0-compliant cards
(with the addition of a Macintosh OS-specific software
driver) will work in these computers.
PCI offers significantly higher performance than the NuBus
architecture used in previous Macintosh models. Running at
33 MHz, the PCI bus is up to three times faster than NuBus,
offering overall enhanced system performance, particularly
in the areas of video and networking.
PCI expansion cards are mounted horizontally in an adapter
card.
Basics Peripheral Component Interconnect (PCI) Technology - 10
Note:
The Power Macintosh PCI adapter card expansion slots
are compatible with all PCI 2.0 specification-compliant
cards with the addition of a Macintosh-OS-specific software
driver. Nubus cards
PDS cards for the Macintosh LC family, the Macintosh
Quadra 630 computer, or cards that operate in the I/O
expansion slot in Power Macintosh 5200 and 6200
computers are
expansion slots.
cannot
not
compatible with the PCI adapter card
be used in these expansion slots.
Basics Dual In-Line Memory Modules (DIMMs) - 11
Dual In-Line Memory Modules (DIMMs)
The Power Macintosh 4400 uses DRAM on dual in-line
memory modules (DIMMs). Three slots allow for memory
expansion up to 96 MB using 3.3 V unbuffered 8-byte
extended data output (EDO) JEDEC-standard 168-pin DRAM
DIMM cards. DRAM expansion slot 1 only supports singlebank DIMMs. DRAM expansion slots 2 and 3 support both
single-bank and dual-bank DIMMs. No DRAM is soldered on
the logic board.
Important:
used in previous Macintosh models are
4400 models.
rate. Use 168-pin, 3.3 V unbuffered EDO, 60 ns or faster
DIMMs. Also, the JEDEC MO-161 specification shows three
possible heights for the EDO DIMM. For Macintosh
The single in-line memory modules (SIMMs)
not
compatible with
Don’t
use DIMMs that support a 4K refresh
Basics Dual In-Line Memory Modules (DIMMs) - 12
computers, use only the shortest of the three (1.100
inches). Taller DIMMs put excessive pressure on the DIMM
sockets due to mechanical pressure inside the case.
The DIMMs can be installed one or more at a time. In the
4400/160 each DIMM slot can support up to a 32 MB bank
of memory. In the 4400/200 and 7220/200, the first
DIMM slot supports up to a 32 MB bank and the other two
support up to 64 MB in each. The logic board supports only
linear memory organization. The combined memory of all of
the DIMMs installed will be configured as a contiguous
memory space.
Basics Video RAM - 13
Video RAM
The logic board has a 120-pin video DIMM connector that
allows the use of EDO RAM. The video controller supports the
following for video memory:
• 1 or 2 MB of EDO RAM
• 1, 2, or 4 MB of SGRAM
PC Compatibility Cards
Apple computer offers PC Compatibility Card upgrade kits
that bring full DOS functionality to the Power Macintosh
4400 computers. The cards plug into any available PCI slot
on the logic board. Refer to the PC Compatibility Card
manual on this Service Source CD for more information and
installation instructions.
Basics GeoPort Technology - 14
GeoPort Technology
Geoport is a hardware and software communications
architecture that has been optimized for computertelephony integration. It has three main attributes:
• It lets any GeoPort-compatible computer connect to any
telephone (analog or digital, public or private)
anywhere in the world.
• Once connected, it supports an arbitrary number of
independent data streams up to a total bandwidth of
2 MB/second.
• Unlike traditional asynchronous data communications
(such as AppleTalk), GeoPort also supports isochronous
data streams (such as real-time voice and video) and
provides the real-time application program interfaces
(APIs) necessary to hide the implementation details
from both the recipient and the sender.
Basics Front View - 15
Front View
Monitor
Computer
Floppy Drive
CD-ROM Drive
Speaker
Keyboard
Hard Drive
Power Button
CD-ROM Drive
Open/Close Button
Power
Key
Mouse
Basics Rear View - 16
Rear View
SCSI Port
Voltage Selector
Power Socket
Apple Desktop Bus
(ADB) Port
Printer Port
External Modem Port
Expansion Slots (3)
Access Covers
Monitor Port
Sound Output Port
Sound Input Port
Basics Logic Board - 17
Logic Board
Video DIMM Slot
Processor with
Heat Sink
L2 Cache
Slot
ROM
Battery
PCI Adapter
Slot
Power Supply
Sockets
3 DRAM Slots
K
Service Source
Specifications
Power Macintosh 4400
Specifications Processor - 1
Processor
CPU
PM 4400/160
PM 4400/200, PM 7220/200
PM 4400/200 PC, PM 7220/200 PC
PowerPC 603e processor
160 MHz
Built-in floating point unit (FPU)
PowerPC 603e processor
200 MHz
Built-in floating point unit (FPU)
PowerPC 603e processor
200 MHz
Built-in floating point unit (FPU)
166 performance-rated 6x86 processor
Specifications Processor - 2
Processor Bus
64-bit ROM data bus width
40 MHz system bus
Specifications Memory - 3
Memory
DRAM
4400/160
4400/200, 7220/200
16 MB DRAM (no RAM soldered on board)
Expandable to 96 MB in three slots using dual in-line memory
modules (DIMMs) that are 64-bit wide, 168-pin unbuffered
3.3 V EDO, with 60 ns RAM access time or faster.
32 MB DRAM
Expandable to 160 MB in three slots using dual in-line memory
modules (DIMMs) that are 64-bit wide, 168-pin unbuffered
3.3 V EDO, with 60 ns RAM access time or faster, 1K or 2K
refresh rate.
Specifications Memory - 4
Video RAM
ROM
PRAM
Cache Memory
4400/160
4400/200, 7220/200
1 MB video EDO RAM DIMM
Expandable to 4 MB with SGRAM DIMM
EDO DIMM 1 or 2 MB
SGRAM DIMM 1, 2, or 4 MB
4 MB of read-only memory
8K of nonvolatile parameter memory
Optional 256K Level 2 cache on a 160-pin DIMM card
Optional 256K Level 2 cache DIMM
Specifications Disk Storage - 5
Disk Storage
Floppy Drive
CD-ROM Drive
Hard Drive
4400/160
4400/200, 7220/200
1.4 MB Apple SuperDrive
Accepts high-density 1.4 MB disks and 800K disks
Reads, writes, and formats Macintosh, Windows, MS-DOS,
OS/2, and ProDOS disks
Advanced Technology Adapter Peripheral Interface (ATAPI)
CD-ROM (8X-speed)
1.2 GB IDE hard drive
2 GB IDE hard drive
Specifications I/O Interfaces - 6
I/O Interfaces
Apple Desktop Bus
Keyboard
Mouse
DMA I/O
Communications
Expansion Slot
(4400/200, 7220/200)
One Apple Desktop Bus (ADB) port supporting up to three ADB
input devices daisy-chained through a synchronous serial bus
Supports all Apple Desktop Bus (ADB) keyboards
Supports all models of the ADB mouse
10 DMA channels
An Ethernet card or internal modem card may be installed in the
bottom communications slot of the adapter card.
Specifications I/O Interfaces - 7
PCI Expansion
4400/160
4400/200, 7220/200
Three industry-standard PCI expansion slots (45 watts combined
power allowance for all three slots). Install only expansion
cards that come with Macintosh drivers and are compliant with
the PCI 2.0 standard. NuBus cards cannot be used in these
expansion slots.
One internal expansion slot supports a full-size 12.28-inch
15-watt peripheral component interconnect expansion card.
All three internal expansion slots support 6.88-inch PCI
expansion cards.
Two industry-standard PCI expansion slots. Install only expansion
cards that come with Macintosh drivers and are compliant with
the PCI 2.0 standard. NuBus cards cannot be used in these
expansion slots. One internal PCI expansion slot supports a
12.28-inch, 15-watt PCI card. Both internal PCI expansion
slots support 6.88-inch PCI cards.
Specifications I/O Interfaces - 8
Video-out
Monitor port (15-pin SVGA compatible) supporting color and
grayscale monitors of various sizes and resolutions. Depending
on the amount of video RAM installed, the built-in video
supports up to 800 x 600 pixel resolution at 16 bits per pixel
and up to 1152 x 870 at 8 bits per pixel. Built-in 2D graphics
acceleration.
Can connect to these monitors: Apple High Resolution RGB Monitor
(13"), Macintosh Color Display (14"), Apple Basic Color
Monitor (14"), Apple Color Plus 14" Display, Apple Multiple
Scan 14 or Apple Multiple Scan 15 Displays, Apple 16"
Display, Apple Multiple Scan 17 Display or Apple Multiple
Scan 1705 Display, AppleVision 1710 Display, Apple 19" RGB
Display, Apple Multiple Scan 20 Display, Apple 21" Color
(two-page display).
Specifications I/O Interfaces - 9
Sound
Sound Output
Sound Input
16-bit stereo audio input and output—stereo in, stereo record,
stereo out. Up to 44.1 KHz sampling rate.
One 3.5-mm sound output port for line-level devices such as
powered loudspeakers.
One 3.5-mm sound input port for stereo sound input. The sound
input port supports the Apple PlainTalk Microphone. In
addition, the sound input port supports a standard stereo
(miniplug-to-RCA) cable adapter for connecting stereo
equipment to the computer. The port does not support the Apple
Omni microphone (the round microphone shipped with some
earlier models of Macintosh) or the attenuated RCA adapter
provided with some models of Macintosh.
Specifications I/O Interfaces - 10
SCSI
Serial
GeoPort Telephony
One external standard SCSI port that supports up to seven external
SCSI devices
Important:
manufactured by Apple may require updated drivers. Contact
the device manufacturer for information on obtaining driver
software.
Two high-speed DMA RS-232/RS-422 serial ports. LocalTalk
and GeoPort compatible.
Requires GeoPort telecom adapter
28.8 Kbit/sec. modem support
V.17 fax support
GeoPort Fax and GeoPort Telephony software included
Speakerphone and answering-machine capability
Some older SCSI devices or SCSI devices not
Specifications Electrical - 11
Electrical
Line V oltage
Frequency
Power
Energy Star
90–270 VAC
Switchable 110/220 VAC, RMS single phase
47–63 Hz
Single phase
200 W maximum, not including display
EPA Energy Star compliant
Specifications Physical - 12
Physical
Dimensions
Weight
Height: 5.43" (139 mm)
Width: 15.12" (385 mm)
Depth: 17.37" (442 mm)
24 lb. (9.5 kg)
Weight varies depending on type of hard disk and any optional
equipment.
Specifications Environmental - 13
Environmental
Temperature
Humidity
Altitude
Operating: 50°–104° F (10°–40° C)
Storage: -40° to 116.6° F (-40° to 47° C)
Transient: -40° to 149° F (-40° to 65° C)
Noncondensing, 20–95%
0–10,000 ft. (0–3,048 m)
K
Service Source
Troubleshooting
Power Macintosh 4400
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/System - 2
Symptom Charts
System
System
intermittently
crashes or hangs
1 Verify that system software is version 7.5.3 or later.
2 Verify that software is known-good.
3 Verify that software is PowerPC-compatible (contact
developer).
4 Clear parameter RAM. Hold down Command-Option-P-R
during startup, but before “Welcome to Macintosh” appears.
5 Disconnect all external devices attached (except monitor)
and restart.
6 Replace DIMMs.
7 Replace logic board. Retain customer’s DIMMs.
8 Replace power supply.
Troubleshooting Symptom Charts/System - 3
System
System does not start
up
System does not start
up from keyboard,
but starts up from
power switch
System does not start
up from power
switch, but starts up
from keyboard
1 Reset logic board. Refer to Additional Procedures.
2 Replace power supply.
3 Replace logic board. Retain customer’s DIMMs.
1 Check keyboard connection.
2 Verify keyboard as known-good.
1 Make sure power switch cable is properly plugged into logic
board.
2 Check for cuts in power switch cable (especially near front
under CD-ROM drive).
Troubleshooting Symptom Charts/System - 4
System
Front power switch
LED does not light up
1 Check LED connection to logic board.
2 Check polarity of LED connector on logic board. Triangle
should be over pin 1.
3 Check cable for cuts (especially under CD-ROM drive).
4 Replace LED harness.
Troubleshooting Symptom Charts/Audio - 5
Audio
Distorted or garbled
sound
No sound output from
speaker
1 Check volume level.
2 Check volume level in Monitor and Sound control panel.
3 Check speaker for damage.
1 Check speaker connection to logic board.
2 Attach headphones. If you hear sound through headphones,
replace speaker assembly.
3 Replace speaker assembly.
Troubleshooting Symptom Charts/Video - 6
Video
No video, fan is
running
After restarting, two
connected monitors,
used for video
mirroring, appear
black or gray
1 Check monitor connection.
2 Try known-good monitor.
3 Remove all DRAM DIMMs and try replacing them one at a
time to test. Replace any bad DIMMs.
4 Replace logic board. Retain customer’s DIMMs.
5 Replace power supply.
Note:
This issue only affects early European Power Macintosh
4400 systems.
Unplug monitor cable connected to PCI video card and restart.
Or, if user wants to continue video mirroring, instruct to turn off
video mirroring in Monitors & Sounds control panel before
shutting down or restarting. Turn video mirroring on after
starting computer.
Troubleshooting Symptom Charts/Floppy Drive - 7
Floppy Drive
Audio and video are
present, but internal
floppy drive does not
operate
Disk ejects; display
shows icon with
blinking “X”
Disk does not insert
all the way
1 Replace bad disk with known-good disk.
2 Make sure cable is connected to logic board.
3 Replace floppy drive.
4 Replace cable connecting to the logic board.
5 Replace logic board. Retain customer’s DIMMs.
1 Replace bad system disk with known-good system disk.
2 Replace floppy drive.
3 Replace logic board. Retain customer’s DIMMs.
1 Eject previously inserted disk by inserting opened paper
clip into hole beside floppy drive.
2 Switch off system and hold mouse button down while
switching system on (to complete eject cycle).
3 Replace floppy drive.
Troubleshooting Symptom Charts/Floppy Drive - 8
Floppy Drive
Disk does not eject 1 Insert opened paper clip into hole beside floppy drive.
2 Switch off system and hold mouse button down while
switching system on (to complete eject cycle).
3 Replace floppy drive.
Internal floppy drive
runs continuously
1 Replace bad disk with known-good disk.
2 Replace floppy drive.
3 Replace logic board. Retain customer’s DIMMs.
Troubleshooting Symptom Charts/Hard Drive - 9
Hard Drive
Internal or external
hard drive does not
spin up
Internal hard drive
runs continuously
Hard drive not found
when booted from CDROM drive
1 Verify that all hard drive connections are secure.
2 Reseat logic board.
3 Replace internal IDE hard drive.
4 Replace logic board. Retain customer’s DIMMs.
1 Verify that system software is version 7.5.3 or later.
2 Replace hard drive cable.
3 Replace internal hard drive.
4 Replace logic board. Retain customer’s DIMMs.
Use Drive Setup to attempt to recognize or mount hard drive.
Troubleshooting Symptom Charts/Hard Drive - 10
Hard Drive
Hard drive not
recognized
1 Make sure CD-ROM interface cable is connected.
Note:
This IDE bus termination issue only affects early
European Power Macintosh 4400 systems.
2 Make sure hard drive cables are securely connected.
Troubleshooting Symptom Charts/CD-ROM Drive - 11
CD-ROM Drive
CD-ROM drive does
not accept disc
Volume control does
not operate correctly
when playing audio
CD, but does work
when playing system
sounds
Computer cannot
mount known-good
CD-ROM discs
1 If compact disc is dirty or damaged, use known-good compact
disc.
2 Replace CD-ROM drive.
Check Monitor and Sound control panel setting.
1 Check that CD-ROM drive software is installed correctly.
2 Check power and signal cable connections.
3 Replace CD-ROM drive.
Troubleshooting Symptom Charts/Peripheral - 12
Peripheral
Cursor does not move 1 Restart system.
2 Check mouse connection.
3 If mouse was connected to keyboard, connect mouse to rear
ADB port and disconnect keyboard. If mouse works, replace
keyboard.
4 If mouse does not work in ADB port, replace mouse.
5 Reseat logic board.
6 Replace logic board. Retain customer’s DIMMs.
Cursor moves, but
when you click the
mouse, nothing
happens
1 Replace mouse.
2 Reseat logic board.
3 Replace logic board. Retain customer’s DIMMs.
Troubleshooting Symptom Charts/Peripheral - 13
Peripheral
Cannot double-click
mouse to open
application, disk, or
server
No response to any
key on keyboard
1 Check mouse speed on Mouse control panel.
2 Unplug battery from logic board, wait 20 seconds, plug in
battery, and restart computer.
3 If mouse was connected to keyboard, connect mouse to rear
ADB port and disconnect keyboard. If mouse works, replace
keyboard.
4 If mouse does not work in ADB port, replace mouse.
5 Replace logic board. Retain customer’s DIMMs.
1 Verify that system software is version 7.5.3 or later.
2 Check keyboard connection to ADB port.
3 Replace keyboard.
4 Reseat logic board.
5 Replace logic board. Retain customer’s DIMMs.
Troubleshooting Symptom Charts/Peripheral - 14
Peripheral
Known-good
StyleWriter does not
print
Known-good
LaserWriter does not
print
1 Verify that Chooser is set correctly.
2 Verify that printer driver and system software are not
corrupt.
3 Verify system software is version 7.5.3 or later.
4 Replace printer interface cable.
5 Replace logic board. Retain customer’s DIMMs.
1 Verify that Chooser is set correctly.
2 Verify that printer driver and system software are not
corrupt.
3 Verify system is properly connected to printer.
Troubleshooting Symptom Charts/Miscellaneous - 15
Miscellaneous
No audio, and no drive
operation
“Sad Macintosh” icon 1 Start up from known-good disk.
1 Connect power cable.
2 Switch power on.
3 Replace power cable.
4 Replace logic board. Retain customer’s DIMMs.
2 Replace DIMMs.
3 Replace logic board. Retain customer’s DIMMs.
Troubleshooting Symptom Charts/Miscellaneous - 16
Miscellaneous
Screen shows “Sad
Macintosh” icon and
black vertical lines;
screeching sound
Headphone jack does
not operate correctly
1 Replace DIMMs.
2 Replace logic board. Retain customer’s DIMMs.
Verify that headphone jack is seated properly.
K
Service Source
T ak e Apart
Power Macintosh 4400
Take Apart Top Housing - 1
Top Housing
No preliminary steps are
required before you begin
this procedure.
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart Top Housing - 2
1 Remove the screws that
secure the housing to
the rear of the chassis.
Take Apart Top Housing - 3
2 Firmly grasp both sides
of the top housing at the
back of the unit. Wrap
your fingers around to
the back of the unit.
Push on the rear chassis
to slide the housing back
about 10 mm.
3 Lift the top housing and
remove it from the
computer.
Replacement Note:
the top housing on the
computer, aligning the sides
with the chassis rails.
Position the top housing
about 10 mm from the front
Place
Take Apart Top Housing - 4
panel. Slide the top housing
forward until it fits into
place. If the lid doesn’t fit
properly, check the link bar
to be sure it is installed
correctly. Also, if the
floppy/CD-ROM drive carrier
was removed, make sure the
carrier hooks correctly into
the bottom of the chassis.
Replace the rear screws.
Take Apart Link Bar - 5
Link Bar
Before you begin, remove
the top housing.
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart Link Bar - 6
1 Detach the pegs of the
link bar from the slots in
the rear of the
computer.
Take Apart Link Bar - 7
2 Slide the link bar back
about half an inch and
lift the link bar out.
Take Apart Link Bar - 8
Replacement Note:
replace the link bar, position
the bar so that it firmly
holds the PCI adapter board
and disk drive carriers. Slide
the link bar toward the front
panel until it fits into place.
The three hooks at the
bottom of the link bar must
catch the floppy/CD-ROM
drive carrier. If it doesn’t fit
correctly after the floppy/
CD-ROM drive carrier was
removed, make sure the
carrier was installed
correctly.
Press the rear of the bar to
To
Take Apart Link Bar - 9
lock the pegs into the slots
in the rear of the chassis.
Take Apart Front Bezel - 10
Front Bezel
Before you begin, remove
the following:
• Top housing
• Link bar
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart Front Bezel - 11
1 Press the three front
bezel release tabs inside
the chassis.
2 Remove the bezel from
the chassis.
Take Apart Front Bezel - 12
Replacement Note:
the three tabs at the front
base of the chassis. Snap
the release tabs into place.
Insert
Take Apart Cache Card - 13
Cache Card
Before you begin, remove
the top housing.
Note:
Do not touch the
connectors. Handle only by
the edges.
Take Apart PCI Adapter Card - 14
PCI Adapter Card
Before you begin, remove
the following:
• Top housing
• Link bar
Caution:
precautions in Bulletins/
Safety.
Press the connector down
while pulling up on the PCI
adapter card to remove it
from the logic board slot.
Review the ESD
Take Apart Hard Drive Carrier - 15
Hard Drive Carrier
Before you begin, remove
the top housing.
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart Hard Drive Carrier - 16
1 Lift up the hard drive
carrier to detach it from
the hooks on the floppy/
CD-ROM drive carrier.
Take Apart Hard Drive Carrier - 17
2 Disconnect the power
and data cables attached
to the hard drive.
Take Apart Hard Drive Carrier - 18
Caution:
on the exposed hooks and
become damaged.
Replacement Note:
the hard drive carrier on the
hooks that attach it to the
floppy/CD-ROM drive carrier.
Cables can catch
Place
Take Apart Hard Drive - 19
Hard Drive
Before you begin, remove
the following:
• Top housing
• Hard drive carrier
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart Hard Drive - 20
1 Remove the four screws
that secure the hard
drive to the hard drive
carrier.
2 Remove the hard drive
from the carrier.
Replacement Note:
the hard drive on the hard
drive carrier. Replace the
four screws to secure the
hard drive to the carrier.
Connect the hard drive
cables to the hard drive.
Place the hard drive carrier
on the hooks that attach it
to the floppy/CD-ROM drive
carrier.
Position
Take Apart Floppy/CD-ROM Drive Carrier - 21
Floppy/CD-ROM Drive Carrier
Before you begin, remove
the following:
• Top housing
• Link bar
• Front bezel
• Hard drive carrier
• PCI adapter card
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart Floppy/CD-ROM Drive Carrier - 22
1
Note:
Press the plastic
release tab on the audio
tab to remove it.
Disconnect the audio,
data, and power cables
from the CD-ROM drive.
Take Apart Floppy/CD-ROM Drive Carrier - 23
2 Disconnect the data
cable from the floppy
drive.
3 Pull the floppy/CD-ROM
drive carrier about 1 cm
away from the front
panel and toward the
CD-ROM drive to avoid
catching the metal hook
under the logic board.
Take Apart Floppy/CD-ROM Drive Carrier - 24
4 Lift the carrier out of the
computer.
Take Apart Floppy/CD-ROM Drive Carrier - 25
Replacement Note:
the power button and LED
wires are firmly held under
the clips and clear of the
floppy/CD-ROM carrier path.
These wires are easily cut
when the drive carrier slides
across them. Also pull the
power supply wires out of
the way. Guide the CD-ROM
drive under the metal spring
tabs at the top of the
opening in front of the
chassis. Align the carrier
with the metal tabs at the
base of the chassis and slide
the carrier toward the
chassis front until it fits into
Be sure
Take Apart Floppy/CD-ROM Drive Carrier - 26
place. Look at the front of
the chassis to be sure the
bottom edge of the CD-ROM
drive carrier isn’t caught
under the metal lip of the
chassis CD-ROM drive
opening. Be sure the drive
carrier metal tab at the
bottom left of the floppy
drive is all the way through
the slot in the chassis front
opening.
Take Apart CD-ROM Drive - 27
CD-ROM Drive
Before you begin, remove
the following:
• Top housing
• Link bar
• PCI adapter card
• Front bezel
• Hard drive carrier
• Floppy/CD-ROM drive
carrier
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart CD-ROM Drive - 28
1
Note:
A long-neck
Phillips screw driver will
make it easier to remove
the CD-ROM screws
under the floppy carrier.
Remove the four screws
that secure the CD-ROM
drive to the floppy/CDROM drive carrier.
2 Remove the CD-ROM
drive from the carrier.
Take Apart CD-ROM Drive - 29
Replacement Note:
the CD-ROM drive on the
drive bay. Replace the
screws on both sides of the
CD-ROM drive to secure it to
the carrier. Replace the drive
carrier in the computer,
aligning the carrier with the
tabs at the base of the
housing. Fasten the hard
drive carrier on the hooks on
the side of the floppy/CDROM drive carrier. Connect
the CD-ROM drive cables.
Position
Take Apart Floppy Drive - 30
Floppy Drive
Before you begin, remove
the following:
• Top housing
• Link bar
• Front bezel
• PCI adapter card
• Hard drive carrier
• Floppy/CD-ROM drive
carrier
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart Floppy Drive - 31
1 Remove the four screws
under the floppy drive
bay that secure the
Apple SuperDrive to the
floppy/CD-ROM drive
carrier.
2 Remove the Apple
SuperDrive from the
carrier.
Replacement Note:
the floppy drive on the bay
of the carrier. Replace the
four screws that secure the
floppy drive to the carrier.
Replace the drive carrier in
the chassis aligning the
carrier with the tabs at the
Position
Take Apart Floppy Drive - 32
base of the housing. Fasten
the hard drive carrier on the
hooks on the side of the
floppy/CD-ROM drive carrier.
Connect the floppy drive
cables.
Take Apart Logic Board - 33
Logic Board
Before you begin, remove
the following:
• Top housing
• Link bar
• Front bezel
• PCI adapter card
• Hard drive carrier
• Floppy/CD-ROM drive
carrier
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart Logic Board - 34
1
Note:
Press the release
tab of the soft-power
connector to remove it.
Grasp the plastic
connector (not the
wires) when removing
the CD audio cable.
Disconnect all cables
from the logic board.
Refer to the logic board
diagram at the end of
this section.
Take Apart Logic Board - 35
2 Press the release tab
near the front panel to
release the logic board.
Take Apart Logic Board - 36
3 Raise up the front of the
logic board and pull the
external ports out of the
access holes in the rear
of the chassis. Guide the
logic board away from
the power supply.
Replacement Note:
pull the power switch and
speaker cables into the
opening over the speaker/
fan assembly to keep the
wires from being covered by
the logic board. Tilt the logic
board up slightly to insert
the external ports on the
logic board into the access
Gently
Take Apart Logic Board - 37
holes in the back of the
chassis. Lower the front of
the logic board so that the
pegs in the housing base fit
into the logic board holes.
Press the front edge of the
logic board down until the
release tab clicks. Connect
all cables to the proper
sockets on the logic board.
(See the diagram on the
next page. Two 4-pin
connectors from the power
supply have no sockets, and
will remain unconnected.)
The LED connector must be
plugged in so that the arrow
goes over pin 1 on the logic
Take Apart Logic Board - 38
board.
Take Apart Logic Board - 39
Speaker
Front Bezel
Power Switch
LED
Fan
IDE Hard
Drive
IDE ATAPI
CD-ROM Drive
Cable Connection Slots
CD-ROM
Audio
Floppy
Drive
PCI Adapter
Slot
SCSI
Power Supply
Power Supply
Soft Power
Take Apart Power Supply - 40
Power Supply
Before you begin, remove
the following:
• Top housing
• Link bar
• Hard drive carrier
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart Power Supply - 41
1
Note:
Press the release
tab of the soft-power
connector to remove it.
Take Apart Power Supply - 42
Disconnect the five
power supply cables
from the logic board
sockets.
Take Apart Power Supply - 43
2 Disconnect the power
supply connectors from
the hard drive and CDROM drive.
Take Apart Power Supply - 44
3 Remove the 4 screws
that secure the power
supply to the rear of the
chassis.
Take Apart Power Supply - 45
4 Push the power supply
about one cm from the
rear of the chassis and
lift it out of the
computer.
Replacement Caution:
power supply cable
connectors that attach to
the logic board are keyed
with matching notches. It is
possible to force the
connectors into the wrong
sockets, and this could
cause serious damage to the
computer. Be sure the
connectors are in the
correct sockets.
The
Take Apart SCSI Cable - 46
SCSI Cable
Before you begin, remove
the following:
• Top housing
• Link bar
• PCI adapter card
Caution:
precautions in Bulletins/
Safety.
Review the ESD
Take Apart SCSI Cable - 47
1 Remove the two hex
nuts that secure the
SCSI cable to the rear of
the chassis.
Take Apart SCSI Cable - 48
2 Disconnect the SCSI
cable from the logic
board.
3 Remove the SCSI cable
from inside the chassis.
K
Service Source
Upgrades
Power Macintosh 4400
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