Apple macintosh se Service Manual

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Macintosh SE

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Basics

Macintosh SE

Basics Overview - 1

Overview

This manual contains
complete repair procedures
for the Macintosh SE, shown
at left.

Figure: Macintosh SE

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Specifications

Macintosh SE

Specifications Processor - 1

Processor

CPU

Motorola 68000 microprocessor

7.83 MHz
32-bit architecture

Specifications Memory - 2

Memory

RAM

ROM

PRAM

1 or 2 MB, expandable to 4 MB

256K

256 bytes of memory
CMOS custom chip with seven-year lithium battery

Specifications Disk Storage - 3

Disk Storage

Floppy Drive

Hard Drive

1.4 MB floppy drive
Optional second internal and external floppy drive

Optional 20 or 40 MB hard drive
Optional external hard drive

Specifications I/O Interfaces - 4

I/O Interfaces

Expansion

SCSI

Apple Desktop Bus

Serial

Sound

Macintosh SE expansion slot; uses a 96-pin Euro-DIN connector

Uses a 50-pin connector (internal) and a DB-25 connector

(external)

Two Apple Desktop Bus (ADB) connectors for communication with

keyboard, mouse, and other input devices

Two RS-232/RS-422 serial ports; 230.4 Kbaud maximum; mini

DIN-8 connectors

For external audio amplifier (standard miniature)

Specifications I/O Devices - 5

I/O Devices

Keyboards

Mouse

Apple Keyboard: 81 keys, including numeric keypad and cursor

keys

Apple Extended Keyboard: 105 keys, including 15 function keys,

separate cursor pad, and 10-key numeric keypad

Mechanical tracking; optical shaft at 3.94 pulses per mm (100

pulses per in.) of travel; ADB connector

Specifications Sound and Video - 6

Sound and Video

Sound Generator

Video Display

Four-voice sound with 8-bit digital/analog conversion using 22-

kHz sampling rate

9-in. (diagonal) screen; high-resolution, 512 by 342 pixel,

bit-mapped display

Specifications Electrical - 7

Electrical

Line V oltage

Frequency

Maximum Power

90–140 VAC; 170–270 VAC

47–63 Hz

100 W

Specifications Physical - 8

Physical

Dimensions

Weight

Height: 13.6 in. (34.5 cm)
Width: 9.6 in. (24.4 cm)
Depth: 10.9 in. (27.6 cm)

17–21 lb. (7.7–9.5 kg)
Weight varies depending on whether hard drive or second floppy

drive is installed

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Troubleshooting

Macintosh SE

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/Video - 2

Symptom Charts

Video

Screen is dark; audio
and drive operate

Screen is bright and
audio is present, but
no video information
is visible

1 Turn brightness control clockwise.
2 Check video cable connections.
3 Replace analog board.
4 Replace video board.
5 Replace logic board. Retain customer’s SIMMs.
6 Replace CRT.

1 Replace analog board.
2 Replace video board.
3 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Video

(Continued)

- 3

Screen is completely
dark and fan is not
running

Single vertical line is
displayed

Single horizontal line
is displayed

Video

1 Replace power supply.
2 Replace analog board.

1 Replace analog board.
2 Replace video board.
3 Replace logic board. Retain customer’s SIMMs.
4 Replace CRT.

1 Replace analog board.
2 Replace video board.
3 Replace logic board. Retain customer’s SIMMs.
4 Replace CRT.

(Continued)

Troubleshooting Symptom Charts/Video

(Continued)

- 4

Vertical bars or
stripes are displayed

Horizontal bars or
stripes are displayed

White dot is displayed
in center of screen

Screen jitters at top
left and/or lower
right

Video

1 Replace logic board. Retain customer’s SIMMs.
2 Replace analog board.

1 Replace logic board. Retain customer’s SIMMs.
2 Replace analog board.

1 Verify that yoke cable is connected.
2 Replace analog board.
3 Replace CRT.

Replace analog board.

(Continued)

Troubleshooting Symptom Charts/Peripheral - 5

Peripheral

Cursor does not move 1 Check mouse connection.

2 Inspect inside of mouse for buildup of dirt and other

contaminants. Clean mouse if necessary.

3 If mouse was connected to keyboard, connect it to ADB port

instead. If mouse works, replace keyboard.
4 If mouse does not work in any ADB port, replace mouse.
5 Replace logic board. Retain customer’s SIMMs.

Cursor moves, but
clicking mouse
button has no effect

No response to any
key on keyboard

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

1 Check keyboard connection to ADB port.
2 Replace keyboard cable.
3 Replace keyboard.
4 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Peripheral

(Continued)

- 6

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

Peripheral

1 Remove any multiple system files on hard drive.
2 Clear parameter RAM. (System 7: Hold down <Command>

<Option> <P> <R> during startup but before “Welcome to

Macintosh” appears. System 6: Hold down <Command>

<Option> <Shift> keys and select Control Panel from Apple

pull-down menu.) Reset mouse controls.
3 If mouse was connected to keyboard, connect it to ADB port

instead. If mouse works, replace keyboard.
4 If mouse does not work in any ADB port, replace mouse.
5 Replace logic board. Retain customer’s SIMMs.

(Continued)

Troubleshooting Symptom Charts/Peripheral

(Continued)

- 7

Known-good
LaserWriter does not
print

Known-good
ImageWriter or
ImageWriter II does
not print

Peripheral

1 Make sure that Chooser and Control Panel are set correctly.
2 Make sure correct version of system software is being used.

Make sure software is known-good.
3 Reset PRAM.
4 Refer to Networks and Communications manual.

1 Make sure that Chooser and Control Panel are set correctly.
2 Make sure correct version of system software is being used.

Make sure software is known-good.
3 Reset PRAM.
4 Replace printer interface cable.
5 Replace logic board. Retain customer’s SIMMs.

(Continued)

Troubleshooting Symptom Charts/Floppy Drive - 8

Floppy Drive

Audio and video are
present, but one
internal floppy drive
does not operate

External floppy drive
does not operate

Disk ejects; display
shows icon with
blinking “X”

1 Replace bad disk.
2 Replace floppy drive data cable.
3 Replace internal floppy drive.
4 Replace logic board. Retain customer’s SIMMs.

1 Replace bad disk.
2 Make sure external floppy drive is on right side of Macintosh

SE/30.
3 Replace external drive.
4 Replace logic board. Retain customer’s SIMMs.

1 Replace disk with known-good system disk.
2 Replace floppy drive.
3 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Floppy Drive

(Continued)

- 9

Floppy Drive

Unable to insert disk
all the way

Internal floppy drive
runs continuously

Does not eject disk 1 Insert opened paper clip into hole beside drive.

1 Insert opened paper clip into hole beside drive.
2 Switch off system power and hold mouse button down while

switching power back on (to complete eject cycle).
3 Replace floppy drive.

1 Replace bad disk.
2 Replace floppy drive.
3 Replace logic board. Retain customer’s SIMMs.
4 Replace floppy drive data cable.

2 Switch off system and hold mouse button down while

switching system back on (to complete eject cycle).
3 Replace floppy drive.

(Continued)

Troubleshooting Symptom Charts/Floppy Drive

(Continued)

- 10

Audio and video are
present, but neither
internal floppy drive
operates

Floppy Drive

1 Replace bad disk.
2 Replace logic board. Retain customer’s SIMMs.

(Continued)

Troubleshooting Symptom Charts/Hard Drive - 11

Hard Drive

Internal or external
hard drive does not
operate

Works with internal
or external SCSI
device but not with
both

1 Verify that SCSI loopback card is not attached.
2 Replace hard drive data cable.
3 Replace hard drive.
4 Replace logic board. Retain customer’s SIMMs.

1 Verify SCSI device switch setting on external device.
2 Replace terminator on external device.
3 Verify that terminator is installed on internal hard drive.
4 Replace hard drive select cable.

Troubleshooting Symptom Charts/Miscellaneous - 12

Miscellaneous

Clicking, chirping,
or thumping sound

Smoke/odor 1 Replace power supply.

No video, no audio, and
no drive operation

1 Verify analog board cable is connected at J12 on logic board.
2 Replace power supply.
3 Replace analog board.
4 Replace logic board. Retain customer’s SIMMs.

2 Replace analog board.

1 Connect power cord.
2 Switch power on.
3 Replace power cord.
4 Replace power supply.
5 Replace analog board.
6 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Miscellaneous

(Continued)

- 13

Miscellaneous

“Sad Macintosh” icon 1 Replace bad disk.

2 Replace SIMM(s) if code matches any of those given in

“Isolating a Faulty SIMM” in Hardware/Memory.
3 Verify that three-pin jumper on logic board is configured

correctly for system RAM. See Hardware/Memory.
4 Replace logic board. Retain customer’s SIMMs.

“Sad Macintosh” icon
and black vertical
line are displayed;
screeching sound

1 Verify that three-pin jumper on logic board is configured

correctly for system RAM. See Hardware/Memory.
2 Replace logic board. Retain customer’s SIMMs.

(Continued)

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Service Source

T ak e Apart

Macintosh SE

Take Apart Cover - 1

Cover

Cover

No preliminary steps are
required before you begin
this procedure.

±

Warning:

contains high voltage and a
high-vacuum picture tube.
To prevent serious injury,
review CRT safety in
Bulletins/Safety.

1 Using a small

screwdriver, pry off
the reset/interrupt
switch (if present).

This product

Take Apart Cover - 2

2 Using a Torx

screwdriver, remove
the four case screws and
separate the cover from
the chassis with a pull­apart tool.

3 Carefully lift up the

cover and set it aside.

4 Remove the paper

insulating shroud from
the bottom of the
computer.

Take Apart Cover - 3

Replacement Note:

Reinstall the two black case
screws in the bottom of the
cover and the two silver­colored case screws in the
top of the cover.

Take Apart Analog Board & Power Supply - 4

Analog Board

Power
Supply

Analog Board & Power Supply

Before you begin,

• Remove the cover

• Discharge the CRT

• R emove the anode cap

Caution:

discharge the CRT to the
ground lug. Failure to do so
could damage the logic board
or the analog board.

Caution:

grounding wriststrap until
after discharging the CRT.

Be sure to

Never use a

Take Apart Analog Board & Power Supply - 5

1 Carefully pull the video

board straight off the
neck of the CRT.

2 Remove the screw that

secures the power
supply ground wire to
the chassis.

Video Board

Ground Wire

Take Apart Analog Board & Power Supply - 6

Yoke Cable

Logic Board Cable

3 Disconnect these cable

connectors from the
analog board:

• Yoke cable (First
depress the tab.)

• Logic board cable

• Video board cable

• Hard drive power
cable

Video
Board

Cable

Hard Drive
Power Cable

Take Apart Analog Board & Power Supply - 7

4 Remove the four screws

that secure the analog
board to the chassis.

5 Remove the metal clip

from the corner of the
board.

Metal Clip

Take Apart Analog Board & Power Supply - 8

6

Caution:

removing the analog
board, be careful not to
catch the brightness
control knob on the
chassis and not to bump
the neck of the CRT.

Grasp the analog board
by its edges and pull the
board up and out of the
chassis.

When

Take Apart Analog Board & Power Supply - 9

7 Place the analog board on

a protective pad and
disconnect the power
supply cable.

Power Supply

Cable

Take Apart Analog Board & Power Supply - 10

8 Remove the four screws

and separate the power
supply from the analog
board.

Brightness

Control Knob

Replacement Note:

If you
are replacing a defective
analog board, remove and
keep the brightness control
knob.

Take Apart Analog Board & Power Supply - 11

Ferrite Bead

Replacement Note:

If you
receive a replacement analog
board that is packaged with a
ferrite bead, and if the
customer’s video cable does
not have a ferrite bead
attached, install the
packaged ferrite bead on the
video cable as shown.
Secure the ferrite bead to
the cable with a tie-wrap.

Replacement Note:

If you
replace the analog or power
supply, perform the video
adjustment procedure. See
“Video” in Adjustments.

Take Apart Logic Board - 12

Logic Board

Before you begin,

• Remove the cover

• Discharge the CRT

Logic Board

Caution:

discharge the CRT to the
ground lug. Failure to do so
could damage the logic board
or the analog board.

Warning: Never use a
grounding wriststrap until
after discharging the CRT.

Be sure to

Take Apart Logic Board - 13

Floppy Drive Cable

Power Supply Cable

Hard Drive
Data Cable

1 Carefully pull the video

board straight off the
neck of the CRT.

2 Disconnect these cable

connectors from the
logic board:

• Hard drive data cable
(if present)

• Internal floppy drive
cable(s)

• Power supply cable

Note:

You must first
depress the holding clip
to remove the power
supply cable.

Take Apart Logic Board - 14

3 Slide up the logic board

until its tabs are aligned
with the notches in the
chassis. Swing out the
right side of the board
and remove it from the
chassis.

Take Apart Logic Board - 15

4 Disconnect the speaker

cable from the logic
board.

Speaker Cable

Replacement Note:

If you
are replacing a defective
logic board, you must use an
exchange logic board that is
configured the same as the
customer’s original board.
See “Identifying SE Logic
Boards” in the Additional
Procedures chapter for
more information.

Take Apart Video Board - 16

Video Board

Before you begin,

• Remove the cover

• Discharge the CRT

Video Board

Caution:

discharge the CRT to the
ground lug. Failure to do so
could damage the logic board
or the analog board.

Warning:

grounding wriststrap until
after discharging the CRT.

Be sure to

Never use a

Take Apart Video Board - 17

1 Carefully pull the video

board straight off the
neck of the CRT.

2 Disconnect the video

board connector from the
analog board.

3 Remove the Torx screw

and video ground wire
from the upper-left
CRT mounting bracket.

Replacement Note:

replace the video board,
perform the video
adjustment procedure. See
“Video” in Adjustments.

If you

Take Apart Video Board - 18

Replacement Note:

Replacement video boards
are installed vertically on
the CRT. The vertically­mounted video board
requires using the axial
(round) fan.

Take Apart CRT - 19

CRT

Before you begin,

• Remove the cover

• Discharge the CRT

• Remove the anode cap

• Remove the video board

CRT

• Remove the analog board

(only)

Take Apart CRT - 20

1 With the CRT face-down

on a protective pad, use a
Torx screwdriver to
remove the three
remaining CRT
mounting screws.

2 Lift the CRT off the

bezel.

Replacement Note:

replace the CRT, perform
the video and yoke
adjustment procedures. See
“Video” and “Yoke” in the
Adjustments chapter.

If you

Take Apart Hard Drive - 21

Hard Drive

Before you begin,

• Remove the cover

• Discharge the CRT

• Remove the video board

Hard Drive

Take Apart Hard Drive - 22

Hard Drive
Power Cable

Hard Drive Data Cable

Warning:

Never use a
grounding wriststrap until
after discharging the CRT.

1 Disconnect the hard

drive data cable from the
hard drive and the logic
board. Keep the cable.

2 Disconnect the hard

drive power cable from
the analog board.

Take Apart Hard Drive - 23

3 Remove the two

mounting screws and
lift out the hard drive
with carrier attached.

Replacement Note:

information on removing the
hard drive from the carrier
and returning drives,
cables, and carriers to
Apple, refer to “Additional
Procedures” in the Hard
Drives manual.

For

Take Apart Hard Drive - 24

Revision A

Revision B

Replacement Note:

If you
are replacing a defective
Hard Disk 20SC, be aware
that Apple currently ships
Revision A and Revision B
versions of this hard drive
and each version must be
replaced like-for-like. To
differentiate between drive
versions, check their
circuit boards. For Revision
A drives, the component
side of the board is up; for
Revision B drives, the
solder side of the board is
up. For part numbers,
refer to the Service Source
parts database.

Take Apart LED Cable Assembly - 25

LED Cable Assembly

Before you begin,

• Remove the cover

• Discharge the CRT

• Remove the hard drive

LED Cable Assembly

Take Apart LED Cable Assembly - 26

1 Disconnect the LED

connector from the hard
drive.

2 Pull open the release

tab at the back of the LED
and push the LED
through the carrier
bracket.

Take Apart Upper Floppy Drive - 27

Upper Floppy Drive

Before you begin,

• Remove the cover

• Discharge the CRT

• Remove the video board

Upper Floppy Drive

Take Apart Upper Floppy Drive - 28

1 Disconnect the upper

floppy drive cable from
logic board connector J7.

2 Remove two mounting

screws and the metal
bracket that connects the
upper and lower floppy
drives.

Take Apart Upper Floppy Drive - 29

3 Lift and slide out the

upper floppy drive.
Disconnect and keep the
floppy drive cable.

Floppy Drive
Cable

Replacement Note:

Apple
recommends using dust
shields on all 1.4 MB floppy
drives. All 1.4 MB
replacement drives ship
with the dust shield
installed. If you plan to
install a dust shield on an
existing 1.4 MB drive, you
must first clean the drive
(see the Hard Drives
manual).

Take Apart Lower Floppy Drive - 30

Lower Floppy Drive

Before you begin,

• Remove the cover

• Discharge the CRT

• Remove the video board

• Remove the upper drive

• Remove the logic board

Lower Floppy Drive

Take Apart Lower Floppy Drive - 31

Remove the four mounting

Floppy Drive

Cable

screws and lift out the lower
floppy drive. Disconnect and
keep the floppy drive cable.

Replacement Note:

Apple
recommends using dust
shields on all 1.4 MB floppy
drives. All 1.4 MB
replacement drives ship
with the dust shield
installed. If you plan to
install a dust shield on an
existing 1.4 MB drive, you
must first clean the drive
(see the Hard Drives
manual).

Take Apart Fan Assembly - 32

Fan Assembly

Fan Assembly

Before you begin,

• Remove the cover

• Discharge the CRT

• Remove the video board

• Remove the analog board

and power supply.

Take Apart Fan Assembly - 33

1 Compress the arrow

clips and remove the
insulating paper from

Arrow Clips

Insulating Paper

the analog board.

Take Apart Fan Assembly - 34

2 Check the front and back

of the analog board for
wires connecting the fan
to the board. Desolder

Solder Point

these wires at their
solder points at the back

Solder Point

Solder Point

of the analog board.
Using a matte knife, cut
away any excess solder.

(Solder Side)

Fan Wires

Solder Point

Solder Point Solder Point

(Component Side)

Take Apart Fan Assembly - 35

3 Remove the four

mounting screws and
lockwashers and remove
the fan assembly from
the analog board.

Note:

On earlier
versions of the analog
board you may have to

(Solder Side)

Fan Solder Points

desolder the fan itself
from the analog board at
the solder points shown.

Take Apart Fan Assembly - 36

Replacement Caution:

you are replacing the fan
with the newer axial
(round) fan, make sure
your customer’s system has
the redesigned, vertically­mounted video board
installed on the CRT. The
axial fan does not allow
adequate vibration
clearance with the old,
horizontally-mounted video
board.

If

Take Apart Fan Assembly - 37

Black Wire

Yellow Wire

(Solder Side)

Replacement Note:

Some
replacement fans have a
black wire and a yellow wire
that must be soldered to the
back side of the analog board.
Insert these wires through
the arrow clip hole in the
board and solder them to the
points shown.

Take Apart Speaker, Bezel, & Slot Cover - 38

Speaker, Bezel, & Slot Cover

Speaker, Bezel, &
Slot Cover

Before you begin,

• Remove the cover

• Discharge the CRT

• Remove the video board

• Remove the analog board

(only)

• Remove the logic board

Take Apart Speaker, Bezel, & Slot Cover - 39

1 Remove the five Torx

screws and lift the
chassis (with attached
drives) off the front
bezel.

Take Apart Speaker, Bezel, & Slot Cover - 40

2 To remove the speaker,

cut away (with a matte
knife) the melted
plastic that secures the
speaker to the inside of
the front bezel.

3 Lift out the speaker.

Take Apart Speaker, Bezel, & Slot Cover - 41

4 To remove the slot

cover, cut away (with an
art knife) the melted
plastic that secures the
slot cover to the inside of
the front bezel.

5 To remove the front

bezel, remove the CRT.
(See “CRT” in Take
Apart).

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Service Source

Upgrades

Macintosh SE

Upgrades Memory Upgrade - 1

Memory Upgrade

Before you begin,

• Remove the cover

• Discharge the CRT

• Remove the logic board

±

Logic Board

Warning:

contains high voltage and a
high-vacuum picture tube.
To prevent serious injury,
review CRT safety in
Bulletins/Safety.

±

Warning:

grounding wriststrap until
after discharging the CRT.

This product

Never use a

Upgrades Memory Upgrade - 2

Note:

Two logic boards are
available for the Macintosh
SE. The original board uses a
solder-type resistor to
identify system memory
configurations; a resistor is
installed in R35 for 1 MB
and in R36 for 2 MB. The
revised logic board uses a
jumper to identify system
memory.

Resistor/Jumper
Slot 1
Slot 3

Slot 2
Slot 4

Upgrades Memory Upgrade - 3

Note:

The Macintosh SE
requires 150-ns (or
faster) SIMMs. RAM speed is
indicated by the -xx number
after the manufacturer’s
part number (-15
indicates a 150-ns SIMM).

Upgrades Memory Upgrade - 4

Logic Board with Resistor

Clip one end of resistor R35
or R36 and move the
resistor away from the
clipped lead.

Slot 1

Slot 3

Resistor

Slot 2

Slot 4

Replacement Note:

Clipping the resistor and
moving it away will allow
you to retack the resistor in
the future.

Upgrades Memory Upgrade - 5

2.5 MB Upgrade

Install two 1 MB SIMMs in
slots 1 and 2 and install two
256K SIMMs in slots 3 and

4.

4 MB Upgrade

Install four 1 MB SIMMs in
slots 1 through 4.

Upgrades Memory Upgrade - 6

Logic Board with Jumper

1 MB to 2.5 MB

Remove the two 256K
SIMMs from slots 3 and 4.
Install two 1 MB SIMMs in
slots 3 and 4. Remove the
jumper permanently.

1 MB to 4 MB

Remove all four 256K
SIMMs. Install four 1 MB
SIMMs. Remove the jumper
permanently.

Slot 1

Slot 3

Jumper

Slot 2
Slot 4

Upgrades Memory Upgrade - 7

Note:

Disregard the jumper
label “2/4 M” on the logic
board. A 4 MB upgrade
requires the removal of the
jumper.Ê

Upgrades Memory Upgrade - 8

2 MB to 2.5 MB

Install two 256K SIMMs in
slots 1 and 2. Remove the
jumper permanently.

2 MB to 4 MB

Install two 1 MB SIMMs in
slots 1 and 2. Remove the
jumper permanently.

Note:

Disregard the jumper
label “2/4 M” on the logic
board. A 4 MB upgrade
requires the removal of the

Slot 1

Slot 3

Slot 2
Slot 4

jumper.

Upgrades Logic Board Upgrade - 9

Logic Board Upgrade

Before you begin,

• Remove the cover

• Discharge the CRT

• Remove the video board

• Remove the logic board

• Remove the analog board

(only)

• Remove the upper drive

• Remove the CRT

• Remove the bezel

Logic Board

Upgrades Logic Board Upgrade - 10

±

Warning:

contains high voltage and a
high-vacuum picture tube.
To prevent serious injury,
review CRT safety in
Bulletins/Safety.

This product

Caution:

the CRT, wear a grounding
wriststrap to prevent ESD
damage to components.

After discharging

Upgrades Logic Board Upgrade - 11

Note:

The Logic Board
Upgrade Kit for the
Macintosh SE includes the
SE/30 logic board, a new
bezel, a ferrite bead and tie­wrap for EMI protection, a
new chassis and bracket, a
new RFI shroud, two labels,
and a return sheet that you
must fill out and return to
Apple with the SE logic
board.

Upgrades Logic Board Upgrade - 12

Note:

The SE/30 logic
board requires a minimum

Chassis Bracket

of four identical RAM
SIMMs. Customers whose
Macintosh SE systems have

2.5 MB or less of RAM must
purchase additional RAM
SIMMs.

Note:

The new chassis
comes in two pieces (a
chassis and a bracket) that
you must assemble before
installation.

1 Install the bracket on the

chassis with three
mounting screws.Ê

Upgrades Logic Board Upgrade - 13

2 Install the CRT on the

new bezel with three
Torx screws.

3 Remove the lower

floppy drive from the old
chassis and install it on
the new chassis. Refer
to “Lower Floppy
Drive” in Take Apart.

Upgrades Logic Board Upgrade - 14

4 Install the new chassis

on the new bezel with
five Torx screws.

5 Install the hard drive or

upper floppy drive on
the new chassis. Refer
to “Hard Drive” or
“Upper Floppy Drive”
in Take Apart.

6 Replace the analog board.

Refer to “Analog Board”
in Take Apart.

7 Install the new SE/30

logic board. Refer to
“Logic Board” in Take
Apart.

Upgrades Logic Board Upgrade - 15

8 Clasp the clip-on ferrite

bead around the video
board cable as near the
video board connector as
possible. Secure the
ferrite bead near the
connector with tie­wraps.

9 Replace the video board.

Tie-Wrap

Refer to “Video Board”
in Take Apart.

10 Install the new

insulating shroud over
the bottom of the SE and
replace the cover. Refer
to “Cover” in Take
Apart.

Ferrite Bead

Upgrades Logic Board Upgrade - 16

11 Attach the agency

approval label over the
previous agency label on
the back of the cover.

Drive Labels

Agency Approval Label

12 Attach the appropriate

drive label in the groove
to the left of the disk
drive slot on the new
bezel.

13 Install system software

(6.03 or later) and run
diagnostics on the
upgraded unit.

Upgrades 1.4 MB Drive Upgrade - 17

1.4 MB Drive Upgrade

Before you begin,

• Remove the cover

• Discharge the CRT

• Remove the video board

• Remove the hard drive or

upper floppy drive

• Remove the logic board

• Remove the lower floppy

drive

Upgrades 1.4 MB Drive Upgrade - 18

±

Warning:

contains high voltage and a
high-vacuum picture tube.
To prevent serious injury,
review CRT safety in
Bulletins/Safety.

±

Warning:

grounding wriststrap until
after discharging the CRT.

This product

Never use a

Upgrades 1.4 MB Drive Upgrade - 19

Note:

The 1.4 MB
SuperDrive Upgrade Kit
available for the Macintosh
SE includes two new ROMs, a
SWIM disk controller chip,
an audio extension cable for
reducing EMI interference,
the new 1.4 MB SuperDrive,
system software, two labels,
and an Apple product return
form.

Upgrades 1.4 MB Drive Upgrade - 20

Note:

The 1.4 MB
SuperDrive must be used
with system software
version 6.0.3 or higher or
the Macintosh SE mistakes
the high-density drive for
an 800K mechanism.

1 Using an IC extractor,

remove the IWM chip
and two ROM chips from
the logic board.

Upgrades 1.4 MB Drive Upgrade - 21

2 Install the SWIM chip

and two new ROM chips
on the logic board as
follows:

• SWIM (344–0062)
at D8

• High ROM (342–

0701) at D6

RAM SIMMs

• Low ROM (342–

0702) at D7

Note:

The notch at one
end of the SWIM chip and
each ROM chip must face

RAM SIMMs

toward the RAM SIMMs.

Upgrades 1.4 MB Drive Upgrade - 22

3 Install the lower floppy

drive (the new 1.4 MB
drive). Refer to “Lower
Floppy Drive” in Take
Apart.

4 Replace the logic board.

Refer to “Logic Board”
in Take Apart.

Upgrades 1.4 MB Drive Upgrade - 23

5 Replace the hard drive

or upper floppy drive.
Refer to “Hard Drive”
or “Upper Floppy
Drive” in Take Apart.

6 Replace the video board

and the cover. Refer to
“Video Board” and
“Cover” in Take Apart.

7 Place the high density

drive label in the groove
next to the lower drive
slot. If appropriate,
place a second floppy
drive label next to the
upper drive slot.

Upgrades 1.4 MB Drive Upgrade - 24

Note:

The high density
drive label may read
“FDHD,” “1.4 MB,” or
“SuperDrive.”

8 If necessary, install

system software (6.03
or higher) and run
diagnostics.

9 Fill out the Apple

product return form and
return it to Apple with
the two ROM chips and
the IWM chip.

Upgrades 1.4 MB Drive Upgrade - 25

Note:

Give the customer the
audio extension cable and
explain its use. To reduce
EMI interference, the
customer must install the
audio extension cable with
the ferrite bead between the
audio cable and the audio
jack at the rear of the
computer.

K

Service Source

Additional Procedures

Macintosh SE

Additional Procedures Battery Verification - 1

Battery

Battery

Verification

Before you begin,

• Remove the cover

• Discharge the CRT

• Remove the logic board

±

Warning:

discarded improperly, the
lithium battery in the
Macintosh SE/30 could
explode. Review battery
handling and disposal
instructions in Bulletins/
Safety.

If handled or

Additional Procedures Battery Verification - 2

±

Positive

Probe

Negative

Probe

Warning:

grounding wriststrap until
after discharging the CRT.

1 Set the voltmeter to the

10 volts DC scale.

2 Hold the positive probe

of the voltmeter to the
positive end of the
battery and the negative
probe to the negative
end of the battery.

3 If the battery voltage is

below 2.8 volts, replace
the battery. Refer to
“Battery Replacement”
in this chapter.

Never use a

Additional Procedures Battery Replacement - 3

Battery

Battery

Replacement

Before you begin,

• Remove the cover

• Discharge the CRT

• Remove the logic board

±

Warning:

discarded improperly, the
lithium battery in the
Macintosh SE/30 could
explode. Review battery
handling and disposal
instructions in Bulletins/
Safety.

If handled or

Additional Procedures Battery Replacement - 4

Caution:

grounding wriststrap until
after discharging the CRT.

Never use a

Additional Procedures Battery Replacement - 5

Soldered Battery

1 Using wire clippers, cut

the battery leads at both
ends of the battery. Cut
the leads as close to the
logic board as you can
without touching the
board.

2 Return the battery to

Apple for proper
disposal. For battery
packaging and labeling
information, refer to the
instructions in
Bulletins/Safety.