Macintosh IIcx - Desktop computer APPLE - Free user manual and instructions

Product Type	Desktop Computer
Brand	Apple
Model	Macintosh IIcx
CPU	Motorola 68030 @ 16 MHz
FPU	Optional Motorola 68882
RAM	1 MB (expandable to 8 MB)
Storage	40 MB or 80 MB hard drive; 1.44 MB floppy drive
Display	Built-in 9-inch monochrome CRT, 512x384 pixels
Dimensions (W x D x H)	11.5 x 14.4 x 12.2 inches (29.2 x 36.6 x 31.0 cm)
Weight	Approximately 14 lbs (6.4 kg)
Power Supply	100W internal
Operating System	System 6.0.x or later (up to Mac OS 7.5.5)
Expansion Slots	3 NuBus slots
Connectivity	2 serial ports (RS-232/RS-422), SCSI, ADB, DB-15 video out
Maintenance	Clean external surfaces with soft dry cloth; avoid liquids. Internal cleaning requires professional service.
Safety	Use only with grounded outlet; avoid exposure to moisture. Disconnect power before opening.
Repairability	Modular design; RAM, NuBus cards, and some components user-replaceable. Battery replacement recommended every 5 years.
Spare Parts	Available through vintage Mac specialty shops; common parts include PRAM battery, power supply, hard drive.
General Info	Introduced in 1989 as a compact alternative to Macintosh II; features a small footprint and built-in display.

Frequently Asked Questions - Macintosh IIcx APPLE

How do I upgrade the RAM on a Macintosh IIcx?

The Macintosh IIcx uses 30-pin SIMM modules. To upgrade, remove the top cover, locate the four RAM slots, and install modules in pairs. The maximum is 8 MB (4x2 MB). Ensure modules are of the same speed (typically 100 ns).

What is the PRAM battery and how do I replace it?

The PRAM (Parameter RAM) battery is a 3.6V lithium half-AA cell that keeps settings like time and date. It is located on the logic board. To replace, discharge static, remove the old battery, and install a new one. Replace every 5 years.

Can I connect a modern monitor to the Macintosh IIcx?

The IIcx has a DB-15 video output. With a passive adapter, you can connect a VGA monitor, but resolution will be limited to standard Mac modes (e.g., 512x384). For higher resolutions, use a NuBus video card.

How do I boot from a SCSI device (e.g., external hard drive)?

Ensure the SCSI device has termination and ID set (usually 0 or 6). While starting up, hold the Command+Option+Shift+Delete keys to force boot from SCSI. Alternatively, use the Startup Disk control panel.

What operating systems can run on the Macintosh IIcx?

The IIcx runs System 6.0.x through Mac OS 7.5.5. System 7.1 is a popular stable choice. Mac OS 7.6 and above require more RAM and a 68040 emulator (not officially supported).

How do I clean the internal components of my Macintosh IIcx?

Unplug the computer. Remove the cover. Use compressed air to blow out dust. For stubborn dirt, use a soft brush. Avoid touching the CRT anode cap. Reassemble after cleaning.

What is the maximum hard drive capacity supported?

With the original SCSI controller, the OS supports up to 2 GB partitions. Larger drives may work with third-party drivers but are limited by system software. A common upgrade is a 1 GB SCSI hard drive.

Why does my Macintosh IIcx not turn on?

Check power cord and outlet. If fan does not spin, the power supply may be faulty. If fan spins but no display, check the CRT or video logic. A dead PRAM battery can also cause startup issues.

How do I replace the hard drive in a Macintosh IIcx?

Open the case, remove the mounting bracket, disconnect power and SCSI cables from the old drive. Install the new drive, set SCSI ID (1 for internal), attach cables, bracket. Boot from startup disk to format.

Can I add a network card to the Macintosh IIcx?

Yes, it supports NuBus network cards (e.g., Apple Ethernet NuBus card). Install the card into a free slot, install the appropriate driver (e.g., AppleTalk or TCP/IP stack) and configure in the Network control panel.

USER MANUAL Macintosh IIcx APPLE

Macintosh IIcx/IIci/Quadra 700

Macintosh Ilcx

Macintosh Ilci

Macintosh Quadra 700

Service Source

Basics

Macintosh IIcx/IIci/Quadra 700

Basics Overview - 2

Figure: Macintosh Ilcx, Ilci, and Quadra 700

Overview

This manual includes complete repair procedures for the Macintosh Ilcx, Macintosh Ilci, and Quadra 700, shown at left.

Service Source

Specifications

Macintosh IIcx/IIci/Quadra 700

Specifications Processor - 1

Processor

CPU

Macintosh IIcx

Motorola 68030 microprocessor 15.6672 MHz

Macintosh IIci

Motorola 68030 microprocessor 25 MHz

Quadra 700

Motorola 68040 microprocessor 25 MHz

Addressing

32-bit registers 32-bit address/data bus

Specifications Processor - 2

Coprocessor

Built-in floating-point unit (FPU)

Specifications Memory - 3

Memory

RAM

Macintosh IIcx	1 MB, expandable to 128 MB (120 ns or faster SIMMs)
Macintosh IIci	1 MB, expandable to 128 MB (80 ns or faster SIMMs)
Quadra 700	4 MB, expandable to 8 MB (80 ns, I MB SIMMs) or 20 MB (third-party 4 MB SIMMs)

ROM

Macintosh IIcx 256K

Macintosh IIci 512K

Specifications Memory - 4

Quadra 700

1 MB soldered on logic board; ROM SIMM socket available

Specifications Disk Storage - 5

Disk Storage

Floppy Drive

Internal 1.4 MB floppy drive

Hard Drive

Macintosh IIcx/IIci

Optional internal 40, 80, or 160 MB hard drive

Quadra 700

Internal 80, 160, or 400 MB hard drive

Specifications I/O Interfaces - 6

I/O Interfaces

Floppy Drive One DB-19 serial port for connecting external floppy drives

SCSI One DB-25 external connector

Apple Desktop Bus Two Apple Desktop Bus (ADB) ports

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

Expansion

Macintosh IIcx/IIci Three NuBus slots

Quadra 700 Two NuBus slots and one processor-direct slot

Specifications I/O Interfaces - 7

Sound

Stereo sound jack

Video

Macintosh IIci/Quadra 700

One DB-15 video port for built-in video

Ethernet

Quadra 700

Built-in Ethernet port; AUI-15 connector

Specifications I/O Devices - 8

I/O Devices

Keyboard

Apple Keyboard

Mouse

ADB mouse; DIN-4 connector

Specifications Sound and Video - 9

Sound and Video

Sound Generator

Apple sound chip provides 8-bit stereo sampling at 44.1 kHz Four-voice, wavetable synthesis; capable of driving stereo headphones or other stereo equipment through the sound jack

Video Display

Macintosh IIci/Quadra 700

Supports 640 by 480 pixel screens at up to 256 colors or shades of gray (up to 8 bits per pixel) Supports 640 by 870 pixel screens at up to 16 shades of gray

Specifications Electrical - 10

Electrical

Line Voltage

100-240 VAC, automatically configured

Frequency

50–60 Hz, single phase

Maximum Power

Macintosh IIcx/IIci

90 W (not including monitor power)

Quadra 700

130 W (not including monitor power)

90 W continuous

Specifications Physical - 11

Physical

Dimensions

Height: 5.5 in. (14.0 cm)

Width: 11.9 in. (30.2 cm)

Depth: 14.4 in. (36.5 cm)

Weight

14 lb. (6.4 kg) with internal hard drive

Service Source

Troubleshooting

Macintosh IIcx/IIci/Quadra 700

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

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

1 Check 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.

Clicking, chirping, or thumping

1 Replace power supply.
2 Replace logic board. Retain customer's SIMMs.

Troubleshooting Symptom Charts/System

(Continued)

System (Continued)

System shuts down intermittently

1 Make sure air vents on sides and top of case are unobstructed. Thermal protection circuitry may shut down system. After 30–40 minutes, system should be OK.
2 Replace power cord.
3 Check batteries. Refer to "Battery Verification" in Additional Procedures.
4 Replace power supply.
5 Replace logic board. Retain customer's SIMMs.

System intermittently crashes or locks

1 Make sure system software is correct version.
2 Make sure application software is known-good.
3 Replace SIMMs.
4 Replace logic board. Retain customer's SIMMs.
5 Replace power supply.

Troubleshooting Symptom Charts/Video - 4

Video

Screen is dark, 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 Move video card to different slot.
5 Replace video card.
6 Quadra 700: Replace VRAM SIMMs.
7 Macintosh Ilcx/Ilci: Make sure ROM jumper is on.
8 Replace SIMMs.
9 Replace logic board. Retain customer's SIMMs.
10 Replace power supply.

Troubleshooting Symptom Charts/Video

(Continued)

Video (Continued)

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

1 Replace video cable.
2 Replace monitor. Refer to appropriate monitor manual to troubleshoot defective monitor.
3 Quadra 700: Replace VRAM SIMMs.
4 Macintosh Ilcx/Ilci: Make sure ROM jumper is on.
5 Remove NuBus cards.
6 Remove peripherals.
7 Replace SIMMs.
8 Replace logic board. Retain customer's SIMMs.
9 Replace power supply.

Troubleshooting Symptom Charts/Video

(Continued)

Video (Continued)

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

Screen is completely dark, fan is not running, and LED is not lit

1 Replace monitor. Refer to appropriate monitor manual to troubleshoot defective monitor.
2 Replace video cable.
3 Move video card to different slot.
4 Replace video card.
5 Replace logic board. Retain customer's SIMMs.

1 Plug the monitor directly into a wall socket and verify that the monitor has power.
2 Check battery. Refer to "Battery Verification" in Additional Procedures.
3 Replace power supply.
4 Replace logic board. Retain customer's SIMMs.

Troubleshooting Symptom Charts/Floppy Drive - 7

Floppy Drive

Audio and video present, but internal drive does not operate

1 Replace disk with known-good system disk.
2 Verify that all external SCSI devices are disconnected.
3 Replace internal floppy drive cable.
4 Replace internal floppy drive.
5 Replace logic board. Retain customer's SIMMs.
6 Replace power supply.

Disk ejects; display shows icon with blinking "X"

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

Troubleshooting Symptom Charts/Floppy Drive

(Continued)

Floppy Drive (Continued)

Will not eject disk 1 Switch off computer. Hold mouse button down while you switch computer on.

2 Eject disk manually.
3 Replace floppy drive.

Attempts to eject disk, but doesn't

1 Push disk completely in.
2 Eject disk manually.
3 Replace floppy drive.

Troubleshooting Symptom Charts/Hard Drive - 9

Hard Drive

Internal hard drive runs continuously

1 Replace hard drive data cable.
2 Replace internal hard drive.
3 Replace logic board. Retain customer's SIMMs.

Internal hard drive does not operate

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

Works with internal hard drive or external SCSI device but not with both

1 Verify that SCSI select switch setting on external device is not 7 or same number as internal hard drive.
2 Replace terminator on external device.
3 Verify that internal hard drive has a terminator.

Troubleshooting Symptom Charts/Peripherals - 10

Peripherals

Cursor does not move 1 Reboot system.

2 Check mouse connection.
3 If mouse was connected to keyboard, connect mouse to a computer ADB port instead and disconnect the keyboard. If mouse works, replace the keyboard.
4 If mouse does not work in any ADB port on computer, replace mouse.
5 Replace logic board. Retain customer's SIMMs.

Cursor moves, but clicking the mouse button has no effect

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

Troubleshooting Symptom Charts/Peripherals

(Continued)

Peripherals (Continued)

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

1 Remove duplicate system files on the hard drive.
2 Clear parameter RAM. System 7: Hold down

during startup but before "Welcome to Macintosh" appears. System 6 and earlier: Hold down keys and select Control Panel from Apple menu.
3 If mouse was connected to keyboard, connect the mouse to a computer ADB port, and disconnect the keyboard. If mouse works, replace the keyboard.
4 If mouse does not work in any ADB port on computer, replace mouse.
5 Replace logic board. Retain customer's SIMMs.

Troubleshooting Symptom Charts/Peripherals

(Continued)

Peripherals (Continued)

No response to any key on the keyboard

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

Known-good ImageWriter or Imagewriter II does not print

1 Make sure System is 6.0.4 and Finder is 6.1 (or later).
2 Make sure the Chooser and Control Panel settings are correct.
3 Replace printer interface cable.
4 Replace logic board. Retain customer's SIMMs.

Known-good LaserWriter does not print

1 Make sure System is 6.0.4 and Finder is 6.1 (or later).
2 Make sure the Chooser and Control Panel settings are correct.

Troubleshooting Symptom Charts/Miscellaneous - 13

Miscellaneous

No sound from speaker

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

Clock not running 1 Replace battery. See "Battery Verification" in Additional Procedures.

2 Replace logic board. Retain customer's SIMMs.

Service Source

Take Apart

Macintosh IIcx/IIci/Quadra 700

Take Apart Cover - 1

Cover

No preliminary steps are required before you begin this procedure.

1 Remove the Phillips screw.
2 Pull up on the tabs and lift the cover until it comes off the front end.

Take Apart Speaker Bracket and Speaker - 2

Speaker Bracket and Speaker

Before you begin, remove the cover.

Caution: Review the ESD precautions in Bulletins/Safety.

Note: The speaker and speaker bracket are two separate, replaceable units. To remove the speaker, you must first remove the speaker bracket.

Take Apart Speaker Bracket and Speaker - 3

1 Disconnect the speaker connector from the logic board.

2 Gently lift the release latch and pull back on the bracket until it comes free from the case.

Take Apart Speaker Bracket and Speaker - 4

3 Caution: Do not push on the heavy paper part of the speaker.

Gently push the speaker from the bracket.

Take Apart Power Supply - 5

Power Supply

Before you begin, remove the cover.

Caution: Review the ESD precautions in Bulletins/Safety.

Take Apart Power Supply - 6

Note: Use some force in lifting the power supply. If the power supply does not move, verify that the latch is released.

Release the latch and lift the power supply from the computer.

Replacement Note: Make sure the lips of the power supply align with the slots in the case. Slide the power supply down until you hear a click.

Take Apart Fan Bracket and Fan - 7

Fan Bracket and Fan

Before you begin, remove the following:

• Cover
• Power supply

Caution: Review the ESD precautions in Bulletins/Safety.

Note: The fan and fan bracket are two separate, replaceable units. To remove the fan, you must first remove the fan bracket.

Take Apart Fan Bracket and Fan - 8

1 Gently squeeze together the two bracket latches and release them from the metal tabs.

2 Push up on the latches until you can access the fan power cable connector.

3 Disconnect the cable from the power supply and pull the fan bracket from the case.

Take Apart Fan Bracket and Fan - 9

4 Release the two latches and push the fan from the bracket.

Replacement Note: Push the fan wire into the power supply case far enough to prevent the fan blades from striking the wire.

Take Apart Hard Drive - 10

Hard Drive

Before you begin, remove the following:

• Cover
• Power supply

Caution: Review the ESD precautions in Bulletins/Safety.

Take Apart Hard Drive - 11

Note: The hard drive is located on the top of the drive mount. You can remove the hard drive with or without removing the mount. The following procedure describes how to remove the hard drive without removing the mount. (The procedure for removing the mount is in "Floppy Drive and Mount.")

Take Apart Hard Drive - 12

1 Disconnect the hard drive data cable and hard drive power cable from the hard drive.

Take Apart Hard Drive - 13

2 Lift the LED holder on the front of the case and pull out the LED.

Take Apart Hard Drive - 14

3 Squeeze the two tabs and gently pull up.

4 Remove the hard drive along with its carrier.

Replacement Note: For 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.

Take Apart Floppy Drive and Mount - 15

Floppy Drive and Mount

Before you begin, remove the following:

• Cover
• Power supply

Caution: Review the ESD precautions in Bulletins/Safety.

Note: To remove the floppy drive, you must remove the drive mount.

Take Apart Floppy Drive and Mount - 16

1 Lift the LED holder on the front of the case and pull out the LED.

Take Apart Floppy Drive and Mount - 17

2 Remove the screw from the drive mount.

3 Pull up on the paper tab and disconnect the hard drive data cable from the logic board.

Take Apart Floppy Drive and Mount - 18

4 Disconnect the floppy drive cable and hard drive power cable from the logic board.

Take Apart Floppy Drive and Mount - 19

5 Release the latch and pull the mount toward the rear of the case about 1/2 inch.

6 Lift the mount from the case.

Take Apart Floppy Drive and Mount - 20

7 Turn over the mount and gently push down the drive latch.

8 Slide the floppy drive toward the front of the mount about 1 inch and pull the drive out of the mount.

Take Apart Floppy Drive and Mount - 21

Replacement Note: Apple recommends using dust shields on 1.4 MB SuperDrives. 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.

Take Apart Logic Board - 22

Logic Board

Before you begin, remove the following:

• Cover
• Expansion cards
• Power supply
• Drive mount
• Reset/interrupt switch
• Speaker bracket

Caution: Review the ESD precautions in Bulletins/Safety.

Take Apart Logic Board - 23

1 Slide the logic board toward the front of the case until the board stops.
2 Gently lift the front end of the logic board and remove the board from the case.

Replacement Note: Before you replace the logic board, make sure the metal grounding tabs that surround the port holes on the rear of the case are not folded in front of the holes.

Take Apart Logic Board - 24

Replacement Note: Remove the SIMMs from the defective logic board and install them on the replacement logic board.

Service Source

Upgrades

Macintosh IIcx/IIci/Quadra 700

Upgrades Macintosh Ilci Upgrade - 1

Macintosh IIci Upgrade

Before you begin, remove the following:

• Cover
• Expansion cards
• Power supply
• Drive mount
• Reset/interrupt switch
• Speaker bracket
• Logic board

Note: The Macintosh Ilci Upgrade Kit for the Macintosh Ilcx includes a Ilci logic board, 1 MB of

Upgrades Macintosh Ilci Upgrade - 2

80 ns fast page mode DRAM SIMMs, a new bottom case, and a new hard drive power cable.

Caution: Review the ESD precautions in Bulletins/Safety.

Upgrades Macintosh Ilci Upgrade - 3

1 Using the SIMM removal tool, remove the DRAM SIMMs from the old logic board and, if they are 120 ns SIMMS, give them to the customer.

2 Discard the bottom case. (You need not return it to Apple.)

Upgrades Macintosh Ilci Upgrade - 4

3 Insert the new Macintosh Ilci logic board into the new bottom case.

Replacement Caution: Be sure to insert the replacement DRAM SIMMs (or other 80 ns SIMMs) into the Macintosh Ilci logic board. If you use the 120 ns SIMMs from the Macintosh Ilcx, the new Macintosh Ilci will not function correctly.

Replacement Note: To finish the Macintosh Ilci upgrade, install the speaker, drives, drive mount (using

Upgrades Macintosh Ilci Upgrade - 5

the new hard drive power cable), power supply, and reset/interrupt switch. (Refer to Take Apart for detailed procedures.) If the unit contains a hard drive, install the hard drive light pipe from the old case in the new Macintosh Ilci bottom case.

Upgrades Quadra 700 Upgrade - 6

Quadra 700 Upgrade

Before you begin, remove the following:

• Cover
• Expansion cards
• Power supply
• Drive mount
• Reset/interrupt switch
• Speaker bracket
• Logic board

Note: The Macintosh Quadra 700 Upgrade Kit includes a Quadra 700 logic board, a new bottom case, and a new hard drive power cable.

Upgrades Quadra 700 Upgrade - 7

Caution: Review the ESD precautions in Bulletins/Safety.

Upgrades Quadra 700 Upgrade - 8

1 Using the SIMM removal tool, remove the DRAM SIMMs from the old logic board and, if they are 120 ns SIMMS, give them to the customer.

2 Discard the bottom case. (You need not return it to Apple.)

Upgrades Quadra 700 Upgrade - 9

3 Insert the new Quadra 700 logic board into the new bottom case.

Replacement Caution: Be sure to insert the replacement DRAM SIMMs (or other 80 ns SIMMs) into the Quadra 700 logic board. If you use 120 ns SIMMs, the new Quadra 700 will not function correctly.

Replacement Note: To finish the Quadra 700 upgrade, install the DRAM SIMMs, speaker, drives, drive mount (using the new

Upgrades Quadra 700 Upgrade - 10

hard drive power cable), power supply, and reset/interrupt switch. (Refer to Take Apart for detailed procedures.)

Upgrades Expansion Cards - 11

Expansion Cards

Before you begin, remove the cover.

Caution: Review the ESD precautions in Bulletins/Safety.

Caution: Pull up evenly on both sides of the card to avoid bending the connector pins.

Carefully grasp each end of the card and pull straight up to remove it.

Upgrades Expansion Cards - 12

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 Power Macintosh Upgrade Card - 13

Power Macintosh Upgrade Card

By installing this card in the Macintosh Quadra 700 Processor-Direct Slot (PDS), you can upgrade the Quadra 700 to a PowerPC microprocessor.

For more information, including installation instructions, refer to Basics in the Power Macintosh Upgrade Card manual.

Service Source

Additional Procedures

Macintosh IIcx/IIci/Quadra 700

Additional Procedures Battery Verification - 1

Battery Verification

Before you begin, remove the following:

• Cover
• Power supply
• Drive mount

⚠ Warning: Review battery handling and disposal instructions in Bulletins/Safety.

Caution: Review ESD precautions in Bulletins/Safety.

Additional Procedures Battery Verification - 2

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 (marked “+” on the logic board) 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.

Additional Procedures Battery Replacement - 3

Battery Replacement

Before you begin, remove the following:

• Cover
• Power supply
• Drive mount

⚠ Warning: Review battery handling and disposal instructions in Bulletins/Safety.

Caution: Review ESD precautions in Bulletins/Safety.

Additional Procedures Battery Replacement - 4

1 Using a small flat-blade screwdriver, pry open the latch at the end of the holder and lift off the cover.

Additional Procedures Battery Replacement - 5

2 Grasp the battery and remove it from the holder.

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

Additional Procedures Reset/Interrupt Switch - 6

Reset/Interrupt Switch

Before you begin, remove the cover.

Caution: Review ESD precautions in Bulletins/Safety.

Additional Procedures Reset/Interrupt Switch - 7

1 With one finger, lift the center tab of the switch.

2 Gently lift the rear of the switch up and away from the front of the case.

Additional Procedures SCSI Termination - 8

SCSI Termination

No preliminary steps are required before you begin this procedure.

The SCSI termination block provides proper termination for systems without an internal hard drive. All Macintosh Quadra 700 computers that shipped without internal hard drives have the termination block attached to the logic board SCSI connector. After you install an internal hard drive, remove the block.

Service Source

Exploded View

Macintosh IIcx/IIci/Quadra 700

Exploded View

Macintosh Ilcx/Ilci and Quadra 700