2-Take-Apart

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" Apple Technical Procedures

Macintosh 1I/IIxlllfx

1.3 Product Description 1.3 Features

1.5 Configurations

1.6 Options and Upgrades 1.7 Module Identification

1.9 Connector and Switch Identification 1.12 Theory of Operation 1.30 Functional Overview 1.32 System Software

1.32 System Software 6.0.2 1.33 System Software 6.0.5 1.34 Other Information

1.34 High-DenSity Media 1.36 Programmer's Switch

1.37 Materials Required to Service the Macintosh

Section

Introduction to MacTest II/IIx Copying Mactest II/IIx Disk Using Your Backup Disk Running MacTest U/IIx

Materials Required Starting MacTest II/IIx Installing the Loopbacks

Using the MacTest II/IIx Menus Running the Tests

Diagnostic Sound Sampler Introduction

Materials Required Procedure

Introduction to AppleCAT II/IIx Running AppleCAT II/IIx

Materials Required

Setting Up Test Station and UUT Establishing Communication Using the AppleCAT II/IIx Menus Running the Tests

Repair Confirmation Code CRCC) SCSI Loopback Jumper Procedure

To Determine If a Jumper Is Needed To Install the Jumper

Introduction

Before You Start

How to Use the Symptom Chart

How to Use the Troubleshooting Flowcharts Things to Remember

Module Exchange Information Logic Board 4.15 Peripheral Problems

4.17 Miscellaneous Problems 4.19 Troubleshooting Flowcharts

rev. Nov 91 Macintosh II/lIxlllfx

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Verification Flowchart Notes Battery Verification

Introduction

Materials Required Verification Procedure Customer's Configuration Chart

Batteries

Introduction Overview

Battery Holder Board Installation Battery Replacement

Logic Board RAM Identification and Upgrades Introduction

Identification Upgrades

Logic Board Upgrades

Macintosh IIx Logic Board Upgrade Macintosh IIfx Logic Board Upgrade Macintosh II

Paged Memory Management Unit Upgrade FDHD SuperDrive Upgrade

Macintosh IIfx 5.18 SCSI Termination

IPL.3

Macintosh II/IIx/IIfx - System Exploded View (Figure 1)

©Apple Computer. Inc. 1990 and 1991. No portion of this document may be reproduced in any form without the written permission of Apple Computer, Inc.

Apple, the Apple logo, AppleCAT, AppleTalk, A!UX, EtherTalk, HyperCard, ImageWriter, LaserWriter, and Macintosh are registered trademarks of Apple Computer, Inc.

Apple Desktop Bus, AppleColor, FDHD, Finder, MacTest, QuickDraw, and SuperDrive are trademarks of Apple Computer, Inc.

Motorola is a registered trademark of Motorola Corporation. Ethernet is a trademark of Xerox Corporation. Sony is a trademark of Sony Corporation. NuBus is a trademark of Texas

Instruments. UNIX is a registered trademark of UNIX Systems Laboratories. MS-DOS and Microsoft are registered trademarks of Microsoft Corporation.

iv I Contents rev. Nov 91 Macintosh 1I/IIxlllfx

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) " Apple Technical Procedures

Macintosh 1I/IIxlllfx

Section 1 - Basics

o ^CONTENTS

1.3 Product Description

1.3 Features

1.5 Configurations

1.6 Options and Upgrades 1.7 Module Identification

1.9 Connector and Switch Identification 1.12 Theory of Operation

1.12 Introduction

1.12 Macintosh II and IIx Logic Boards 1.21 Macintosh IIfx Logic Board

1.29 Power Supply 1.29 Floppy Disk Drives 1.29 SCSI Hard Disk Drives

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^1.30 Functional Overview

1.32 System Software

1.32 System Software 6.0.2 1.33 System Software 6.0.5 1.34 Other Information

1.34 High-Density Media 1.36 Programmer's Switch

1.37 Materials Required to Service the Macintosh II/IIx/IIfx

1.38 Specifications

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Macintosh IIlIIxlllfx Mar 90 Basics / 1.1

Soft Power Switch

Stereo Audio

1.2 I Basics

Apple Desktop

Bus Interfaces

Internal Speaker

Floppy Drives

Figure 1-1

rev. Aug 90

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Floppy Interface

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120 to 240 Volt

Macintosh II/lIxlllfx

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open-architecture Macintosh computers. As the high-end computers of the Macintosh line, they were

designed to run existing software while providing the power, flexibility, and expandability necessary for future applications.

Figure 1-1. Features are divided into two categories-those common to the Macintosh II, IIx, and IIfx and features specific to each model. Features common to each computer include:

• Two RS-422 serial interfaces

• SCSI interface with internal and external connectors

• Floppy interface supporting a maximum of two drives

• Stereo audio with internal speaker and a connector for attaching external speakers

• Two Apple Desktop Bus™ interfaces

• Battery backed-up real time clock chip

• Random-access memory packaged as single in-line memory modules (SIMMs)

• Floating-point math coprocessor

• Supports a maximum of two floppy drives and one

• Motorola ® Mc68020 microprocessor operating at 16 MHz

• Motorola Mc68881 math coprocessor

• Address management unit (AMU)

• Optional paged memory management unit (PMMU) to support multitasking operating systems such as Apple A/UX®

Macintosh /Ix The Macintosh IIx has these additional features:

•

Motorola Mc68882 math coprocessor

•

4 megabytes of 100-nsec RAM, expandable to

Macintosh IIfx The Macintosh IIfx has these additional features:

•

Motorola Mc68030 microprocessor operating at 40 MHz

•

Mc68030 has on-chip paged memory management unit (PMMU) and a 256-byte data and instruction cache

•

Motorola Mc68882 math coprocessor

II ^•

4 MB of 80-nsec RAM, expandable to 8 MB

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•

Two 1.4 MB SuperDrive floppy disk drives

•

120-pin processor-direct slot for high-speed interfacing to the microprocessor

•

SCSI interface supports direct memory access (DMA)

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Configurations Macintosh II

Macintosh /Ix

Macintosh IIfx

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Macintosh II/lIxlllfx

The Macintosh II, IIx, and IIfx are available from Apple in various configurations. These configurations are described below.

• Single BOOK 3.5-inch floppy disk drive

• Single BOOK 3.5-inch floppy disk drive and 40 MB hard disk

• Single FDHD SuperDrive

• Single FDHD SuperDrive and 80 MB hard disk

• Dual FDHD SuperDrives

• Dual FDHD SuperDrives and 80 MB hard disk

• Dual FDHD SuperDrives and 160 MB hard disk

• Dual FDHD SuperDrives and 80 MB hard disk with Apple A/UX

• Dual FDHD SuperDrives, 80 MB hard disk, and parity memory

These are not the only possible configurations. Apple offers a number of options to enhance the operation and performance of these systems. These options are

described later in this section. Also, third-party manufacturers offer a wide variety of products which can be installed. You may see systems with different amounts of RAM, different sizes and capacities of hard disk drives, NuBus cards, and external peripherals.

Mar 90 Basics 11.5

Options and

To maintain system functionality, A/UX customers planning to use the Macintosh IIx or IIfx and/or Apple SuperDrive must upgrade A/UX software to version 1.0.1.

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Module Identification

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Macintosh 1I/11x1l1fx

An exploded view of the system unit with field

serviceable modules is shown in Figure 1-2. Additional module identification is available in the Apple Seroice

Technical Procedures Module Identification manual.

Information in the Module Identification manual supersedes the information available in this manual.

Figure 1-2

Mar 90

SCSI Hard Disk (optional)

Floppy Disk Drive

Power Supply

Logic Board

Basics / 1.7

FDHD and BOOK Drive Identification

SOOK Drive

1.81 Basics

Figure 1-3. The FDHD disk drive cannot be

distinguished from the 800K format disk drive without first removing the computer's cover (see Section 2, Take-Apart). With the cover removed, locate the microswitches at the front of the drive. The FDHD has three microswitches; the 800K drive has only two microswitches.

1.4 MB Drive

Figure 1-3

Figure 1-4. You can also identify a FDHD drive by checking the manufacturer's label on the bottom of the drive; 2MB has been added to the label on all high-density drives.

SONY® ^2MB

MODEL MP-FXXX-XXG

Made in Japan 4-873-458-01

Figure 1-4

Mar 90 Macintosh II/lIxlllfx

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Connector and Switch Identification

Macintosh IIlIIxlllfx

Figure 1-5. The Macintosh II, IIx, and IIfx have six interface connectors, two power connectors, six NuBus card openings, and a power switch on their rear panels.

The programmer's switch is located at the right rear of the computer. Pin-outs and signal descriptions for the interface connectors can be found in the Apple Seroice Technical Procedures Peripheral Interface Guide.

II/1II1///1 \\\\a.

\\\\\ \[[ oooorn

Power Connectors NuBus Card Openings

Figure 1-5

Figure 1-6. The Macintosh IIfx has six NuBus slots, a 120-pin processor-direct slot; one ROM and eight DRAM SIMM sockets; and connectors for power, two floppy drives, the internal speaker, the SCSI hard disk signal, and the SCSI hard disk power cable.

The Macintosh II and IIx have the same connectors with two exceptions: The Macintosh II does not have a ROM SIMM socket, and neither the Macintosh II or IIx have the 120-pin processor-direct slot.

Mar90 Basics /1.9

1 .1 0 / Basics

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Macintosh IIIIIX/llfx

Two other items concerning the internal connectors should be noted:

• The SCSI hard disk power connector on the

Macintosh IIfx is a 2-pin x 2-pin square connector, while the Macintosh II and IIx use a 4-pin x 1-pin rectangular connector. Be sure you have the correct cable when exchanging SCSI hard disks.

• While the Macintosh IIfx PDS connector is

physically the same as the cache memory card slot in the Macintosh IIci, these slots are electrically different and cards designed for one computer cannot be used in the other.

CAUTION: If a Macintosh IIci cache card is installed in the Macintosh IItx expansion slot, or vice-versa, damage to the card and logic board are likely_

MargO Basics / 1 .11

o THEORY OF OPERATION

together with differences noted where appropriate.

The Macintosh IIfx logic board is different and is described separately. The power supplies and floppy disk drives used in all three computers are the same and are described after the logic boards.

The information here will give you an understanding of how each module of the computer works, as well as how the system functions. This will assist you in performing logical troubleshooting of the Macintosh II, IIx, and IIfx computers.

Mar 90 Macintosh 1I/IIxlllfx

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DO

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Interface

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Macintosh II/lIxlllfx

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DO

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DO DO

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Apple Sound Chip

Macintosh II and IIx

Figure 1-8

MargO

Interrupt Switch Reset Switch

DRAM SIMMs

HMMU orPMMU (Mac II only)

Sony Sound Chip MC68020 (Mac II)

or MC68030 (Mac IIx)

Basics I 1.13

Im Dokument Apple Service (Seite 184-200)