Macintosh II Repair and Upgrade Secrets
Macintosh II Repair and Upgrade Secrets is a 1991 book by Larry Pina, published by Brady Publishing, a division of Simon & Schuster, New York (ISBN 0-13-929530-5).[1] The Library of Congress record gives xx, 264 pages.[2] The scan here is 283 PDF pages; the book's Color TPG test-pattern program disk is not included. It is Pina's companion to Macintosh Repair & Upgrade Secrets, which covers the compact Macs. It is a secondary source.
The book covers the Macintosh II, IIx, IIfx, IIcx, IIci and IIsi, with take-apart procedures for each case style, upgrades (logic board, video RAM, memory, coprocessor, NuBus cards, floppy and hard drives), adjustment of Apple's High-Resolution monochrome and AppleColor RGB monitors, and ADB keyboard and mouse repair.[3]
Contents
[edit | edit source]Page numbers as printed in the contents.[3]
| Chapter | Title | Page |
|---|---|---|
| Introduction: Color Test Pattern Generator (Color TPG) | xiii | |
| 1 | Safety Rules: Tools and Techniques | 1 |
| 2 | Adjustments: Apple High-Resolution Monochrome Monitors | 17 |
| 3 | Adjustments: AppleColor High-Resolution RGB Monitors | 35 |
| 4 | CPU Maintenance: Logic Board Upgrades | 85 |
| 5 | VRAM: Video Card Upgrades | 121 |
| 6 | DRAM: Memory and Coprocessor Upgrades | 153 |
| 7 | NuBus Expansion Card Upgrades | 173 |
| 8 | FDHD: Disk Drive Upgrades | 189 |
| 9 | SCSI Hard Drive Upgrades | 205 |
| 10 | ADB: Keyboard and Mouse Repairs | 227 |
| A | Acronym Glossary | 245 |
| B | Dealer/Manufacturer Addresses | 249 |
| Index | 257 |
What it settles
[edit | edit source]Chapter 4 has Pina's component-level notes for the II, IIx and IIfx logic board (pp. 102-109):[4]
- A machine that will not start from the keyboard or the rear switch most likely has a flat B2, one of the two lithium cells. On the original Macintosh II (and early IIx boards) the cells are 3 V Varta units soldered to the board; later boards use 3.6 V Tadiran TL-5112 cells in snap-in holders. Good cells read 3.2-3.85 V, weak 2.3-3.1 V, and below 2.3 V a cell is dead. B1 powers the clock and PRAM; change both cells together.
- In an emergency the machine can be started by touching a 3 V source (two AA cells) to pin 15 of the power supply connector.
- The power supply, part 699-0389, was made by Astec or Sony and is rated 156 W peak. Table 4-3 gives the connector pinout and the voltages Pina measured: +12 V 11.50-12.80 V, +5 V 4.90-5.20 V, −12 V −13.40 to −10.80 V, pin 15 /PFW.
- On the original Macintosh II, fuse F1 (1 A, next to the internal hard drive connectors) blows and stops external SCSI devices working; fuse F2 (1 A, behind the ADB connectors) does the same for ADB.
Apple's own figures for these machines are in the Macintosh II/IIx/IIfx Service Source and the Macintosh IIcx/IIci/ Quadra 700 Service Source; Apple's battery threshold for the II family is 3.2 V (IIcx and IIci: 2.8 V).
What it does not contain
[edit | edit source]No schematics and no component-level parts lists for the logic boards or power supplies. Beyond the battery, fuse and power-supply checks above, Pina refers board faults to repair services (p. 109).[4]
Pages that cite this document
[edit | edit source]- Macintosh II, Macintosh II/IIx/IIfx Service Source
- Macintosh HDD Maintenance, Macintosh Floppy Drive Maintenance, Hard Drive Maintenance and Repair, Apple SuperDrive
- Macintosh Repair & Upgrade Secrets, The Dead Mac Scrolls, Macintosh Repair Resources
Download: Macintosh_II_Repair_and_Upgrade_Secrets_1991.pdf (44.9 MB)
References
[edit | edit source]- ↑ Title and copyright pages of the scan (PDF pp. 2-3): copyright 1991 Larry Pina; Brady Publishing; ISBN 0-13-929530-5; CIP 91-37576, call number TK7889.M33P55 1991.
- ↑ Macintosh II repair and upgrade secrets (OL1556913M), Open Library, from Library of Congress MARC data—link(accessed 2026-09-30)
- ↑ 3.0 3.1 Contents, pp. v-xii (PDF pp. 6-13).
- ↑ 4.0 4.1 Chapter 4, pp. 102-109 (PDF pp. 122-129).