Editing Macintosh Repair & Upgrade Secrets

The '''Macintosh Repair & Upgrade Secrets''' held here is Larry Pina's book, published under the
'''Hayden Books''' imprint of Macmillan Computer Publishing, '''first edition, second printing,
1990''', ISBN 0-672-48452-8, Library of Congress card number 89-63715. The scan is
'''365 pages'''.

'''This is the most component-level Apple-family document on this wiki.''' Unlike Apple's own
''Service Source'' volumes, which stop at module level, this book prints '''four complete
component parts lists for compact Macintosh analogue boards''', with values, working voltages,
working temperatures, package types and the original manufacturer for every position.

== The four parts lists ==
* '''Appendix C &mdash; Parts List, Macintosh Analog Board, U.S. Version''' (book p. 327)
* '''Appendix D &mdash; Parts List, Macintosh Analog Board, International Version''' (book p. 335)
* '''Appendix E &mdash; Parts List, Macintosh SE Analog Board''' (book p. 341)
* '''Appendix F &mdash; Parts List, Macintosh SE CRT Socket Board''' (book p. 345)

Each list is broken into CAPACITORS, INDUCTORS, RESISTORS, SEMICONDUCTORS and MISCELLANEOUS.
The capacitor columns are '''Ref. / Cap. / WV / WTemp. / Type / OEM''', and rows marked "ok" give
Pina's acceptable substitutes. The semiconductor tables cross-reference the OEM part to a
Philips&nbsp;ECG number and, where one exists, a Radio Shack number.

== The finding that matters most: the U.S. and International boards are not the same board ==
The two analogue boards use '''the same designators for different components'''. Reading a value
across from one list to the other will put the wrong part in the board. Verified against the
printed pages:

<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table"
|-
! Ref. !! U.S. board (Appendix C) !! International board (Appendix D)
|-
| C13 || 33&nbsp;&micro;F 16&nbsp;V 85&nbsp;&deg;C aluminium electrolytic || '''0.01&nbsp;&micro;F 1.5&nbsp;kV ceramic disc'''
|-
| C25 || 1000&nbsp;&micro;F 16&nbsp;V 105&nbsp;&deg;C electrolytic || '''0.022&nbsp;&micro;F 400&nbsp;V metallised film'''
|-
| C34 || 330&nbsp;pF 1&nbsp;kV ceramic disc || '''100&nbsp;&micro;F 200&nbsp;V 85&nbsp;&deg;C electrolytic'''
|-
| C42 || 0.1&nbsp;&micro;F metallised film || '''470&nbsp;&micro;F 10&nbsp;V 85&nbsp;&deg;C electrolytic'''
|}

A compact-Macintosh capacitor table that does not say '''which regional analogue board it is
for''' is unusable, and one that mixes the two is dangerous &mdash; C13 alone is the difference
between a 16&nbsp;V electrolytic and a 1.5&nbsp;kV ceramic.

Both boards carry '''RIFA''' "molded minibox" suppression capacitors: on the U.S. board C33 and
C37 (4700&nbsp;pF 250&nbsp;V) and C38 (0.1&nbsp;&micro;F 250&nbsp;V); on the International board
C33 and C36 (4700&nbsp;pF 250&nbsp;V) and C37 (0.47&nbsp;&micro;F 250&nbsp;V). These are the parts
that crack, smoke and smell of fish.

Both boards also carry large mains-side electrolytics at '''100&nbsp;&micro;F 200&nbsp;V''' (U.S.
C35/C36; International C34/C35/C38/C39). A part rated below that is the wrong part.

== Designators differ by region in the text too ==
The chapter headings themselves record the shift: '''"Testing Q3 (INTERNATIONAL Q2)
Out-of-Circuit"''' and '''"Replacing Q3 (INTERNATIONAL Q2)"''' (book pp. 100&ndash;101), and
elsewhere Q11 on the U.S. board is Q10 on the International board. Pina warns explicitly:
"Be sure to look in the right appendix! Appendix C is for U.S. analog boards. Appendix D is for
International analog boards."

== Contents ==
* 1 &mdash; Safety Rules, Tools and Techniques (p. 1)
* 2 &mdash; Preliminary Checks (p. 19)
* 3 &mdash; Adjustments (p. 41)
* 4 &mdash; '''Power Supply Problems''' (p. 55) &mdash; including fluctuating voltage, the harness,
  cleaning and treating board connectors, focus control problems (burned resistors &rarr; no focus),
  loose or corroded contacts on the CRT socket cable, tarnish on the CRT pins, brightness control
* 5 &mdash; '''Video Problems''' (p. 81) &mdash; display collapses to a vertical line (cracked solder
  joints, '''C1 failure'''), jitters/ringing/ozone smell/"worms" in the display, identifying and
  replacing the flyback transformer, severe distortion, burning smell, no raster, collapse to a
  horizontal line, collapse to a pinprick
* 6 &mdash; Dead Sets (p. 109) &mdash; visual inspection, checking resistor values, reading the colour code
* 7 &mdash; Power Supply Upgrades and Fans (p. 125), with a "Parts List for Maximum Analog Board
  Upgrade" giving ''Ref. / Check for / Change to''
* 8 &mdash; Audio Upgrades (p. 145)
* 9 &mdash; Video Upgrades (p. 159)
* 10 &mdash; Disk Drive, RAM, ROM and SCSI Upgrades (p. 175)
* 11 &mdash; Keyboard Repairs (p. 207)
* 12 &mdash; Mouse Repairs (p. 223)
* 13 &mdash; '''Lisa/Macintosh XL Repair Secrets''' (p. 235)
* 14 &mdash; '''Macintosh SE Repair Secrets''' (p. 281)
* Appendix A Glossary (p. 313), B Dealer/Manufacturer Addresses (p. 323), C&ndash;F the four parts lists

== What it does not cover ==
* '''No schematic.''' The parts lists give values and board references, not circuit topology.
* Nothing later than the Macintosh SE. There is no Macintosh II, no LC, no Classic and no
  Colour Classic here; for the Mac II see [[Macintosh II Repair and Upgrade Secrets]].
* No coverage of logic-board faults beyond swap-level.
* It is a '''secondary source''', not Apple's. The values are Pina's own survey of the boards he
  had; where Apple published a figure, cite Apple. Apple published no such figures for these boards.

== What it settles ==
* The Macintosh PRAM cell is genuinely '''4.5&nbsp;V''': Appendix D's MISCELLANEOUS table lists
  '''B1, Eveready 523, 4.5&nbsp;V battery'''. That matches the ''Service Source'' specification and
  confirms the cell is alkaline, so leakage is neutralised with vinegar rather than bicarbonate.
* The compact Macintosh CRT in the SE is a '''Samsung type 10ATY4N white antiglare''' tube
  (Appendix E, MISCELLANEOUS).
* Component-level data for these boards '''does''' exist, contrary to what the module-level Apple
  manuals imply. It is here, and it has never been cited from the wiki's compact-Mac pages.

== Pages that cite this document ==
* [[Macintosh 128K/512K Capacitor Replacement Guide]] &mdash; the U.S./International split and the four parts lists
* [[Macintosh SE Capacitor Replacement Guide]] &mdash; Appendices E and F
* [[Macintosh Plus Capacitor Replacement Guide]]
* [[The Dead Mac Scrolls]] &mdash; the same author's symptom-to-part reference
* [[Macintosh II Repair and Upgrade Secrets]] &mdash; the companion volume for the Mac II

''Working on a compact Macintosh analogue board means working on a live mains supply and a charged
CRT. Follow [[CRT Discharge Procedure]] first.''

<pdf> File:Macintosh_Repair_&_Upgrade_Secrets.pdf </pdf>

Download: [[:File:Macintosh_Repair_&_Upgrade_Secrets.pdf|Macintosh_Repair_&_Upgrade_Secrets.pdf]] (63.2 MB)

[[Category:Apple Documentation]]