Macintosh Performa 5400 General Maintenance: Difference between revisions

Line 41:

'''3.0 V is Apple's published threshold for this machine.''' Apple gives no replacement

interval~~; the~~ "every ~~3–5~~ years" ~~figure that stood here had no source and has been removed~~.

interval at all, so a fixed "every three to five years" is somebody's guess rather than a

Replace on measurement, or when the machine starts losing its date and startup-disk setting.

specification. Replace on measurement, or when the machine starts losing its date and

startup-disk setting.

=== Cleaning Battery Leakage ===

Line 147:

Line 148:

* '''Power:''' 220 W maximum for all line and load conditions

'''The rail table ~~that used to stand here has been removed.''' It gave~~ "+5 V 4.85–5.15 V,

'''The rail table "+5 V 4.85–5.15 V, +12 V 11.9–12.7 V, +3.3 V 3.2–3.4 V" does not belong to

+12 V 11.9–12.7 V, +3.3 V 3.2–3.4 V". The first two lines are Apple's '''Macintosh Plus'''

this machine.''' The first two lines are Apple's '''Macintosh Plus''' adjustment procedure —

adjustment procedure — genuine there, with test cable 077-0135 and an upper bound of

genuine there, with test cable 077-0135 and an upper bound of 12.75 V — transplanted onto

12.75 V — transplanted onto ~~a machine~~ that ~~has~~ no such procedure. ~~The third~~ line ~~had no~~

machines that have no such procedure. No source of any kind has been found for the +3.3 V

~~source at all~~. Apple publishes no per-rail tolerance and no power-supply adjustment for the

line. Apple publishes no per-rail tolerance and no power-supply adjustment for the 5400; the

5400; the 29.5 V high-voltage adjustment above is the only one it documents.

29.5 V high-voltage adjustment above is the only one it documents.

== References ==

@@ Line 41: / Line 41: @@
 '''3.0 V is Apple's published threshold for this machine.''' Apple gives no replacement
-interval; the "every 3–5 years" figure that stood here had no source and has been removed.
+interval at all, so a fixed "every three to five years" is somebody's guess rather than a
-Replace on measurement, or when the machine starts losing its date and startup-disk setting.
+specification. Replace on measurement, or when the machine starts losing its date and
+startup-disk setting.
 === Cleaning Battery Leakage ===
@@ Line 147: / Line 148: @@
 * '''Power:''' 220 W maximum for all line and load conditions
-'''The rail table that used to stand here has been removed.''' It gave "+5 V 4.85–5.15 V,
+'''The rail table "+5 V 4.85–5.15 V, +12 V 11.9–12.7 V, +3.3 V 3.2–3.4 V" does not belong to
-+12 V 11.9–12.7 V, +3.3 V 3.2–3.4 V". The first two lines are Apple's '''Macintosh Plus'''
+this machine.''' The first two lines are Apple's '''Macintosh Plus''' adjustment procedure —
-adjustment procedure — genuine there, with test cable 077-0135 and an upper bound of
+genuine there, with test cable 077-0135 and an upper bound of 12.75 V — transplanted onto
-.75 V — transplanted onto a machine that has no such procedure. The third line had no
+machines that have no such procedure. No source of any kind has been found for the +3.3 V
-source at all. Apple publishes no per-rail tolerance and no power-supply adjustment for the
+line. Apple publishes no per-rail tolerance and no power-supply adjustment for the 5400; the
-; the 29.5 V high-voltage adjustment above is the only one it documents.
+.5 V high-voltage adjustment above is the only one it documents.
 == References ==

Macintosh Performa 5400 General Maintenance: Difference between revisions

Josh (talk | contribs)