Anyone have a M8340 (EAE) schematic rev.D? Or M8341 rev.D sch?

Kyle Owen kylevowen at
Thu Mar 5 08:33:39 CST 2015

On Wed, Mar 4, 2015 at 5:37 PM, Eric Smith <spacewar at> wrote:
> Note that the schematic revision (CS) and the corresponding etch
> revision often do not match. A particular etch can have different
> levels of ECO corresponding to different schematic revisions, and a
> particular schematic revision might correspond to both an older etch
> with ECOs and a newer etc without ECOs (or with fewer ECOs). The
> schematic revision is supposed to be stamped on the board or handle,
> and updated if ECOs are applied in the field, but they're not always
> marked correctly.

Oddly enough, the M8340 has "F" marked on one of the handles. This board
still has a 74H40 and two 380s not present in the Rev. F schematic. You can
still make out where the handles used to say "137 D"; they're very faint.
I'm not sure what the hot stamp "F" means, because it sure doesn't
correspond to Rev. F in the schematic.

The M8341 has  "234 D" on both handles, and that matches the etch revision.
No ECOs either.

Paul: glad to hear they'll be on their way soon! I do indeed have access to
a fische reader. Thanks for your help too!


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