10 Feb
2011
10 Feb
'11
12:23 a.m.
Ah, I,ve figured out how to remove this motor board now. The clip-looking
piece of metal at the front is indeed a clip and once the screws are undone
you can unclip the clip from the casing so that the whole lot, clip,board
and motor comes up all as one unit (I should take photos of this for others
who might have to take these apart).
The clip is attached (soldered over) two of the outer pins of the suspected
TA 7259 (assuming I'm on the right track). If I can desolder the clip (so I
can get to the pins), bridge the two pins it bridged then partly reassemble
I might have a drive where i can activate the motor and test the signals on
those pins.
*heating soldering iron up*
Terry (Tez)
----- Original Message -----
From: "terry stewart" <terry at webweavers.co.nz>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Wednesday, February 09, 2011 9:53 PM
Subject: Re: Apple Lisa 2/10 - Progress
I think I know what you mean now. That TA 7259 is the
chip underneath the
large brown clip/cover at the front of the drive. I'm not sure how to
remove the latter though? I seems solidly glued in covering the pins of
the chip. If I could remove this, I could measure the signals on these
pins when I tap the switch (thereby fooling the drive into thinking a disk
is present).
Or do you need to remove the motor, switches, plugs and then slide the
motor PCB out towards the rear until it's clear of that clip/cover.
Thinking about it, that's probably what's needed. In that case, it won't
be so easy to test as everything will be in bits.
Terry