28 Nov
2008
28 Nov
'08
1:06 p.m.
On 28/11/2008 04:39, Curtis H. Wilbar Jr. wrote:
One annoying thing about Teac is that they don't put a description of the
jumpers in the service manual (I have several such manuals for drives
that I own). Why not, I don't know.
Another is a TEAC FD-235HF and has jumpers for: H
HO, OP, LHI, HHI,
and a position (but no header pins) for FG.
See if Google can find you a document called 3fd0020a.pdf -- that's
TEAC's config sheeet for the whole FD235 range. There are lots of The last is a
Sony MPF520-1 which has 2 rows of 3 pins... and I have
no idea what they are for.
I understand some abbreviations... RDY (ready), DC (disk change),
but not MD, MM, TTL/C-MOS (assuming this is for interface logic
levels?), and the TEAC ones I don't know at all.
MD and MM usually refer to what turns the motor on: only when asserted
with Drive Select, or any time the Motor On signal is active.
The Sony one is a mystery, and a google search
hasn't turned
anything up... don't know if the headers are for selecting D0-D3
only... or more than that.
Some Sony drives have jumpers to determine when they output index pulses
(only when the drive is up top speed, or always). But if you only have
a few, they're probably just the drive select jumpers.