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FDD412A/B
5
Changing
VFO
clock
phase
Set
to
the
desired
phase
method
according
to
the
list
below,
using
jumper
wire.
Pee
Open
between
5 and
6.
Short
between
5 and
6.
NOTE:
For
the
detail
of
A and
B methods,
refer
to
Instruction
Manual
of
the
device.
Changing
door
lock
mode
Set
to
the
desired
door
lock
mode
according
to
the
lit
below,
using
jumper
plug.
JP-2
position
perational
Short
between
can
be
locked
only
by the
ENGAGE
1 and
3.
Signal.
Short
between
can
be
1 and
2.
Or
HEAD
ENGAGE
signals.
Test
points
The
following
signal
names
are
used
for
test
points
(TP).
Read
signal
Read
signal
DATA
SS
(luS)-1P
DATA
SS
(0.5uS)-1P
VCO
CLOCK-P
STEP-P
TRACK
QO0-P
INDEX~-1P
—lii-
locked
by
either
DOOR
JP/
(a)
FDD* 0
IPI
.
(b) FDD"}
JP}
Fig.l
Address
setu
(tc) FOD*2
JP/
(4) FDD* 3
(aj)
Mode
1l
(In
case
the
unit
is the
type B
and
the
other
unit
the
type
A.)
ACE
epee
/
tofediooooodrs
/6{0_ GJ O19
9 O Of2 4,0 Of DJo00 0j24
JP/
(a) Mode
1
(In
case
the unit is the type
A
and
the
other
unit
the
type
A.)
'ae
balk
(4
H A
pon
i
Mode
3
{c}
Fig.2
(b)
Mode
2
(In
case
the
unit
is
the
type
A
and
the
other
unit
the
type
B.)
(d) Mode
4
(In
case
the
unit
is
the
type
B
and the other
unit the type B.)
Daisy
chain
configuration
mode
select
ony)
ot
/6[9_ 8}0 0000
012
IPI
JP}
JP!
(b) Mode: 2
(c) Mode 3
(d) Mode 4
—112-—
Fig.3
Daisy
chain
mode
setup
chart
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