5-1.
FUNCTION
SWITCHING
KEY
I
@.
@
®
®
HOLD BAND
Bl
Al
PHONO
H L
L
H
BAND L L
H L
AUX
H
L
H
H
Fig. 1-6
Output
Data
of
AA-100
Pin
®to@
Fig.
1-6
shows the data
output
from
PINS
®
to
@
of
AA-100 when each function key
is
pressed. This
data
is
output
when
the
status prior
to
the key opera-
tion
is
available in
other
function. When the PHONO
key
is
pressed,
"H"
is
applied
to
A
of
the
analog
switch TC4052BP
and
"L"
to
B,
SI
is turned ON and
the phono signal is selected. Similarly, when the
BAND SELECTOR key
is
pressed,
"L"
is
applied
to
A and
"H"
to
B,
and S2
is
turned ON, and when the
AUX key
is
pressed,
"H"
is
applied
to
both
A and
B,
S3
is turned ON, and the respective signal
is
selected.
In the case
of
PHONO and AUX,
"H"
is
output
from
HOLD (PIN
@ ), and therefore,
the
tuner
CPU
AT-600
is
put in hold mode and the
tuner
operation
is
stopped.
5-2. TAPE MONITOR
SWITCHING
A2
@
82
@----+---~
IC
16
(TC4052BP)
"ON"' SWITCH
St
So
S2
5 V
0 V
5 V
0 V
Fig.
1-8
Output
of
AA
0
100
Pin@,
® (TAPE
I)
Fig.
1-8
and Fig.
1-9
show the
output
of
A and B
and the operation switch timing chart
of
the. analog
switches 1Cl6 and
17
(TC4052BP) when TAPE 1 or
TAPE 2 keys are pressed.
In both cases, the control
data
sections
of
A=
"L"
and B =
"L"
are provided to operate the dummy
switch S
0
so
that no oscillating loop due to the short-
circuit
of
the
REC
and
PB
lines can be created.
HOLD
@------------
5 V
0 V
5 V
0 V
~-----'""
40msec,.I
...
__
_
BAND~
Bl
Al
------------sv
--
0 V
5 V
@---------
0 V
Fig.
1-7
Output
Data
of
AA-100 Pin ®
to
@
(When press the BAND key)
If
the same function key is pressed a second time, no
change occurs
in
the
output
of
Pins ®
to
@
of
AA-100, except
that
if
the BAND SELECTOR key
is
pressed repeatedly in tuner mode, the pulse
of
40 msec
is
output
at Pin ® while the S2 (switch for
tuner) ON data remains unchanged
at
Pins @
and
® as shown in Fig. 1-7. That is, it will turn
ON
the
BAND SELECTOR key equivalent
of
the
tuner
key
matrix and the band
is
switched
in
the sequence
...
FM,
LW,
MW,
FM
...
A3
@
B 3 ®
----;-----1
IC16(TC4052BPl
..
ON"
SWITCH
s,
So
S2
5 V
0 V
5 V
0 V
Fig.
1-9
Output
of
AA-100
Pin®,
@ (TAPE 2)
------------SERVICE
MANUAL AA·R22/L, AA-R32/L,
AA-R42------------
9
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