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AIWA
.
|
CS-350LE,LK
1-6-4. GQ, (2SA7075):
.
Music
sensor
(MS)
signal
muting
action
during
playback.
When this IC,
{TC-9138P}
indicates '0', when a signai enters
pin (2) happens; this circuit is to prevent this from happening.
When Q, is ON, Q, turns ON, cutting the signal off. This causes
Q, to be turned ON
by the output from the music sensor (MS)
display.
:
(base input)
when the +10 bit and the
(emitter input)
middle
horizontal
seg-
ment
are
off,
and
the
upper
feft
vertical
seg-
ment is on.
That is to say,
{
:
ge
OFF
Figure 10.
This combination
only occurs when
"0" is displayed. Also, in
the absence of D,, when the above three LEDs are all off (when
"4" or "7"
is displayed), the MS operation would become un-
stable.
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