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5.5 FUNCTION SELECTOR
ïVhen ttre CT-X50 is used with the A-X30 or
A-X50, this function selector circuit passes signals
to the A-X30 or A-X50 indicating the tape deck
operational status.
IC405 (M51202L) receives output signals via
diodes D409, D408 and D432 from different
1C402 (8A843) output pins during different opera-
tional modes. During playback, fast forward and
rewind modes, pin 1 of IC405 is at a higher po-
tential than pin 2, resulting in pin 3 being switched
to L level. If t'Lre deck is then switched to record-
ing mode, the D432 cathode is switched to H level
and the D409 and D408 cathodes are switched to
L level. with the D432 cathode at H level, pin 2 of
IC405 is switihed to a higher potential than pin 1,
resulting in pin 3 being switched to H level. Pin 3
is also switched to H level during stop mode due
to +B being applied to pin 2. C443 and C442
have been inserted in order to prevent misopera-
tion during mode switching (use is made of the
time constants of these capacitors during each type
of mode switching).
5 . 7 T I M I N G C H A R T
MS MODE
O- PLAY
O - F A S T
O - R E C
+ B
Fig. 5-1 7 Function selector
5.6 AUTO TAPE SELECTOR
Tape selection of normal, chrome and metal
tapes in the CT-X50 is performed automatically
by detecting special detector holes in the respec-
tive cassette halves. The presence/absence of these
holes is detected mechanically by S14 and S15.
Depending on the rezultant switch combination,
the required supply voltage is applied to the
oscillator circuit in order to obtain the appro-
priate bias level for each type of type.
STOP
M S M O D E
PLAY
F A S T S I G N A L
lC 8A843 Pin14
P I N C H
S O L E N O I D
HEAD BASE
M S S O L E N O I D
J
F F S O L E N O I D
R E W S O L E N O I D
M S M U T I N G
lC 8A336 Pin 6
MS PLAY PULS
lC 8A336 Pin 8
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