Teac MT-20D-IO - Page 67

(2) Motion control
The motion control circuit consists of a CLEAR-LEADER CONTROL part,
DIRECTION CONTROL part, SPEED CONTROL part, STOP CONTROL part,
and GO CONTROL part.
THE CLEAR-LEADER CONTROL part is a circuit to control the tape motion
within the clear reader.
The CIRECTION CONTROL part is a circuit to control the tape motion by
the tape winding direction changeover (REV signal change).
The SPEED CONTROL part is a circuit to control the tape motion by the
tape speed changeover (HSD signal change).
The STOP CO~~ROL part is a circuit to control the tape motion when
any of the REV signal, HSD signal and GO signal from the BASIC IfF
changes. The REV signal, HSD signal and GO signal are inhibited
during stop motion.
The GO CONTROL part controls the GO(H) signal to the DRIVE IfF
according to the tape motion control signals from the above-mentioned
two control parts.
GO
I
UTH
I
LTH
I
FWDD
---------
FWDD
I
---------
CLEAR-
LEADER
CONTROL
r---
STOP r--
r-: CONTROL
GO
CONTROL
I
r---:-
I
----
GO (H)
r------- GOD
-
REV -----;-----; DIRECTION I I I FWD (H)
CONTROL r--,---,-------------,----- FWDD
HSD-----=----;i :N~L p---r-----------T---~:::HI
MOTION CONTROL CIRCUIT
t
t
t
f
I
,
,
I
I
I
PRDY RST
SPDEN CLK
Fig.
331
Motion control
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