Fig. 332 Tape Position Management - Teac MT-20D-IO Maintenance Manual

(3) Tape position manangement
The TAPE POSITION MANAGEMENT CIRCUIT is a circuit to convert hole
information from the DRIVE IfF into tape position code. This circuit
becomes operable after initialization has been completed.
After Power ON (with the cassette loaded). cassette loading, or
resetting. this circuit is inhibited by the PRDY signal until the EOT
or BOT side clear leader is detected.
After the EOT or BOT side clear leader is detected and the tape
position is initialized (each signal of UTHI and LTHI is set to
either EOT position or BOT position status), the inhibit of this
circuit is released. Then,
this
circuit is placed in operable
status.
FWDD
HOL(H)
I
---------
..
TAPE POSITION
I
MANAGEMENT
t
I
HOLE
I
CLOCKING
-----------~
TAPE POSITION MANAGEMENT
CIRCUIT
,
•
,
I I I
I I I
RST PRDY eLK
Fig. 332 Tape position management
- 356 -
UTa
LTH
HOLD