Fostex B-16 - Page 13

reaches ±1 second to 0 second, a ZERO signal from the counter LSI (U23)
is input to U4-2 at "L" level. If the tape speed at this instant is such
that U7-6 goes to “ L" level, then U4-3 goes to "L" level. If tape speed is
still fast and U7-6 is at "H" level, then the above operation after depres 
sing the ZERO RTN button, is repeated.
If U4-3 goes to "L “ level and the mode is RTN TO PLAY, then, U5-9 goes to
“ L “ level and thus enters the PLAY mode. At the same time, "L" is output
from U4-10 and passing through U3-8, becomes "H" level at U6-10 to reset
the flip-flop and thus ZERO RTN is cancelled.
If the mode is RTN TO STOP, U2-12 goes to "L" and thus enters STOP mode. *
/
Then, Q16 switches ON, the collectors goes to "L" and passing through D69
and 03-8, resets flip-flop U6 and ZERO RTN is cancelled.
4) EDIT mode
EDIT mode means the condition whereby the transport reel servos are active
and tape is stopped by balanced tension from the left and right reel
motors.
While the transport is in the STOP mode, depressing the STOP button an odd
number of times will put the D flip-flop output 08-13 to "H" level and an
"H" level will be output from 010-3. The FAST SOL is activated by this
output, the brakes released, the collector of Q16 becomes open and the
reel servo circuit goes into the EDIT mode.
If the STOP button is depressed while in the EDIT mode, the D flip-flop
UB-13 output goes to "L ” and the transport will enter STOP mode.
4.2 Remote Punch In/Out, REC-PLAY
The latching type foot switch is plugged into the rear panel REMOTE PUNCH
IN/OUT phone jack. .
The signal obtained by repeated charge and discharge of C17 each time the
foot switch is depressed, is applied to ul-6 and the same delayed signal
is also applied to Ul-5 and a pulse is output from Ul-4. U8-4 is at "L"
level when in the PLAY mode and D flip-flop U8 is inverted by Ul-4. Due to
this, U8-1 alternates between "H" and "L" and thus send or cut off a
transport REC signal to J10-1. (Refer to Fig. 4.2)
When in the REC-PLAY modes, U8-6 goes to "11", and regardless to output
level of Ul-4, U8-1 goes to "H" and a transport REC signal is output to
J10-1.
, , ■ . ,1
4.3 Input monitor
An ENCODE/DECODE output which is an individual input monitor control signal,
4-1984 FOSTEX CORP. 8288 0681 00 10