Sharp GF-6060H - Page 7

3) In the case the APSS switch is pushed on just when
the programs space (non-signal recorded part) is
being traced in playback:
Here, the Q104 is kept off (see Figure 7—2), and
assuming the charging of C152 is not yet completed,
the Q106 turns on to permit the timer standby
mode. If the tape advances to the signal recorded
part, the Q104 turns on and the C152 discharges
(see Figure 7—3). Then, if the tape reaches the
programs space, the Q104 turns off, a current is
caused at the C152, the Q106 turns on, and the
plunger is activated (see Figure 7—4).
4) In the case the APSS switch is pushed on just when
the signal (program) recorded part is being traced
in playback:
The Q104 turns on (Figure 7—3), and if the programs
space is reached, the plunger will be on as shown
in Figure 7—4.
5) Besides with the APSS switch on, the Q103 turns
on to stop (mute) the VU signal coming from the
power amplifier (1C103).
= ALC (Automatic Level Control)
The ALC feature is provided by the level comparator
(1C102). DC voltage at pin of the 1C102 varies —
in a linear form — according to the strength_of input,
and the resultant voltage is applied to pin (16) of the
record/playback amplifier (1C101).
D105 serves as a buffer for the ALC time constant circuit
(C147, R151) — without the function of rectification.
Charge
QIOS
Figure 7—1
Figure 7—2
Discharge
porto ee ee ee
Figure 7—3
Charge
ee = = oe,
Figure 7-4