Sony PS-X7 - Page 35

SONY-00830 / DRUCK 19
Since return operation has 5een
compisted, S& is touched.
F ? !
La 1 (switch: ON)
start/stop _AL__. 1d [5
switch (S5) |
| 1 (inversion)
start/stop : if 0 (D1 light up)
flip-F. i
HERR : i (inversion)
: 1 (motor rotates)
motor : ;
flip-flop | - if |
| : eae eae“ Gnaas 7 rae (switch: ON)
REPEAT | ( f | itl 0
switch (S6) | 4 |
' (inversion)
| |
repeat | VJ : v ’ (D2 lights up)
flip-flop
'
|
od
|
feel |—1 (switch: ON)
play switch (S3) TI | 1 ag fa)
| A | 7 (switch: ON)
return switch | { ; ( | 0
(S4) fe es {al me
i n | Pal \ Fy | i a 1 (during solenoid operation)
solenoid operation . 0
[ary dept jel!
oa po tl | | ipy—1 (0410: on)
reset (0410) ——1 Lt Slo
auto-return
ee
Oat:
ora
eS
1
(with
output)
output
:
0
Te
ee
(S5
STOP)
(S6
REPEAT)
|\detection,
ol has peer)
( lead-in has Hey completed.
completed.
completed, and solenoid i:
(como operation has been )
is
operated again.
Fig. 3-8.. Repeat operation
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3-5. Repeat Operation (See Fig. 3-9)
When the feather-touch repeat switch (S6) is.
touched during play, the repeat indicator (LED) D2.
lights up, and the same record is played over and,
over again. |
1. When S6 is touched, a negative pulse is’
generated on the collector of Q414. This pulse
inverts the state of the repeat flip-flop circuit,
Q415/Q416. That is, Q416 is turned off, and
Q415 is turned on. :
When Q415 is turned on, the repeat indicator |
‘
{
D2 lights up (route G3).
2. When the tonearm reaches the return position,
the auto-return mechanism is activated, and
the return switch (S4) turned on mechanically.
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Q408,409 2SC633A
START/STOP FLIP ~ FLOP
Q410 2SC633A
RESET
Q415,416 2SC633A
The tonearm then returns to the arm rest, and
S4 then turns off again. But since Q415 is on
in this case, D413 is biased in the forward
direction. Therefore, unlike the operation for
auto-return, Q410 is not turned on (route (@())).
Consequently, neither the start/stop flip-flop
circuit, Q408/Q409 nor the motor flip-flop
Q411/Q412 circuits are inverted in this case.
Q405 is thus forward biased (i.e. turned on) by
the charged voltage in C415 (route GQ).
As a result, a current flows through the solenoid
(PM), the lead-in mechanism is activated, and
the tonearm is again moved across for the
start of play.
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Q413
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Fig. 3-9.