Sony PS-X7 - Page 32

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Q206 is turned on, so a voltage is not applied
to the © input terminal of IC 1-1 (route ).
Q207 is turned off, so a voltage is not applied
to the © input terminal of [C1-1 (route ).
iC1-1 does not operate, and the motor does not
et
urn.
Since Q406 is turned on (by the charge voltage
in C405), Q407 will turn off, thereby prevent-
ing ine solenoid (PM) from being energized.
ICi-1 pPC324C
OC AMP
R226
560 = RV202
4.7k
RV203
4.7k
R227
560
——
WHEN ACTIVATING
|
4
—
.
SOLENOID, SOLENOID]
PUSHES CLAW OF
DRIVE GEAR
S3 (ON: QuaING
Puay\” PLAY
Se aes (ee i al
D4i4 1740 a a
ies
Q417
i 2SC633A
i SWITCHING
—— Ee
{ R442
0414 6.8k
<a AM-———+—
R441 1
5.6K &
SEAVO
BOARD
er tee eins
SONY-00830 / DRUCK 16
PS-X6/KF PS-X6/X7 |
3-2. Operation during Auto-start (See Fig. 3-2) 4. Consequently, Q206 is turned off, and a voltage
. ; is applied to the © input termin -
When the START/STOP feather-touch switch aa s : P inal of ICTY,
(S5)
is
touched:
And
since
Q207
is
turned
on,
a
voltage
is
J
;
applied
to
the
©
input
terminal
of
this
IC.
1. A negative pulse signal is generated on the & oT heree ‘eri ;
; : : ; : erefore, [C]l- ere arti
collector of Q404 (which forms a Schmitt ore operates, starting up the
‘ ne : : . motor.
trigger circuit with Q403). This pulse signal
reverses the state of the. start/stop flip-flop 6. On the other hand, a positive trigger pulse
circuit Q408/Q409, thereby turning Q408 on, signal is generated on the collector of Q403,
and Q409 off. and is applied to the base of Q405 to turn
2. The start indicator (LED) D1 lights up Q405 on (route).
(route). 7. Once Q405 is turned on, C405 is discharged,
3. Current then flows along route _ so the Q406 is turned off and Q407 turned on. As
e id (P i f
collector potential of Q412 inverts the state of ¢ fest the solenoid ( M) is energized, HEIED
the motor flip-flop circuit Q411/Q412. abcivalns the mechanical system for automatic
Namely, Q411 turns off, and Q412 on. lead-in of the tonearm (route __ ).
$2
a} SPEED yee
an 2,
ne i Tees 0203,204 9205 206 207,208 209,210
SF R20 F82k 25C633A 2SA677_ 2SCB33A «SAG 2ecessn
) COMPARATOR BUFFER AMP SWITCHING SWITCHING SWITCHING
Q201 2SC638A 0202 2SCE3BA [F705 ee 2 tH
BUFFER AMP s 10k ‘
MERGE) Fay ooo: EB BE | EE | oe {)
It-2._yPC324C (yy
Oe] He Es Cy rar 8
eL ooo a Ae ae:
MGH
6H
a
82k
SPEED
DETECTING
So
:
=
0.047 Woe R203 iB 0201 ited sane, | 1T40 a |
TOUCH
ar)
R215
35V
-
ie
(
(loam
Ye
|
|
dee
oxo:
rH
mt
er
sda
STARTSTOP 403,404 2SC633A |_| {
Li TRIGGER’ PULSE GENERATO! ” T as
Ri i = 0405,406 2SC633A 0407 28C1475
"
Bsces3a
R401
|
Hor
SWITCHING
SOLENOID
DRIVE
.
.
S55
OC
AMP
4.7k
“6s
|
ar
404
0405
(yr
0407
j
(ee)
||]
oe
|
4
By
al
fe
a
fy Nava a \ aA WHEN ACTIVATING
4
ry
9
y
|
405
4
{
SOLENOID,
SOLENOID
Py | XS i) 45392 | aos R407 R408 22 Ral PRIVE SER
¥ |S 6a Re tev 522k eer {| s3 (0%: DURING
\
|
P
PLAY,
PLAY
= “- zs perenne ee Cay Sen 2 a NTE EE} Ow, ON
|
Pao
{
re
es
Oe
es
D40;~403
1T40
|
F402
RaI2
4,7
—
7
0414
1T40
i.
—
=
i | 40403 Q417
~ Q408,409 2SC633A Q410 2SC633A Q411,412 2SC633A 2S(633A
1 OuC' START/STOP FLIP-FLOP RESET |__MOTOR DRIVE FLIP-FLOP. SWITCHING
i
R413
C.
¢
9
1K 407, C408 aig 409 R442
L_| 0.947 6.047
i Rass + ies eal. 3 si ie 88K T giz
R419 i CH | 7
56k
0404,405
vi
=
0415
1T40 416
3) 3.3 IT40
a
Q408
CH
25V
0415,4
041,
REPEAT FLIP-FLOP [
16 2SC633A
SSisv D406~409 1T40
Q413,414 2SC633A
R430
'0k
Oc AMP
C42, C413
1/S0V__1/50V
Fig. 3-2.
$4 RETURN