Technics QUARTZ SL-MA1 - Page 18

SL-MAt1 -MA1
ITROL CIRCUIT pea: TURNTABLE
CONTROL CIRCUIT
Initial value
settin
Servo
CONZOFE
ve
Ss
Speed
det
amp.
V!
$
to}
(4.,193MHz)
1c
20
{C201(1/4)
O
ie
ct
=o
eee
2
-
comparator
|
H
20msec.
SF
13
gf
ee
L—+3
—Wstop.
PLAY
----"L
l2v
msec,
[—
eLEAD-IN “ue
---- H
*RETURN
\
ve
R20!
set
voltage
Phase
12v adj. comparator
17
1c201
(1/4)
SV FG coil
1€204
(172)
Synchronous
l2v -rush
Strobe
drivider
sror.: “ (S Switching
PLAYS
ak
ye)
=
ren
Yo
REFERENCE
VOLTAGE
(O)a204
20s
ee
9201
sv
GENERATOR
CIRCUIT
|
>
Vr
- az09 a
INVERSE ELECTROMOTIVE
VOLTAGE DETECTION CIRCUIT
© TURNTRABLE
INITIAL VALUE snes
SETTING CIRCUIT
Start."
12Vv
BBL"
Speed command
IC201(174)
“TURNTABLE
[| DRIVE CIRCUIT
& Clock
frequency
adj.
PHONO
OUT
Cartridge Muting relay .
prevention
circuit
Between Al and A2
R Hall element 8 Between A3 and A4
signal processing
D603 D503
(REP) (17) 5v
@ CUEING, | Position det.
Ups tt
Down <:"H" Dl Ul
He | C$ ac tine
j
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7 y
av Regulator
1c402
PCSO! 12V
ag rs LED drive
Ae
(POWER)
y).-
AER
susition
402
e401
-
g senao a ee pelea POWER SUPPLY CONTROL CIRCUIT
| 5V | 5V 5V SV Q50!
|
LED
drive
SITION J
ION CIRCUIT RECORD SIZE DETECTION LED DRIVE CIRCUIT
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