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m@ BLOCK DIAGRAM
eLead-in "HY
eLead- in"L"
Return "L"
¢Return "H"
22
$309
Dane eee sceeece
POWER SUPPLY CIRCUIT
°
ICI
DI
Tl
33
6
45
l2v
tecti
C AC line
Regula-
Sensor gain adj.
SENSITVITY
Blank groove
Turntable drive
13. sensor
Arm motor
drive
Clock frequency
adj.
$307
RESET
(CABINET)
lalle
signal proce
ssing
circuit
Cueing
CUEING CONTROL
CIRCUIT
°Stop
"L"
e Lead-in/Return"H"
|
SYNCHRO
REC/
PHONO START
REST
ARM MOTOR DRIVE & BLANK GROOVE
DETECTION
CIRCUIT
Q3i1
D310
Cueing up
Between Al and A2
Between A3 and A4
Blank groove
:
Offset
faites _,
9304) | angie sensor fpcsoi | |)
TURNTABLE CONTROL CIRCUIT
; a
OFFSET ERROR ANGLE
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AN6683
PHONO OUT
'
Sv
DETECTION
CIRCUIT
a
33rpm = 20ms
Reference signal generation,
F.G amplifier
speed
and
phase control.
Servogain
| VRSOI
adj.
IC401(172)
(4.193 MHz)
O
A
aes
r
MUSIC
SELECT
INDICATOR
ape
X20!
fe
i
Muting
Relay
ane
/
|
/
;
a
L_—-~-~~~—~-~—~~~~~~~~-~
a
asa
Muting'off'*--H'
Q306
MUTING DRIVE
Muting 'on=-"L"
al]
BY
Converter
(ay
CIRCUIT
Waveform,
shaping
IC401(1/2)
Arm position
sensor
Q305
Timer
SV
VR302
Stylus cue- down
adj
\
ie
3
3
oO
wa a
e@ Music selector indica
microcomputer (IC
D311 (LN513RA)
1C301 (MN1420FPL)
31
32
33
(DOO)|(DO!)|(DO2
a
b
c
om
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