Sony PS-Q3A - Page 5

4. ARM DOWN
@ The claw of the reset block hits the lock pin
(chassis side), and the reset block is set.
@ The lifter rod traces the slope of the cam gear,
and the arm is lowered.
reset block
lock pin
5. PLAYING RECORD
@ S3 goes on and the cam gear stops. Record play-
ing starts.
@ The arm moves inward as the the record plays,
and the arm lead pin moves.
6. RETURN
lead-in plate stopper
(chassis side) * When record playing ends, the end detector detects
it. Then arm drive motor (M1) is driven, and the
cam gear turns counterclockwise.
$3 goes off. -~
The lead-in plate is moved back to the rest posi-
tion.
The lifter rod goes up and the arm is lifted.
The arm lead pin is pressed by the reset block
and the arm returns.
oo O96
7. REST
S6 9
rest switch [Ty
1
1-3. CIRCUIT DESCRIPTION
@ The arm is pressed till the arm rest position.
@ The arm lead pin stops and the reset block is
reset.
® The lead-in cam is locked.
© S6 goes on and the cam gear stops.
The turntable motor (M2) goes off. (Rest mode)
1C102’s (SYSTEM CONTROLLER IC T.C9305P-009) TERMINAL FUNCTIONS
PIN NO.
a ee
START/STOP
°
IN/OUT TIMING CHART
P| Ground terminal
2 Terminal for clock OSC
eo se nas LEAD euleyenne
H
START/STOP button (S2) is pushed.
Rest switch (S6) is released. ;
ee OD
Play switch({S$3)
is pushed.
rer oxrer
END DET
SIZE SELECT
SIZE 30
SIZE 17
ARM OUT
| | End detector (401/402) is ON.
LED (D402) is on for 30cm end detector.
30cm
_—£izem
LED (D401) is on for 17 cm end detector.
OUTPUT
Arm is lifted and moves outwards.
eras oer ea |e
OUTPUT
TT MOTOR
Arm moves inwards and is lowered.
| Turntable motor (M2) is ON. |
Power supply terminal |
OUTPUT
OUTPUT
ie
H
ie
H
L
H
L
OUTPUT ‘ | 7 a
H
L
H
L
H
L